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Updated: Jul 29, 2025
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
Copper recovery from printed circuit boards leaching solution with bioelectricity generation using microbial fuel
D Sobhani1, S O Rastegar2, M Khamforoush1
1Chemical Engineering Department, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran.
This study demonstrates high efficiency in recovering copper (Cu) from solutions using microbial fuel cells (MFCs). The developed MFC system achieved 99.7% copper recovery and generated significant power density.
Area of Science:
- Environmental Science
- Electrochemistry
- Biotechnology
Background:
- Printed circuit boards (PCBs) contain valuable metals like copper, posing environmental challenges.
- Efficient and sustainable methods for metal recovery from electronic waste are crucial.
Purpose of the Study:
- To investigate the performance of microbial fuel cells (MFCs) for copper (Cu) recovery from solutions.
- To optimize key operating parameters for enhanced Cu recovery and MFC power generation.
Main Methods:
- A dual-chamber MFC was constructed with carbon cloth electrodes and a Nafion membrane.
- Optimized parameters included catholyte (Cu2+ solution), anolyte (sodium acetate with sludge), electrode spacing, and batch operation time.
- Compared MFC performance with traditional sulfuric acid leaching for Cu recovery from PCB leachate.
Main Results:
- Achieved a maximum Cu recovery efficiency of 99.7% after 240 hours of batch operation.
- Generated a peak MFC power density of 102 mW/m² with 1 g/L Cu2+ catholyte and specific anolyte conditions.
- Recorded maximum open circuit voltage of 555 mV, current density of 347 mA/m², and power density of 193 mW/m².
- Sulfuric acid leaching recovered only 50% of Cu from PCB leachate in 48 hours.
Conclusions:
- MFCs offer a highly efficient and sustainable method for copper recovery from solutions compared to conventional leaching.
- The developed MFC system demonstrates potential for valuable metal recovery from electronic waste.
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