Copper recovery and gold enrichment from waste printed circuit boards by mediated electrochemical oxidation

被引：101

作者：

Fogarasi, Szabolcs ^{[1
]}

Imre-Lucaci, Florica ^{[2
]}

Imre-Lucaci, Arpad ^{[1
]}

Ilea, Petru ^{[1
]}

机构：

[1] Univ Babes Bolyai, Fac Chem & Chem Engn, Dept Chem Engn, RO-400028 Cluj Napoca, Romania

[2] Univ Babes Bolyai, Interdisciplinary Res Inst Bionanosci, RO-400271 Cluj Napoca, Romania

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2014年 / 273卷

关键词：

Waste printed circuit boards; Recycling-technology; Metal leaching; Metal electrodeposition; Eco-friendly process; SELECTIVE RECOVERY; METALS; PCBS;

D O I：

10.1016/j.jhazmat.2014.03.043

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present study aims to develop an eco-friendly chemical-electrochemical process for the simultaneous recovery of copper and separation of a gold rich residue from waste printed circuit boards (WPCBs). The process was carried out by employing two different types of reactors coupled in series: a leaching reactor with a perforated rotating drum, for the dissolution of base metals and a divided electrochemical reactor for the regeneration of the leaching solution with the parallel electrowinning of copper. The process performances were evaluated on the basis of the dissolution efficiency, current efficiency and specific energy consumptions. Finally a process scale up was realized taking into consideration the optimal values of the operating parameters. The laboratory scale leaching plant allowed the recovery of a high purity copper deposit (99.04 wt.%) at a current efficiency of 63.84% and specific energy consumption of 1.75 kWh/kg cooper. The gold concentration in the remained solid residue was 25 times higher than the gold concentration in the initial WPCB samples. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：215 / 221

页数：7

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