Enhancing copper recovery and electricity generation from wastewater using low-cost membrane-less microbial fuel cell with a carbonized clay cup as cathode

Shu Hui Liu, Chi Yung Lai, Pei Hsuan Chang, Chi Wen Lin, Yu Hsiu Chen

Research output: Contribution to journalArticle

Abstract

The recovery of low concentrations of copper in wastewater for industrial reuses meets the goals of circular economy. This work develops a modified clay cup (MCC) that can be used as a cathode in a membrane-less microbial fuel cell (ML-MFC) because of its porosity, adsorption and conductivity. The ML-MFC was then used to treat copper-containing wastewater and generate electricity. Cu2+ is removed from wastewater and electricity produced primarily by the adsorption of Cu2+ in the wastewater onto the MCC, reducing its inhibitory effects on biodegradation. Cu2+ in wastewater can be reduced in an MFC to form copper-containing compounds on the surface of the MCC. Cu2O can be used as a catalyst to modify the cathode to improve electricity production. In seven days ML-MFC with a power density of 113.7 mW/m2 removed 96.5% of the Cu2+. At neutral pH, Cu2O was observed on the surface of the MCC and modification of cathode reduced the internal resistance of the ML-MFC by 30%, increasing the output voltage. Cyclic voltammetry revealed a redox peak current at pH 7 that was 1.11–5.45 times under other conditions. This work demonstrates the feasibility of using an MCC cathode to increase the recovery of Cu2+ and the generation of electricity by an MFC.

Original languageEnglish
Article number119118
JournalJournal of Cleaner Production
Volume247
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

Microbial fuel cells
electricity generation
fuel cell
Clay
Wastewater
Cathodes
Electricity
membrane
copper
Membranes
Copper
electricity
wastewater
Recovery
clay
cost
Costs
copper compound
adsorption
Adsorption

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "The recovery of low concentrations of copper in wastewater for industrial reuses meets the goals of circular economy. This work develops a modified clay cup (MCC) that can be used as a cathode in a membrane-less microbial fuel cell (ML-MFC) because of its porosity, adsorption and conductivity. The ML-MFC was then used to treat copper-containing wastewater and generate electricity. Cu2+ is removed from wastewater and electricity produced primarily by the adsorption of Cu2+ in the wastewater onto the MCC, reducing its inhibitory effects on biodegradation. Cu2+ in wastewater can be reduced in an MFC to form copper-containing compounds on the surface of the MCC. Cu2O can be used as a catalyst to modify the cathode to improve electricity production. In seven days ML-MFC with a power density of 113.7 mW/m2 removed 96.5{\%} of the Cu2+. At neutral pH, Cu2O was observed on the surface of the MCC and modification of cathode reduced the internal resistance of the ML-MFC by 30{\%}, increasing the output voltage. Cyclic voltammetry revealed a redox peak current at pH 7 that was 1.11–5.45 times under other conditions. This work demonstrates the feasibility of using an MCC cathode to increase the recovery of Cu2+ and the generation of electricity by an MFC.",
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Enhancing copper recovery and electricity generation from wastewater using low-cost membrane-less microbial fuel cell with a carbonized clay cup as cathode. / Liu, Shu Hui; Lai, Chi Yung; Chang, Pei Hsuan; Lin, Chi Wen; Chen, Yu Hsiu.

In: Journal of Cleaner Production, Vol. 247, 119118, 20.02.2020.

Research output: Contribution to journalArticle

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