Date
2020-08-31Subject
540 Chemistry 570 Life sciences; biology PolyfluorverbindungenMACROChemisorptionPerfluoroctansäureSchadstoffaufnahmeAuswaschungMetadata
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Combined leaching and plant uptake simulations of PFOA and PFOS under field conditions
Abstract
Per- and polyfluoroalkyl substances (PFASs) are used in industrial production and manufacturing but were repeatedly detected in agricultural soils and therefore in cash crops in recent years. Dissipation of perfluoroalkyl acids (PFAAs), a sub-group of PFASs, in the environment was rather attributed to the formation of non-extractable residues (NER) than to degradation or transformation. Currently, there are no models describing the fate of PFAAs in the soil-plant continuum under field conditions, which hampers an assessment of potential groundwater and food contamination. Therefore, we tested the ability of the pesticide-leaching model MACRO to simulate the leaching and plant uptake of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in a field lysimeter using two concepts of adsorption: a kinetic two-side sorption concept usually applied for pesticide leaching (scenario I) and the formation of NER (scenario II). The breakthrough of substances could be simulated adequately in scenario II only. Scenario I, however, was not able to reproduce sampled leaching concentrations. Plant uptake was simulated well in the first year after contamination but lacked adequacy in the following years. The model results suggest that more than 90% of PFOA and PFOS are in the pool of NER after 8 years, which is more compared with other studies. However, since NER formation was hypothesized to be a kinetic process and our study used a PFASs leaching time series over a period of 8 years, the results are reasonable. Further research is required on the formation of NER and the uptake of PFAAs into plants in order to gain a better model performance and extend the simulation approach to other PFAAs.
Citation
In: Environmental Science and Pollution Research (ESPR) Volume 28 / Issue 2 (2020-08-31) , S. 2097-2107 ; EISSN 1614-7499Sponsorship
Gefördert im Rahmen des Projekts DEALCitation
@article{doi:10.17170/kobra-202101203005,
author={Gaßmann, Matthias and Weidemann, Eva and Stahl, Thorsten},
title={Combined leaching and plant uptake simulations of PFOA and PFOS under field conditions},
journal={Environmental Science and Pollution Research (ESPR)},
year={2020}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2020$n2020 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/12427 3000 Gaßmann, Matthias 3010 Weidemann, Eva 3010 Stahl, Thorsten 4000 Combined leaching and plant uptake simulations of PFOA and PFOS under field conditions / Gaßmann, Matthias 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/12427=x R 4204 \$dAufsatz 4170 5550 {{Polyfluorverbindungen}} 5550 {{MACRO}} 5550 {{Chemisorption}} 5550 {{Perfluoroctansäure}} 5550 {{Schadstoffaufnahme}} 5550 {{Auswaschung}} 7136 ##0##http://hdl.handle.net/123456789/12427
2021-01-20T15:10:00Z 2021-01-20T15:10:00Z 2020-08-31 doi:10.17170/kobra-202101203005 http://hdl.handle.net/123456789/12427 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ PFASs PFAAs perfluoroalkyl substances MACRO model non-extractable residues irreversible adsorption PFOA PFOS 540 570 Combined leaching and plant uptake simulations of PFOA and PFOS under field conditions Aufsatz Per- and polyfluoroalkyl substances (PFASs) are used in industrial production and manufacturing but were repeatedly detected in agricultural soils and therefore in cash crops in recent years. Dissipation of perfluoroalkyl acids (PFAAs), a sub-group of PFASs, in the environment was rather attributed to the formation of non-extractable residues (NER) than to degradation or transformation. Currently, there are no models describing the fate of PFAAs in the soil-plant continuum under field conditions, which hampers an assessment of potential groundwater and food contamination. Therefore, we tested the ability of the pesticide-leaching model MACRO to simulate the leaching and plant uptake of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in a field lysimeter using two concepts of adsorption: a kinetic two-side sorption concept usually applied for pesticide leaching (scenario I) and the formation of NER (scenario II). The breakthrough of substances could be simulated adequately in scenario II only. Scenario I, however, was not able to reproduce sampled leaching concentrations. Plant uptake was simulated well in the first year after contamination but lacked adequacy in the following years. The model results suggest that more than 90% of PFOA and PFOS are in the pool of NER after 8 years, which is more compared with other studies. However, since NER formation was hypothesized to be a kinetic process and our study used a PFASs leaching time series over a period of 8 years, the results are reasonable. Further research is required on the formation of NER and the uptake of PFAAs into plants in order to gain a better model performance and extend the simulation approach to other PFAAs. open access Gaßmann, Matthias Weidemann, Eva Stahl, Thorsten doi:10.1007/s11356-020-10594-6 Polyfluorverbindungen MACRO Chemisorption Perfluoroctansäure Schadstoffaufnahme Auswaschung publishedVersion EISSN 1614-7499 Issue 2 Environmental Science and Pollution Research (ESPR) 2097-2107 Volume 28 false
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