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

IF 10.1 1区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Engineering Pub Date : 2024-07-01 DOI:10.1016/j.eng.2023.12.002

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Abstract

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.

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从工业废水中高效回收金属：电位振荡和湍流模式下的电化学系统

从工业废水中高效回收金属有助于解决重金属对环境的危害和资源需求问题。传统的电沉积回收方法受到电荷转移反应中界面离子传输的限制，给同时快速、高质量地回收金属带来了挑战。因此，我们提出将瞬态电场（TE）和漩涡流（SF）结合起来，以同步增强批量传质和促进界面离子传输。我们研究了操作模式、瞬态频率和流速对金属回收的影响，从而确定了在 TE&SF 模式下快速高效地连续回收铜的最佳操作条件。这些条件包括 0 V 和 4 V 的低电平和高电平、50% 的占空比、1 kHz 的频率和 400 L-h-1 的流速。TE&SF 电沉积的动力学系数分别是单一 TE 和 SF 电沉积的 3.5-4.3 倍和 1.37-1.97 倍。通过模拟 TE 和 SF 条件下的沉积过程，证实了 TE 和 SF 协同作用下界面离子传输和电荷转移的高效协同，实现了快速、高质量的金属回收。因此，联合沉积策略被认为是减少金属污染和促进资源循环利用的有效技术。

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来源期刊

Engineering Environmental Science-Environmental Engineering

自引率

1.60%

发文量

335

审稿时长

35 days

期刊介绍： Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.