Distribution of Polychlorinated Biphenyls (PCBs) and Toxic Equivalency of Dioxin-Like PCB Congeners in Rural Soils of Beijing, China

被引：9
|
作者：
Wu, S. [1 ,2 ]
Xia, X. H. [1 ]
Zhang, S. W. [1 ]
Liu, Q. [1 ]
Xu, L. [1 ]
机构：
[1] Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China
[2] Guangdong Inst Ecoenvironm & Soil Sci, Guangzhou 510650, Guangdong, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL INFORMATICS | 2012年 / 20卷 / 01期
关键词：
polychlorinated biphenyls; rural soil; toxic equivalency; spatial distribution; Beijing; POLYBROMINATED DIPHENYL ETHERS; POLYCYCLIC AROMATIC-HYDROCARBONS; HISTORICAL EMISSION INVENTORY; PERSISTENT ORGANIC POLLUTANTS; SURFACE SOILS; AGRICULTURAL SOILS; URBAN SOILS; AIR; PBDES; ENVIRONMENT;
D O I：
10.3808/jei.201200216
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The soil quality in rural area may associate with the health of local residents and food safety. This study aimed to investigate the spatial and vertical distribution of PCBs in rural soils of Beijing, and the source identification of PCBs and toxic equivalency calculation of dioxin-like PCB congeners were conducted. The mean of total PCB concentrations in Beijing rural soils was 11.01 ng g(-1). The congener profiles were predominated by lowly chlorinated congeners such as Di-CBs, Tr-CBs and Tetra-CBs. No significant difference of PCBs concentrations was observed between plain and mountain areas, and PCBs were slightly accumulated in the surface soils of Beijing rural area. Long-range transport of volatile PCB congeners was also an important source in addition to local sources of PCBs from electronic products. Toxic equivalency concentrations of dioxin-like PCB congeners met Canadian soil quality guidelines for agricultural soils, indicating a lower risk of PCBs to human health.
引用
收藏
页码：12 / 19
页数：8
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