文献类型：期刊文献

英文题名：Leaching characteristics of heavy metals and brominated flame retardants from waste printed circuit boards

作者：Zhou, Xiaoyu[1];Guo, Jie[1];Lin, Kuangfei[1,2];Huang, Kai[1];Deng, Jingjing[1]

机构：[1]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：246

起止页码：96

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20130215895888);WOS:【SCI-EXPANDED(收录号:WOS:000316155300012)】；

基金：This work was supported by the National Environmental Protection Public Welfare Science and Technology Research Program of China (200909089), the Fundamental Research Funds for the Central Universities (WB1114060) and the China Postdoctoral Science Special Foundation (2012T50402). We would also appreciate the anonymous referees for their helpful comments on this article.

语种：英文

外文关键词：Leaching; Brominated flame retardant; Heavy metal; Landfill leachate

摘要：Leaching assessment on five heavy metals (copper, zinc, lead, nickel and cadmium) and two brominated flame retardants (BFRs), polybrominated diphenyl ethers (PBDEs) and tetrabromobisphenol A (TBBPA), from waste printed circuit boards (WPCBs) were conducted using various leaching methods. The mean leaching concentrations of copper were the highest in both toxicity characteristic leaching procedures (TCLP) and synthetic precipitation leaching procedures (SPLP) tests at 8.6 mg/L and 1.1 mg/L, while only lead (6.2 mg/L) exceeded the TCLP criteria and Chinese EPA regulatory limit (both 5.0 mg/L). However, PBDEs and TBBPA were not detected in TCLP and SPLP tests. Then the BFRs leaching trends and potential leachabilities were further investigated in actual landfill leachates using a modified method. Leaching characteristics that fast-leaching initially followed by slow-desorption over time were generally observed. In landfill leachate tests, the highest leaching concentrations of PBDEs and TBBPA were determined at 30.39 and 12.27 mu g/L. Meanwhile, the highest leaching rates were estimated to reach 0.08% and 1.00%, respectively, which were significantly influenced by the dissolved organic carbon contents of extracts, the hydrophobicities of target BFRs and the specific surface areas of WPCBs materials. These results proved that leaching from WPCBs was a significant emission source of BFRs in landfill and electronic waste recycling dumpsite. (C) 2012 Elsevier B.V. All rights reserved.