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Recovery of Copper from Bio-Leaching Solutions of Waste Printed Circuit Boards Waste by Solvent Extraction Using RE609 and N902

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Abstract:

According to the properties of bioleaching solutions of printed circuit boards (PCBs), copper(Ⅱ) in the leaching solution were recovery by solvent extraction with N902 and RE609. The influence of equilibration time，extractant concentration，O/A ratios，pH value on copper(Ⅱ) extraction and sulphuric acid concentration on copper(Ⅱ) stripping had been studied. Extraction of copper increased with increasing extractant concentration with both the extractants. More than 97.45% of copper can be extracted from a typical bioleaching solution of PCBs after copper extraction was carried out using 10% N902 diluted in kerosene at O/A ratio of 1:1, while 97.14% of copper can be extracted using 20% RE609 diluted in kerosene at O/A ratio of 1:1. The stripping of copper loaded N902 and RE609 increased with increasing H2SO4 concentration, but stripping of the latter was lower than the former.More than 93.57% and 90.29%of copper can be stripped from the loaded N902 and RE609 stripped at 1:1 phase ratio with 1.8 M H2SO4 in a single stage.

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Periodical:

Advanced Materials Research (Volumes 113-116)

Pages:

2228-2231

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.113-116.2228

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Online since:

June 2010

Authors:

Cheng Long Zhang, Wang Dong Fang, Yu Chen, Jing Wei Wang, Jian Feng Bai

Keywords:

Bioleaching, Copper (Cu), N902, RE609, Solvent Extraction, Waste Printed Circuit Board (WPCB)

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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