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论文类型：期刊论文

发表时间：2020-02-25

发表刊物：SCIENCE OF THE TOTAL ENVIRONMENT

收录刊物：PubMed、EI、SCIE

卷号：705

页面范围：135995

ISSN号：0048-9697

关键字：Road dust; OPFRs; Source; TCIPP; Human exposure

摘要：We investigated the occurrence, distribution, and potential sources of 10 organophosphorus flame retardants (OPFRs) in road dust from the urban area of Dalian, China, as well as their associated human exposures and health risks. The total concentration of Sigma(10)OPFIts ranged from 300 to 7480 ng/g with a median of 1600 ng/g. Relatively high concentrations were observed mainly near prosperous business districts or dense residential areas. Tris(2-chloroethyl) phosphate (TCEP), tris(1-chloro-2-propyl) phosphate (TCIPP), and triphenylphosphine oxide (TPPO) were detected in all dust samples. TCIPP was the dominant congener, followed by TPPO. It was found that traffic flow can obviously influence the concentration of OPFRs in road dust, suggesting vehicles may be the major sources of OPFRs in road dust, presumably from materials used in their interiors. Correlations between certain OPFRs and population density indicate a significant influence by anthropogenic activities on OPFR levels. The average daily doses (ADD) of Sigma(10)OPFRs via ingestion, inhalation and dermal absorption from road dust were evaluated as 026 and 0.087 ng/(kg-bw.d) for children and adults respectively, with dust ingestion as the main exposure pathway of OPFRs. Although the exposure risk of OPFRs via road dust was relatively low in Dalian, further studies on the exposure of OPFRs are still necessary due to combined effects with other exposure pathways. (C) 2019 Elsevier B.V. All rights reserved.