点击次数：

论文类型：期刊论文

发表时间：2016-07-01

发表刊物：ENVIRONMENTAL POLLUTION

收录刊物：SCIE、EI、PubMed、Scopus

卷号：214

页面范围：705-712

ISSN号：0269-7491

关键字：Vegetable; E-waste; Plant uptake; PBDEs; NBFRs; DPs

摘要：The concentrations and homolog patterns of halogenated flame retardants (HFRs) in vegetables grown at an e-waste contaminated site were investigated. Polybrominated diphenyl ethers (PBDEs) were the dominant HFRs in vegetable tissues, with concentrations ranging from 103 to 164 ng g(-1) and 1.16 -107 ng g(-1) in shoots and roots, respectively, followed by novel brominated flame retardants (NBFRs) and dechlorane plus (DPs). This is an indication that PBDE contamination in vegetables grown around e-waste recycling sites may pose a risk to the local terrestrial ecosystem and residents. In addition, this is the first report on the concentrations and compositions of NBFRs in vegetables around e-waste recycling sites. The HFRs concentrations in vegetables varied greatly with the vegetable species, with the highest concentrations observed in Brassica oleracea var. capitata. Root concentration factors (RCF) decreased with increasing log K-ow of HFRs, which indicated that the uptake of HFRs was controlled mainly by log K-ow. Dissimilar HFRs profiles in shoots and roots suggested that the uptake and translocation of HFRs by plants were selective, with lower halogenated congeners prone to accumulation in vegetable tissues. Positive relationships between PBDEs and their substitutes were observed in vegetable tissues, suggesting that the replacement of PBDEs by NBFRs has not resulted in an obvious transition in plants within the study area. (C) 2016 Elsevier Ltd. All rights reserved.