Pollution characteristics and risk assessment of human exposure to oral bioaccessibility of heavy metals via urban street dusts from different functional areas in Chengdu, China

文献类型: 外文期刊

第一作者: Li, Han-Han

作者: Li, Han-Han;Chen, Liu-Jun;Yu, Lin;Yang, Zhan-Biao;Yang, Yuan-Xiang;Zhu, Xue-Mei;Cheng, Zhang;Guo, Zhong-Bao;Shan, Chun-Qiao;Lin, Jian-Qing;Gu, Yang-Guang;Shao, Ji-Rong

作者机构:

关键词: Urban street dust;Heavy metals;Functional areas;Oral bioaccessibility;Risk assessment

期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 影响因子:7.963; 五年影响因子:7.842 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Urban street dusts were collected in commercial area (CA), traffic area (TA), educational area (EA), residential area (RA) and parks area (PA) of Chengdu, China, to investigate the concentrations of heavy metals (Pb, Zn, Cu, Ni, Cd and Cr), and analyzed to evaluated possible sources and health risk assessment. The average concentrations (mg/kg) of Pb (823), Zn (296), Cu (100), Cd (1.66) and Cr (843) in urban street dusts were all higher than the local soil background values. The concentrations of heavy metals in each functional area could be classified as follows: CA > TA > RA > EA > PA. Principal component analysis and Cluster analysis showed mainly derived from the mixed sources of nature and traffic (51.7%). The results of health risk assessment showed no non-carcinogenic and carcinogenic risks of the metals for inhabitants. However, higher concentrations and oral bioaccessibility of the heavy metals in the dusts from CA and TA, indicating there was more health risks to the inhabitants in than that in other functional areas. (C) 2017 Published by Elsevier B.V.

分类号: X1

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