Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process

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

	Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process
	Liu, Kang; Zhang, Zhiyuan; Zhang, Fu-Shen
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2016-11-15
卷号	318 页码:216-223
关键词	Precious metals Waste printed circuit boards Supercritical water oxidation Supercritical fluid extraction Recovery
英文摘要	The current study was carried out to develop an environmental benign process for direct recovery of palladium (Pd) and silver (Ag) from waste printed circuit boards (PCBs) powder. The process ingeniously combined supercritical water oxidation (SCWO) and supercritical carbon dioxide (Sc-CO2) extraction techniques. SCWO treatment could effectively enrich Pd and Ag by degrading non-metallic component, and a precious metal concentrate (PMC) could be obtained, in which the enrichment factors of Pd and Ag reached 5.3 and 4.8, respectively. In the second stage, more than 93.7% Pd and 96.4% Ag could be extracted from PMC by Sc-CO2 modified with acetone and KI-I2 under optimum conditions. Mechanism study indicated that Pd and Ag extraction by Sc-CO2 was a complicated physiochemical process, involving oxidation, complexation, anion exchange, mass transfer and migration approaches. Accordingly, this study established a benign and effective process for selective recovery of dispersal precious metals from waste materials. (C) 2016 Elsevier B.V. All rights reserved.
收录类别	SCI
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/35776]
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	Liu, Kang,Zhang, Zhiyuan,Zhang, Fu-Shen. Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,318:216-223.
APA	Liu, Kang,Zhang, Zhiyuan,&Zhang, Fu-Shen.(2016).Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process.JOURNAL OF HAZARDOUS MATERIALS,318,216-223.
MLA	Liu, Kang,et al."Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process".JOURNAL OF HAZARDOUS MATERIALS 318(2016):216-223.