Effectiveness of biophotovoltaics system modified with fuller-clay composite separators for chromium removal

The performance of biophotovoltaics (BPVs) having clay separators modified with 10, 15, and 20% of Fuller's earth-material (FEM) to improve the cation exchange capacity was assessed on the basis of wastewater treatment and electrochemical analyses. Among the three variants of clay separators ot...

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Bibliographic Details
Published in:Electrochimica acta 2022-09, Vol.426, p.140714, Article 140714
Main Authors: Gunaseelan, K., Jadhav, Dipak A., Pant, Deepak, Gajalakshmi, S.
Format: Article
Language:English
Subjects:
Biophotovoltaic system
Cation exchanger
Chromium reduction
Clay composite separators
Electrochemical analyses
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Summary:The performance of biophotovoltaics (BPVs) having clay separators modified with 10, 15, and 20% of Fuller's earth-material (FEM) to improve the cation exchange capacity was assessed on the basis of wastewater treatment and electrochemical analyses. Among the three variants of clay separators other than the commercial proton exchange membrane (PEM), clay separator modified with 15% of FEM resulted in peak power density (7.87 W/m3) with high organic matter removal (82 ± 3.78%) and Cr (VI) reduction (94 ± 0.85%). FEM provides cationic sites enhancing the proton transfer rate as confirmed from the electrochemical analysis. Membrane characterization also showed high proton transfer coefficient with low membrane resistance in FEM-15%. This first ever study on the utilization of the low-cost 15% FEM clay separator BPV achieved high power outputs and proved its suitability for field-scale applications due to its long-term stability, and thus can be an alternate to the costly polymeric membrane. [Display omitted]
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2022.140714