The influence of land use on the concentration and vertical distribution of PBDEs in soils of an e-waste recycling region of South China.
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 1.38 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.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Zhineng
Z
Cheng
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China; Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Yan
Y
Wang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Shaorui
S
Wang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China. Electronic address: clluo@gig.ac.cn.
Chunling
C
Luo
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China.
Jun
J
Li
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China.
Chakra
C
Chaemfa
School of Marine Sciences, Sun Yat -sen (Zhongshan) University, Guangzhou 510006, China.
Haoyu
H
Jiang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Kehua Street No. 511, Guangzhou 510640, China.
Gan
G
Zhang
D002681:China; D004784:Environmental Monitoring / Q000379:methods; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000737:chemistry; D011075:Polybrominated Biphenyls / Q000032:analysis* / Q000737:chemistry; D059027:Recycling; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
D055768:Halogenated Diphenyl Ethers; D011075:Polybrominated Biphenyls; D012987:Soil; D012989:Soil Pollutants; C010902:decabromobiphenyl ether
E-waste; Farming activities; PBDEs; Soil core; Vertical transfer