Recovery of heavy metals from waste printed circuit boards: statistical optimization of leaching and residue characterization

2019 ◽  
Vol 26 (24) ◽  
pp. 24417-24429 ◽  
Author(s):  
Rasoul Khayyam Nekouei ◽  
Farshid Pahlevani ◽  
Rabeeh Golmohammadzadeh ◽  
Mohammad Assefi ◽  
Ravindra Rajarao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Printed Circuit Boards ◽  
Statistical Optimization ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards

Behaviour of zinc during the process of leaching copper from WPCBs by typical acidic ionic liquids

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34921-34926 ◽  
Author(s):  
Mengjun Chen ◽  
Jiqin Wang ◽  
Jinxiu Huang ◽  
Haiyan Chen
Keyword(s):  
Heavy Metals ◽  
Ionic Liquids ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Leaching Behavior ◽  
Printed Circuit ◽  
Leaching Process ◽  
Waste Printed Circuit Boards ◽  
Copper And Zinc ◽  
Acidic Ionic Liquids

The leaching behavior of zinc, representing heavy metals, during the process of recycling copper in typical acidic ionic liquids from waste printed circuit boards was examined and the connection between copper and zinc during the leaching process was investigated in detail.

A long-term static immersion experiment on the leaching behavior of heavy metals from waste printed circuit boards

2014 ◽  
Vol 16 (8) ◽  
pp. 1967-1974 ◽  
Author(s):  
Guo-hua Zhao ◽  
Xing-zhang Luo ◽  
Gui Chen ◽  
Yong-jun Zhao
Keyword(s):  
Heavy Metals ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Leaching Behavior ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Immersion Experiment ◽  
Main Components ◽  
Static Immersion

Printed circuit boards (PCBs) are the main components of electrical and electronic equipment (EEE).

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%.

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