Title of Paper:The influence of land use on the concentration and vertical distribution of PBDEs in soils of an e-waste recycling region of South China

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Date of Publication:2014-08-01

Journal:ENVIRONMENTAL POLLUTION

Included Journals:SCIE、EI、PubMed、Scopus

Volume:191

Page Number:126-131

ISSN No.:0269-7491

Key Words:E-waste; PBDEs; Vertical transfer; Soil core; Farming activities

Abstract:The vertical distribution of polybrominated diphenyl ethers (PBDEs) in soil at four sites within an e-waste recycling region of South China was investigated. PBDE concentrations in soil ranged from 138 to 765 ng/g. There was a trend of decreasing PBDE concentration with soil depth, especially in the paddy field. However, high concentrations of BDE-209 were found in deeper soils indicating a highly preferential migration. There was a stronger correlation between PBDEs and total organic carbon (TOC), compared to dissolved organic carbon (DOC), which suggests that the association between non-dissolved organic carbon (NDOC) and PBDEs is stronger than for DOC. Different land use types, in particular differences in farming activities, significantly influenced the vertical distribution of PBDEs in soils. PBDEs displayed a higher leaching tendency in moist paddy soil than in drier soils. The frequent flooding condition in paddy field may facilitate the vertical transfer of PBDEs to the deeper soils. (C) 2014 Elsevier Ltd. All rights reserved.