Sustainable electrochemical process for recovery of metal ions in synthetic mining wastewater and their utilization in photocathodic CO2 reduction into formic acid

G. Bharath; Abdul Hai; K. Rambabu; Mohammad Abu Haija; Fawzi Banat

doi:10.1016/j.resconrec.2022.106778

Sustainable electrochemical process for recovery of metal ions in synthetic mining wastewater and their utilization in photocathodic CO₂ reduction into formic acid

G. Bharath, Abdul Hai, K. Rambabu, Mohammad Abu Haija, Fawzi Banat

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The recovery and utilization of metal ions from mining and industrial wastewater are highly desirable to turn waste into wealth. Herein, polyaniline decorated date seed-derived activated carbon (PANI-DSAC) has been successfully used as an electrode for the capacitive deionization of Fe²⁺ and Cu²⁺ ions in synthetic mining wastewater. Symmetrical assembly of the PANI-DSAC CDI electrodes recovered 99% of the Fe²⁺ and Cu²⁺ ions from synthetic mining wastewater via several redox reactions. The mechanism of redox reactions and electrosorption of multiple metal ions has been demonstrated. In addition, the recovered metal ions by PANI-DSAC were then successfully converted to CuFe₂O₄/CFs-DSAC via the thermochemical conversion process. Further, CuFe₂O₄/CFs-DSAC was successfully used as a photocathode to reduce CO₂ into formic acid. The results demonstrate that recovered valuable metal ions from mining wastewater can be utilized to fabricate high-performing functional electrocatalytic materials for energy conversion and storage applications.

Original language	British English
Article number	106778
Journal	Resources, Conservation and Recycling
Volume	190
DOIs	https://doi.org/10.1016/j.resconrec.2022.106778
State	Published - Mar 2023

Keywords

Capacitive deionization
Carbon neutrality
Photoelectrochemical CO reduction
Recovery of metal ions
Symmetric electrodes
Waste into wealth

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.resconrec.2022.106778

Cite this

@article{859c0e907dda4884b08a948aadd0a0e5,

title = "Sustainable electrochemical process for recovery of metal ions in synthetic mining wastewater and their utilization in photocathodic CO2 reduction into formic acid",

abstract = "The recovery and utilization of metal ions from mining and industrial wastewater are highly desirable to turn waste into wealth. Herein, polyaniline decorated date seed-derived activated carbon (PANI-DSAC) has been successfully used as an electrode for the capacitive deionization of Fe2+ and Cu2+ ions in synthetic mining wastewater. Symmetrical assembly of the PANI-DSAC CDI electrodes recovered 99% of the Fe2+ and Cu2+ ions from synthetic mining wastewater via several redox reactions. The mechanism of redox reactions and electrosorption of multiple metal ions has been demonstrated. In addition, the recovered metal ions by PANI-DSAC were then successfully converted to CuFe2O4/CFs-DSAC via the thermochemical conversion process. Further, CuFe2O4/CFs-DSAC was successfully used as a photocathode to reduce CO2 into formic acid. The results demonstrate that recovered valuable metal ions from mining wastewater can be utilized to fabricate high-performing functional electrocatalytic materials for energy conversion and storage applications.",

keywords = "Capacitive deionization, Carbon neutrality, Photoelectrochemical CO reduction, Recovery of metal ions, Symmetric electrodes, Waste into wealth",

author = "G. Bharath and Abdul Hai and K. Rambabu and Haija, {Mohammad Abu} and Fawzi Banat",

note = "Funding Information: This study was financially supported by Khalifa University of Science and Technology, Abu Dhabi , through an internal grant CIRA-2020-085 . Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2023",

month = mar,

doi = "10.1016/j.resconrec.2022.106778",

language = "British English",

volume = "190",

journal = "Resources, Conservation and Recycling",

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T1 - Sustainable electrochemical process for recovery of metal ions in synthetic mining wastewater and their utilization in photocathodic CO2 reduction into formic acid

AU - Bharath, G.

AU - Hai, Abdul

AU - Rambabu, K.

AU - Haija, Mohammad Abu

AU - Banat, Fawzi

N1 - Funding Information: This study was financially supported by Khalifa University of Science and Technology, Abu Dhabi , through an internal grant CIRA-2020-085 . Publisher Copyright: © 2022 Elsevier B.V.

PY - 2023/3

Y1 - 2023/3

N2 - The recovery and utilization of metal ions from mining and industrial wastewater are highly desirable to turn waste into wealth. Herein, polyaniline decorated date seed-derived activated carbon (PANI-DSAC) has been successfully used as an electrode for the capacitive deionization of Fe2+ and Cu2+ ions in synthetic mining wastewater. Symmetrical assembly of the PANI-DSAC CDI electrodes recovered 99% of the Fe2+ and Cu2+ ions from synthetic mining wastewater via several redox reactions. The mechanism of redox reactions and electrosorption of multiple metal ions has been demonstrated. In addition, the recovered metal ions by PANI-DSAC were then successfully converted to CuFe2O4/CFs-DSAC via the thermochemical conversion process. Further, CuFe2O4/CFs-DSAC was successfully used as a photocathode to reduce CO2 into formic acid. The results demonstrate that recovered valuable metal ions from mining wastewater can be utilized to fabricate high-performing functional electrocatalytic materials for energy conversion and storage applications.

AB - The recovery and utilization of metal ions from mining and industrial wastewater are highly desirable to turn waste into wealth. Herein, polyaniline decorated date seed-derived activated carbon (PANI-DSAC) has been successfully used as an electrode for the capacitive deionization of Fe2+ and Cu2+ ions in synthetic mining wastewater. Symmetrical assembly of the PANI-DSAC CDI electrodes recovered 99% of the Fe2+ and Cu2+ ions from synthetic mining wastewater via several redox reactions. The mechanism of redox reactions and electrosorption of multiple metal ions has been demonstrated. In addition, the recovered metal ions by PANI-DSAC were then successfully converted to CuFe2O4/CFs-DSAC via the thermochemical conversion process. Further, CuFe2O4/CFs-DSAC was successfully used as a photocathode to reduce CO2 into formic acid. The results demonstrate that recovered valuable metal ions from mining wastewater can be utilized to fabricate high-performing functional electrocatalytic materials for energy conversion and storage applications.

KW - Capacitive deionization

KW - Carbon neutrality

KW - Photoelectrochemical CO reduction

KW - Recovery of metal ions

KW - Symmetric electrodes

KW - Waste into wealth

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