Removal of Diclofenac Sodium from Wastewater in Microbial Fuel Cell by Anode Modified with MnCo 2 O 4

Roya Morovati, Mohammad Hoseini, Abooalfazl Azhdarpoor, Mansooreh Dehghani, Mohammad Ali Baghapour () and Saeed Yousefinejad
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Roya Morovati: Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
Mohammad Hoseini: Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
Abooalfazl Azhdarpoor: Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
Mansooreh Dehghani: Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
Mohammad Ali Baghapour: Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
Saeed Yousefinejad: Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran

Sustainability, 2022, vol. 14, issue 21, 1-17

Abstract: Microbial fuel cell (MFC) with a modified anode is one of the new methods to increase MFC efficiency. This study synthesized an anode modified with cobalt manganese oxide (MnCo 2 O 4 @CF) on carbon felt (CF) by easy hydrothermal method and binder-free. Chemical oxygen demand (COD) was measured with and without diclofenac (DCF). According to SEM results, MnCo 2 O 4 was uniformly dispersed on the anode electrode surface. Moreover, the maximum power density in COD (1000 mg/L), 48 h. condition without DCF (726 mA/m 2 ) was 165 ± 0.012 mW/m 2 and with DCF concentration of 20 mg/L, it was 308 ± 0.013 mW/m 2 (992 mA/m 2 ). In addition, in the presence of 10 mg/L DCF concentration, the maximum COD removal efficiency was 82% ± 1.93 at 48 h. COD removal efficiency without DCF was 94.67% ± 0.02 at 72 h. After 72 h, the maximum removal efficiency of COD and DCF in the carbon anode was 41% ± 1.15 and 9.5% ± 0.23, respectively. Moreover, the maximum DCF removal efficiency using a MnCo 2 O 4 anode was 56% ± 0.55, at 48 h; the initial COD concentration was 500 mg/L, and the DCF concentration was 20 mg/L. This research showed that coating the anode with MnCo 2 O 4 could lead to the increased growth of microorganisms on the surface of the anode, decreased load transfer resistance, increased power density, and more removal of COD and DCF. As a result, the performance of fuel cells with modified anode and removal of DCF increased compared to anode with CF-MFC. Thus, the performance of fuel cells with modified anode and removal of DCF increased compared to anode with CF-MFC.

Keywords: anode modification; COD; diclofenac; manganese cobalt oxide; microbial fuel cell; power density (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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