期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 279, 期 -, 页码 46-51出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2014.06.045
关键词
Waste PCBs; Recovery; Palladium; Extraction; S201
资金
- National Natural Science Foundation of China [51278485]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB05050200]
- Science Promotion Program of Research Center for Eco-Environmental Sciences, CAS [YSW2013B05]
An environmental benign, non-acid process was successfully developed for selective recovery of palladium from waste printed circuit boards (PCBs). In the process, palladium was firstly enriched during copper recovery procedure and dissolved in a special solution made of CuSO4 and NaCl. The dissolved palladium was then extracted by diisoamyl sulfide (S201). It was found that 99.4% of Pd(II) could be extracted from the solution under the optimum conditions (10% S201, A/O ratio 5 and 2 min extraction). In the whole extraction process, the influence of base metals was negligible due to the relatively weak nucleophilic substitution of S201 with base metal irons and the strong steric hindrance of S201 molecular. Around 99.5% of the extracted Pd(II) could be stripped from S201/dodecane with 0.1 mol/L NH3 after a two-stage stripping at A/O ratio of 1. The total recovery percentage of palladium was 96.9% during the dissolution-extraction-stripping process. Therefore, this study established a benign and effective process for selective recovery of palladium from waste printed circuit boards. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据