Rapid transport of organochlorine pesticides (OCPs) in multimedia environment from karst area

Huang, Huanfang; Liu, Huafeng; Xiong, Shuai; Zeng, Faming; Bu, Jianwei; Zhang, Biao; Liu, Wei; Zhou, Hong; Qi, Shihua; Li, Xu; Chen, Wei

doi:10.1016/j.scitotenv.2021.145698

Cited by 34 publications

(17 citation statements)

References 78 publications

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“…Thus, it is expected that the ratio of TC/CC is less than 1.56 in the natural environment, and it represents the historical residue of technical chlordane; otherwise, it is a recent input or due to other sources. In the Danshui River, the ratios were all less than 1.4 (Figure 3c), indicating the historical residue of technical chlordane, which was similar to the results from the karst spring systems [43] and in the soils [38] near the Three Gorges Dam.…”

Section: Potential Source Analysis Of Ocpssupporting

confidence: 73%

Distribution and Potential Sources of OCPs and PAHs in Waters from the Danshui River Basin in Yichang, China

Chen

Peng

Huang

et al. 2021

IJERPH

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To investigate the concentrations, spatial distribution, potential sources and mass fluxes of organochlorine pesticides (OCPs) and polycyclic aromatic hydrocarbons (PAHs) in waters from the Danshui River Basin, a total of 20 water samples were collected and analyzed from a karstic river in Western Hubei of Central China. The average concentrations of total OCPs and PAHs in the river water were 4719 pg·L−1 and 26.2 ng·L−1, respectively. The characteristic ratios of different isomers and the composition analysis of individual OCPs and PAHs revealed that HCHs originated from a mixed input of technical HCHs and Lindane, DDTs were mainly from technical DDTs, and PAHs mainly originated from biomass and coal combustion. The mass flux analysis showed that PAHs had a higher emission and heavier burden than OCPs in the Danshui River Basin. OCPs and PAHs emitted from agricultural or other human activities could enter the groundwater and then be transported to the surface/river water in the karst area. The adsorption of OCPs and PAHs by particles and the sedimentation of particles could be the primary processes to intercept these pollutants in the water of the karstic river system.

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Section: Potential Source Analysis Of Ocpssupporting

confidence: 73%

Distribution and Potential Sources of OCPs and PAHs in Waters from the Danshui River Basin in Yichang, China

Chen

Peng

Huang

et al. 2021

IJERPH

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“…This accumulation suggests that toxic effects can occur in organisms and areas farther away from the contaminated area 11. The rate of biological and chemical decomposition of these compounds is very low, and they are easily absorbed by soil and sediments, which can be a source of pollution for humans in the long run 10…”

Section: Introductionmentioning

confidence: 99%

Organochlorine Pesticides, Oxidative Stress Biomarkers, and Leukemia: A Case-Control Study

Rafeeinia

Asadikaram

Karimi-Darabi

et al. 2022

Journal of Investigative Medicine

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Exposure to pesticides has been linked to an elevated risk of leukemia. The present research aimed to evaluate the relationship between organochlorine (OC) pesticides and biomarkers of oxidative stress in patients with leukemia. This work was conducted on 109 patients with leukemia and 109 healthy controls. The serum concentrations of seven derivatives of OCs including alpha-hexachlorocyclohexane (HCH), beta-HCH, gamma-HCH, 2,4-dichlorodiphenyltrichloroethane (DDT), 4,4-DDT, 2,4-dichlorodiphenyldichloroethylene (DDE), and 4,4-DDE along with acetylcholinesterase (AChE), glutathione peroxidase (GPx), superoxide dismutase (SOD), paraoxonase-1 (PON1), and catalase (CAT) activities as well as total antioxidant capacity (TAC), nitric oxide (NO), protein carbonyl (PC), and malondialdehyde (MDA) levels were measured in all the subjects. Levels of OCs were remarkably higher in patients with leukemia compared with the controls (p<0.05). In addition, levels of SOD, AChE, GPx, PON1, and TAC were remarkably lower in patients with leukemia compared with controls (p<0.05). In contrast, MDA, NO, and PC concentrations were higher in patients with leukemia than in the controls (p<0.05). Moreover, the serum level of 4,4-DDE was negatively associated with GPx activity (p=0.038). Our findings suggest that OCs may play a role in the development of leukemia by disrupting the oxidant/antioxidant balance.

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“…Many studies have focused on the OCP pollution in the karst water. The high OCP concentrations were reported in the surface river water (32.1–293, average 120 ng/L) [ 25 ], underground river water (2.58–320 ng/L) [ 25 , 26 ], spring water (0.30–32.2 ng/L) [ 27 ], and the sediment cores (0.85–63.1, average 8.11 ng/g) [ 28 ] in southwestern China, one of the largest karst areas in the world [ 29 ]. In the Yucatán karst area, México, severe OCP pollution (up to 1.36 × 10 7 ng/L for heptachlor) was also reported in groundwater [ 30 ].…”

Section: Introductionmentioning

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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Rapid transport of organochlorine pesticides (OCPs) in multimedia environment from karst area

Cited by 34 publications

References 78 publications

Distribution and Potential Sources of OCPs and PAHs in Waters from the Danshui River Basin in Yichang, China

Distribution and Potential Sources of OCPs and PAHs in Waters from the Danshui River Basin in Yichang, China

Organochlorine Pesticides, Oxidative Stress Biomarkers, and Leukemia: A Case-Control Study

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

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