A continuous flow-through system with integration of electrosorption and peroxi-coagulation for efficient removal of organics

A flow-through reactor with integration of electrosorption (ES) and peroxi-coagulation (PC) processes was designed for organics removal. Impacts of key parameters (solution pH, flow rate, initial concentration of organics, applied voltage) on the removal efficiency of Orange II were explored. Under the optimized conditions, 93% removal efficiency and 1043 mg g(-1) removal capacity of Orange II could be obtained with an energy consumption of 31.9 kWh m(-3) order(-1). Controlled experiments of ES for pollutants removal, and the detections of dissolved irons and the generated hydroxyl radicals (-OH) were conducted, demonstrating the coupling effect and contribution ratio of ES and PC for organics removal in this flow-through system. The spatiotemporal efficiency of the integrated flow-through systemwas more than 10 times of conventional ES system, providing more potential for practical application of waste-water treatment. The flow-through system was also verified to be advantageous for removal of other organic pollutants including 2,4-dichlorophenoxyacetic acid, phenol and methylene blue with high removal efficiencies. This study proved that the integrated flow-through process was an efficient, comparative and applicable method for wastewater treatment. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

A flow-through reactor integrating ES and PC processes was designed for organics removal, with optimized conditions achieving high removal efficiency and low energy consumption. The coupling effect of ES and PC in the flow-through system was demonstrated, showing more than 10 times greater efficiency compared to conventional ES systems. The system was also effective in removing other organic pollutants with high efficiencies, proving to be an efficient and practical method for wastewater treatment.