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# Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France)

Garry Dorleon, Isabelle Techer, Sylvain Rigaud

► To cite this version:

Garry Dorleon, Isabelle Techer, Sylvain Rigaud. Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France). Data in Brief, 2024, 54, pp.110509. 10.1016/j.dib.2024.110509. hal-04579808

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Submitted on 23 May 2024

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Distributed under a Creative Commons Attribution 4.0 International License
# Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France)

Garry Dorleon, Isabelle Techer, Sylvain Rigaud

► To cite this version:

Garry Dorleon, Isabelle Techer, Sylvain Rigaud. Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France). Data in Brief, 2024, 54, pp.110509. 10.1016/j.dib.2024.110509. hal-04579808

HAL Id: hal-04579808

https://hal.science/hal-04579808v1

Submitted on 23 May 2024

HAL is a multi-disciplinary open access
archive for the deposit and dissemination of sci-
entific research documents, whether they are pub-
lished or not. The documents may come from
teaching and research institutions in France or
abroad, or from public or private research centers.

L'archive ouverte pluridisciplinaire HAL, est
destinée au dépôt et à la diffusion de documents
scientifiques de niveau recherche, publiés ou non,
émanant des établissements d'enseignement et de
recherche français ou étrangers, des laboratoires
publics ou privés.

<figure><img src="image_1.png" /></figure>

Distributed under a Creative Commons Attribution 4.0 International License
Data Article

Geochemical characterization data of harbors
dredged sediments in the Occitanie region
(southern France)

<figure><img src="image_3.png" /></figure>

Garry Dorleon\*, Isabelle Techer, Sylvain Rigaud

UPR 7352 CHROME, Site Hoche - Université de Nîmes, Laboratoire Géosciences de l'Environnement, 1 place du président Doumergue, 30000 Nîmes, France

ARTICLE INFO

Article history:

Received 5 February 2024

Revised 24 April 2024

Accepted 6 May 2024

Available online 11 May 2024

Dataset link: Geochemical characterization
data of harbors dredged sediments in the
Occitanie region (southern France) (Original
data)

Keywords:

Waste management

Circular economy

Coastal sediment quality

Physicochemical properties

Dredging

harbors sediments

A B S T R A C T

Over the last 15 years, numerous analyses of sediment from
the Mediterranean harbors of Occitanie (Southern France)
has been made before dredging operations in order to assess
geochemical quality of dredged sediment and define the ex-
tend of dredging project and the potential fate of dredged
sediment (sea dumping vs management on land). However,
these data are today scattered, printed and stored as archives,
and not directly accessible. With time, those data are ex-
pected to be lost for the community whereas they constitute
an irreplaceable and mobilizable knowledge base to address
the challenges of the circular economy. Characterization data
aid in developing regulations for better land-based manage-
ment of dredged sediments. Existing data are also needed
to define pollutant limits in sediments for different uses of
marine resources. The collection of these data can thus of-
fer a unique opportunity to assess the geochemical quality
of dredged marine sediments and their determining factors.
The dataset collected is composed of geochemical character-
istics of 146 marine sediments wastes collected before dredg-
ing operations between 2010 and 2021. The sampling was
designed to capture the large diversity of sediment distri-
bution in harbors of southern France. The dataset contains
a wide range of variability in the composition characteristics
of dredged sediment (dry matter, organic matter, total nitro-
gen and phosphorus, sulphate, chloride, trace metals and or-

ARTICLE INFO

<footnote>* Corresponding author.</footnote>

<footnote>E-mail address: garry.dorleon@unimes.fr (G. Dorleon).</footnote>
Data Article

# Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France)

<figure><img src="image_2.png" /></figure>

Garry Dorleon\*, Isabelle Techer, Sylvain Rigaud

UPR 7352 CHROME, Site Hoche - Université de Nîmes, Laboratoire Géosciences de l'Environnement, 1 place du président Doumergue, 30000 Nîmes, France

ARTICLE INFO

Article history:
Received 5 February 2024
Revised 24 April 2024
Accepted 6 May 2024
Available online 11 May 2024

Dataset link: Geochemical characterization
data of harbors dredged sediments in the
Occitanie region (southern France) (Original
data)

**Keywords:**
Waste management
Circular economy
Coastal sediment quality
Physicochemical properties
Dredging
harbors sediments

A B S T R A C T

Over the last 15 years, numerous analyses of sediment from the Mediterranean harbors of Occitanie (Southern France) has been made before dredging operations in order to assess geochemical quality of dredged sediment and define the ex- tend of dredging project and the potential fate of dredged sediment (sea dumping vs management on land). However, these data are today scattered, printed and stored as archives, and not directly accessible. With time, those data are ex- pected to be lost for the community whereas they constitute an irreplaceable and mobilizable knowledge base to address the challenges of the circular economy. Characterization data aid in developing regulations for better land-based manage- ment of dredged sediments. Existing data are also needed to define pollutant limits in sediments for different uses of marine resources. The collection of these data can thus of- fer a unique opportunity to assess the geochemical quality of dredged marine sediments and their determining factors. The dataset collected is composed of geochemical character- istics of 146 marine sediments wastes collected before dredg- ing operations between 2010 and 2021. The sampling was designed to capture the large diversity of sediment distri- bution in harbors of southern France. The dataset contains a wide range of variability in the composition characteristics of dredged sediment (dry matter, organic matter, total nitro- gen and phosphorus, sulphate, chloride, trace metals and or-

<footnote>* Corresponding author.</footnote>

<footnote>E-mail address: garry.dorleon@unimes.fr (G. Dorleon).</footnote>
ganics elements). Because the dataset provides information about the characteristics defining the geochemical quality of dredged sediments, it can be used further for research, waste management or dredged sediment valorization, and repre- sent a great interest to other researchers, harbors managers and stakeholders in search of references on the geochemical quality of dredged sediments for their reuse.

© 2024 The Author(s). Published by Elsevier Inc.

This is an open access article under the CC BY license

(http://creativecommons.org/licenses/by/4.0/)

## Specifications Table

<table><tr><td>Subject</td><td>Chemistry and Environmental Sciences</td></tr><tr><td>Specific subject area</td><td>Geochemical composition of dredged marine sediment</td></tr><tr><td>Type of data</td><td>Table, Figure</td></tr><tr><td>Data format</td><td>Raw, Analyzed</td></tr><tr><td>Data collection</td><td>Raw data were acquired, from 10 harbors in Occitanie (southern France), between 2010 and 2021, as the result of measurements, sampling and analysis before sediments dredging operations. Analysed data included compositional parameters such as hydrogen potential, particle size, dry matter and organic matter contents, total phosphorus and nitrogen, leached chlorides, sulphates and fluorides, metalloids and metals contents and organics contaminants concentrations.</td></tr><tr><td>Data source location</td><td>Institution: Université de Nîmes<br>City/Town/Region: Occitanie (Southern France)<br>Country: France<br>The dataset provides GPS coordinates of the sampling points.</td></tr><tr><td>Data accessibility</td><td>Repository name: Recherche Data Gouv<br>Data identification number: 10.57745/CLDJVQ<br>Direct URL to data: https://doi.org/10.57745/CLDJVQ<br>Licenses of use: etalab 2.0 (https://spdx.org/licenses/etalab-2.0.html)</td></tr></table>

## 1. Value of the Data

* The dataset provides information about the physicochemical composition diversity of dredged marine sediments. these data are useful for developing regulatory framework to improve circular management of dredged sediments. These data are also needed to define pollutant limits in sediments for different uses of marine resources.

* The dataset in this article provides information about the characteristics defining the geochemical quality of dredged sediments studied. It can be used further for research, improve waste management, and/or dredged sediment valorization.

* The dataset contains a wide range of variability on the composition of marine sediments, can be merged with other databases and represent a great interest to other researchers, harbors managers and stakeholders in search of references on the quality of dredged sediments for their reuse in various applications ranging from construction to plant growth medium.

## 2. Background

In this vibrant narrative of climate action, recycling emerges as a beacon of hope and ingenuity. A myriad of initiatives, driven by a shared commitment to environmental stewardship,
ganics elements). Because the dataset provides information about the characteristics defining the geochemical quality of dredged sediments, it can be used further for research, waste management or dredged sediment valorization, and repre- sent a great interest to other researchers, harbors managers and stakeholders in search of references on the geochemical quality of dredged sediments for their reuse.

© 2024 The Author(s). Published by Elsevier Inc.

This is an open access article under the CC BY license

(http://creativecommons.org/licenses/by/4.0/)

<table><caption>Specifications Table</caption><tr><td>Subject</td><td>Chemistry and Environmental Sciences</td></tr><tr><td>Specific subject area</td><td>Geochemical composition of dredged marine sediment</td></tr><tr><td>Type of data</td><td>Table, Figure</td></tr><tr><td>Data format</td><td>Raw, Analyzed</td></tr><tr><td>Data collection</td><td>Raw data were acquired, from 10 harbors in Occitanie (southern France), between 2010 and 2021, as the result of measurements, sampling and analysis before sediments dredging operations. Analysed data included compositional parameters such as hydrogen potential, particle size, dry matter and organic matter contents, total phosphorus and nitrogen, leached chlorides, sulphates and fluorides, metalloids and metals contents and organics contaminants concentrations.</td></tr><tr><td>Data source location</td><td>Institution: Université de Nîmes<br>City/Town/Region: Occitanie (Southern France)<br>Country: France<br>The dataset provides GPS coordinates of the sampling points.</td></tr><tr><td>Data accessibility</td><td>Repository name: Recherche Data Gouv<br>Data identification number: 10.57745/CLDJVQ<br>Direct URL to data: https://doi.org/10.57745/CLDJVQ<br>Licenses of use: etalab 2.0 (https://spdx.org/licenses/etalab-2.0.html)</td></tr></table>

1. Value of the Data

* The dataset provides information about the physicochemical composition diversity of dredged marine sediments. these data are useful for developing regulatory framework to improve circular management of dredged sediments. These data are also needed to define pollutant limits in sediments for different uses of marine resources.

* The dataset in this article provides information about the characteristics defining the geochemical quality of dredged sediments studied. It can be used further for research, improve waste management, and/or dredged sediment valorization.

* The dataset contains a wide range of variability on the composition of marine sediments, can be merged with other databases and represent a great interest to other researchers, harbors managers and stakeholders in search of references on the quality of dredged sediments for their reuse in various applications ranging from construction to plant growth medium.

2. Background

In this vibrant narrative of climate action, recycling emerges as a beacon of hope and ingenuity. A myriad of initiatives, driven by a shared commitment to environmental stewardship,
<caption>**Table 1**</caption>

Mean values of geochemical composition parameters for each type of dredged marine sediment (pH: hydrogen potential; Cl: chloride; F: fluoride; SO4: sulphate; Cd: cadmium; Al: aluminum; Cr: chromium; As: arsenic; Cu: copper; Ni: nickel; Pb: lead; Zn: zinc; Hg: mercury; TBT: tributyltin; HAP: polycyclic aromatic hydrocarbons; PCB: polychlorinated biphenyls; Sand: sand content; Mud_2mm: silt content on fraction < 63 µm; Density: bulk density; Total N : total nitrogen; Total P: phosphorus total; DM: dry matter content; OM: organic matter content).

<table><thead><tr><th>Sediment</th><th>Sample size</th><th>pH</th><th>Cl</th><th>F</th><th>SO4</th><th>Cd</th><th>Cr</th><th>Al</th><th>As</th><th>Cu</th><th>Ni</th><th>Pb</th><th>Zn</th><th>Hg</th><th>TBT</th><th>HAP</th><th>PCB</th><th>Sand</th><th>Mud 2mm</th><th>Density</th><th>Total N</th><th>Total P</th><th>DM</th><th>OM</th></tr></thead><tbody><tr><td>Harbor 1</td><td>9</td><td>7,99</td><td>14,761,01</td><td>6,14</td><td>2011,41</td><td>0,20</td><td>35,13</td><td>32,960,78</td><td>7,71</td><td>145,57</td><td>18,44</td><td>25,87</td><td>136,18</td><td>0,07</td><td>54,99</td><td>0,23</td><td>0,01</td><td>5,93</td><td>65,14</td><td>1,55</td><td>1,28</td><td>767,03</td><td>59,38</td><td>37,68</td></tr><tr><td>Harbor 2</td><td>22</td><td>8,08</td><td>28,115,53</td><td>8,71</td><td>3213,52</td><td>0,32</td><td>33,69</td><td>20,718,21</td><td>9,70</td><td>121,34</td><td>19,06</td><td>44,37</td><td>106,39</td><td>0,18</td><td>146,34</td><td>1,43</td><td>0,04</td><td>9,79</td><td>82,95</td><td>1,39</td><td>3,06</td><td>1122,29</td><td>45,57</td><td>46,44</td></tr><tr><td>Harbor 3</td><td>10</td><td>8,25</td><td>20,276,47</td><td>7,09</td><td>3142,36</td><td>0,19</td><td>29,46</td><td>19,071,10</td><td>10,06</td><td>98,35</td><td>19,78</td><td>22,39</td><td>91,44</td><td>0,11</td><td>53,87</td><td>0,79</td><td>0,08</td><td>3,64</td><td>70,11</td><td>1,45</td><td>2,19</td><td>800,32</td><td>46,94</td><td>37,70</td></tr><tr><td>Harbor 4</td><td>5</td><td>8,48</td><td>12,910,44</td><td>3,86</td><td>2675,00</td><td>0,11</td><td>20,58</td><td>7624,00</td><td>9,98</td><td>77,46</td><td>15,56</td><td>17,97</td><td>71,30</td><td>0,13</td><td>44,10</td><td>0,28</td><td>0,05</td><td>9,87</td><td>55,06</td><td>1,58</td><td>1,06</td><td>1039,40</td><td>57,62</td><td>14,31</td></tr><tr><td>Harbor 5</td><td>20</td><td>8,29</td><td>13,970,79</td><td>4,80</td><td>3427,98</td><td>0,24</td><td>28,91</td><td>16,557,71</td><td>17,37</td><td>110,89</td><td>20,29</td><td>33,19</td><td>136,49</td><td>0,12</td><td>139,79</td><td>1,04</td><td>0,05</td><td>13,44</td><td>64,20</td><td>1,58</td><td>1,71</td><td>1408,08</td><td>65,53</td><td>29,16</td></tr><tr><td>Harbor 6</td><td>24</td><td>8,54</td><td>18,162,16</td><td>5,28</td><td>3470,92</td><td>0,26</td><td>25,54</td><td>14,395,54</td><td>7,08</td><td>43,49</td><td>15,45</td><td>26,75</td><td>66,14</td><td>0,11</td><td>13,92</td><td>2,95</td><td>0,02</td><td>14,25</td><td>57,72</td><td>1,87</td><td>2,27</td><td>657,70</td><td>84,10</td><td>50,17</td></tr><tr><td>Harbor 7</td><td>29</td><td>8,72</td><td>9811,59</td><td>2,62</td><td>2339,65</td><td>0,12</td><td>19,68</td><td>10,235,19</td><td>8,68</td><td>95,38</td><td>15,83</td><td>15,39</td><td>91,63</td><td>0,10</td><td>505,90</td><td>0,44</td><td>0,03</td><td>12,74</td><td>36,27</td><td>1,75</td><td>0,70</td><td>463,08</td><td>68,85</td><td>15,36</td></tr><tr><td>Harbor 8</td><td>8</td><td>8,20</td><td>13,195,49</td><td>6,64</td><td>1329,54</td><td>0,26</td><td>36,73</td><td>31,730,47</td><td>14,27</td><td>94,07</td><td>22,16</td><td>48,17</td><td>155,84</td><td>0,36</td><td>116,05</td><td>3,59</td><td>0,32</td><td>15,53</td><td>57,53</td><td>1,64</td><td>1,20</td><td>710,31</td><td>73,48</td><td>35,35</td></tr><tr><td>Harbor 9</td><td>10</td><td>8,12</td><td>8572,00</td><td>0,99</td><td>1464,33</td><td>0,10</td><td>21,48</td><td>11,831,00</td><td>14,36</td><td>37,71</td><td>18,66</td><td>22,18</td><td>76,40</td><td>0,12</td><td>10,72</td><td>0,39</td><td>0,05</td><td>0,00</td><td>26,62</td><td>1,80</td><td>0,59</td><td>507,60</td><td>72,13</td><td>16,65</td></tr><tr><td>Harbor 10</td><td>9</td><td>8,22</td><td>16,656,67</td><td>7,88</td><td>2850,20</td><td>0,23</td><td>29,79</td><td>19,035,75</td><td>10,70</td><td>100,70</td><td>18,85</td><td>33,26</td><td>110,40</td><td>0,13</td><td>168,33</td><td>1,25</td><td>0,03</td><td>19,68</td><td>64,40</td><td>1,58</td><td>2,06</td><td>978,63</td><td>59,27</td><td>34,43</td></tr></tbody></table>
<caption>**Table 1**</caption>

Mean values of geochemical composition parameters for each type of dredged marine sediment (pH: hydrogen potential; Cl: chloride; F: fluoride; SO4: sulphate; Cd: cadmium; Al: aluminum; Cr: chromium; As: arsenic; Cu: copper; Ni: nickel; Pb: lead; Zn: zinc; Hg: mercury; TBT: tributyltin; HAP: polycyclic aromatic hydrocarbons; PCB: polychlorinated biphenyls; Sand: sand content; Mud_2mm: silt content on fraction < 63 µm; Density: bulk density; Total N : total nitrogen; Total P: phosphorus total; DM: dry matter content; OM: organic matter content).

<table><thead><tr><th>Sediment</th><th>Sample size</th><th>pH</th><th>Cl</th><th>F</th><th>SO4</th><th>Cd</th><th>Cr</th><th>Al</th><th>As</th><th>Cu</th><th>Ni</th><th>Pb</th><th>Zn</th><th>Hg</th><th>TBT</th><th>HAP</th><th>PCB</th><th>Sand</th><th>Mud 2mm</th><th>Density</th><th>Total N</th><th>Total P</th><th>DM</th><th>OM</th></tr></thead><tbody><tr><td>Harbor 1</td><td>9</td><td>7,99</td><td>14,761,01</td><td>6,14</td><td>2011,41</td><td>0,20</td><td>35,13</td><td>32,960,78</td><td>7,71</td><td>145,57</td><td>18,44</td><td>25,87</td><td>136,18</td><td>0,07</td><td>54,99</td><td>0,23</td><td>0,01</td><td>5,93</td><td>65,14</td><td>1,55</td><td>1,28</td><td>767,03</td><td>59,38</td><td>37,68</td></tr><tr><td>Harbor 2</td><td>22</td><td>8,08</td><td>28,115,53</td><td>8,71</td><td>3213,52</td><td>0,32</td><td>33,69</td><td>20,718,21</td><td>9,70</td><td>121,34</td><td>19,06</td><td>44,37</td><td>106,39</td><td>0,18</td><td>146,34</td><td>1,43</td><td>0,04</td><td>9,79</td><td>82,95</td><td>1,39</td><td>3,06</td><td>1122,29</td><td>45,57</td><td>46,44</td></tr><tr><td>Harbor 3</td><td>10</td><td>8,25</td><td>20,276,47</td><td>7,09</td><td>3142,36</td><td>0,19</td><td>29,46</td><td>19,071,10</td><td>10,06</td><td>98,35</td><td>19,78</td><td>22,39</td><td>91,44</td><td>0,11</td><td>53,87</td><td>0,79</td><td>0,08</td><td>3,64</td><td>70,11</td><td>1,45</td><td>2,19</td><td>800,32</td><td>46,94</td><td>37,70</td></tr><tr><td>Harbor 4</td><td>5</td><td>8,48</td><td>12,910,44</td><td>3,86</td><td>2675,00</td><td>0,11</td><td>20,58</td><td>7624,00</td><td>9,98</td><td>77,46</td><td>15,56</td><td>17,97</td><td>71,30</td><td>0,13</td><td>44,10</td><td>0,28</td><td>0,05</td><td>9,87</td><td>55,06</td><td>1,58</td><td>1,06</td><td>1039,40</td><td>57,62</td><td>14,31</td></tr><tr><td>Harbor 5</td><td>20</td><td>8,29</td><td>13,970,79</td><td>4,80</td><td>3427,98</td><td>0,24</td><td>28,91</td><td>16,557,71</td><td>17,37</td><td>110,89</td><td>20,29</td><td>33,19</td><td>136,49</td><td>0,12</td><td>139,79</td><td>1,04</td><td>0,05</td><td>13,44</td><td>64,20</td><td>1,58</td><td>1,71</td><td>1408,08</td><td>65,53</td><td>29,16</td></tr><tr><td>Harbor 6</td><td>24</td><td>8,54</td><td>18,162,16</td><td>5,28</td><td>3470,92</td><td>0,26</td><td>25,54</td><td>14,395,54</td><td>7,08</td><td>43,49</td><td>15,45</td><td>26,75</td><td>66,14</td><td>0,11</td><td>13,92</td><td>2,95</td><td>0,02</td><td>14,25</td><td>57,72</td><td>1,87</td><td>2,27</td><td>657,70</td><td>84,10</td><td>50,17</td></tr><tr><td>Harbor 7</td><td>29</td><td>8,72</td><td>9811,59</td><td>2,62</td><td>2339,65</td><td>0,12</td><td>19,68</td><td>10,235,19</td><td>8,68</td><td>95,38</td><td>15,83</td><td>15,39</td><td>91,63</td><td>0,10</td><td>505,90</td><td>0,44</td><td>0,03</td><td>12,74</td><td>36,27</td><td>1,75</td><td>0,70</td><td>463,08</td><td>68,85</td><td>15,36</td></tr><tr><td>Harbor 8</td><td>8</td><td>8,20</td><td>13,195,49</td><td>6,64</td><td>1329,54</td><td>0,26</td><td>36,73</td><td>31,730,47</td><td>14,27</td><td>94,07</td><td>22,16</td><td>48,17</td><td>155,84</td><td>0,36</td><td>116,05</td><td>3,59</td><td>0,32</td><td>15,53</td><td>57,53</td><td>1,64</td><td>1,20</td><td>710,31</td><td>73,48</td><td>35,35</td></tr><tr><td>Harbor 9</td><td>10</td><td>8,12</td><td>8572,00</td><td>0,99</td><td>1464,33</td><td>0,10</td><td>21,48</td><td>11,831,00</td><td>14,36</td><td>37,71</td><td>18,66</td><td>22,18</td><td>76,40</td><td>0,12</td><td>10,72</td><td>0,39</td><td>0,05</td><td>0,00</td><td>26,62</td><td>1,80</td><td>0,59</td><td>507,60</td><td>72,13</td><td>16,65</td></tr><tr><td>Harbor 10</td><td>9</td><td>8,22</td><td>16,656,67</td><td>7,88</td><td>2850,20</td><td>0,23</td><td>29,79</td><td>19,035,75</td><td>10,70</td><td>100,70</td><td>18,85</td><td>33,26</td><td>110,40</td><td>0,13</td><td>168,33</td><td>1,25</td><td>0,03</td><td>19,68</td><td>64,40</td><td>1,58</td><td>2,06</td><td>978,63</td><td>59,27</td><td>34,43</td></tr></tbody></table>
has already left indelible marks on conservation efforts. Countless works have been dedicated to recycling, becoming the catalysts for transformative change.

In the Occitanie region (southern France), anthropogenic activities and the sedimentary dynamics in and around harbors, provides the movement of significant quantities of solid materials and siltation phenomena [1]. In order to maintain and develop harbors activities and sustain the economy of littoral territories, frequent maintenance dredging operations emerged in recent years, and considerable volume of sediments are dredged.

French regulations come to govern the management of dredged marine sediments, consider-
ing them ‘safe’ and possibly to be dumped at sea or ‘contaminated’ and needed to be treated
on land as waste [2]. However, sediments can be considered as valuable resources but they re-
main today lowly reused. This non-reuse can particularly be explained by the lack of available
data on the composition of dredged sediments or the inaccessibility to these data when they are
available.

Before any intervention (dredging, valorization or disposal), the knowledge and the charac-
terization of the geochemical composition of the sediment are necessary. The objective in this
paper was to provide dredged marine sediment samples [3] that represented the diversity of the
wide range of geochemical composition of these materials most commonly considered as waste
and their potential for recovery in a circular economy perspective.

<caption>**Table 2**</caption>

Correlations between each pair of composition parameters (n = 146) (pH: hydrogen potential; Cl: chloride; F: fluoride; SO4: sulphate; Cd: cadmium; Al: aluminum; Cr: chromium; As: arsenic; Cu: copper; Ni: nickel; Pb: lead; Zn: zinc; Hg: mercury; TBT: tributyltin; HAP: polycyclic aromatic hydrocarbons; PCB: polychlorinated biphenyls; Sand: sand content; Mud_2mm: silt content on fraction < 63 µm; Density: bulk density; Total N : total nitrogen; Total P: phosphorus total; DM: dry matter content; OM: organic matter content).

<figure><img src="image_4.png" /></figure>
has already left indelible marks on conservation efforts. Countless works have been dedicated to recycling, becoming the catalysts for transformative change.

In the Occitanie region (southern France), anthropogenic activities and the sedimentary dynamics in and around harbors, provides the movement of significant quantities of solid materials and siltation phenomena [1]. In order to maintain and develop harbors activities and sustain the economy of littoral territories, frequent maintenance dredging operations emerged in recent years, and considerable volume of sediments are dredged.

French regulations come to govern the management of dredged marine sediments, consider-
ing them ‘safe’ and possibly to be dumped at sea or ‘contaminated’ and needed to be treated
on land as waste [2]. However, sediments can be considered as valuable resources but they re-
main today lowly reused. This non-reuse can particularly be explained by the lack of available
data on the composition of dredged sediments or the inaccessibility to these data when they are
available.

Before any intervention (dredging, valorization or disposal), the knowledge and the charac-
terization of the geochemical composition of the sediment are necessary. The objective in this
paper was to provide dredged marine sediment samples [3] that represented the diversity of the
wide range of geochemical composition of these materials most commonly considered as waste
and their potential for recovery in a circular economy perspective.

<caption>**Table 2**</caption>

Correlations between each pair of composition parameters (n = 146) (pH: hydrogen potential; Cl: chloride; F: fluoride; SO4: sulphate; Cd: cadmium; Al: aluminum; Cr: chromium; As: arsenic; Cu: copper; Ni: nickel; Pb: lead; Zn: zinc; Hg: mercury; TBT: tributyltin; HAP: polycyclic aromatic hydrocarbons; PCB: polychlorinated biphenyls; Sand: sand content; Mud_2mm: silt content on fraction < 63 µm; Density: bulk density; Total N : total nitrogen; Total P: phosphorus total; DM: dry matter content; OM: organic matter content).

<figure><img src="image_3.png" /></figure>
### 3. Data Description

This dataset contains tables and figures that describe 23 geochemical composition parameters of 146 marine sediments wastes, sampled between 2010 and 2021 in 10 harbors in the Occitanie region, southern France. Table 1 includes mean values of geochemical composition parameters by type of sediments or harbors. Table 2 shows a correlation matrix between each pair of composition parameters. boxplots of all geochemical composition parameters, representing the variability in composition by type of sediment studied are also presented. Fig. 1 shows boxplots of hydrogen potential (pH), chloride (Cl), fluoride (F), sulphate (SO4), vase content on fraction < 63 µm (Mud_2 mm) and sand content by type of sediment (harbor); Fig. 2 shows boxplots of cadmium (Cd), aluminum (Al), chromium (Cr), arsenic (As), copper (Cu) and nickel (Ni) content; Fig. 3 shows boxplots of lead (Pb), zinc (Zn), mercury (Hg), tributyltin (TBT), polycyclic aromatic hydrocarbons (HAP) and polychlorinated biphenyls (PCB) content; Fig. 4 shows boxplots of total nitrogen (Total_N), phosphorus total (Total_P), dry matter (DM), organic matter (OM) content and bulk density (Density) by type of sediment (harbor). A projection of the dredged marine

<figure><img src="image_5.png" /><figcaption>**Fig. 1.** Boxplots of hydrogen potential (pH), chloride (Cl), fluoride (F), sulphate (SO4), Mud_2 mm (vase content on fraction < 63 µm) and sand content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>
### 3. Data Description

This dataset contains tables and figures that describe 23 geochemical composition parameters of 146 marine sediments wastes, sampled between 2010 and 2021 in 10 harbors in the Occitanie region, southern France. Table 1 includes mean values of geochemical composition parameters by type of sediments or harbors. Table 2 shows a correlation matrix between each pair of composition parameters. boxplots of all geochemical composition parameters, representing the variability in composition by type of sediment studied are also presented. Fig. 1 shows boxplots of hydrogen potential (pH), chloride (Cl), fluoride (F), sulphate (SO4), vase content on fraction < 63 µm (Mud_2 mm) and sand content by type of sediment (harbor); Fig. 2 shows boxplots of cadmium (Cd), aluminum (Al), chromium (Cr), arsenic (As), copper (Cu) and nickel (Ni) content; Fig. 3 shows boxplots of lead (Pb), zinc (Zn), mercury (Hg), tributyltin (TBT), polycyclic aromatic hydrocarbons (HAP) and polychlorinated biphenyls (PCB) content; Fig. 4 shows boxplots of total nitrogen (Total_N), phosphorus total (Total_P), dry matter (DM), organic matter (OM) content and bulk density (Density) by type of sediment (harbor). A projection of the dredged marine

<figure><img src="image_4.png" /><figcaption>**Fig. 1.** Boxplots of hydrogen potential (pH), chloride (Cl), fluoride (F), sulphate (SO4), Mud_2 mm (vase content on fraction < 63 µm) and sand content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>
<figure><img src="image_6.png" /><figcaption>**Fig. 2.** Boxplots of cadmium (Cd), aluminum (Al), chromium (Cr), arsenic (As), copper (Cu) and nickel (Ni) content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

sediments on the plane defined by the first two components of a principal component analysis of the geochemical composition parameters and the relations between some parameters such as organic matter and total nitrogen, chloride and fluoride contents are respectively illustrated in Figs. 5 and 6. The dataset includes the location of the sampling points, sediments type and the geochemical analysis results of the 146 dredged marine sediments sampled. The raw data for parameters collected are available in the repository DOI: 10.57745/CLDJVQ.

# 4. Experimental Design, Materials and Methods

## 4.1. Sample collection and preparation

Sampling has been established to ensure that the collected sediment samples accurately depict the actual characteristics of the dredged sediment and provide informative value. Therefore, each sample was a composite of at least 5 individual samples taken from 3 distinct zones at 3 different depths in the bottom sediments. They were collected by dredging the 50-80 first
<figure><img src="image_5.png" /><figcaption>**Fig. 2.** Boxplots of cadmium (Cd), aluminum (Al), chromium (Cr), arsenic (As), copper (Cu) and nickel (Ni) content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

sediments on the plane defined by the first two components of a principal component analysis of the geochemical composition parameters and the relations between some parameters such as organic matter and total nitrogen, chloride and fluoride contents are respectively illustrated in Figs. 5 and 6. The dataset includes the location of the sampling points, sediments type and the geochemical analysis results of the 146 dredged marine sediments sampled. The raw data for parameters collected are available in the repository DOI: 10.57745/CLDJVQ.

# 4. Experimental Design, Materials and Methods

## 4.1. Sample collection and preparation

Sampling has been established to ensure that the collected sediment samples accurately depict the actual characteristics of the dredged sediment and provide informative value. Therefore, each sample was a composite of at least 5 individual samples taken from 3 distinct zones at 3 different depths in the bottom sediments. They were collected by dredging the 50-80 first
<figure><img src="image_7.png" /><figcaption>**Fig. 3.** Boxplots of lead (Pb), zinc (Zn), mercury (Hg), tributyltin (TBT), polycyclic aromatic hydrocarbons (HAP) and polychlorinated biphenyls (PCB) content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

centimeters of the harbor seabed with a mechanical shovel. The unweathered sediment was immediately put in 50 L opaque containers under a 10 cm layer of sea water to preserve the anoxic conditions. The composite samples were transported to the laboratory in the 24 h following collection, and then stored in a refrigerated room maintained at 4 °C from time of sampling until geochemical analysis and measurement. The conditions adhered to for the conservation of the sediments make it possible to avoid any reactivity of the sediments and to preserve their chemical properties [3].

## 4.2. Geochemical analyses

Particles size distribution and bulk density were determined according to the NF X 31-107 and the NF ISO 11,464 standards respectively [4,5]. The pH measurements were carried out on pore water after extraction with deionized water, using a solid-to-liquid ratio of 1:2 in accordance with standard EN12457-2 [6]. Chloride, fluoride and sulphate contents were analyzed in
<figure><img src="image_6.png" /><figcaption>**Fig. 3.** Boxplots of lead (Pb), zinc (Zn), mercury (Hg), tributyltin (TBT), polycyclic aromatic hydrocarbons (HAP) and polychlorinated biphenyls (PCB) content by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

centimeters of the harbor seabed with a mechanical shovel. The unweathered sediment was immediately put in 50 L opaque containers under a 10 cm layer of sea water to preserve the anoxic conditions. The composite samples were transported to the laboratory in the 24 h following collection, and then stored in a refrigerated room maintained at 4 °C from time of sampling until geochemical analysis and measurement. The conditions adhered to for the conservation of the sediments make it possible to avoid any reactivity of the sediments and to preserve their chemical properties [3].

## 4.2. Geochemical analyses

Particles size distribution and bulk density were determined according to the NF X 31-107 and the NF ISO 11,464 standards respectively [4,5]. The pH measurements were carried out on pore water after extraction with deionized water, using a solid-to-liquid ratio of 1:2 in accordance with standard EN12457-2 [6]. Chloride, fluoride and sulphate contents were analyzed in
<figure><img src="image_8.png" /><figcaption>**Fig. 4.** Boxplots of total nitrogen (Total_N), phosphorus total (Total_P), dry matter (DM), organic matter (OM) content and bulk density (Density) by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

leachate subsamples obtained by homogenizing and fragmenting samples into particles smaller than 2 mm according to the EN12457-2 standard [7]. Trace metals in digested sediment samples were determined using an atomic absorption spectrophotometer according to the NF EN ISO 11 885 standard [8]. The technique described in NF EN ISO 1483 was used for Hg analysis [9]. PAH content is represented by the sum of the 16 most common congeners (naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo [a] anthracene, chrysene, benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene, dibenzo [a,h] anthracene, benzo [g,h,i] perylene, indeno [1,2,3-c,d] pyrene), analyzed by gas chromatography/mass spectrometry after hexane/acetone extraction according to XPX 33-012 standard [10]. The PCB content is represented by the sum of 7 regulatory congeners (PCB 28, 52, 101, 118, 138, 153 and 180) using the same method as for PAHS [10]. The TBT content was also analyzed by low-resolution mass spectrometry according to the NF EN ISO 23161 standard [11]. Dry matter content was measured according to the NF EN 13,040 standard by drying a subsample at a temperature of 103 ± 2 °C [12]. Organic matter content was determined by calcination at 450 ± 25 °C (standard NF EN 13039) [13]. Total N were analyzed in raw subsamples to avoid
<figure><img src="image_7.png" /><figcaption>**Fig. 4.** Boxplots of total nitrogen (Total_N), phosphorus total (Total_P), dry matter (DM), organic matter (OM) content and bulk density (Density) by type of sediment (harbor). (Whiskers represent 1.5 times the interquartile range) (w.w.: wet weight).</figcaption></figure>

leachate subsamples obtained by homogenizing and fragmenting samples into particles smaller than 2 mm according to the EN12457-2 standard [7]. Trace metals in digested sediment samples were determined using an atomic absorption spectrophotometer according to the NF EN ISO 11 885 standard [8]. The technique described in NF EN ISO 1483 was used for Hg analysis [9]. PAH content is represented by the sum of the 16 most common congeners (naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo [a] anthracene, chrysene, benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene, dibenzo [a,h] anthracene, benzo [g,h,i] perylene, indeno [1,2,3-c,d] pyrene), analyzed by gas chromatography/mass spectrometry after hexane/acetone extraction according to XPX 33-012 standard [10]. The PCB content is represented by the sum of 7 regulatory congeners (PCB 28, 52, 101, 118, 138, 153 and 180) using the same method as for PAHS [10]. The TBT content was also analyzed by low-resolution mass spectrometry according to the NF EN ISO 23161 standard [11]. Dry matter content was measured according to the NF EN 13,040 standard by drying a subsample at a temperature of 103 ± 2 °C [12]. Organic matter content was determined by calcination at 450 ± 25 °C (standard NF EN 13039) [13]. Total N were analyzed in raw subsamples to avoid
<figure><img src="image_9.png" /><figcaption>**Fig. 5.** Projection of the 146 dredged marine sediment on the plane defined by the first two components of a principal component analysis of the composition parameters. Samples colored by type of sediment (harbor).</figcaption></figure>

gaseous N losses during drying; subsamples were obtained by homogenizing and fragmenting samples into particles smaller than 2 mm. Total N was measured by the Kjeldahl method according to NF EN 13654-1 [14]. Total N analyses were performed in duplicate. Contents of total phosphorus were determined in a subsample dried at 75 ± 5 °C, according to sample preparation standard NF EN 13040 [15]. The analyses were performed using inductively coupled plasma after extraction with aqua regia, according to NF EN 13650 [16].

### 4.3. Data analyses and visualization

Factor analysis represented by a principal component analysis (PCA) was used to identify how compositional parameters (Table 3) covary in order to discriminate the different harbors according to the sediment composition.

Factor analysis is a set of descriptive statistical methods that allow the maximum amount of information contained in a data table to be presented graphically [17]. This statistical method is adapted to the treatment of mixed data which are relative to a set of individuals described by several groups of variables [18]. PCA is applied to tables that cross-reference rows, representing individuals, with columns representing variables [18]. In this study, the individuals are the sediment samples from the different harbors and the variables are the physicochemical properties, nutrients or chemical contaminants. This was done using the R software R, version: 4.3.2 [17].
<figure><img src="image_8.png" /><figcaption>**Fig. 5.** Projection of the 146 dredged marine sediment on the plane defined by the first two components of a principal component analysis of the composition parameters. Samples colored by type of sediment (harbor).</figcaption></figure>

gaseous N losses during drying; subsamples were obtained by homogenizing and fragmenting samples into particles smaller than 2 mm. Total N was measured by the Kjeldahl method according to NF EN 13654-1 [14]. Total N analyses were performed in duplicate. Contents of total phosphorus were determined in a subsample dried at 75 ± 5 °C, according to sample preparation standard NF EN 13040 [15]. The analyses were performed using inductively coupled plasma after extraction with aqua regia, according to NF EN 13650 [16].

## 4.3. Data analyses and visualization

Factor analysis represented by a principal component analysis (PCA) was used to identify how compositional parameters (Table 3) covary in order to discriminate the different harbors according to the sediment composition.

Factor analysis is a set of descriptive statistical methods that allow the maximum amount of information contained in a data table to be presented graphically [17]. This statistical method is adapted to the treatment of mixed data which are relative to a set of individuals described by several groups of variables [18]. PCA is applied to tables that cross-reference rows, representing individuals, with columns representing variables [18]. In this study, the individuals are the sediment samples from the different harbors and the variables are the physicochemical properties, nutrients or chemical contaminants. This was done using the R software R, version: 4.3.2 [17].
<figure><img src="image_10.png" /><figcaption>**Fig. 6.** Relation between (A) organic matter and total nitrogen content and (B) chloride and fluoride of dredged marine sediments (red lines indicate linear regressions) (w.w.: wet weight).</figcaption></figure>

<table><caption>**Table 3**

List of variables used for PCA according to the content of the dataset (w.w.: wet weight).</caption><thead><tr><th>File name</th><th>Variable name</th><th>Content</th></tr></thead><tbody><tr><td rowspan="15">Geochemical_analysis.csv</td><td>Id_sample</td><td>Sample identification number</td></tr><tr><td>LAT_RGF93</td><td>Latitude of the sampling point</td></tr><tr><td>LONG_RGF93</td><td>Longitude of the sampling point</td></tr><tr><td>Sediment_type</td><td>harbor type</td></tr><tr><td>pH</td><td>hydrogen potential measurements</td></tr><tr><td>Cl</td><td>Chloride content (mg Cl kg<sup>-1</sup> w.w.)</td></tr><tr><td>F</td><td>Fluoride content (mg F kg<sup>-1</sup> w.w.)</td></tr><tr><td>SO4</td><td>Sulphate content (mg SO4 kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cd</td><td>Cadmium content (mg Cd kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cr</td><td>Chromium content (mg Cr kg<sup>-1</sup> w.w.)</td></tr><tr><td>Al</td><td>Aluminium content (mg Al kg<sup>-1</sup> w.w.)</td></tr><tr><td>As</td><td>Arsenic content (mg As kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cu</td><td>Copper content (mg Cu kg<sup>-1</sup> w.w.)</td></tr><tr><td>Ni</td><td>Nickel content (mg Ni kg<sup>-1</sup> w.w.)</td></tr><tr><td>Pb</td><td>Lead content (mg Pb kg<sup>-1</sup> w.w.)</td></tr><tr><td>Zn</td><td>Zinc content (mg Zn kg<sup>-1</sup> w.w.)</td></tr><tr><td>Hg</td><td>Mercury content (mg Hg kg<sup>-1</sup> w.w.)</td></tr><tr><td>TBT</td><td>Tributyltin content (µg TBT kg<sup>-1</sup> w.w.)</td></tr><tr><td>HAP</td><td>Polycyclic aromatic hydrocarbons content (mg HAP kg<sup>-1</sup> w.w.)</td></tr><tr><td>PCB</td><td>Polychlorinated biphenyls content (mg PCB kg<sup>-1</sup> w.w.)</td></tr><tr><td>Sand</td><td>Gravel content (&gt; 2000 µm) (%)</td></tr><tr><td>Mud_2mm</td><td>Vase (fine fraction &lt;63 µm, over &lt;2 mm) content (%)</td></tr><tr><td>Density</td><td>Bulk density (g cm<sup>-3</sup>)</td></tr><tr><td>Total_N</td><td>Total nitrogen content (g N kg<sup>-1</sup> w.w.)</td></tr><tr><td>Total_P</td><td>Total Phosphorus content (mg P2O5 kg<sup>-1</sup> w.w.)</td></tr><tr><td>DM</td><td>Dry matter content (%)</td></tr><tr><td>OM</td><td>Organic Matter content (g kg<sup>-1</sup> w.w.)</td></tr></tbody></table>
<figure><img src="image_9.png" /><figcaption>**Fig. 6.** Relation between (A) organic matter and total nitrogen content and (B) chloride and fluoride of dredged marine sediments (red lines indicate linear regressions) (w.w.: wet weight).</figcaption></figure>

<table><caption>**Table 3**

List of variables used for PCA according to the content of the dataset (w.w.: wet weight).</caption><thead><tr><th>File name</th><th>Variable name</th><th>Content</th></tr></thead><tbody><tr><td rowspan="15">Geochemical_analysis.csv</td><td>Id_sample</td><td>Sample identification number</td></tr><tr><td>LAT_RGF93</td><td>Latitude of the sampling point</td></tr><tr><td>LONG_RGF93</td><td>Longitude of the sampling point</td></tr><tr><td>Sediment_type</td><td>harbor type</td></tr><tr><td>pH</td><td>hydrogen potential measurements</td></tr><tr><td>Cl</td><td>Chloride content (mg Cl kg<sup>-1</sup> w.w.)</td></tr><tr><td>F</td><td>Fluoride content (mg F kg<sup>-1</sup> w.w.)</td></tr><tr><td>SO4</td><td>Sulphate content (mg SO4 kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cd</td><td>Cadmium content (mg Cd kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cr</td><td>Chromium content (mg Cr kg<sup>-1</sup> w.w.)</td></tr><tr><td>Al</td><td>Aluminium content (mg Al kg<sup>-1</sup> w.w.)</td></tr><tr><td>As</td><td>Arsenic content (mg As kg<sup>-1</sup> w.w.)</td></tr><tr><td>Cu</td><td>Copper content (mg Cu kg<sup>-1</sup> w.w.)</td></tr><tr><td>Ni</td><td>Nickel content (mg Ni kg<sup>-1</sup> w.w.)</td></tr><tr><td>Pb</td><td>Lead content (mg Pb kg<sup>-1</sup> w.w.)</td></tr><tr><td>Zn</td><td>Zinc content (mg Zn kg<sup>-1</sup> w.w.)</td></tr><tr><td>Hg</td><td>Mercury content (mg Hg kg<sup>-1</sup> w.w.)</td></tr><tr><td>TBT</td><td>Tributyltin content (µg TBT kg<sup>-1</sup> w.w.)</td></tr><tr><td>HAP</td><td>Polycyclic aromatic hydrocarbons content (mg HAP kg<sup>-1</sup> w.w.)</td></tr><tr><td>PCB</td><td>Polychlorinated biphenyls content (mg PCB kg<sup>-1</sup> w.w.)</td></tr><tr><td>Sand</td><td>Gravel content (&gt; 2000 µm) (%)</td></tr><tr><td>Mud_2mm</td><td>Vase (fine fraction &lt;63 µm, over &lt;2 mm) content (%)</td></tr><tr><td>Density</td><td>Bulk density (g cm<sup>-3</sup>)</td></tr><tr><td>Total_N</td><td>Total nitrogen content (g N kg<sup>-1</sup> w.w.)</td></tr><tr><td>Total_P</td><td>Total Phosphorus content (mg P2O5 kg<sup>-1</sup> w.w.)</td></tr><tr><td>DM</td><td>Dry matter content (%)</td></tr><tr><td>OM</td><td>Organic Matter content (g kg<sup>-1</sup> w.w.)</td></tr></tbody></table>
## Limitations

Not applicable.

## Ethics Statement

The authors have read and follow the ethical requirements for publication in Data in Brief and confirm that the current work does not involve human subjects, animal experiments, or any data collected from social media platforms.

## Data Availability

Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France) (Original data) (Recherche Data Gouv).

## CRediT Author Statement

**Garry Dorleon:** Formal analysis, Conceptualization, Methodology, Writing – original draft, Writing – review & editing, Visualization, Data curation; **Isabelle Techer:** Conceptualization, Methodology, Validation, Investigation, Data curation, Writing – original draft, Visualization, Supervision, Project administration; **Sylvain Rigaud:** Conceptualization, Methodology, Validation, Writing – original draft, Visualization, Supervision, Data curation, Project administration.

## Acknowledgements

The authors wish to thank Stephane Mussard and all the staff of the CHROME laboratory for the encouragement and valuable advice, the technical management of each harbor in the Occitanie region for access to data collection.

## Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

## References

[1] G. Dorleon, S. Rigaud, I. Techer, Management of dredged marine sediments in southern France: main keys to large-scale beneficial re-use, Environ. Sci. Pollut. Res. (2024), doi:10.1007/s11356-024-33129-9.

[2] D. Garry, S. Rigaud, I. Techer, A dataset of the geochemical composition of dredged marine sediments from harbors in southern France, Recherche Data Gouv (2024) https://doi.org/10.57745/CLDJQ.

[3] J. Couvidat, V. Chatain, H. Bouzahzah, M. Benzaazoua, Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering, Sci. Total Environ. 624 (2018) 323-332, doi:10.1016/j.scitotenv.2017.12.130.

[4] AFNORLignes Directrices Pour la Conservation et le Traitement des Échantillons de Boues et de Sédiments, 2009 NF ISO 5667-15. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[5] AFNORQualité Du Sol - Détermination de la Distribution Granulométrique Des Particules du Sol - Méthode à la Pipette, 2003 NF X31-107. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[6] AFNORQualité Du Sol. Prétraitement Des Échantillons Pour Analyses Physico-Chimiques, 2006 NF ISO 11464. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[7] AFNORCaractérisation des Déchets - Lixiviation - Essai de Conformité Pour Lixiviation Des Déchets Fragmentés et des Boues - Partie 2 : Essai En Bâchée, 2002 NF EN12457-2. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).
## Limitations

Not applicable.

## Ethics Statement

The authors have read and follow the ethical requirements for publication in Data in Brief and confirm that the current work does not involve human subjects, animal experiments, or any data collected from social media platforms.

## Data Availability

Geochemical characterization data of harbors dredged sediments in the Occitanie region (southern France) (Original data) (Recherche Data Gouv).

## CRediT Author Statement

**Garry Dorleon:** Formal analysis, Conceptualization, Methodology, Writing – original draft, Writing – review & editing, Visualization, Data curation; **Isabelle Techer:** Conceptualization, Methodology, Validation, Investigation, Data curation, Writing – original draft, Visualization, Supervision, Project administration; **Sylvain Rigaud:** Conceptualization, Methodology, Validation, Writing – original draft, Visualization, Supervision, Data curation, Project administration.

## Acknowledgements

The authors wish to thank Stephane Mussard and all the staff of the CHROME laboratory for the encouragement and valuable advice, the technical management of each harbor in the Occitanie region for access to data collection.

## Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

## References

[1] G. Dorleon, S. Rigaud, I. Techer, Management of dredged marine sediments in southern France: main keys to large-scale beneficial re-use, Environ. Sci. Pollut. Res. (2024), doi:10.1007/s11356-024-33129-9.

[2] D. Garry, S. Rigaud, I. Techer, A dataset of the geochemical composition of dredged marine sediments from harbors in southern France, Recherche Data Gouv (2024) https://doi.org/10.57745/CLDJQ.

[3] J. Couvidat, V. Chatain, H. Bouzahzah, M. Benzaazoua, Characterization of how contaminants arise in a dredged marine sediment and analysis of the effect of natural weathering, Sci. Total Environ. 624 (2018) 323-332, doi:10.1016/j.scitotenv.2017.12.130.

[4] AFNORLignes Directrices Pour la Conservation et le Traitement des Échantillons de Boues et de Sédiments, 2009 NF ISO 5667-15. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[5] AFNORQualité Du Sol - Détermination de la Distribution Granulométrique Des Particules du Sol - Méthode à la Pipette, 2003 NF X31-107. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[6] AFNORQualité Du Sol. Prétraitement Des Échantillons Pour Analyses Physico-Chimiques, 2006 NF ISO 11464. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[7] AFNORCaractérisation des Déchets - Lixiviation - Essai de Conformité Pour Lixiviation Des Déchets Fragmentés et des Boues - Partie 2 : Essai En Bâchée, 2002 NF EN12457-2. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).
[8] AFNORQualité de L'eau - Dosage D'éléments Choisis Par Spectroscopie D'émission Optique Avec Plasma Induit Par Haute Fréquence (ICP-OES), 2007 NF EN ISO 11885. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[9] AFNORQualité de l'eau - Dosage du Mercure, Méthode par Spectrométrie D'absorption Atomique, 2007 NF EN 1483. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[10] AFNORCaractérisation des Boues — Dosage des Hydrocarbures Aromatiques Polycycliques (HAP) et Des Polychlorobiphenylenes (PCB), 2000 XP X 33-012. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[11] AFNORQualité du sol - Dosage d'une Sélection de Composés Organostanniques - Méthode par Chromatographie en Phase Gazeuse, 2011 NF EN ISO 23161. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2017).

[12] AFNORAmendements du Sol et Supports de Culture - Préparation des Échantillons pour Les Essais Physiques et Chimiques, 2000 NF EN 13040. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[13] AFNORAmendements du Sol et Supports De culture - Détermination de la Matière Organique et des Cendres, 2000 NF EN 13039. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[14] AFNORAmendements du Sol et Supports de Culture - Détermination de L'azote - Partie 1 : Méthode de Kjeldahl Modifiée, 2002 NF EN 13654-1. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[15] AFNORAmendements du Sol et Supports de Culture-Détermination des Propriétés Physiques-Masse Volumique Apparente Sèche, Volume D'air, Volume d'eau, Valeur de Rétraction et Porosité Totale, 2000 NF EN 13040. U44-307. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[16] AFNORAmendements du Sol et Supports De Culture - Extraction D'éléments Solubles Dans L'eau Régale, 2002 NF EN 13650. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[17] F. Husson, J. Josse, S. Le, J. Mazet, M.F. Husson, Package "FactoMineR", 2020 https://cran.r-project.org/web/packages/FactoMineR/index.html.

[18] B. Escofier, J. Pagès, Analyses factorielles simples et multiples, Dunod 284 (1998).
[8] AFNORQualité de L'eau - Dosage D'éléments Choisis Par Spectroscopie D'émission Optique Avec Plasma Induit Par Haute Fréquence (ICP-OES), 2007 NF EN ISO 11885. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[9] AFNORQualité de l'eau - Dosage du Mercure, Méthode par Spectrométrie D'absorption Atomique, 2007 NF EN 1483. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[10] AFNORCaractérisation des Boues — Dosage des Hydrocarbures Aromatiques Polycycliques (HAP) et Des Polychlorobiphenylenes (PCB), 2000 XP X 33-012. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[11] AFNORQualité du sol - Dosage d'une Sélection de Composés Organostanniques - Méthode par Chromatographie en Phase Gazeuse, 2011 NF EN ISO 23161. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2017).

[12] AFNORAmendements du Sol et Supports de Culture - Préparation des Échantillons pour Les Essais Physiques et Chimiques, 2000 NF EN 13040. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[13] AFNORAmendements du Sol et Supports De culture - Détermination de la Matière Organique et des Cendres, 2000 NF EN 13039. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[14] AFNORAmendements du Sol et Supports de Culture - Détermination de L'azote - Partie 1 : Méthode de Kjeldahl Modifiée, 2002 NF EN 13654-1. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[15] AFNORAmendements du Sol et Supports de Culture-Détermination des Propriétés Physiques-Masse Volumique Apparente Sèche, Volume D'air, Volume d'eau, Valeur de Rétraction et Porosité Totale, 2000 NF EN 13040. U44-307. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[16] AFNORAmendements du Sol et Supports De Culture - Extraction D'éléments Solubles Dans L'eau Régale, 2002 NF EN 13650. Available online https://www.boutique.afnor.org/normes (Accessed 10 March 2010).

[17] F. Husson, J. Josse, S. Le, J. Mazet, M.F. Husson, Package "FactoMineR", 2020 https://cran.r-project.org/web/packages/FactoMineR/index.html.

[18] B. Escofier, J. Pagès, Analyses factorielles simples et multiples, Dunod 284 (1998).