Ultrasonic-assisted hydrogen peroxide leaching of cadmium-containing flue dust under room temperature and neutral conditions: Efficient recovery and mechanism

IF 9.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry Pub Date : 2025-07-19 DOI:10.1016/j.ultsonch.2025.107467

Yuxi Xie , Tian Wang , Yuanru Wang , Yan Gao , Shihao Liu , Fei Niu , Phan Duc Lenh , Thiquynhxuan Le , Libo Zhang

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Abstract

A novel ultrasonic-enhanced hydrogen peroxide leaching method is proposed for efficient cadmium recovery from flue dust under room temperature and neutral conditions, addressing the limitations of conventional methods such as low efficiency and environmental pollution. Under optimal conditions (room temperature, 5 mL H₂O₂, 2:1 liquid–solid ratio, 20 min, and 360 W ultrasonic power), the cadmium leaching efficiency reaches 96.76 %, significantly higher than the conventional oxidative leaching efficiency of 88.57 %. Mechanistic studies indicate that ultrasound inhibits particle agglomeration, disrupts encapsulated structures, and generates hydroxyl radicals, enhancing oxidation of cadmium and lead-containing phases for efficient separation. Kinetic studies reveal that the introduction of ultrasound reduces the activation energy from 16.198 to 3.389 kJ·mol⁻¹, changing the rate-determining step from a mixed control to diffusion control, thereby accelerating leaching kinetics. This method not only enhances cadmium recovery but also reduces environmental impact, offering a greener and more efficient solution for the lead smelting industry.

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常温和中性条件下超声波辅助过氧化氢浸出含镉烟道粉尘：高效回收及机理

针对传统方法效率低、污染环境等缺点，提出了一种在室温和中性条件下从烟道粉尘中高效回收镉的超声强化过氧化氢浸出新方法。在最佳条件下（室温、5 mL H2O2、2:1液固比、20 min、360 W超声功率），镉浸出率达到96.76 %，显著高于常规氧化浸出率88.57 %。机理研究表明，超声抑制颗粒团聚，破坏包封结构，产生羟基自由基，促进镉和铅相的氧化，实现有效分离。动力学研究表明，超声波的引入使浸出过程的活化能从16.198降低到3.389 kJ·mol−1，使浸出过程的速率决定步骤由混合控制转变为扩散控制，从而加快了浸出动力学。该方法不仅提高了镉的回收率，而且减少了对环境的影响，为铅冶炼行业提供了更环保、更高效的解决方案。

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来源期刊

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.