Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos

The use of organochlorine pesticides in rice growing in Laos is widespread. Potential contamination of pesticides to the aquatic organisms and sediments is a major concern. This study investigates the organochlorine pesticide contamination in fish, mollusks, and sediment from five main fishing areas...

Full description

Saved in:

Bibliographic Details
Main Author:	Boutah, Southavilay
Format:	Thesis
Language:	English
Published:	2004
Subjects:	Organochlorine compounds Aquatic organisms - Effect of water pollution on
Online Access:	http://psasir.upm.edu.my/id/eprint/420/1/549715_FSAS_2004_34.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.420
record_format	uketd_dc
spelling	my-upm-ir.4202015-05-20T08:15:38Z Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos 2004-03 Boutah, Southavilay The use of organochlorine pesticides in rice growing in Laos is widespread. Potential contamination of pesticides to the aquatic organisms and sediments is a major concern. This study investigates the organochlorine pesticide contamination in fish, mollusks, and sediment from five main fishing areas of Vientiane, the capital of Laos. The fishing areas are located within the rice fields around Vientiane. Fifteen species of freshwater fish and one species of mollusks were homogenized, extracted, fractionated and subsequently analysed with Gas Chromatography Mass Spectrometry (GC-MS). Sediment samples were extracted and fractionated and analysed similarly as those of fish and mollusks. The target compounds of interest were lindane, chlordane, dieldrin, DDT and its derivatives. The result of this study shows that DDT, lindane, HCH, chlordane and dieldrin were present in 14 of 15 species of fish and mollusks. DDT, chlordane and dieldrin were present in the samples of sediment. This study also shows that lindane and chlordane has the highest concentrations both in fish and mollusk while DDT and its metabolites reveals next highest concentrations. Results show that highest concentrations of DDT, dieldrin and chlordane were observed in sediments. Results from this study indicate that organochlorine contamination occurs in fish and mollusks. Laotian depends on fish and mollusks for their dietary needs of protein and this is a cause of major concern for potential human health impacts. Furthermore, sedimentary environments where the study were being conducted shows appearance of DDT, dieldrin and chlordane and this would increase the bio-availability of those compounds to the aquatic organisms including fish and mollusks. Although, this study indicate that the levels of pesticides in fish, mollusk and sediment are below the World Health Organization (WHO) standards, the authority should try their best to reduce pesticide contamination in Vientiane, Laos. This study is the first of its kind in Laos and it provides important base-line information for policy makers and monitoring agencies. Organochlorine compounds Aquatic organisms - Effect of water pollution on 2004-03 Thesis http://psasir.upm.edu.my/id/eprint/420/ http://psasir.upm.edu.my/id/eprint/420/1/549715_FSAS_2004_34.pdf application/pdf en public masters Universiti Putra Malaysia Organochlorine compounds Aquatic organisms - Effect of water pollution on Faculty of Environmental Studies
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Organochlorine compounds Aquatic organisms - Effect of water pollution on
spellingShingle	Organochlorine compounds Aquatic organisms - Effect of water pollution on Boutah, Southavilay Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
description	The use of organochlorine pesticides in rice growing in Laos is widespread. Potential contamination of pesticides to the aquatic organisms and sediments is a major concern. This study investigates the organochlorine pesticide contamination in fish, mollusks, and sediment from five main fishing areas of Vientiane, the capital of Laos. The fishing areas are located within the rice fields around Vientiane. Fifteen species of freshwater fish and one species of mollusks were homogenized, extracted, fractionated and subsequently analysed with Gas Chromatography Mass Spectrometry (GC-MS). Sediment samples were extracted and fractionated and analysed similarly as those of fish and mollusks. The target compounds of interest were lindane, chlordane, dieldrin, DDT and its derivatives. The result of this study shows that DDT, lindane, HCH, chlordane and dieldrin were present in 14 of 15 species of fish and mollusks. DDT, chlordane and dieldrin were present in the samples of sediment. This study also shows that lindane and chlordane has the highest concentrations both in fish and mollusk while DDT and its metabolites reveals next highest concentrations. Results show that highest concentrations of DDT, dieldrin and chlordane were observed in sediments. Results from this study indicate that organochlorine contamination occurs in fish and mollusks. Laotian depends on fish and mollusks for their dietary needs of protein and this is a cause of major concern for potential human health impacts. Furthermore, sedimentary environments where the study were being conducted shows appearance of DDT, dieldrin and chlordane and this would increase the bio-availability of those compounds to the aquatic organisms including fish and mollusks. Although, this study indicate that the levels of pesticides in fish, mollusk and sediment are below the World Health Organization (WHO) standards, the authority should try their best to reduce pesticide contamination in Vientiane, Laos. This study is the first of its kind in Laos and it provides important base-line information for policy makers and monitoring agencies.
format	Thesis
qualification_level	Master's degree
author	Boutah, Southavilay
author_facet	Boutah, Southavilay
author_sort	Boutah, Southavilay
title	Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
title_short	Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
title_full	Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
title_fullStr	Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
title_full_unstemmed	Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos
title_sort	comparison of organochlorine pesticide residues in freshwater fish, mollusks and sediments from five main fishing areas in vientiane, laos
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Environmental Studies
publishDate	2004
url	http://psasir.upm.edu.my/id/eprint/420/1/549715_FSAS_2004_34.pdf
_version_	1747810217327853568

Comparison of Organochlorine Pesticide Residues in Freshwater Fish, Mollusks and Sediments from Five Main Fishing Areas in Vientiane, Laos

Similar Items