Occurrence, spatial distribution, source, and ecological risk assessment of organochlorine pesticides in Dongting Lake, China

Cao, Fengmei; Li, Zhaozhao; He, Qi; Lu, Shaoyong; Qin, Pan; Li, Linlin

doi:10.1007/s11356-021-12743-x

Cited by 21 publications

(9 citation statements)

References 64 publications

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“…In contrast, HCHs were detected in the surface sediments of Qinghai Lake at concentrations of 0.02–1.00 ng g −1 and DDTs at a maximum of 0.86 ng g −1 , slightly lower than in the Huangshui River Basin [ 4 ]. The residues of organochlorine pesticides in the soils of the Alps (0.4–28.8 μg kg −1 for p,p′ -DDT, 0.3–8.8 μg kg −1 for γ-HCH), also an alpine region, were higher than in the Huangshui River Basin [ 3 ]. The mean concentrations of DDTs in the soils of Binhai New Area of Tianjin reached 73.9 μg kg −1 and HCHs reached 666 μg kg −1 ; the concentrations of DDTs in the soils of the estuary of Bohai Bay ranged from 98.32–129.10 μg kg −1 and HCHs ranged from 69.81–379.28 μg kg −1 , both much higher than concentrations in the Huangshui River Basin.…”

Section: Resultsmentioning

confidence: 99%

“…Dichlorodiphenyltrichloroethane (DDTs) and hexachlorocyclohexane (HCHs) were the earliest and most widely used OCPs, with China accounting for 33% (4.9 million tons) of global production of HCHs and 20% (400,000 tons) of global production of DDTs before production was banned in May 1983 [ 2 ]. Although OCPs have been banned, they can be transported even to remote polar and high altitudes regions with cold climates due to their long-range atmospheric transport and ‘cold condensation effect’ [ 3 ]. OCPs have been shown to be present in the Tibetan Plateau region [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Distribution, Transfer, and Health Risk of Organochlorine Pesticides in Soil and Water of the Huangshui River Basin

Yu,

Zhou,

et al. 2023

Toxics

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The potential negative impacts of organochlorine pesticides on the environment and human health continue to receive attention. In order to study the spatial distribution characteristics of organochlorine pesticides in the inland alpine region, researchers collected soil and water samples in the Huangshui River Basin of the Qinghai–Tibetan Plateau and tested them for organochlorine pesticide residues represented by dichlorodiphenyltrichloroethane (DDT) and hexachlorohexane (HCH). The study identified the sources of OCPs by component analysis. We also constructed the LEVEL III model, applicable to the Huangshui River Basin, and used it to study the migration patterns of OCPs in various environmental media. OCPs were detected at low levels in the study area environment. The results of the OCPs source analysis show that there are both historical residuals and new sources in the region. Residual DDTs may originate from the mixture of technical DDTs and dicofol, and HCHs may originate from lindane or technical HCH. DDTs are mainly stored in soil, the input and output pathways are mainly atmospheric advection input and output, and its transport behavior in the environment is mainly air–soil exchange. Carcinogens in the study area pose little threat to people exposed to contaminated soil and contaminated water, but the cancer risk to children is greater than to adults. This study is helpful to managers of regional pesticide management and control.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution, Transfer, and Health Risk of Organochlorine Pesticides in Soil and Water of the Huangshui River Basin

Yu,

Zhou,

et al. 2023

Toxics

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“…Although sample complexity, trace content, and poor molecule affinity for metal surfaces provide significant hurdles for SERS [ 36 ]. OCPs have been extracted from sediment using the soxhlet method [ [37] , [38] , [39] ]. Isotope dilution and centrifugation [ 40 , 41 ] and SPE [ 42 , 43 ] have been utilized for human serum extraction, while salting-out liquid-liquid extraction (SALLE) combined with dispersive liquid-liquid microextraction (DLLME) has been reported for human tissue (liver, kidney, brain, etc) [ 44 ].…”

Section: Results and Discussion: Literature Reviewmentioning

confidence: 99%

Review of scientific literature on available methods of assessing organochlorine pesticides in the environment

Ohoro,

Wepener

2023

Heliyon

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“…In recent decades, with the widespread use of antibiotics in various elds such as healthcare, industry, and agriculture, there has been a signi cant increase in antibiotic resistant bacteria and antibiotic resistance genes (ARGs) in the environment (Rodriguez-Mozazs S et al, 2015; Peng D et al, 2023). As novel environmental pollutants, ARGs (Antimicrobial Resistance Genes) can be integrated into various microorganisms through mobile genetic elements, thereby forming a transmission system that spans "human-environment-human" (Zarei-Baygi A et al, 2019; Cao F et al, 2021). After entering the human body, ARGs not only affect the structure of the gut microbiota but also increase the di culty in treating associated pathogenic bacterial diseases when ARGs from the environment are integrated into pathogenic bacteria (Lupo A et al, 2012;Ravi A et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Research of the compositional characteristics of antibiotic resistance genes in sediments from the Three Gorges Reservoir area

Han,

Cao,

Tan

et al. 2024

Preprint

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Antimicrobial resistance genes (ARGs) are widespread across various regions. While several studies have investigated the distribution of antibiotic resistance in natural environments, the occurrence and diversity of ARGs in the Three Gorges Reservoir have not been fully elucidated. In this study, we employed metagenomic sequencing techniques to investigate the abundance, diversity, and influencing factors of ARGs in the ecosystem of the Three Gorges Reservoir. A total of 874 ARGs, 20 antibiotic classes against which resistance genes are deployed, and 6 resistance mechanisms were detected. The dominant ARG is the macB gene, the dominant antibiotic class is multidrug resistance (MDR), and the dominant resistance mechanism is antibiotic efflux. The microorganisms with the highest contribution to ARGs are Betaproteobacteria and Gammaproteobacteria, while physicochemical factors have little impact on the distribution of ARGs. The results indicate that the Three Gorges Reservoir constitutes a significant reservoir of ARGs. By examining the distribution of ARGs in the sediments of the Three Gorges Reservoir and the associated characteristics between microorganisms and ARGs, we aim to understand the current state of resistance pollution in the Three Gorges region, thereby providing theoretical support for risk assessment of resistance genes in the environment.

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Occurrence, spatial distribution, source, and ecological risk assessment of organochlorine pesticides in Dongting Lake, China

Cited by 21 publications

References 64 publications

Distribution, Transfer, and Health Risk of Organochlorine Pesticides in Soil and Water of the Huangshui River Basin

Distribution, Transfer, and Health Risk of Organochlorine Pesticides in Soil and Water of the Huangshui River Basin

Review of scientific literature on available methods of assessing organochlorine pesticides in the environment

Research of the compositional characteristics of antibiotic resistance genes in sediments from the Three Gorges Reservoir area

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