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论文类型：期刊论文

发表时间：2014-03-01

发表刊物：ENVIRONMENTAL POLLUTION

收录刊物：SCIE、EI、PubMed、Scopus

卷号：186

页面范围：104-109

ISSN号：0269-7491

关键字：Rhizosphere effect; E-waste; PBDEs; Soil; Substituent effect; Bioaccumulation

摘要：Rhizosphere effects on the distribution of PBDEs in e-waste contaminated soils were investigated. The geometric means of the PBDEs in the rhizosphere and non-rhizosphere soils were 32.6 ng/g and 12.2 ng/g, whereas the geometric means of the PBDEs in vegetable shoots and roots were 2.15 ng/g and 3.02 ng/g, respectively. PBDEs in soil at different distances from the root surface may first rise appreciably and then decrease to a non-rhizosphere level for long-term contaminated soils. Different PBDE compositions in roots and shoots indicated that PBDEs in shoots may be mainly taken up from the air. The ratios of BDE99/100 and BDE153/154 in plants and their corresponding soils were different. The bioaccumulations of BDEs 100 and 154 were much higher than those of BDEs 99 and 153, respectively. This indicated that the bioaccumulation was selective and influenced by the substitution pattern, with ortho-substituted isomers being more prevalent than meta-substituted isomers. (C) 2014 Elsevier Ltd. All rights reserved.