Characteristics and health risk assessment of polychlorinated biphenyls in surface soil of the Yangtze River
LU Yin-tao1, LIU Ming-li1,2, LIU Yin-zuo1, ZHANG Shi-chao1, XIANG Xin-xin1, YAO Hong1
1. Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. CCCC-AECOM Eco-Enviromental Co., Ltd, Beijing 100010, China
Polychlorinated biphenyls (PCBs) concentration in surface soil samples collected from 14mainstream and 18branch cross sections of the Yangtze River were analyzed by GC-MS. The residual characteristics, pollution sources, and ecological risks were also analyzed. The results showed that the concentrations of total PCBs in surface soil ranged from 1.05 to 50.11ng/g dry weight (ng/g dw), with an average value of 5.71ng/g dw, and the PCBs concentration in this study was in a comparatively low level. The content of PCBs in the mainstream has gradually increased from the upstream to the downstream, and the total content of PCB in the second and third-tier cities such as Yichang, Yueyang, Wuhan and Chongqing was relatively high. PCB17, PCB18, PCB44, PCB74, PCB87 were identified as the prevalent contaminates of the surface soil. Tri-and tetra-chlorobiphenyl were the main congeners, indicating that the surface soil in the Yangtze River basin was mainly contaminated with low-chlorobiphenyl. The principal component analysis showed that PCBs mainly come from the mixed pollution sources of No. 1transformer oil, Aorclor 1242, 1248, atmospheric deposition and surface runoff. The health risk assessment of surface soil in the Yangtze River Basin showed that PCBs have a relatively low risk, and the potential risk of inhalation was lower than accidental ingestion and dermal contact.
鲁垠涛, 刘明丽, 刘殷佐, 张士超, 向鑫鑫, 姚宏. 长江表层土壤多氯联苯污染特征及风险评价[J]. 中国环境科学, 2018, 38(12): 4617-4624.
LU Yin-tao, LIU Ming-li, LIU Yin-zuo, ZHANG Shi-chao, XIANG Xin-xin, YAO Hong. Characteristics and health risk assessment of polychlorinated biphenyls in surface soil of the Yangtze River. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(12): 4617-4624.
Haddaoui I, Mahjoub O, Mahjoub B, et al. Occurrence and distribution of PAHs, PCBs, and chlorinated pesticides in Tunisian soil irrigated with treated wastewater[J]. Chemosphere, 2016,146:195-205.
[2]
Van D B M, Birnbaum L, Bosveld A T, et al. Toxic equivalency factors (TEFs) for PCBs, PCDDs, PCDFs for humans and wildlife.[J]. Environmental Health Perspectives, 1998,106(12):775.
[3]
WH Organization. Polychlorinated biphenyls and terphenyls. Environmental Polychlorinated biphenyls and terphenyls. Environmental Health Criteria, 140[S]. Geneva, 1993.
[4]
Hu X, Shi W, Cao F, et al. Bioanalytical and instrumental analysis of estrogenic activities in drinking water sources from Yangtze River Delta.[J]. Chemosphere, 2013,90(7):2123-2128.
Zhang T, Yang W L, Chen S J, et al. Occurrence, sources, and ecological risks of PBDEs, PCBs, OCPs, and PAHs in surface sediments of the Yangtze River Delta city cluster, China.[J]. Environmental Monitoring & Assessment. 2014,186(8):5285-5295.
Wang D, Yang M, Jia H, et al. Levels, distributions and profiles of polychlorinated biphenyls in surface soils of Dalian, China[J]. Chemosphere, 2008,73(1):38-42.
Zhang H B, Luo Y M, Wong M H, et al. Concentrations and possible sources of polychlorinated biphenyls in the soils of Hong Kong[J]. Geoderma, 2007,138(3/4):244-251.
[19]
Manz M, Wenzel K D, Dietze U, et al. Persistent organic pollutants in agricultural soils of central Germany[J]. Science of The Total Environment, 2001,277(1-3):187-198.
[20]
Salihoglu G, Tasdemir Y. Prediction of the PCB pollution in the soils of Bursa, an industrial city in Turkey[J]. Journal of Hazardous Materials, 2009,164(2/3):1523-1531.
Harrad S J, Sewart A P, Alcock R, et al. Polychlorinated biphenyls (PCBs) in the British environment:Sinks, sources and temporal trends[J]. Environmental Pollution, 1994,85(2):131-146.
Wu J, Jian L, Luo Y, et al. An overview on the organic pollution around the Qinghai-Tibet plateau:The thought-provoking situation[J]. Environment International, 2016,97:264-272.