Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment

Desphenylchloridazon (DPC), the main metabolite of the herbicide chloridazon (CLZ), is more water soluble and persistent than CLZ and frequently detected in water bodies. When assessing DPC transformation in the environment, results can be nonconclusive if based on concentration analysis alone becau...

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Autores: Melsbach, A., Torrentó, Clara, Ponsin, V., Lachat, L., Prasuhn, V., Hofstetter, T.B., Hunkeler, D., Elsner, D.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/161500
Acceso en línea:https://hdl.handle.net/2445/161500
Access Level:acceso abierto
Palabra clave:Degradació dels sòls
Sòls
Nitrogen
Isòtops de carboni
Soil degradation
Soils
Carbon isotopes
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spelling Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter ExperimentMelsbach, A.Torrentó, ClaraPonsin, V.Lachat, L.Prasuhn, V.Hofstetter, T.B.Hunkeler, D.Elsner, D.Degradació dels sòlsSòlsNitrogenIsòtops de carboniSoil degradationSoilsNitrogenCarbon isotopesDesphenylchloridazon (DPC), the main metabolite of the herbicide chloridazon (CLZ), is more water soluble and persistent than CLZ and frequently detected in water bodies. When assessing DPC transformation in the environment, results can be nonconclusive if based on concentration analysis alone because estimates may be confounded by simultaneous DPC formation from CLZ. This study investigated the fate of DPC by combining concentration-based methods with compound-specific C and N stable isotope analysis (CSIA). Additionally, DPC formation and transformation processes were experimentally deconvolved in a dedicated lysimeter study considering three scenarios. First, surface application of DPC enabled studying its degradation in the absence of CLZ. Here, CSIA provided evidence of two distinct DPC transformation processes: one shows significant changes only in 13C/12C, whereas the other involves changes in both 13C/12C and 15N/14N isotope ratios. Second, surface application of CLZ mimicked a realistic field scenario, showing that during DPC formation, 13C/12C ratios of DPC were depleted in 13C relative to CLZ, while 15N/14N ratios remained constant. Finally, CLZ depth injection simulated preferential flow and demonstrated the importance of the topsoil for retaining DPC. The combination of the lysimeter study with CSIA enabled insights into DPC transformation in the field that are superior to those of studies of concentration trends.American Chemical Society2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/161500Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1021/acs.est.9b04606Environmental Science & Technology, 2020, vol. 54, num. 7, p. 3929-3939https://doi.org/10.1021/acs.est.9b04606(c) American Chemical Society , 2020info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1615002026-05-27T06:46:51Z
dc.title.none.fl_str_mv Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
title Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
spellingShingle Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
Melsbach, A.
Degradació dels sòls
Sòls
Nitrogen
Isòtops de carboni
Soil degradation
Soils
Nitrogen
Carbon isotopes
title_short Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
title_full Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
title_fullStr Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
title_full_unstemmed Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
title_sort Dual-Element Isotope Analysis of Desphenylchloridazon to Investigate its Environmental Fate in a Systematic Field Study-A Long-Term Lysimeter Experiment
dc.creator.none.fl_str_mv Melsbach, A.
Torrentó, Clara
Ponsin, V.
Lachat, L.
Prasuhn, V.
Hofstetter, T.B.
Hunkeler, D.
Elsner, D.
author Melsbach, A.
author_facet Melsbach, A.
Torrentó, Clara
Ponsin, V.
Lachat, L.
Prasuhn, V.
Hofstetter, T.B.
Hunkeler, D.
Elsner, D.
author_role author
author2 Torrentó, Clara
Ponsin, V.
Lachat, L.
Prasuhn, V.
Hofstetter, T.B.
Hunkeler, D.
Elsner, D.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Degradació dels sòls
Sòls
Nitrogen
Isòtops de carboni
Soil degradation
Soils
Nitrogen
Carbon isotopes
topic Degradació dels sòls
Sòls
Nitrogen
Isòtops de carboni
Soil degradation
Soils
Nitrogen
Carbon isotopes
description Desphenylchloridazon (DPC), the main metabolite of the herbicide chloridazon (CLZ), is more water soluble and persistent than CLZ and frequently detected in water bodies. When assessing DPC transformation in the environment, results can be nonconclusive if based on concentration analysis alone because estimates may be confounded by simultaneous DPC formation from CLZ. This study investigated the fate of DPC by combining concentration-based methods with compound-specific C and N stable isotope analysis (CSIA). Additionally, DPC formation and transformation processes were experimentally deconvolved in a dedicated lysimeter study considering three scenarios. First, surface application of DPC enabled studying its degradation in the absence of CLZ. Here, CSIA provided evidence of two distinct DPC transformation processes: one shows significant changes only in 13C/12C, whereas the other involves changes in both 13C/12C and 15N/14N isotope ratios. Second, surface application of CLZ mimicked a realistic field scenario, showing that during DPC formation, 13C/12C ratios of DPC were depleted in 13C relative to CLZ, while 15N/14N ratios remained constant. Finally, CLZ depth injection simulated preferential flow and demonstrated the importance of the topsoil for retaining DPC. The combination of the lysimeter study with CSIA enabled insights into DPC transformation in the field that are superior to those of studies of concentration trends.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/161500
url https://hdl.handle.net/2445/161500
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1021/acs.est.9b04606
Environmental Science & Technology, 2020, vol. 54, num. 7, p. 3929-3939
https://doi.org/10.1021/acs.est.9b04606
dc.rights.none.fl_str_mv (c) American Chemical Society , 2020
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Chemical Society , 2020
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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