Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites

This study investigates the longitudinal and temporal trends of atrazine, a persistent herbicide, in the Mae Sa catchment in northern Thailand. Concentrations of atrazine determined from targeted analysis were elevated during the wet season, and great variability was observed in relation to individu...

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Main Authors: Lee, Theodora Hui Yian, Ziegler, Alan D., Li, Caixia, Srinuansom, Khajornkiat, Snyder, Shane Allen
Other Authors: Nanyang Environment and Water Research Institute
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180842
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1808422024-10-29T06:13:40Z Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites Lee, Theodora Hui Yian Ziegler, Alan D. Li, Caixia Srinuansom, Khajornkiat Snyder, Shane Allen Nanyang Environment and Water Research Institute Earth and Environmental Sciences Herbicide Pesticide This study investigates the longitudinal and temporal trends of atrazine, a persistent herbicide, in the Mae Sa catchment in northern Thailand. Concentrations of atrazine determined from targeted analysis were elevated during the wet season, and great variability was observed in relation to individual storm runoff hydrographs. When compared to regulatory limits, the observed atrazine concentrations in Mae Sa were generally below environmental thresholds of concern. However, greater risk may occur in other tributary systems feeding the Ping River, where some concentrations exceeding 2000 ng/L were observed, although they were not sustained for extended periods of time. Additionally, nontargeted screening identified 16 other agrochemicals with known potential environmental risks or associated toxicity. Despite the minor risk posed by atrazine alone, the research highlights the intricate interplay of agricultural practices, diverse pesticide application, and hydroclimatic factors in influencing pesticide dynamics. In the broader context, this study underscores the challenge of estimating risks arising from pesticide mixtures while using a combination of targeted analysis, nontargeted screening, in silico prediction models, and in vitro bioassays. Collectively, we find evidence of the presence of more than 100 pesticides in the catchment since dedicated work began there more than a decade ago. Nanyang Technological University National Research Foundation (NRF) Public Utilities Board (PUB) This work is funded by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS)(Water) Centre of Excellence (CoE) program, awarded to Nanyang Environmental & Water Research Institute(NEWRI), Nanyang Technological University, Singapore(NTU), and also supported by the Lien Environmental Fellowship Programme. This research is also supported by the Interdisciplinary Graduate Program (IGP), NTU, as well as the Faculty of Fisheries Technology & Aquatic Resources, Mae Jo University, Chiang Mai, Thailand. Authors acknowledge and are thankful to Agilent Technologies for support through a research collaboration agreement (RCA-2019-0349). 2024-10-29T06:13:40Z 2024-10-29T06:13:40Z 2024 Journal Article Lee, T. H. Y., Ziegler, A. D., Li, C., Srinuansom, K. & Snyder, S. A. (2024). Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites. ACS ES&T Water, 4(9), 3758-3772. https://dx.doi.org/10.1021/acsestwater.3c00764 2690-0637 https://hdl.handle.net/10356/180842 10.1021/acsestwater.3c00764 2-s2.0-85200358278 9 4 3758 3772 en RCA-2019-0349 ACS ES&T Water © 2024 American Chemical Society. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Earth and Environmental Sciences
Herbicide
Pesticide
spellingShingle Earth and Environmental Sciences
Herbicide
Pesticide
Lee, Theodora Hui Yian
Ziegler, Alan D.
Li, Caixia
Srinuansom, Khajornkiat
Snyder, Shane Allen
Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
description This study investigates the longitudinal and temporal trends of atrazine, a persistent herbicide, in the Mae Sa catchment in northern Thailand. Concentrations of atrazine determined from targeted analysis were elevated during the wet season, and great variability was observed in relation to individual storm runoff hydrographs. When compared to regulatory limits, the observed atrazine concentrations in Mae Sa were generally below environmental thresholds of concern. However, greater risk may occur in other tributary systems feeding the Ping River, where some concentrations exceeding 2000 ng/L were observed, although they were not sustained for extended periods of time. Additionally, nontargeted screening identified 16 other agrochemicals with known potential environmental risks or associated toxicity. Despite the minor risk posed by atrazine alone, the research highlights the intricate interplay of agricultural practices, diverse pesticide application, and hydroclimatic factors in influencing pesticide dynamics. In the broader context, this study underscores the challenge of estimating risks arising from pesticide mixtures while using a combination of targeted analysis, nontargeted screening, in silico prediction models, and in vitro bioassays. Collectively, we find evidence of the presence of more than 100 pesticides in the catchment since dedicated work began there more than a decade ago.
author2 Nanyang Environment and Water Research Institute
author_facet Nanyang Environment and Water Research Institute
Lee, Theodora Hui Yian
Ziegler, Alan D.
Li, Caixia
Srinuansom, Khajornkiat
Snyder, Shane Allen
format Article
author Lee, Theodora Hui Yian
Ziegler, Alan D.
Li, Caixia
Srinuansom, Khajornkiat
Snyder, Shane Allen
author_sort Lee, Theodora Hui Yian
title Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
title_short Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
title_full Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
title_fullStr Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
title_full_unstemmed Riverine pesticides in an agricultural catchment in northern Thailand: with focus on atrazine and metabolites
title_sort riverine pesticides in an agricultural catchment in northern thailand: with focus on atrazine and metabolites
publishDate 2024
url https://hdl.handle.net/10356/180842
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