In vitro bioaccessibility of lead in surface dust and implications for human exposure: A comparative study between industrial area and urban district | |
Xiangyang Bi; Zhonggen Li; Guangyi Sun; Jinling Liu; Zhixuan Han | |
2015 | |
Source Publication | Journal of Hazardous Materials
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Volume | 297Pages:191-197 |
Abstract | In this study, ground surface dust samples from two contrasting areas, a former zinc smelting area in Guizhou Province and a common urban district in Wuhan city, Hubei Province, China, were assessed for in vitro Pb bioaccessibility using a physiologically based extraction test (PBET). Extremely elevated concentrations of Pb (220–6348 mg/kg) and other trace metals were observed in the zinc smelting area. While moderate high metal concentrations (79–1544 mg/kg of Pb) in the urban dusts were attributed to various urban activities, coal combustion and traffic emissions. Lead bioaccessibility in the stomach-phase varied from 17.6 to 76.1% and no significant difference was found between industrial and urban dust samples. Compared with the stomach-phase, Pb bioaccessibility in the more alkaline intestinal-phase was considerably lower (1.2–21.8%). A significantly negative correlation was found between dust Ca concentrations and Pb bioaccessibility in the intestinal-phase, suggesting that Ca plays an important role in reducing the bioaccessible Pb in the intestinal-phase. The estimated Pb exposure based on gastric bioaccessible Pb was 13.9 and 1.8 μg/kg day for children living in the industrial and urban areas, respectively, accounting for 85% and 41% of their corresponding total Pb exposure. |
Keyword | Lead dust bioaccessibility in Vitro Pbet |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/9564 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China 2.School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 4.Institute of Geophysical and Geochemical Exploration CAGS, Langfang 065000, China |
Recommended Citation GB/T 7714 | Xiangyang Bi;Zhonggen Li;Guangyi Sun;Jinling Liu;Zhixuan Han. In vitro bioaccessibility of lead in surface dust and implications for human exposure: A comparative study between industrial area and urban district[J]. Journal of Hazardous Materials,2015,297:191-197. |
APA | Xiangyang Bi;Zhonggen Li;Guangyi Sun;Jinling Liu;Zhixuan Han.(2015).In vitro bioaccessibility of lead in surface dust and implications for human exposure: A comparative study between industrial area and urban district.Journal of Hazardous Materials,297,191-197. |
MLA | Xiangyang Bi;Zhonggen Li;Guangyi Sun;Jinling Liu;Zhixuan Han."In vitro bioaccessibility of lead in surface dust and implications for human exposure: A comparative study between industrial area and urban district".Journal of Hazardous Materials 297(2015):191-197. |
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