Overview of recent developments of resource recovery from wastewater via electrochemistry-based technologies

Liu, Yuan; Deng, Yingying; Zhang, Qi; Liu, Hong

doi:10.1016/j.scitotenv.2020.143901

Cited by 73 publications

(31 citation statements)

References 239 publications

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“…However, a rise in the concentration of Ag + caused a decrease in more power density and Columbian efficacy because of Ag + from the cathodic chamber to the anodic chamber, resulting in bio-anodic intoxication. Electrochemical coagulation has been used for the disposal of a gold and silver industrial effluent containing cyanide [ 11 ]. With optimum operating conditions, (99.43%) of the silver and (99.59%) of the gold were removed.…”

Section: Resources From Industrial Wastewatermentioning

confidence: 99%

“…Electrochemical technology is used for the treatment of wastewater. Without the addition of chemicals; nutrients, hydrogen, sulfur, metallic ions, and chemical components can be retrieved through EC precipitation, EC oxidation-reduction, electrochemical stripping, and electrochemical membrane processes [11,12]. Both membrane and biological processes enhance the efficiency and cleanliness of products [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Recovery of resources from industrial wastewater employing electrochemical technologies: status, advancements and perspectives

et al. 2021

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In the last two decades, water use has increased at twice the rate of population growth. The freshwater resources are getting polluted by contaminants like heavy metals, pesticides, hydrocarbons, organic waste, pathogens, fertilizers, and emerging pollutants. Globally more than 80% of the wastewater is released into the environment without proper treatment. Rapid industrialization has a dramatic effect on developing countries leading to significant losses to economic and health well-being in terms of toxicological impacts on humans and the environment through air, water, and soil pollution. This article provides an overview of physical, chemical, and biological processes to remove wastewater contaminants. A physical and/or chemical technique alone appears ineffective for recovering useful resources from wastewater containing complex components. There is a requirement for more processes or processes combined with membrane and biological processes to enhance operational efficiency and quality. More processes or those that are combined with biological and membrane-based processes are required to enhance operational efficiencies and quality. This paper intends to provide an exhaustive review of electrochemical technologies including microbial electrochemical technologies. It provides comprehensive information for the recovery of metals, nutrients, sulfur, hydrogen, and heat from industrial effluents. This article aims to give detailed information into the advancements in electrochemical processes to energy use, improve restoration performance, and achieve commercialization. It also covers bottlenecks and perspectives of this research area.

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Section: Resources From Industrial Wastewatermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recovery of resources from industrial wastewater employing electrochemical technologies: status, advancements and perspectives

et al. 2021

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“…Several review articles have illustrated the application of ETs in wastewater treatment, including P removal by traditional electrochemical process (i.e., electrocoagulation) (Feng et al, 2016;Guedes et al, 2014;Li et al, 2020;Liu et al, 2020b;Muddemann et al, 2019;Nancharaiah et al, 2016;Perera et al, 2019;Tabassum et al, 2021). EMP is different from electrochemical coagulation.…”

Section: Introductionmentioning

confidence: 99%

Electrochemically mediated precipitation of phosphate minerals for phosphorus removal and recovery: Progress and perspective

Wang

Kuntke

Saakes³

et al. 2022

Water Research

117

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Phosphorus (P) is an essential element for the growth and reproduction of organisms. Unfortunately, the natural P cycle has been broken by the overexploitation of P ores and the associated discharge of P into water bodies, which may trigger the eutrophication of water bodies in the short term and possible P shortage soon. Consequently, technologies emerged to recover P from wastewater to mitigate pollution and exploit secondary P resources. Electrochemically induced phosphate precipitation has the merit of achieving P recovery without dosing additional chemicals via creating a localized high pH environment near the cathode. We critically reviewed the development of electrochemically induced precipitation systems toward P removal and recovery over the past ten years. We summarized and discussed the effects of pH, current density, electrode configuration, and water matrix on the performance of electrochemical systems. Next to ortho P, we identified the potential and illustrated the mechanism of electrochemical P removal and recovery from non-ortho P compounds by combined anodic or anode-mediated oxidation and cathodic reduction (precipitation). Furthermore, we assessed the economic feasibility of electrochemical methods and concluded that they are more suitable for treating acidic P-rich waste streams. Despite promising potentials and significant progress in recent years, the application of electrochemical systems toward P recovery at a larger scale requires further research and development. Future work should focus on evaluating the system's performance under long-term operation, developing an automatic process for harvesting P deposits, and performing a detailed economic and life-cycle assessment.

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“…An electrogenerative system promises an attractive treatment system compared to other electrochemical separation processes such as electrowinning and electrodialysis. [2][3][4][5][6] The obvious advantages of an electrogenerative system are that it generates an external flow of current as by-product; it is able to recover a low concentration of ion from a diluted solution, as opposed to an electrolytic process; ease of operation, because of simple process configuration; low maintenance requirement; and, finally, electrogenerative reactors can be operated in various configurations and designs. Several applications of electrogenerative system such as recovery of metal ions in diluted solutions have been reported and the results were comparable to other treatment technologies.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical recovery of low concentration of palladium from palladium(II) chloride of electroplating wastewater

Mansor

Mohamed

Suah

2021

J of Chemical Tech & Biotech

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BACKGROUND: An electrochemical recovery of low concentration of palladium from a diluted palladium(II) chloride electroplating wastewater is presented. The electrochemical method used was an electrogenerative system which operated with a batch reactor.RESULTS: A three-dimensional cathode material of reticulated vitreous carbon (RVC) appeared to give the reactor less polarization compared to a three-dimensional porous graphite and two-dimensional stainless steel. Mass transport study confirmed RVC as the most suitable cathode in this electrogenerative system. The generated flow current of this system was supported by high performance of zinc as anode, compared to aluminium. Sulfuric acid served as the best cathode activation solution, having the highest recovery rate, with >90% of palladium being recovered in 5 h. Low concentrations of palladium(II) chloride solutions (100-500 mg L −1 ) were recovered at pH 5. Scanning electron microscopy-energy-dispersive X-ray spectroscopy was used for qualitative and quantitative analysis of deposited palladium on the cathode. It was shown that a pure metallic palladium deposits from chloride solution were obtained. Finally, the developed electrochemical reactor was also used to recover palladium from diluted electroplating wastewaters, and the results were satisfactory (>90% recovery).CONCLUSION: This research shows that the electrogenerative system has the potential to recover palladium from diluted electroplating wastewaters.

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Overview of recent developments of resource recovery from wastewater via electrochemistry-based technologies

Cited by 73 publications

References 239 publications

Recovery of resources from industrial wastewater employing electrochemical technologies: status, advancements and perspectives

Recovery of resources from industrial wastewater employing electrochemical technologies: status, advancements and perspectives

Electrochemically mediated precipitation of phosphate minerals for phosphorus removal and recovery: Progress and perspective

Electrochemical recovery of low concentration of palladium from palladium(II) chloride of electroplating wastewater

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