# Washing Batch Test of Contaminated Sediment:
## 3 Results
### Sediment Characterization
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Parameter**} & \multirow{2}{*}{**UM**} & \multicolumn{5}{c}{**Initial Unfractionated Sediment**} \\ \cline{3-7}  & & \(\mathbf{S_{1}}\) & \(\mathbf{S_{2}}\) & \(\mathbf{S_{3}}\) & \(\mathbf{S_{4}}\) & **Composite Sample** \\ \hline
**TPH (C12-C40)** & mg kgDW\({}^{-1}\) & 30.030 & 60.600 & 220.000 & 114.020 & 177.830 \\ Ni & mg kgDW\({}^{-1}\) & 65,905.249 & 45,080.000 & 12,540.000 & 21,813.600 & 55,834.000 \\ Cu & mg kgDW\({}^{-1}\) & 54,821.110 & 48,840.000 & 89,740.000 & 116,331.500 & 103,235.400 \\ Zn & mg kgDW\({}^{-1}\) & 78,173.752 & 6672.020 & 204,233.333 & 187,920.000 & 196,075.012 \\ Cr & mg kgDW\({}^{-1}\) & 118,149.867 & 78,040.001 & 21,780.000 & 101,211.200 & 109,680.500 \\ Hg & mg kgDW\({}^{-1}\) & 83.002 & 11.000 & 1.550 & 45.290 & 27.500 \\ \hline \multicolumn{7}{c}{**Sediment Fraction < 63 \(\mathbf{\mu}\)m**} \\ \hline
**Parameter** & **UM** & \(\mathbf{S_{1}}\) & \(\mathbf{S_{2}}\) & \(\mathbf{S_{3}}\) & \(\mathbf{S_{4}}\) & **Composite Sample** \\ \hline
**TPH (C12-C40)** & mg kgDW\({}^{-1}\) & 30.760 & 70.020 & 420.000 & 172.210 & 250.000 \\ Ni & mg kgDW\({}^{-1}\) & 69,983.966 & 47,767.000 & 12,000.000 & 25,020.900 & 58,491.983 \\ Cu & mg kgDW\({}^{-1}\) & 57,327.293 & 51,010.000 & 82,000.000 & 134,370.100 & 129,500.000 \\ Zn & mg kgDW\({}^{-1}\) & 81,927.991 & 944.400 & 230,043.313 & 258,080.000 & 245,665.670 \\ Cr & mg kgDW\({}^{-1}\) & 125,293.333 & 82,070.000 & 18,000.008 & 140,843.200 & 133,065.000 \\ Hg & mg kgDW\({}^{-1}\) & 6.067 & 5.730 & 8.100 & 32.001 & 15.007 \\ \hline \multicolumn{7}{c}{**Sediment Fraction < 63 Micron**} \\ \hline
**TPH (C12-C40)** & mg kgDW\({}^{-1}\) & 10.000 & 10.430 & 330.000 & 40.000 & 40.230 \\ Ni & mg kgDW\({}^{-1}\) & 19,205.000 & 31,200.000 & 15,205.080 & 15,209.800 & 17,222.700 \\ Cu & mg kgDW\({}^{-1}\) & 25,920.400 & 3400.000 & 125,316.030 & 77,948.300 & 80,141.200 \\ Zn & mg kgDW\({}^{-1}\) & 35,317.000 & 49,400.200 & 71,782.901 & 38,825.600 & 55,397.700 \\ Cr & mg kgDW\({}^{-1}\) & 36,273.200 & 48,803.800 & 39,100.000 & 17,539.000 & 26,653.000 \\ Hg & mg kgDW\({}^{-1}\) & 95.176 & 11.000 & 1.000 & 13.481 & 8.228 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Sediment characterization in the sample of the first survey campaign. Figure 1: Results of the characterization conducted during the first survey campaign at different sampling points (S\({}_{1}\)–S\({}_{4}\), section of the sample). The analyses to determine the concentrations of metals and TPH in the sediment were carried out only on the sediment fraction greater than 63 \(\upmu\)m and the sediment fraction less than 63 \(\upmu\)m. In particular, the results showed high values of Ni and Cu (although lower than in the first campaign) and absence of metals Zn and Hg compared to the previous campaign. Furthermore, Pb was found in these samples. Finally, a high TPH contamination equal to 9500.028 mg kg\({}_{\mathrm{DW}}\)\({}^{-1}\) and 17,800.002 mg kg\({}_{\mathrm{DW}}\)\({}^{-1}\) were found, respectively, for the sediment fraction greater than 63 \(\upmu\)m and the sediment fraction less than 63 \(\upmu\)m.  
The results obtained from the characterization shows that:  
* \"inorganic\" contamination is concentrated in the fine fraction; and
* in the case of oil pollution, the splitting operation shows a balanced distribution of TPH in both the fine and coarse matrices, with a tendency to concentrate in the fraction less than 63 micrometers. In summary, the second campaign made it possible to establish a useful study matrix for assessments of decontamination tests aimed at analyzing organic and inorganic pollution.