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...
Saved in:
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2024
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/180842 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-180842 |
---|---|
record_format |
dspace |
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 |
_version_ |
1814777764519084032 |