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

Yang, Ruiqiang; Jiang, Guibin; Zhou, Qunfang; Yuan, Chun-Gang; Shi, Jianbo

doi:10.1016/j.envint.2005.05.027

Cited by 137 publications

(73 citation statements)

References 21 publications

(24 reference statements)

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“…HCH isomers have been identified as a worldwide contaminant (Doong et al 2002). The properties of higher water solubility, vapor pressure, and biodegradability, and lower lipophilicity and particle affinity, of HCH relative to DDT (Yang et al 2005a) could account for the higher concentrations of HCH in sediments. These results were inconsistent with previous observations on OCP residues in freshwater sediments in China due to the difference in physicochemical and biochemical characteristics (Tang et al 2007).…”

Section: Concentrations Of Hch and Ddt In Sedimentsmentioning

confidence: 99%

“…b-HCH is the least water-soluble isomer of HCH, has a higher vapor pressure and octanol/water partitioning coefficient, and is relatively resistant to microbial degradation, which makes it the most stable isomer (Willett et al 1998;Yang et al 2005b). After a long period of weathering, a-and c-HCH can be transformed into b-HCH (Yang et al 2005a). The observation of a greater relative proportion of b-HCH (8% of P HCH) than a-and c-HCH indicated that the HCH was mainly due to historical use (Toan et al 2007) and that technical HCH has not recently been used in this region.…”

Section: Relative Proportions Of Hch and Ddt Components And Possible mentioning

confidence: 99%

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HCH and DDT in Sediments from Marine and Adjacent Riverine Areas of North Bohai Sea, China

Wang

Khim

et al. 2010

Arch Environ Contam Toxicol

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Residues of organochlorine pesticides (OCPs), hexachlorocyclohexanes (HCHs), and dichlorodiphenyltrichloroethanes (DDTs) and their environmental risks in surface sediments collected from marine and adjacent riverine/estuarine areas in the northern Bohai Sea, China, were investigated. Concentrations of RHCH and RDDT in sediments ranged from below detection (\LOD) to 1964.97 ng g -1 dry wt (dw; mean, 92.51 ng g -1 dw) and \LOD to 86.46 ng g -1 dw (mean, 9.23 ng g -1 dw), respectively. Concentrations of HCH and DDT were generally higher in marine than riverine sediments. Concentrations of HCH and DDT residues found in the present study were higher than those reported in marine and river/ estuary sediments from other areas of the world. The source of HCH in sediments could be explained by the large amount of historical use, while DDT seemed to be a combination of erosion of the weathered soils and longrange atmospheric transport. Concentrations of HCH in sediments from the study areas did not exceed sediment quality guidelines (SQGs), with the exception of c-HCH. However, risks posed by concentrations of DDT observed in sediments were found to be moderate to high compared with those posed by consensus-based SQGs. Although the mean sedimentary concentrations of HCH and DDT found in the area of the northern Bohai Sea, China were lower than suggested SQGs in general, their concentrations in some locations were close to or above the SQGs for adverse effects in benthic organisms and, thus, remain a cause for concern.

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Section: Concentrations Of Hch and Ddt In Sedimentsmentioning

confidence: 99%

Section: Relative Proportions Of Hch and Ddt Components And Possible mentioning

confidence: 99%

HCH and DDT in Sediments from Marine and Adjacent Riverine Areas of North Bohai Sea, China

Wang

Khim

et al. 2010

Arch Environ Contam Toxicol

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“…Soil contamination with organochlorine pesticides (OCPs) such as dichlorodiphenyltrichloroethane (DDT), hexachlorocyclohexane (HCH), chlordane, and heptachlor is of great concern due to their toxicity, bioaccumulation, and persistence in the environment (Yang et al 2005). the wide distribution of their residues and their carcinogenic properties.…”

Section: Introductionmentioning

confidence: 99%

Levels and patterns of organochlorine pesticides in agricultural soils in an area of extensive historical cotton cultivation in Henan province, China

Wang

Liu

et al. 2015

Environ Sci Pollut Res

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Organochlorine pesticides (OCPs) have attracted widespread concern because of their environmental persistence and toxicity. The historical influence of different agricultural land use types on soil concentrations of OCP residues was investigated by collecting a total of 52 surface soil samples from long-term cotton fields and fields with other crops in Lvdian township, Henan province, eastern central China. The concentration, composition, and possible sources of 16 OCPs were determined and a health risk assessment of these soils was conducted. Hexachlorocyclohexane (HCH), heptachlor, chlordane, and dichloro diphenyl trichloroethane plus its main metabolites (DDTs) were the most frequently detected OCPs with concentrations of 2.9-56.4 ng g −1 , 4.3-14.0 ng g −1 , 18.0-1254.4 ng g −1 , and below detection limit (BDL) −206.1 ng g −1 , respectively. Analysis of variance of p,p-DDE shows significant (P<0.05) differences while other OCPs show no significant differences between historical cotton fields and fields containing other crops. Compositional analysis suggests that the HCH is derived mainly from the use of lindane and that there are recent inputs. Analysis of variance and compositional analysis indicate that the p,p-DDE in surface soil from long-term cotton fields is derived mainly from the aerobic biodegradation of historical residues. The sum of carcinogenic risk values of OCPs for soil samples were found to be 1.58×10 −6 , posing a low cancer risk to the inhabitants of the region studied.

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“…HCHs are usually used as two formulations. One is technical HCH that is a mixture of 55-80 % a-, 5-14 % b-, 8-15 % c-, and 2-16 % d-isomers (Yang et al 2005). The other is lindane, which contains approximately 99 % of c-HCH (the HCH isomer of highest pesticide activity).…”

Section: Potential Sources Of Pahs and Ocpsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons and organochlorine pesticides in rice hull from a typical e-waste recycling area in southeast China: temporal trend, source, and exposure assessment

Liu

Liao

et al. 2013

Environ Geochem Health

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The residue levels of 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs) and 16 selected organochlorine pesticides (OCPs) in rice and rice hull collected from a typical e-waste recycling area in southeast China were investigated from 2005 to 2007. PAHs and OCPs also were measured in ten mollusk species (soft tissues) collected in an adjacent bay in 2007. Individual PAHs were frequently found in the entire sample set (including the rice, hull, and mollusk samples) with a detection rate of 73 %. The total concentrations of 16 PAHs (RPAHs) and 16 OCPs (ROCPs) were in the range of 40.8-432 ng/g dry weight (mean: 171 ng/g) and 2.35-925 ng/g (122 ng/g), respectively, which were comparable or higher than those reported in some polluted areas. Statistical comparisons suggested that the concentrations of contaminants in hull gradually decreased from 2005 to 2007 and the residue levels were generally in the order of mollusk, hull, and rice, on a dry weight basis. Principal component analysis in combination with diagnostic ratios implied that combustion of coal, wood, and plastic wastes that are closely associated with crude e-waste recycling activities is the main source of PAHs. The finding of decreasing trend of concentrations of PAHs in this area is consistent with the efforts of local authorities to strengthen regulations on illegal e-waste recycling activities. Composition analysis suggested that there is a recent usage or discharge of hexachlorocyclohexane and dichlorodiphenyltrichloroethane into the tested area. The estimated daily intake (EDI) of RPAHs and ROCPs (calculated from mean concentrations) through rice and mollusk consumption was 0.411 and 0.921 lg/kg body weight (bw)/day, respectively.

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

Cited by 137 publications

References 21 publications

HCH and DDT in Sediments from Marine and Adjacent Riverine Areas of North Bohai Sea, China

HCH and DDT in Sediments from Marine and Adjacent Riverine Areas of North Bohai Sea, China

Levels and patterns of organochlorine pesticides in agricultural soils in an area of extensive historical cotton cultivation in Henan province, China

Polycyclic aromatic hydrocarbons and organochlorine pesticides in rice hull from a typical e-waste recycling area in southeast China: temporal trend, source, and exposure assessment

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