Copper recovery from waste printed circuit boards concentrated metal scraps by electrolysis

被引:0
作者
Xiaonan Liu
Qiuxia Tan
Yungui Li
Zhonghui Xu
Mengjun Chen
机构
[1] Southwest University of Science and Technology,State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials
[2] Southwest University of Science and Technology,Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education
来源
Frontiers of Environmental Science & Engineering | 2017年 / 11卷
关键词
Waste printed circuit boards (WPCBs); Copper; Recovery rate; Purity; Electrolysis;
D O I
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中图分类号
学科分类号
摘要
Copper recovery is the core of waste printed circuit boards (WPCBs) treatment. In this study, we proposed a feasible and efficient way to recover copper from WPCBs concentrated metal scraps by direct electrolysis and factors that affect copper recovery rate and purity, mainly CuSO4·5H2O concentration, NaCl concentration, H2SO4 concentration and current density, were discussed in detail. The results indicated that copper recovery rate increased first with the increase of CuSO4·5H2O, NaCl, H2SO4 and current density and then decreased with further increasing these conditions. NaCl, H2SO4 and current density also showed a similar impact on copper purity, which also increased first and then decreased. Copper purity increased with the increase of CuSO4·5H2O. When the concentration of CuSO4·5H2O, NaCl and H2SO4 was respectively 90, 40 and 118 g/L and current density was 80 mA/cm2, copper recovery rate and purity was up to 97.32% and 99.86%, respectively. Thus, electrolysis proposes a feasible and prospective approach for waste printed circuit boards recycle, even for e-waste, though more researches are needed for industrial application.[graphic not available: see fulltext]
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