Recycling of discarded mobile printed circuit boards for extraction of gold and copper

被引：30

作者：

Barnwal, Amit ^{[1
]}

Dhawan, Nikhil ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 247667, Uttarakhand, India

来源：

SUSTAINABLE MATERIALS AND TECHNOLOGIES | 2020年 / 25卷

关键词：

Mobile PCB; Fluidization; Copper; Gold; Leaching; ELECTRONIC EQUIPMENT; SOLVENT-EXTRACTION; SECONDARY SOURCES; METALS RECOVERY; SILVER; SEPARATION; ELECTRODEPOSITION; THIOSULFATE; PCBS;

D O I：

10.1016/j.susmat.2020.e00164

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigates the recycling of mobile printed circuit boards through physical treatment followed by hydrometallurgical processing. Copper dissolution of the feed and processed fractions using different lixiviants were studied. Fluidization provided an effective separation of metallic values, and 88% carbon removal were observed. The ferrous fraction was separated using a low-intensity magnetic separator. Cu and Au dissolution in the treated sample was many folds higher compared to the feed sample. The acid consumption for the treated fraction is quite low compared to the feed sample 44-45 ml / g. It was found-75% extraction efficiency with a purity of-97% Cu was extracted using electrodeposition. Au was successfully precipitated from leach solution using urea, followed by sodium bisulfite. Finally, it can be concluded 4.1 g Au and 9 kg Cu can be recovered from 10 kg treated mobile printed circuit boards. (c) 2020 Elsevier B.V. All rights reserved.

引用

页数：11

共 46 条

[1] Precious metal recovery from waste printed circuit boards using cyanide and non-cyanide lixiviants - A review [J].

Akcil, Ata ;

Erust, Ceren ;

Gahan, Chandra Sekhar ;

Ozgun, Mehmet ;

Sahin, Merve ;

Tuncuk, Aysenur .

WASTE MANAGEMENT, 2015, 45 :258-271

[2] Sustainable recovery of Cu, Fe and Zn from end-of-life printed circuit boards [J].

Amato, Alessia ;

Becci, Alessandro ;

Beolchini, Francesca .

RESOURCES CONSERVATION AND RECYCLING, 2020, 158

[3] Investigation of Discarded Printed Circuit Boards for Recovery of Copper Values [J].

Barnwal, Amit ;

Dhawan, Nikhil .

JOM, 2020, 72 (08) :2983-2992

[4] Recovery of copper values from discarded random access memory cards via fluidization and thermal exposure [J].

Barnwal, Amit ;

Dhawan, Nikhil .

JOURNAL OF CLEANER PRODUCTION, 2020, 256

[5] Evaluation of Fluidization Process for Recovery of Metals from Discarded Printed Circuit Boards [J].

Barnwal, Amit ;

Dhawan, Nikhil .

JOURNAL OF SUSTAINABLE METALLURGY, 2019, 5 (04) :519-527

[6] Comparison of different routes for recovery of metals from electronic scrap [J].

Barnwal, Amit ;

Vishvakarma, Shubham ;

Dhawan, Nikhil .

MATERIALS TODAY-PROCEEDINGS, 2018, 5 (09) :17046-17054

[7] Kinetic Investigation and Dissolution Behavior of Cyanide Alternative Gold Leaching Reagents [J].

Birich, Alexander ;

Stopic, Srecko ;

Friedrich, Bernd .

SCIENTIFIC REPORTS, 2019, 9 (1)

[8] The deposition of metal nanoparticles on carbon surfaces: the role of specific functional groups [J].

Bowden, B. ;

Davies, M. ;

Davies, P. R. ;

Guan, S. ;

Morgan, D. J. ;

Roberts, V. ;

Wotton, D. .

FARADAY DISCUSSIONS, 2018, 208 :455-470

[9] Generation of copper rich metallic phases from waste printed circuit boards [J].

Cayumil, R. ;

Khanna, R. ;

Ikram-Ul-Haq, M. ;

Rajarao, R. ;

Hill, A. ;

Sahajwalla, V. .

WASTE MANAGEMENT, 2014, 34 (10) :1783-1792

[10] Pyrolysis characteristics of integrated circuit boards at various particle sizes and temperatures [J].

Chiang Hung-Lung ;

Lin Kuo-Hsiung ;

Lai Mei-Hsiu ;

Chen Ting-Chien ;

Ma Sen-Yi .

JOURNAL OF HAZARDOUS MATERIALS, 2007, 149 (01) :151-159

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