cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15161/oar.it/77156
title: The study of PM2.5 and PM2.5-10 characterisation in Nigeria Cities using Ion beam analytical technique (Metadata RADIATE TA Proposal 21002408-ST)

description: Proposal title "The study of PM2.5 and PM2.5-10 characterisation in Nigeria Cities using Ion beam analytical technique". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory, from 18 till 22 March 2022, on 5 May 2022 and from 17 till 18 April 2023. Hands-off mode.

About 511 samples of particulate matter (254 of PM2.5 and 257 of PM2.5-10 fractions) deposited on a Teflon and polycarbonate nuclepore filters (47 mm in diameter with pore size, 0.8 μm and 0.4 μm respectively) were collected from 2019 to 2022 from six different monitoring stations in Lagos city. Nigeria, being the most populated country in Africa, faces huge challenges of air pollution.

The samples were measured by PIXE technique with a proton beam of 3 MeV energy and a few tens nA to determine their elemental compositions. In particular, elemental concentrations of major elements such as Na, Mg, Al, Si, S, Cl, K, Ca, Fe, Zn and Pb which are mostly fingerprint elements of soil dust, sea spray, biomass burning and industrial emissions stood out for both fractions across Lagos city.
DOI: 10.15161/oar.it/77157
title: The study of PM2.5 and PM2.5-10 characterisation in Nigeria Cities using Ion beam analytical technique (Metadata RADIATE TA Proposal 21002408-ST)

description: Proposal title "The study of PM2.5 and PM2.5-10 characterisation in Nigeria Cities using Ion beam analytical technique". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory, from 18 till 22 March 2022, on 5 May 2022 and from 17 till 18 April 2023. Hands-off mode.

About 511 samples of particulate matter (254 of PM2.5 and 257 of PM2.5-10 fractions) deposited on a Teflon and polycarbonate nuclepore filters (47 mm in diameter with pore size, 0.8 μm and 0.4 μm respectively) were collected from 2019 to 2022 from six different monitoring stations in Lagos city. Nigeria, being the most populated country in Africa, faces huge challenges of air pollution.

The samples were measured by PIXE technique with a proton beam of 3 MeV energy and a few tens nA to determine their elemental compositions. In particular, elemental concentrations of major elements such as Na, Mg, Al, Si, S, Cl, K, Ca, Fe, Zn and Pb which are mostly fingerprint elements of soil dust, sea spray, biomass burning and industrial emissions stood out for both fractions across Lagos city.
DOI: 10.15468/dl.ymkawn
title: Occurrence Download

description: A dataset containing 8 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Schleinitzia megaladenia (Merr.) P.Guinet & I.C.Nielsen"
 ]
}

 The dataset includes 8 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0103485-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mnpdpk
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Schismatoglottis cadierei Buchet & Gagnep. ex S.Y.Wong & P.C.Boyce"
 ]
}

 The dataset includes 3 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0103486-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15161/oar.it/77164
title: Analysis of elemental concentrations of particle matter samples collected in a hyperarid environment in Namibia (Metadata RADIATE TA Proposal 23003138-ST)

description: Proposal title "Analysis of elemental concentrations of particle matter samples collected in a hyperarid environment in Namibia". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory), from 19 till 21 April 2023. Hands-off mode.

A sampling campaign was carried out in April 2022 at the Gobabeb Namib Research Institute (GNRI; https://gobabeb.org/), in the Namib Desert of Namibia (-23.55 S, 15.03 E). Aerosol samples were collected for a three-week period on polytetrafluoroethylene filters (PTFE; Whatman; 47 mm in diameter, 2.0 μm pore size) both on the PM1 and PM10 fractions using homemade filter samplers from certified Leckel sampling heads (Sven Leckel, Germany).

<br>
The main objective is to measure the elemental composition of these samples by PIXE to evaluate for the first time (1) the source apportionment and relative contribution of the mineral dust and advected marine aerosols to the total aerosol mass; (2) the total<br>
concentrations of elements possibly soluble in water (sulfur, iron, phosphorous) forming clouds and/or contributing to ocean productivity. Complementary measurements with ion chromatography and ICP are performed at LISA.

40 PM10 and 40 PM1 samples (including blanks) were analysed by PIXE, obtaining the concentrations of all elements with Z&gt;10. In particular all main elements of interest (Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Mn, Fe, Cu and Zn) were detected. A set of elemental standards were analyzed as well for quality assurance purposes and to check the accuracy of quantitative results.

<br>
A 2.7 MeV proton beam was used. This energy was chosen to minimise the gamma ray emission from F in the collecting membranes, i.e. avoiding strong resonances in the 19F(p,p'γ)19F inelastic reactions (110 e 197 keV gamma-rays), that will increase the continuous background in the PIXE spectra in the energy region &gt; 10 keV, increase pile-up and dead-time effects. This was particularly important for this experiment as the PTFE membranes used in this project are indeed quite thick. To identify the best working energy we<br>
used literature data (Zamboni et al. NIM B 342, 2015, 266), and also measured Fluorine gamma-ray yield over a limited proton energy range of interest.<br>
DOI: 10.15161/oar.it/77165
title: Analysis of elemental concentrations of particle matter samples collected in a hyperarid environment in Namibia (Metadata RADIATE TA Proposal 23003138-ST)

description: Proposal title "Analysis of elemental concentrations of particle matter samples collected in a hyperarid environment in Namibia". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory), from 19 till 21 April 2023. Hands-off mode.

A sampling campaign was carried out in April 2022 at the Gobabeb Namib Research Institute (GNRI; https://gobabeb.org/), in the Namib Desert of Namibia (-23.55 S, 15.03 E). Aerosol samples were collected for a three-week period on polytetrafluoroethylene filters (PTFE; Whatman; 47 mm in diameter, 2.0 μm pore size) both on the PM1 and PM10 fractions using homemade filter samplers from certified Leckel sampling heads (Sven Leckel, Germany).

<br>
The main objective is to measure the elemental composition of these samples by PIXE to evaluate for the first time (1) the source apportionment and relative contribution of the mineral dust and advected marine aerosols to the total aerosol mass; (2) the total<br>
concentrations of elements possibly soluble in water (sulfur, iron, phosphorous) forming clouds and/or contributing to ocean productivity. Complementary measurements with ion chromatography and ICP are performed at LISA.

40 PM10 and 40 PM1 samples (including blanks) were analysed by PIXE, obtaining the concentrations of all elements with Z&gt;10. In particular all main elements of interest (Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Mn, Fe, Cu and Zn) were detected. A set of elemental standards were analyzed as well for quality assurance purposes and to check the accuracy of quantitative results.

<br>
A 2.7 MeV proton beam was used. This energy was chosen to minimise the gamma ray emission from F in the collecting membranes, i.e. avoiding strong resonances in the 19F(p,p'γ)19F inelastic reactions (110 e 197 keV gamma-rays), that will increase the continuous background in the PIXE spectra in the energy region &gt; 10 keV, increase pile-up and dead-time effects. This was particularly important for this experiment as the PTFE membranes used in this project are indeed quite thick. To identify the best working energy we<br>
used literature data (Zamboni et al. NIM B 342, 2015, 266), and also measured Fluorine gamma-ray yield over a limited proton energy range of interest.<br>
DOI: 10.15161/oar.it/77160
title: Quantification of mineral dust (MD) contribution to Arctic aerosol, analysis of samples collected at the Zeppelin Observatory (Metadata RADIATE TA Proposal 22002905-ST)

description: Proposal title "Quantification of mineral dust (MD) contribution to Arctic aerosol, analysis of samples collected at the Zeppelin Observatory". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory), from 7 till 7 March 2023. Hands-on mode.

Aerosols interfere with the polar energy balance directly, by absorbing or scattering radiation, and indirectly by affecting cloud formation and properties, and is a function of the aerosol physical, optical, and chemical properties. Aeolian mineral dust (MD) can be a significant contributor to the Arctic aerosol and has a warming effect by absorbing radiation, as well as it decreases the surface albedo when deposited on snow and ice and enhance smelting (of snow and ice). MD particles may also be efficient scatterers of sunlight and thus can have a cooling effect. MD in the Arctic atmosphere can both be long-range transported (LRT) and originate from intrinsic sources. Atmospheric MD concentrations is commonly estimated by analysing a selection of trace elements associated with MD, such as Silicon (Si), Aluminium (Al), Iron (Fe), Manganese (Mn), and Titanium (Ti); various element ratios can serve as fingerprints and aid in separating MD of local origin vs. LRT MD, e.g., from Eurasia

The main objective of this work is to evaluate NILU’s analytical method, used in monitoring of Arctic aerosol, for trace elements associated with Mineral Dust (Al, Fe, Mn, and Ti) by comparing it with PIXE, and hence NILU's assessment of the Arctic Mineral Dust concentration.

Ambient aerosol filters samples were collected at the Arctic Zeppelin Observatory during the years 2017-2018-2019-2020. The filter samples typically have a low loading, although Mineral Dust episodes occur. Aerosol was collected on Whatman 41 filters (150 mm diameter) with a sampling time of 48 hours, providing an air volume of 2100 m3. The particle fraction collected is PM3. 47 mm diameter punches were provided. The filters have already been analyzed for Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb, using ICP-MS.

Ambient aerosol samples collected on quartz fibre filters (one week sampling time) were also selected for periods with high aerosol concentrations and analysed for the more heavie elements (heavier than Ca).

A total of about 165 samples (about 115 on Whatman and 50 on quartz filters) were analysed by PIXE using a 3 MeV proton beam. Aerosol samples collected on quartz fibre filters were also analysed by PIGE (Particle-Induced Gamma-ray Emission) for the quantification of Al. A set of elemental standards and an aerosol reference standard (NIST 2783) were analysed as well for quality assurance purposes and to check the accuracy of quantitative results.
DOI: 10.15161/oar.it/77161
title: Quantification of mineral dust (MD) contribution to Arctic aerosol, analysis of samples collected at the Zeppelin Observatory (Metadata RADIATE TA Proposal 22002905-ST)

description: Proposal title "Quantification of mineral dust (MD) contribution to Arctic aerosol, analysis of samples collected at the Zeppelin Observatory". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory), from 7 till 7 March 2023. Hands-on mode.

Aerosols interfere with the polar energy balance directly, by absorbing or scattering radiation, and indirectly by affecting cloud formation and properties, and is a function of the aerosol physical, optical, and chemical properties. Aeolian mineral dust (MD) can be a significant contributor to the Arctic aerosol and has a warming effect by absorbing radiation, as well as it decreases the surface albedo when deposited on snow and ice and enhance smelting (of snow and ice). MD particles may also be efficient scatterers of sunlight and thus can have a cooling effect. MD in the Arctic atmosphere can both be long-range transported (LRT) and originate from intrinsic sources. Atmospheric MD concentrations is commonly estimated by analysing a selection of trace elements associated with MD, such as Silicon (Si), Aluminium (Al), Iron (Fe), Manganese (Mn), and Titanium (Ti); various element ratios can serve as fingerprints and aid in separating MD of local origin vs. LRT MD, e.g., from Eurasia

The main objective of this work is to evaluate NILU’s analytical method, used in monitoring of Arctic aerosol, for trace elements associated with Mineral Dust (Al, Fe, Mn, and Ti) by comparing it with PIXE, and hence NILU's assessment of the Arctic Mineral Dust concentration.

Ambient aerosol filters samples were collected at the Arctic Zeppelin Observatory during the years 2017-2018-2019-2020. The filter samples typically have a low loading, although Mineral Dust episodes occur. Aerosol was collected on Whatman 41 filters (150 mm diameter) with a sampling time of 48 hours, providing an air volume of 2100 m3. The particle fraction collected is PM3. 47 mm diameter punches were provided. The filters have already been analyzed for Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb, using ICP-MS.

Ambient aerosol samples collected on quartz fibre filters (one week sampling time) were also selected for periods with high aerosol concentrations and analysed for the more heavie elements (heavier than Ca).

A total of about 165 samples (about 115 on Whatman and 50 on quartz filters) were analysed by PIXE using a 3 MeV proton beam. Aerosol samples collected on quartz fibre filters were also analysed by PIGE (Particle-Induced Gamma-ray Emission) for the quantification of Al. A set of elemental standards and an aerosol reference standard (NIST 2783) were analysed as well for quality assurance purposes and to check the accuracy of quantitative results.
DOI: 10.15161/oar.it/77162
title: Elemental analysis of high time resolution PM2.5 samples collected in an urban background site (Metadata RADIATE TA Proposal 21002673-ST)

description: Proposal title "Elemental analysis of high time resolution PM2.5 samples collected in an urban background site". Measurements carried out at the external beam set-up for atmospheric aerosol analysis  of the INFN LABEC accelerator laboratory, from 15 till 19 May 2023. Hands-on mode.

Source apportionment (SA) studies are applied to quantify the effect of individual sources of air pollutant on the ambient concentration through receptor modelling. The classical approach in these studies is based upon the collections and chemical characterization of 24h samples. Even though this methodology has proven to be very effective, it cannot provide information on the diurnal patterns of source contributions due to its low time resolution. In addition, the database on city source apportionment is not well documented in numerous Eastern European cities.

The main objective of the experiment was to determine the elemental composition of particulate matter (PM) samples collected with high time resolution (2 hours) to characterize and identify the local and regional sources, and to compare their contribution to the local ambient pollution level in different seasons in Debrecen, Hungary. The city of Debrecen, with approximately 220,000 inhabitants, is situated in the eastern part of Hungary. It has a mixed-fired power plant, an airport and it is surrounded by agricultural areas. Based on previous studies, the main sources of pollution were identified in the city.<br>
Sixteen sampling campaigns including a COVID-19 lockdown period have been carried out since August, 2018. The sampling location in ATOMKI is an urban background site close to the downtown of Debrecen. For the sampling campaigns, a two-stage sequential Streaker sampler was used to study the quasi-hourly evolution of atmospheric aerosol concentration. The sampling device collected two different size fractions, the fine fraction (PM2.5) and the coarse fraction (PM10-2.5), separately with a time resolution of 2 h.

<br>
The quantity of collected particulate matter in each sample is small and as a result very difficult to analyse using traditional chemical techniques. The PIXE technique is suitable for measuring this kind of filters. Siixteen PM2.5 streaker filters (each one composed by 74 aerosol “spots”), were analysed with an extracted proton beam of 2.7 MeV (energy on target), for a total of about 1200 aerosol 2h-samples. A set of elemental standards and an aerosol reference standard (NIST 2783) were analyzed as well for quality assurance purposes and to check the accuracy of quantitative results.
DOI: 10.15161/oar.it/77163
title: Elemental analysis of high time resolution PM2.5 samples collected in an urban background site (Metadata RADIATE TA Proposal 21002673-ST)

description: Proposal title "Elemental analysis of high time resolution PM2.5 samples collected in an urban background site". Measurements carried out at the external beam set-up for atmospheric aerosol analysis  of the INFN LABEC accelerator laboratory, from 15 till 19 May 2023. Hands-on mode.

Source apportionment (SA) studies are applied to quantify the effect of individual sources of air pollutant on the ambient concentration through receptor modelling. The classical approach in these studies is based upon the collections and chemical characterization of 24h samples. Even though this methodology has proven to be very effective, it cannot provide information on the diurnal patterns of source contributions due to its low time resolution. In addition, the database on city source apportionment is not well documented in numerous Eastern European cities.

The main objective of the experiment was to determine the elemental composition of particulate matter (PM) samples collected with high time resolution (2 hours) to characterize and identify the local and regional sources, and to compare their contribution to the local ambient pollution level in different seasons in Debrecen, Hungary. The city of Debrecen, with approximately 220,000 inhabitants, is situated in the eastern part of Hungary. It has a mixed-fired power plant, an airport and it is surrounded by agricultural areas. Based on previous studies, the main sources of pollution were identified in the city.<br>
Sixteen sampling campaigns including a COVID-19 lockdown period have been carried out since August, 2018. The sampling location in ATOMKI is an urban background site close to the downtown of Debrecen. For the sampling campaigns, a two-stage sequential Streaker sampler was used to study the quasi-hourly evolution of atmospheric aerosol concentration. The sampling device collected two different size fractions, the fine fraction (PM2.5) and the coarse fraction (PM10-2.5), separately with a time resolution of 2 h.

<br>
The quantity of collected particulate matter in each sample is small and as a result very difficult to analyse using traditional chemical techniques. The PIXE technique is suitable for measuring this kind of filters. Siixteen PM2.5 streaker filters (each one composed by 74 aerosol “spots”), were analysed with an extracted proton beam of 2.7 MeV (energy on target), for a total of about 1200 aerosol 2h-samples. A set of elemental standards and an aerosol reference standard (NIST 2783) were analyzed as well for quality assurance purposes and to check the accuracy of quantitative results.
DOI: 10.15161/oar.it/77158
title: Analysis of PM10-bound elements for an inland city in Portugal (Metadata RADIATE TA Proposal 21002436-ST)

description: Proposal title "Analysis of PM10-bound elements for an inland city in Portugal". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory, from 1 till 3 September 2021. Hands-off mode.

From January to March 2021, an exhaustive air quality monitoring program was carried out in Braganza, Portugal. Measurements included continuous monitoring of several gaseous pollutants by automatic monitors (NO<sub>x</sub>, CO, PM10, PM2.5, benzene, toluene, xylene, SO<sub>2</sub>, O<sub>3</sub>), meteorological variables (wind speed and direction, precipitation, temperature, relative humidity), and the daytime and nighttime collection of PM10 onto different filters media (quartz fibre and Teflon).

About 150 samples of PM10 atmospheric aerosol sampled and collected on Teflon filters (47 mm in diameter, 2.0 μm pore size, from<br>
Pall) were analyzed by PIXE technique using an extracted proton beam of 3.0 MeV (energy on target) to determine the elemental composition. A set of elemental standards and an aerosol reference standard (NIST 2783) were analysed as well for quality assurance purposes and to check the accuracy of quantitative results.
DOI: 10.15161/oar.it/77159
title: Analysis of PM10-bound elements for an inland city in Portugal (Metadata RADIATE TA Proposal 21002436-ST)

description: Proposal title "Analysis of PM10-bound elements for an inland city in Portugal". Measurements carried out at the external beam set-up for atmospheric aerosol analysis of the INFN LABEC accelerator laboratory, from 1 till 3 September 2021. Hands-off mode.

From January to March 2021, an exhaustive air quality monitoring program was carried out in Braganza, Portugal. Measurements included continuous monitoring of several gaseous pollutants by automatic monitors (NO<sub>x</sub>, CO, PM10, PM2.5, benzene, toluene, xylene, SO<sub>2</sub>, O<sub>3</sub>), meteorological variables (wind speed and direction, precipitation, temperature, relative humidity), and the daytime and nighttime collection of PM10 onto different filters media (quartz fibre and Teflon).

About 150 samples of PM10 atmospheric aerosol sampled and collected on Teflon filters (47 mm in diameter, 2.0 μm pore size, from<br>
Pall) were analyzed by PIXE technique using an extracted proton beam of 3.0 MeV (energy on target) to determine the elemental composition. A set of elemental standards and an aerosol reference standard (NIST 2783) were analysed as well for quality assurance purposes and to check the accuracy of quantitative results.