Interfacial kinetics regulation and electrochemical optimization in ultrasonic-induced sponge cadmium nucleation.

IF 9.7 1区 化学 Q1 ACOUSTICS
Ultrasonics Sonochemistry Pub Date : 2025-09-01 Epub Date: 2025-07-31 DOI:10.1016/j.ultsonch.2025.107491
Pengcheng Zhang, Hongliang Liu, Shixing Wang, Jinliang Zhang, Qingjian Chen, Likang Fu, Zhuoyu Yin, Fei Tang, Xin Zuo, Libo Zhang
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引用次数: 0

Abstract

The cementation method has become the dominant method for recovering cadmium from copper-cadmium slag leach solution due to its low cost and safety features. However, the conventional method has several limitations, including low zinc powder utilization, low sponge cadmium purity, and an extended production cycle. These limitations primarily stem from zinc powder agglomeration and the subsequent coverage of zinc particles by the product layer. In this study, the ultrasonic-enhanced zinc powder cementation process is proposed. Ultrasonic effectively dissociates the agglomeration and accelerate the reaction rate, improving the utilization of zinc powder and the grade of sponge cadmium. The cadmium cementation efficiency and the grade of sponge cadmium are increased by 24.56 % and 23.11 %. Kinetic experiments reveal that ultrasonic reduced the apparent activation energy by 21.34 kJ/mol. Moreover, the reduction potential exhibits a positive shift from -2.731 V to -2.432 V (vs. SCE). The current density increases from 0.146 A/cm2 to 0.199 A/cm2. The self-corrosion potential reduces from -1.411 V to -1.453 V (vs. SCE). Simple economic analysis indicates that the benefits under ultrasonic method are significantly higher than conventional method. This work provides new insights into the application of ultrasonic in the recovery of cadmium from copper-cadmium slag.

超声诱导海绵镉成核界面动力学调控及电化学优化。
胶结法因其成本低、安全等优点,已成为回收铜镉渣浸出液中镉的主要方法。然而,传统方法存在锌粉利用率低、海绵镉纯度低、生产周期长等局限性。这些限制主要源于锌粉团聚和随后的锌颗粒覆盖的产品层。本研究提出了超声强化锌粉胶结工艺。超声波能有效解离结块,加快反应速度,提高了锌粉的利用率和海绵镉的品位。镉的胶结效率和海绵镉的品位分别提高了24.56%和23.11%。动力学实验表明,超声波使表观活化能降低21.34 kJ/mol。此外,还原电位呈现出从-2.731 V到-2.432 V的正位移(相对于SCE)。电流密度从0.146 A/cm2增加到0.199 A/cm2。自腐蚀电位从-1.411 V降低到-1.453 V(相对于SCE)。简单的经济分析表明,超声法的经济效益明显高于常规方法。本研究为超声波在铜镉渣中回收镉的应用提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ultrasonics Sonochemistry
Ultrasonics Sonochemistry 化学-化学综合
CiteScore
15.80
自引率
11.90%
发文量
361
审稿时长
59 days
期刊介绍: Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels. Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.
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