Classification and ordination of DDT and HCH in soil samples from the Guanting Reservoir, China

Zhang, Hong; Lü, Yonglong; Dawson, R.; Shi, Yunfeng; Wang, Tieyu

doi:10.1016/j.chemosphere.2005.04.023

Cited by 76 publications

(35 citation statements)

References 9 publications

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“…1), and comparable to previously reported values [7,16,21,27,28]. Few reports exist on the occurrence of HCHs in rain water.…”

Section: Levels Of Ocps In the Fwcfp Ecosystemsupporting

confidence: 76%

Input pathways of organochlorine pesticides to typical freshwater cultured fish ponds of South China: Hints for pollution control

Zhang¹,

Yu²,

You³

et al. 2011

Enviro Toxic and Chemistry

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Abstract-Air, rain, pond water, bank soil, pond sediment, fish feed, and fish were sampled from four freshwater cultured fish ponds (FWCFPs) in rural areas within the Pearl River Delta (PRD) of South China. Compositional analyses indicated that historical residues were the main sources of DDXs (defined as the sum of dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethane (DDD), and dichlorodiphenyldichloroethylene (DDE) and 1-chloro-2,2-bis(4-chlorophenyl)ethane (p,p 0 -DDMU)), and hexachlorocyclohexanes (HCHs) in the FWCFPs. The input fluxes to the FWCFPs were estimated at 4.0, 1.6, 15, and À0.92 mg/m Áyear for HCHs in Shunde, respectively. These results indicated that fish feed was the dominant input source of DDXs to the FWCFPs. As for HCHs, fluxes via dry deposition and feeding were similar and slightly higher than those via wet deposition. Biological effects due to the occurrence of DDXs in the FWCFPs were minimal, and consumption of freshwater fish from the PRD appeared to pose insignificant risk to human health based on some existing regulations and guidelines. Environ.

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“…1), and comparable to previously reported values [7,16,21,27,28]. Few reports exist on the occurrence of HCHs in rain water.…”

Section: Levels Of Ocps In the Fwcfp Ecosystemsupporting

confidence: 76%

Input pathways of organochlorine pesticides to typical freshwater cultured fish ponds of South China: Hints for pollution control

Zhang¹,

Yu²,

You³

et al. 2011

Enviro Toxic and Chemistry

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“…HCH soil concentrations reported elsewhere in the literature are listed in Table 3. In comparison with other areas of China, the median value (1.768 ng g À1 ) was slightly higher than that in soils from the Guanting Reservoir, which is located in an exturb of Beijing with fewer anthropogenic activities (median: 0.56 ng g À1 , Zhang et al, 2005). However, the geometric mean was 2-8 times lower than that in soils from the urban and suburban areas of Beijing determined via a systematic grid sampling method (geometric mean: 5.7 ng g À1 , Li et al, 2006) and that in agricultural soils from greenhouses in suburban areas of Beijing (15.77 ± 6.0 ng g À1 , Ma et al, 2003).…”

Section: Hchsmentioning

confidence: 99%

Contamination of soils with organochlorine pesticides in urban parks in Beijing, China

Wang

et al. 2008

Chemosphere

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Urban parks are an integral component of healthy urban living. Since they are frequently visited, an understanding of the environmental quality of these urban facilities is crucial. Here, a study was conducted on the contamination of soils in the parks of Beijing. Organochlorine pesticides (OCPs), which have the potential to cause endocrine disturbances, were considered study objectives. Hexachlorocyclohexanes (HCHs) were found at concentrations of 0.2490-197.0 ng g À1 and dichlorodiphenyltrichloroethanes (DDTs) were found at concentrations of 5.942-1039 ng g À1 in the soils investigated. The preliminary pollution assessment indicated that DDTs have caused high pollution levels in the soils of some parks. Analysis of the sources of contamination showed that HCHs in the soils were derived from an old mixed source of technical HCHs and lindane and that DDTs, which were suspected to have recent application to the soils at some sites, were derived mainly from a mixture of technical DDTs and dicofol containing DDT impurities. An independent sample t-test proved that pesticides containing DDTs had been used in large amounts in the soils of parks before 1983 (p < 0.05) and that the levels of DDTs in the soils of parks administered by the Beijing municipal government were significantly higher than the levels in those administered by the district government (p < 0.05). However, the main difference in this situation needs to be further studied. This study suggested that open spaces like urban parks were not as sound as was expected and that there was potential for exposure of visitors/ workers in the parks to organochlorine pesticides.

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“…Spatial variability and temporal investigations of OCP concentrations in various environments are useful in developing a better understanding of OCPs behavior in different ecosystems and in predicting their future impact on environmental and human health (Hung et al 2005). Although in previous studies OCP concentrations have been measured in different soils from different regions of Beijing Wang et al 2005a;Zhang et al 2005;Zhu et al 2005;Li et al 2008), and the spatial variability of concentrations of HCH and DDT has been analyzed (Li et al 2005;Zhang et al 2007), studies of temporal trends of HCH and DDT in soils have been limited.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in agricultural areas around watersheds where OCPs were applied in large amounts, monitoring of OCP residues continues. As part of this monitoring program, integrated and systemic studies of concentrations of various organic and inorganic pollutants have been conducted (Wang et al 2005b;Zhang et al 2005;Luo et al 2007). These studies have assessed health risks for the local population who have been living in the neighborhood of the reservoir since 2003.…”

Section: Introductionmentioning

confidence: 99%

Spatial variability and temporal trends of HCH and DDT in soils around Beijing Guanting Reservoir, China

Lü

Wang

et al. 2010

Environ Geochem Health

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Spatial variability and temporal trends in concentrations of the organochlorine pesticides (OCPs), hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethane (DDT), in surface soils around Beijing Guanting Reservoir (GTR) were studied in 2003 and 2007. Concentrations of the two OCPs in soils around GTR were generally less than reference values set by the Chinese government for the protection of agricultural production and human health. Among the OCPs, b-HCH and p, p 0 -DDE were the two predominant compounds. This result indicates that the HCH and DDT residues in soils were primarily from historical use. Based on kriging, a spatial distribution of HCH and DDT around the GTR was observed. Spatial variability indicated how HCH and DDT had been applied and been distributed in the past. Between 2003 and 2007, concentrations of HCH and DDT decreased more rapidly in orchard soils than those in fallow soils.

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Classification and ordination of DDT and HCH in soil samples from the Guanting Reservoir, China

Cited by 76 publications

References 9 publications

Input pathways of organochlorine pesticides to typical freshwater cultured fish ponds of South China: Hints for pollution control

Input pathways of organochlorine pesticides to typical freshwater cultured fish ponds of South China: Hints for pollution control

Contamination of soils with organochlorine pesticides in urban parks in Beijing, China

Spatial variability and temporal trends of HCH and DDT in soils around Beijing Guanting Reservoir, China

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