Distribution and fate of organochlorine pesticide residues in sediments from the selected rivers in Taiwan

Doong, Ruey‐an; Sun, Yuh‐Chang; Liao, Pei-Ling; Peng, Ching-Kai; Wu, Shang-Chuen

doi:10.1016/s0045-6535(02)00066-8

Cited by 199 publications

(108 citation statements)

References 17 publications

(23 reference statements)

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“…In China, the commonly used HCHs were technical mixtures containing a-, h-, g-, and y-isomers of 55 -80%, 5 -14%, 8 -15%, and 2 -16%, respectively. Therefore, the predominant of aisomer in some environmental samples reflected the recent use of technical HCH (Doong et al, 2002). In this study, h-HCH was the predominant composition and existed in most of the sediments.…”

Section: Compositions Of Hch and Ddtmentioning

confidence: 58%

“…After long time aging, a-and g-HCH could be transformed into h-HCH (Willett et al, 1998;Walker, 1999). DDT can be biodegraded to DDE under aerobic condition and to DDD under anaerobic condition, the relative concentration of the parent DDT compound and its metabolites, DDD and DDE, can be used as indicative indices for assessing the possible pollution sources (Doong et al, 2002). DDT compositions in this study significantly varied with different sampling sites.…”

Section: Compositions Of Hch and Ddtmentioning

confidence: 78%

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Occurrence and distribution of organochlorine pesticides (HCH and DDT) in sediments collected from East China Sea

Yang

Jiang

Zhou

et al. 2005

Environment International

136

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Sediments used in this study were collected from different depths of eight sites in East China Sea in November 2002. The levels and distribution patterns of the selected organochlorine pesticides (OCPs = p,pV-DDT, o,pV-DDT, p,pV-DDE, p,pV-DDD, a-, h-, g-and y-HCH) in samples were investigated by the technique of sonication extraction followed by the analysis of gas chromatography (GC) coupled with a micro-electron capture detector (AECD). The concentrations of AHCH and ADDT in the surface sediments were in the range of < 0.05 -1.45 ng/g (mean 0.76 ng/g), < 0.06 -6.04 ng/g (mean 3.05 ng/g) based on dry weight (dw), respectively. In the vertical distributions, the AHCH and ADDT were in the range of < 0.05 -2.52 ng/g, < 0.06 -10.94 ng/g dw, respectively. Residues of OCPs varied significantly with different sampling sites. ADDT in the surface sediments was correlated well with total organic carbon (TOC) content (r 2 = 0.71), while AHCH showed no obvious correlation. The distribution showed that the sediments from the vicinity estuary or near shore had higher TOC contents, and higher OCPs concentrations. The contamination record indicated an extensive use of OCPs in the catchments from Yangtze River in the past might greatly affect the OCP residues. D

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Section: Compositions Of Hch and Ddtmentioning

confidence: 58%

Section: Compositions Of Hch and Ddtmentioning

confidence: 78%

Occurrence and distribution of organochlorine pesticides (HCH and DDT) in sediments collected from East China Sea

Yang

Jiang

Zhou

et al. 2005

Environment International

136

View full text Add to dashboard Cite

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“…Among the HCH isomers, a-HCH is more likely to partition the air and be transported for long distances. Since a-HCH exhibits the most carcinogenic activity among HCH isomers, the contamination levels detected may pose a high ecotoxicity for aquatic organisms (Doong et al 2002). Metolachlor, deltamethrin, trifluralin, nitrofen, and acetochlor were the pesticides most frequently found in water and sediments from GTR.…”

Section: Possible Sources Of Pesticides In Guanting Reservoirmentioning

confidence: 99%

Composition, Distribution, and Characterization of Suspected Endocrine-Disrupting Pesticides in Beijing GuanTing Reservoir (GTR)

Xue

2006

Arch Environ Contam Toxicol

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Abstract. GuanTing Reservoir (GTR) is one of two main water resources for the agriculture, industry, and living uses of Beijing (China). As a result of extensive pollution over the last few decades (particularly the 1980s), the reservoir has not supplied potable water to Beijing city since 1997. Composition, distribution, and characterization of 31 suspected endocrine-disrupting pesticides in surface water, pore water, and surface sediments from the reservoir are reported in this study. An analytical procedure based on solid-phase extraction (SPE) technology and capillary gas chromatography with electroncapture detection has been developed for the simultaneous determination of the 31 suspected endocrine-disrupting pesticides including the compounds hexachlorocyclohexane, cyclodiene, diphenyl aliphatic, chlordane, and other selected pesticides (hexachlorobenzene, heptachlor, endrin aldehyde, hepachlor epoxide, dicofol, acetochlor, alachlor, metolachlor, chlorpyriphos, nitrofen, trifluralin, cypermethrin, fenvalerate, and deltamethrin). The result shows that the pesticide pollution is moderate in GTR and its tributaries, although pesticide residue values in a few sites are quite high when considering their endocrine-disrupting effects and chronic health effects. Among the analyzed pesticides, p,p¢-DDE, o,p¢-DDT, b-HCH, endosulfan sulfate, and aldrin were the most abundant pesticides in water while o,p¢-DOT, d-HCH, b-HCH, p,p¢-DDE, p,p¢-DDT, and endosulfan sulfate were the most abundant in sediment. The variation in concentration of pesticides among sites can be expected to be caused by several factors such as contaminants in the rivers and drainage of contaminated water from the surrounding agricultural fields.

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“…Consequently, bottom sediments often become reservoirs of pesticides in the environment (Khan, 1977;Chau and Afgan, 1982). Therefore, the investigation of distribution of endocrine disrupting pesticides in water and sediment can provide a valuable record of contamination in aquatic environments (Doong et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Some surveys of pesticide contamination in water have reported in coastal and estuarine sediments collected from Asian countries such as Vietnam, Turkey, Korea and China (Hong et al, 1999;Khim et al, 1999;Nhan et al, 1999;Doong et al, 2002;Bakan and Ariman, 2004;Zhang et al, 2004) indicating the presence of significant source of pesticides in these regions. China is the worldÕs second largest producer of pesticides, and a pesticide production of 260 000 tonnes was recorded in 1994 (Zhang et al, 2002a).…”

Section: Introductionmentioning

confidence: 99%

Screening 31 endocrine-disrupting pesticides in water and surface sediment samples from Beijing Guanting reservoir

2005

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For screening 31 potential or suspected endocrine-disrupting pesticides in water and surface sediments, a multiresidue analysis method based on gas chromatography with electron capture detection (GC/ECD) was developed. Solid phase extraction (SPE) technology with Oasis Ò HLB cartridge was also applied in sample extraction. The relevant mean recoveries were 70-103% and 71-103% for water and sediment, respectively. Relative standard deviations (RSD) are 2.0-7.0%, 4.0-8.0% for water and sediment, respectively. Thirty one pesticides (a-HCH, b-HCH, c-HCH, d-HCH, hexachlorobenzene (HCB), aldrin, heptachlor, endosulfan I & II, p,p 0 -DDD, o,p 0 -DDT, p,p 0 -DDT, p,p 0 -DDE, endrin aldehyde, endosulfan sulphate, methoxychlor, hepachlor epoxide, a-chlordane, c-chlordane, dieldrin, endrin, dicofol, acetochlor, alachlor, metolachlor, chlorpyriphos, nitrofen, trifluralin, cypermethrin, fenvalerate, deltamethrin) in water and surface sediment samples from Beijing Guanting reservoir were analyzed. Concentrations of pesticides ranged from 7.59 to 36.0 ng g À1 on a dry wt. basis for sediment samples, from 279.3 to 2740 ng l À1 for pore waters and from 48.8 to 890 ng l À1 for water samples, respectively, with a mean concentration of 10.7 ng g À1 in sediment, 735 ng l À1 in pore water and 295 ng l À1 in water, respectively. The data obtained provides information on the levels and sources of endocrine-disrupting pesticides in Guanting reservoir. These results underscore the need to improved environmental protection measures in order to reduce the exposure of the population and aquatic biota to these endocrine-disrupting compounds.

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Distribution and fate of organochlorine pesticide residues in sediments from the selected rivers in Taiwan

Cited by 199 publications

References 17 publications

Occurrence and distribution of organochlorine pesticides (HCH and DDT) in sediments collected from East China Sea

Occurrence and distribution of organochlorine pesticides (HCH and DDT) in sediments collected from East China Sea

Composition, Distribution, and Characterization of Suspected Endocrine-Disrupting Pesticides in Beijing GuanTing Reservoir (GTR)

Screening 31 endocrine-disrupting pesticides in water and surface sediment samples from Beijing Guanting reservoir

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