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| Distribution characteristics and health risk assessment of organochlorine pesticides in surface soil from the major farming and animal husbandry districts in Inner Mongolia |
| Received:September 20, 2016 |
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| KeyWord:Inner Mongolia farming and animal husbandry districts;soil;organochlorine pesticides(OCPs);distribution characteristics;health risk assessment |
| Author Name | Affiliation | E-mail | | MENG Pei-jun | Public Health School of Baotou Medical College, Baotou 014060, China | | | LI Shu-rong | Public Health School of Baotou Medical College, Baotou 014060, China | | | HE Yan-ling | Public Health School of Baotou Medical College, Baotou 014060, China | | | ZHANG Ai-hua | Public Health School of Baotou Medical College, Baotou 014060, China | | | ZHANG Li-ping | Public Health School of Baotou Medical College, Baotou 014060, China | zlp610202@sina.com | | JIN Min | Public Health School of Baotou Medical College, Baotou 014060, China | | | LIANG Qing-qing | Public Health School of Baotou Medical College, Baotou 014060, China | | | ZHANG Ling-yan | Public Health School of Baotou Medical College, Baotou 014060, China | |
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| Abstract: |
| 216 surface soil samples were collected from the major farming and animal husbandry districts in Inner Mongolia. 21 kinds of organochlorine pesticides(OCPs) in soil were analyzed by a Ni electron capture detector(GC-ECD) to investigate the residues level, distribution characteristics, sources and potential health risks of these compounds in the study region. The results showed that OCPs residues in both farming and animal husbandry district soil ranged 0.64~102 ng·g-1(mean 26.3 ng·g-1) and 0.18~23.8 ng·g-1(mean 5.81 ng·g-1), respectively. The detection ratio of HCHs and DDTs's isomers ranged between 89.1% and 100%, which were considered to be the dominant OCPs in the research region, and their concentrations accorded with the first class levels of the environmental quality standard for soils(GB 15618-1995). Compared with other regions, the OCPs pollution in this study region stayed at a lower level. In addition, source analysis indicated that lindane, a small number of industrial HCHs and dicofol might be used in the farming district. However, for the animal husbandry district, the early residues and atmospheric deposition of OCPs were the main cause of soil pollution. The higher residue level of OCPs, HCHs and DDTs in different types of lands occurred in vegetable land, watermelon patch and soybean field. The health risk assessment suggested that OCPs residues in the survey areas do not pose a health threat to the local residents. |
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