Polychlorinated biphenyl congeners and organochlorine insecticides in the water column and sediments of Daya Bay, China

Zhou, John L.; Maskaoui, Khalid; Qiu, Yue; Hong, Huasheng; Wang, Z.D.

doi:10.1016/s0269-7491(00)00180-9

Cited by 237 publications

(94 citation statements)

References 22 publications

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“…Concentrations of AHCH in sediments samples were much lower than those of ADDT. This trend is consistent with the previous observations on the contamination of OCPs in sediments in China (Ma et al, 2001;Zhou et al, 2001). There is no quantitative information to prove that the amount of technical HCH used was smaller than that of DDT.…”

Section: Residue Levels Of Hch and Ddt In Sedimentssupporting

confidence: 90%

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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

137

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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: Residue Levels Of Hch and Ddt In Sedimentssupporting

confidence: 90%

“…In aquatic environment, these compounds can enter marine and freshwater ecosystems through effluents release, atmospheric deposition, runoff, and other means (Zhou et al, 2001). Because of the low water solubility, OCPs have a strong affinity for particulate matters.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Jiang

Zhou

et al. 2005

Environment International

137

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“…This level is comparable to or is lower than that in many other countries (Iwata et al, 1994). Levels of PCBs concentrations in surface water are determined to range from 91-1353 ng/l (Zhou et al, 2001). The range of PCBs concentrations in marine organisms is 83-615 ng/g (Fang et al, 2001).…”

Section: Polychlorinated Biphenyls (Pcbs)mentioning

confidence: 76%

“…An air migration process may take place and the air particulate may be originated from agricultural soils containing high levels of DDTs. Levels of DDTs and HCHs concentrations in surface water are determined to be 27-976 ng/l and 36-1,229 ng/l, respectively (Zhou et al, 2001). The ranges of DDTs and HCHs concentrations in marine organisms are 9-191 ng/g and 0-1 ng/g, respectively (Fang et al, 2001).…”

Section: Organochlorine Pesticidesmentioning

confidence: 99%

“…It will serve as an assessment of the current status, distribution, severity, fate, and environmental consequence of detected contaminants, thus furnishing possible insight as well as future directions for global and strategic environmental management of the region. Table 1 shows a summary of concentrations of various POPs in different carrying media of Pearl River delta from existing literature (Cheng et al, 2000;Fang et al, 2001;Fu et al, 2001;Hong et al, 1999;Kang et al, 2000;Mai et al, 2001;Wu et al, 1999;Yuan et al, 2001;Zheng et al, 2001;Zhou et al, 2001). Owing to the apparent significance of sediment phase in the fate and transport of contaminants, previous research efforts have mainly been focused on surficial sediments in assessing the pollution of water bodies.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of transboundary POP contamination in aquatic ecosystems of Pearl River delta

Chau

2005

Marine Pollution Bulletin

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During the past two decades, the rapid development of the Pearl River delta leads to substantial accumulation of various toxic organic compounds. This study aims to give a preliminary characterization of the existing state of contamination in this region and to provide insight into the possible fate of persistent organic pollutants (POPs) in this estuary. The available data on POPs in water, river, estuarine sediments, soil, and marine organisms within the Pearl River Delta are compiled. It is shown that it may lead to transboundary POP pollution problems at both Hong Kong and Macau Special Administration Regions located at the downstream end of the region. It is noted that the levels of DDTs and HCHs in various environmental media are at alerting levels and that fresh DDT might still be applied illegally within the region. A systematic research is required to determine both the temporal and spatial variations of all POPs in various carrying media of the Pearl River delta as a whole.

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Profiles and Risk Assessment of Organochlorine Pesticides in Three Gorges Reservoir, China

Yang

Liu

Yun

et al. 2017

CLEAN Soil Air Water

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The environmental pollution of the Three Gorges Reservoir in China may not be desirable and has adverse effects on biodiversity and human health in this region. Concentrations of 16 organochlorine pesticides (OCPs) were investigated in 19 surface water samples collected from near dam region of the Three Gorges Reservoir. The concentrations of total OCPs ranged from 14 to 88 ng L−1 with a geometric mean of 23 ng L−1. The spatial distribution of OCPs concentrations indicated the giant reservoir was sink of OCPs for upstream as well as source for downstream. The mean concentrations of total hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) were 10 and 9.7 ng L−1, respectively. Historical use of lindane and DDT was found to be the primary source of HCHs and DDTs. The ratio between heptachlor and its metabolic products indicated new input of heptachlor occurred in this region. Among the 16 detected OCPs, the cancer risks for human of heptachlor and heptachlor‐epoxide were all above 10−4, indicating a potential threat of the two OCPs to human health.

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Polychlorinated biphenyl congeners and organochlorine insecticides in the water column and sediments of Daya Bay, China

Cited by 237 publications

References 22 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

Characterization of transboundary POP contamination in aquatic ecosystems of Pearl River delta

Profiles and Risk Assessment of Organochlorine Pesticides in Three Gorges Reservoir, China

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