期刊
WASTE MANAGEMENT
卷 52, 期 -, 页码 221-227出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2016.03.011
关键词
Spent lithium-ion battery; Recycling; Pretreatment; Risk assessment
资金
- National Natural Science Foundation of China [51534005]
- Shanghai Natural Science Foundation [15ZR1422200]
- Shanghai Cooperative Centre for WEEE Recycling [ZF1224-12]
The recycling of spent lithium-ion batteries brings benefits to both economic and environmental terms, but it can also lead to contaminants in a workshop environment. This study focused on metals, nonmetals and volatile organic compounds generated by the discharging and dismantling pretreatment processes which are prerequisite for recycling spent lithium-ion batteries. After discharging in NaCl solution, metal contents in supernate and concentrated liquor were detected. Among results of condition #2, #3, #4 and #5, supernate and concentrated liquor contain high levels of Na, Al, Fe; middle levels of Co, Li, Cu, Ca, Zn; and low levels of Mn, Sn, Cr, Zn, Ba, K, Mg, V. The Hg, Ag, Cr and V are not detected in any of the analyzed supernate. 10 wt% NaCl solution was a better discharging condition for high discharge efficiency, less possible harm to environment. To collect the gas released from dismantled LIB belts, a set of gas collecting system devices was designed independently. Two predominant organic vapour compounds were dimethyl carbonate (4.298 mg h(-1)) and tert-amylbenzene (0.749 mg h(-1)) from one dismantled battery cell. To make sure the concentrations of dimethyl carbonate under recommended industrial exposure limit (REL) of 100 mg L-1, for a workshop on dismantling capacity of 1000 kg spent LIBs, the minimum flow rate of ventilating pump should be 235.16 m(3) h(-1). (C) 2016 Elsevier Ltd. All rights reserved.
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