The concentration and distribution of organochlorine pesticides in the air from the karst cave, South China

Wang, Yinghui; Guo, Songjun; Xu, Yiyin; Wang, Weisheng; Qi, Shihua; Xing, Xinli; Yuan, Daoxian

doi:10.1007/s10653-011-9441-z

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…This is unexpected because the agricultural use of technical DDT was banned in 1983, and its exception use for vector-control was also banned in 2009 in China [ 52 ]. The fresh input of technical DDT was also found in the air from a karst cave in Guilin [ 59 ], and in the soil from Chongqing, southwestern China [ 32 ]. Results herein implied the illegal use of technical DDT, and therefore insufficient pesticide management in the study area [ 60 ].…”

Section: Resultsmentioning

confidence: 99%

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Chen

Zeng

Liu

et al. 2021

IJERPH

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Excessive reclamation and improper use of agrochemicals in karst areas leads to serious non-point source pollution, which is of great concern and needs to be controlled, since contaminants can easily pollute groundwater due to the thin patchy soil and developed karst structures. The occurrences of organochlorine pesticides (OCPs) in karst soil were investigated by analyzing 25 OCPs in the karst soils near the Three Gorges Dam, China. The total concentrations of OCPs ranged 161–43,100 (6410 ± 9620) pg/g, with the most abundant compounds being p,p’-DDT and mirex. The concentration differences between the orchard and vegetable field and between upstream and downstream presented the influences of land-use type and water transport on the OCP spatial distributions. Composition analysis indicated the possible fresh inputs of lindane, technical DDT, aldrin, endrin, mirex, and methoxychlor. Their illegal uses implied an insufficient agrochemical management system in undeveloped karst areas. Principal component analysis with multiple linear regression analysis characterized the dominant sources from current agricultural use and current veterinary use in the study area. OCPs in the soils might not pose significant cancer risk for the residents, but they need to be controlled due to their illegal uses and bioaccumulation effect via the food chain.

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Section: Resultsmentioning

confidence: 99%

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Chen

Zeng

Liu

et al. 2021

IJERPH

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“…Wang et al investigated the concentration and distribution of OCPs in air from the Kast cave (Dayan cave) in Guilin and showed that OCPs were detected in the air from the Dayan cave despite of the cave's relatively closed space. 11 Zhang et al investigated the distribution and sources of OCPs in the surface sediments of Lijiang River and showed that the contamination of OCPs in the sediments was at a medium level compared to the other studied rivers, and the sources of hexachlorocyclohexane and dichlorodiphenyltrichloroethane are long-term migration and historical usage. 12 In our previous study, the agricultural sewage carrying OCPs flows into the ponds around Qingshitan Reservoir and finally reaches the reservoir through the streams.…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of an organochlorine pesticide mixture in the surface waters of Qingshitan Reservoir in Southwest China

Zeng

Liang

et al. 2018

RSC Adv.

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HCHs and DDTs in Yellow River of Henan section—a typical agricultural area in China: levels, distributions and risks

Feng

Zhang

et al. 2015

Environ Geochem Health

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The levels, potential sources and ecological risks of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in Yellow River of Henan section, a typical agricultural area in China, were investigated. Surface water samples and suspended particulate matters (SPMs) were collected from 23 sites during two seasons. In wet season, the residues of ∑HCHs (α-HCH, β-HCH, γ-HCH and δ-HCH) and ∑DDTs (p,p'-DDT, o,p'-DDT, p,p'-DDE, p,p'-DDD) ranged from 41.7 to 290 and 4.42 to 269 ng/L in surface water, while those varied from 0.86 to 157 and 1.79 to 96.1 ng/g dw in SPM, respectively. Moreover, in surface water, the levels of HCHs and DDTs in wet season were much higher than those in dry season. The reverse was true for residues of HCHs and DDTs in SPM. Compared with the large rivers in other regions, the levels of HCHs and DDTs in the studied area ranked at high levels and the residual concentrations might cause adverse biological risk, especially for ∑HCHs during wet season. Distributions of HCHs and DDTs delineated that the input of tributaries made a significant effect on the residue of HCHs and DDTs in the mainstream. ∑HCHs in surface water were consist of 26.7 % α-HCH, 30.0 % β-HCH, 37.9 % γ-HCH and 5.45 % δ-HCH and those in SPM contained 5.16 % α-HCH, 22.1 % β-HCH, 60.5 % γ-HCH and 12.2 % δ-HCH on average. Combined with ratios of α-HCH/γ-HCH in surface water (0.70) and in SPM (0.09), the results strongly indicated that lindane was recently used or discharged in the studied area. The mean percentage of DDTs' isomers were 28.7 % p,p'-DDT, 29.8 % o,p'-DDT, 28.1 % p,p'-DDE and 13.4 % p,p'-DDD in surface water, while those were 12.5 % p,p'-DDT, 31.8 % o,p'-DDT, 30.5 % p,p'-DDE and 25.1 % p,p'-DDD in SPM. The ratios of (DDE + DDD)/∑DDTs and o,p'-DDT/p,p'-DDT revealed that the DDTs in the studied area mainly derived from long-term weathering of technical DDTs residue and the input of dicofol.

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The concentration and distribution of organochlorine pesticides in the air from the karst cave, South China

Cited by 7 publications

References 30 publications

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Risk assessment of an organochlorine pesticide mixture in the surface waters of Qingshitan Reservoir in Southwest China

HCHs and DDTs in Yellow River of Henan section—a typical agricultural area in China: levels, distributions and risks

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