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| Residues and Ecological Risk Assessment of Polychlorinated Biphenyls in Suburban Vegetable Soils of Jilin City |
| Received:January 05, 2015 |
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| KeyWord:chemical industry region;vegetable soil;polychlorinated biphenyls;residual characteristics;risk assessment |
| Author Name | Affiliation | E-mail | | CHEN Xiao-rong | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | WANG Yang | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China | wangyangw@neigae.ac.cn | | LIU Jing-shuang | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China | | | LIU Qiang | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China | | | CUI Zheng-wu | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China | | | DU Lian-sheng | Northeast Institute of Geography and Agroecology, CAS, Changchun 130102, China | |
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| Abstract: |
| Polychlorinated biphenyls(PCBs) have contaminated agricultural soils. In order to investigate residues and ecological risks of polychlorinated biphenyls(PCBs) in vegetable soils in Jilin suburbs, we analyzed concentrations and distribution characteristics of 11 PCBs in the vegetable topsoils from Jilin suburbs, assessed the ecological risks using environmental quality standard and toxicity equivalent factor. The total concentrations of PCBs in the vegetable soils varied greatly, ranging from 58.20 μg·kg-1 to 253.08 μg·kg-1, with an average concentration of 111.00 μg·kg-1. The total concentrations of PCBs in some areas exceeded the secondary standard of the national soil environmental quality, indicating potential risks in the vegetable fields. Soil PCBs were mainly five- or more ring congeners. The highest concentration of PCBs was found in the northern suburbs, where chemical plants were highly concentrated, showing the impact of human activities on the environmental quality of vegetable soils in this area. Principal component analysis revealed that the principal component 1 contributed 31.67% to the variance, mainly from paint, insulation materials and other industrial products. The principal component 2 made 20.05% contribution to the variance, which resulted from power capacitor impregnant. The percent contribution of principal component 3 and 4 were respectively 11.16% and 9.62%, which were waste incineration and volatilization of PCBs in plasticizer. Overall, the pollution level or toxic equivalence of PCBs in vegetable soils of Jilin suburbs was at a moderate level, and posed a potential ecological risk. Attentions should be paid to their threats to human health. |
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