Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand
The most natural waterways in Thailand are utilized for conventional agricultures, e.g. irrigation and wastewater discharge. Concentrations of 20 organochlorine pesticides (OCPs) were measured in surface sediments collected from the tributaries of the Mae Klong river during 2003-2005. The sampling s...
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th-mahidol.192302018-07-12T09:27:20Z Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand T. Poolpak P. Pokethitiyook M. Kruatrachue U. Arjarasirikoon N. Thanwaniwat Mahidol University Environmental Science The most natural waterways in Thailand are utilized for conventional agricultures, e.g. irrigation and wastewater discharge. Concentrations of 20 organochlorine pesticides (OCPs) were measured in surface sediments collected from the tributaries of the Mae Klong river during 2003-2005. The sampling sites chosen were nearby the rice paddy which organochlorine pesticides were intensively used for crop cultivation. Solid-liquid extraction technique was used for sediment extraction, and gas chromatography with electron capture detector was applied for pesticides determination. Total concentrations of OCPs found were ranged from 4.12 to 214.91 μg g-1dw in the first year. In the second year, total residue concentrations in the surface sediments were in the range of 3.26-215.09 μg g-1dw. Concentrations of pesticides were greater in dry-season rice cultivation period in both sampling years, and heptachlor epoxide was the contaminant found at highest concentration in this study. In addition, the occurrence of some selected contaminants including DDT, DDD and DDE reflects the recent contamination in the study area. This demonstrates not only that the natural waterway was polluted and contained much pesticide residues, but it also illustrates the necessity of a continuous long-term monitoring of the affected environment. © 2007 Elsevier B.V. All rights reserved. 2018-07-12T02:27:20Z 2018-07-12T02:27:20Z 2008-08-15 Article Journal of Hazardous Materials. Vol.156, No.1-3 (2008), 230-239 10.1016/j.jhazmat.2007.12.078 03043894 2-s2.0-44949216697 https://repository.li.mahidol.ac.th/handle/123456789/19230 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=44949216697&origin=inward |
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Environmental Science T. Poolpak P. Pokethitiyook M. Kruatrachue U. Arjarasirikoon N. Thanwaniwat Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
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The most natural waterways in Thailand are utilized for conventional agricultures, e.g. irrigation and wastewater discharge. Concentrations of 20 organochlorine pesticides (OCPs) were measured in surface sediments collected from the tributaries of the Mae Klong river during 2003-2005. The sampling sites chosen were nearby the rice paddy which organochlorine pesticides were intensively used for crop cultivation. Solid-liquid extraction technique was used for sediment extraction, and gas chromatography with electron capture detector was applied for pesticides determination. Total concentrations of OCPs found were ranged from 4.12 to 214.91 μg g-1dw in the first year. In the second year, total residue concentrations in the surface sediments were in the range of 3.26-215.09 μg g-1dw. Concentrations of pesticides were greater in dry-season rice cultivation period in both sampling years, and heptachlor epoxide was the contaminant found at highest concentration in this study. In addition, the occurrence of some selected contaminants including DDT, DDD and DDE reflects the recent contamination in the study area. This demonstrates not only that the natural waterway was polluted and contained much pesticide residues, but it also illustrates the necessity of a continuous long-term monitoring of the affected environment. © 2007 Elsevier B.V. All rights reserved. |
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Mahidol University |
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Mahidol University T. Poolpak P. Pokethitiyook M. Kruatrachue U. Arjarasirikoon N. Thanwaniwat |
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Article |
author |
T. Poolpak P. Pokethitiyook M. Kruatrachue U. Arjarasirikoon N. Thanwaniwat |
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T. Poolpak |
title |
Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
title_short |
Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
title_full |
Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
title_fullStr |
Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
title_full_unstemmed |
Residue analysis of organochlorine pesticides in the Mae Klong river of Central Thailand |
title_sort |
residue analysis of organochlorine pesticides in the mae klong river of central thailand |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/19230 |
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1763495360161906688 |