Ultrasound-driven in-situ reactive oxygen species' generation boosting advanced oxidation leaching of sulfide ores

Leaching is of great importance to extract valuable metals in metallurgy. However, conventional sulfide leaching methods rely on oxidation process, often requiring expensive oxidants or high-pressure conditions, which lead to high cost, impurity contamination, and safety risks. Here, we introduce a...

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Published inChemical engineering journal (Lausanne, Switzerland : 1996) Vol. 520; p. 166226
Main Authors Zhu, Enpei, Luo, Chao, Zhao, Shengxuan, Zhu, Li, Chen, Zhiqi, Duan, Macong, Xia, Hongying, Wang, Shixing, Dai, Linqing, Zhang, Gengwei, Fu, Likang, Liu, Jian, Zuo, Yonggang, Zhang, Libo
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.09.2025
Subjects
Green metallurgy
Oxidation leaching
Reactive oxygen species
Sulfides
Ultrasonic
Sulfides
Reactive oxygen species
Oxidation leaching
Green metallurgy
Ultrasonic
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Summary:Leaching is of great importance to extract valuable metals in metallurgy. However, conventional sulfide leaching methods rely on oxidation process, often requiring expensive oxidants or high-pressure conditions, which lead to high cost, impurity contamination, and safety risks. Here, we introduce a novel sulfide leaching strategy based on the advanced oxidation processes (AOPs) driven by ultrasound. This approach leverages ultrasonic-induced electron transfer at the solid-liquid (SiO2/H2O) interface to generate abundant reactive oxygen species (ROS), including hydroxyl (·OH) and superoxide (·O2−) radicals, eliminating the need for conventional oxidants or high-pressure conditions. Recyclable SiO2 serves as the catalytic medium, demonstrating excellent stability with indium leaching efficiencies maintained above 97 % over five cycles. It enables efficient and sustainable leaching of sulfide under ultrasonic activation. This strategy offers an efficient and economical alternative for sulfide leaching, aligning with the goals of green metallurgy. [Display omitted] •Ultrasound-driven advanced oxidative leaching (AOL) technology.•Efficient sulfide metal extraction and sustainable process design.•Low-cost and recyclable silicon dioxide (SiO2) catalysts drive green reactions.•AOL technology metallurgical process multi-scene adaptation.
ISSN:1385-8947
DOI:10.1016/j.cej.2025.166226