Efficient Metal Recovery from Industrial Wastewater: Potential Oscillation and Turbulence Mode for Electrochemical System

Li Chen; Gong Zhang; Huijuan Liu; Shiyu Miao; Qingbai Chen; Huachun Lan; Jiuhui Qu

Engineering (Jul 2024)

Efficient Metal Recovery from Industrial Wastewater: Potential Oscillation and Turbulence Mode for Electrochemical System

Li Chen,
Gong Zhang,
Huijuan Liu,
Shiyu Miao,
Qingbai Chen,
Huachun Lan,
Jiuhui Qu

Affiliations

Li Chen: Corresponding authors.; Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Gong Zhang: Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Huijuan Liu: Corresponding authors.; Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Shiyu Miao: Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Qingbai Chen: Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Huachun Lan: Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Jiuhui Qu: Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China

Journal volume & issue: Vol. 38
pp. 184 – 193

Abstract

Read online

Efficient metal recovery from industrial wastewater facilitates addressing of the environmental hazards and resource requirements of heavy metals. The conventional electrodeposition recovery method is hampered by the limitations of interfacial ion transport in charge-transfer reactions, creating challenges for simultaneous rapid and high-quality metal recovery. Therefore, we proposed integrating a transient electric field (TE) and swirling flow (SF) to synchronously enhance bulk mass transfer and promote interfacial ion transport. We investigated the effects of the operation mode, transient frequency, and flow rate on metal recovery, enabling determination of the optimal operating conditions for rapid and efficient sequential recovery of Cu in TE&SF mode. These conditions included low and high electric levels of 0 and 4 V, a 50% duty cycle, 1 kHz frequency, and 400 L·h−1 flow rate. The kinetic coefficients of TE&SF electrodeposition were 3.5–4.3 and 1.37–1.97 times that of single TE and SF electrodeposition, respectively. Simulating the deposition process under TE and SF conditions confirmed the efficient concurrence of interfacial ion transport and charge transfer under TE and SF synergy, which achieved rapid and high-quality metal recovery. Therefore, the combined deposition strategy is considered an effective technique for reducing metal pollution and promoting resource recycling.

Published in Engineering

ISSN: 2095-8099 (Print); 2096-0026 (Online)
Publisher: Elsevier
Country of publisher: China
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/engineering

About the journal

Abstract

Keywords