An environmentally friendly ball milling process for recovery of valuable metals from e-waste scraps

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 固体废弃物处理与资源化实验室

	An environmentally friendly ball milling process for recovery of valuable metals from e-waste scraps
	Zhang, Fu-Shen; Zhang, Zhi-Yuan; Yao, TianQi
刊名	WASTE MANAGEMENT
	2017-10-01
卷号	68 期号:0 页码:490-497
关键词	Ball Milling E-waste Metal Recovery Mechanochemical Process
英文摘要	The present study reports a mechanochemical (MC) process for effective recovery of copper (Cu) and precious metals (i.e. Pd and Ag) from e-waste scraps. Results indicated that the mixture of K2S2O8 and NaCI (abbreviated as K2S2O8/NaCI hereafter) was the most effective co-milling reagents in terms of high recovery rate. After co-milling with K2S2O8/NaCl, soluble metallic compounds were produced and consequently benefit the subsequent leaching process. 99.9% of Cu and 95.5% of Pd in the e-wasteparticles could be recovered in 0.5 mol/L diluted HCl in 15 min. Ag was concentrated in the leaching residue as AgCl and then recovered in 1 mol/LNH3 solution. XRD and XPS analysis indicated that elemental metals in the raw materials were transformed into their corresponding oxidation state during ball milling process at low temperature, implying that solid-solid phase reactions is the reaction mechanism. Based on the results and thermodynamic parameters of the probable reactions, possible reaction pathways during ball milling were proposed. Suggestion on category of e-waste for ball milling process was put forward according to the experiment results. The designed metal recovery process of this study has the advantages of highly recovery rate and quick leaching speed. Thus, this study offers a promising and environmentally friendly method for recovering valuable metals from e-waste. (C) 2017 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39218]
专题	生态环境研究中心_固体废弃物处理与资源化实验室
推荐引用方式 GB/T 7714	Zhang, Fu-Shen,Zhang, Zhi-Yuan,Yao, TianQi. An environmentally friendly ball milling process for recovery of valuable metals from e-waste scraps[J]. WASTE MANAGEMENT,2017,68(0):490-497.
APA	Zhang, Fu-Shen,Zhang, Zhi-Yuan,&Yao, TianQi.(2017).An environmentally friendly ball milling process for recovery of valuable metals from e-waste scraps.WASTE MANAGEMENT,68(0),490-497.
MLA	Zhang, Fu-Shen,et al."An environmentally friendly ball milling process for recovery of valuable metals from e-waste scraps".WASTE MANAGEMENT 68.0(2017):490-497.