Effect of operational parameters on the leaching efficiency and recovery of heavy metals from computer printed circuit boards

2015 ◽  
Vol 91 (7) ◽  
pp. 2038-2046 ◽  
Author(s):  
Suthee Janyasuthiwong ◽  
Riccardo Ugas ◽  
Eldon R Rene ◽  
Carucci Alessandra ◽  
Giovanni Esposito ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Operational Parameters ◽  
Printed Circuit ◽  
Leaching Efficiency

Effects of operational parameters on the bio-assisted leaching of metals from pyrolized printed circuit boards

2019 ◽  
Vol 134 ◽  
pp. 16-22 ◽  
Author(s):  
Muhammad Arinanda ◽  
Quentin van Haute ◽  
Fanny Lambert ◽  
Stoyan Gaydardzhiev
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Operational Parameters ◽  
Printed Circuit

Metal Leaching Efficiency from Waste Printed Circuit Boards by Inorganic Acid

2019 ◽  
Vol 45 (3) ◽  
pp. 355-362
Author(s):  
Zhenfeng Xiong ◽  
Ying Huang ◽  
Kemei Zhou ◽  
Dong Zhang ◽  
Juan Bao ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Printed Circuit Boards ◽  
Base Metals ◽  
Circuit Boards ◽  
Aqua Regia ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Inorganic Acids ◽  
Mass Fractions ◽  
Leaching Efficiency

Waste printed circuit boards (WPCBs) from personal computers were ground and subjected to a two-step leaching process using two inorganic acids (nitric acid and aqua regia) to leach metals. Three kinds of samples were used: the whole WPCB, the golden finger part, and the WPCB excluding the golden finger. Leaching efficiencies of metals from these samples for different nitric acid concentrations (followed by aqua regia) were evaluated to identify the best concentration of nitric acid. The extracted Au concentration from the golden finger was 5.5 times of that from the whole WPCB board. Metals that compete with Au, such as Ni and Fe, have lower mass fractions in the whole WPCB board compared to those in the golden finger. However, Cu comprises a higher proportion in the golden finger. Au can be effectively separated from most other metals by initially leaching the ground WPCB with 5M nitric acid, followed by leaching with aqua regia. Considering the high leaching proportion of Au, it is advantageous to leach Au and base metals separately from the golden finger and from WPCB excluding the golden finger.

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.

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

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).

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