Environmentally Friendly Technology for Separating Gold from Waste Printed Circuit Boards: A Combination of Suspension Electrolysis and a Chlorination Process

2020 ◽  
Vol 8 (45) ◽  
pp. 16952-16959
Author(s):  
Jianbo Wang ◽  
Bo Zeng ◽  
Juan Lv ◽  
Yan Lu ◽  
Haiyan Chen
Keyword(s):  
Printed Circuit Boards ◽  
Environmentally Friendly ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Chlorination Process ◽  
Waste Printed Circuit Boards

Recycling gold and copper from waste printed circuit boards using chlorination process

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 8957-8964 ◽  
Author(s):  
Yuchen He ◽  
Zhenming Xu
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Selective Recovery ◽  
Printed Circuit ◽  
Efficient Process ◽  
Chlorination Process ◽  
Waste Printed Circuit Boards ◽  
Waste Pcbs ◽  
Pretreatment Processes

This study provides a less-polluted and more efficient process for selective recovery of gold and copper from waste PCBs through pretreatment processes.

LEACHING OF METALS FROM WASTE PRINTED CIRCUIT BOARDS (WPCBs) USING SULFURIC AND NITRIC ACIDS

2014 ◽  
Vol 13 (10) ◽  
pp. 2601-2607 ◽  
Author(s):  
Jae-chun Lee ◽  
Manoj Kumar ◽  
Min-Seuk Kim ◽  
Jinki Jeong ◽  
Kyoungkeun Yoo
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards

scholarly journals Effective Recovery Process of Copper from Waste Printed Circuit Boards Utilizing Recycling of Leachate

JOM ◽  
2020 ◽  
Author(s):  
Joona Rajahalme ◽  
Siiri Perämäki ◽  
Roshan Budhathoki ◽  
Ari Väisänen
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfuric Acid ◽  
Printed Circuit Boards ◽  
Sulfuric Acid Concentration ◽  
Recovery Process ◽  
Copper Recovery ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Acid Consumption

AbstractThis study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. Optimum leaching conditions for copper were found by using 3.6 mol L−1 sulfuric acid, 6 vol.% hydrogen peroxide, pulp density of 75 g L−1 with 186 min leaching time at 20°C resulting in complete leaching of copper followed by over 92% recovery and purity of 99.9% in the electrowinning. Study of chemical consumption showed total decomposition of hydrogen peroxide during leaching, while changes in sulfuric acid concentration were minor. During recirculation of the leachate with up to 5 cycles, copper recovery and product purity remained at high levels while acid consumption was reduced by 60%.

Sign in / Sign up

Export Citation Format

Share Document