Outdoor Atmospheric Micro‐/Nanomineral‐Mediated Organochlorine Pesticides in Sichuan Basin, China: Adsorption, Occurrence, and Risk Assessment

Zhenzhen Lv; Faqin Dong; Hailong LiLin ZhouWen ZhangFei ZhengQiming WangMingxue LiuTingting HuoYulian Zhao

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Outdoor Atmospheric Micro‐/Nanomineral‐Mediated Organochlorine Pesticides in Sichuan Basin, China: Adsorption, Occurrence, and Risk Assessment

机译：Outdoor Atmospheric Micro‐/Nanomineral‐Mediated Organochlorine Pesticides in Sichuan Basin, China: Adsorption, Occurrence, and Risk Assessment

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Atmospheric micro‐/nanominerals play an important role in the adsorption, enrichment, and migration of organochlorinepesticides (OCPs). In the present study, the correlations between OCPs and minerals in outdoor atmosphericdustfall were investigated, and the correlations were used to speculate the source of p,p′‐(dicofol+dichlorobenzophenoneDBP), which is the sum of p,p′‐dicofol and p,p′‐DBP. Atmospheric dustfall samples were collected from 53 sites in theChengdu–Deyang–Mianyang economic region in the Sichuan basin. In this region, 24 OCPs were analyzed by gaschromatography–tandem mass spectrometry. The average concentration of 24 OCPs was 51.2 ± 27.4 ng/g. The resultsshowed that the concentration of Σ24OCPs in urban areas was higher than that in suburban areas (p < 0.05). Minerals inatmospheric dustfall were semiquantitatively analyzed by X‐ray diffraction. The primary minerals were quartz, calcite, andgypsum. A Spearman correlation analysis of OCPs and minerals showed that low‐volatility OCPs could be adsorbed byminerals in atmospheric dustfall. A density functional theory simulation verified that p,p′‐(dicofol+DBP) in atmosphericdustfall was primarily derived from the p,p′‐dicofol adsorbed by gypsum. Isomeric ratio results suggested that the sampleshad weathered lindane and chlordane profiles and confirmed that residents in the Sichuan basin used technical dichlorodiphenyltrichloroethane.Finally, the OCPs were evaluated to determine the potential risk of cancer in adults andchildren from OCP exposure. Exposure to OCPs via atmospheric dustfall was safe for adults. The cancer risk for childrenexposed to OCPs was slightly lower than the threshold value (10~(–6)) under a high dust ingestion rate, which poses a concern.

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《Environmental toxicology and chemistry /》 |2023年第3期|594-604|共11页
作者
Zhenzhen Lv; Faqin Dong; Hailong LiLin ZhouWen ZhangFei ZhengQiming WangMingxue LiuTingting HuoYulian Zhao;
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作者单位

School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China;

School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China;

Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, ChinaCollege of Sciences, Shihezi University, Shihezi, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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关键词
Adsorption; atmospheric drift; dichlorodiphenyltrichloroethane (DDT); micro‐/nanomaterials; organochlorine pesticides; pollution characteristics; Sichuan basin; risk assessment;

Outdoor Atmospheric Micro‐/Nanomineral‐Mediated Organochlorine Pesticides in Sichuan Basin, China: Adsorption, Occurrence, and Risk Assessment

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