Mechanism and kinetics study of vanadium leaching from landfilled metallurgical residues by ultrasonic with ozonation enhancement in a low-acid medium

IF 8.7 1区 化学 Q1 ACOUSTICS
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Abstract

Landfilled metallurgical residues are valuable raw materials for the recovery of strategic vanadium resources. However, efficient separation of vanadium from these residues is challenging due to its strong oxidation resistance and coating within silicate inclusions. To address this issue, this study proposes an enhanced leaching process utilizing the synergistic effect of O3-catalyzed ultrasonic field in a low concentration sulfuric acid system. Results show that following a 10-minute O3 and ultrasonic treatment, the direct leaching rate of vanadium experienced a remarkable 46.7 % increase. Quenching experiments revealed a hierarchical order of active species within the reaction process:⋅OH >⋅O2> H+, with⋅OH oxidation exhibiting the most pronounced capacity for disrupting the inclusion structure. Electron Paramagnetic Resonance analysis indicated that the highest⋅OH yield arose from the combined application of ultrasound and ozone. Kinetic investigations demonstrated that the vanadium leaching process is governed by interfacial chemical reactions. The activation energy of vanadium oxidation leaching under ultrasonic-O3 conditions was determined to be 40.41 kJ/mol, representing a 20.19 % reduction compared to ultrasonic conditions alone. Through the integration of analysis, characterization, and comparative evaluations, it was discerned that the synergistic impact of ultrasonic and ozone treatments significantly enhances the breakdown of silicate inclusions by low-concentration HF, particularly in the conversion of SiOSi bonds into SiOH bonds and SiF bonds. In summary, the refined leaching methodology incorporating ozone catalysis in conjunction with ultrasonic treatment provides a new idea for the separation and extraction of refractory residual vanadium.

在低酸介质中通过臭氧强化超声波从填埋冶金残渣中沥滤钒的机理和动力学研究
填埋的冶金残渣是回收战略钒资源的宝贵原料。然而,由于钒具有很强的抗氧化性并被包裹在硅酸盐夹杂物中,从这些残渣中高效分离钒具有挑战性。为解决这一问题,本研究提出了一种强化浸出工艺,在低浓度硫酸体系中利用 O3 催化超声场的协同效应。结果表明,经过 10 分钟的 O3 和超声波处理后,钒的直接浸出率显著提高了 46.7%。淬火实验揭示了反应过程中活性物种的等级顺序:⋅OH >⋅O2->H+,其中⋅OH 氧化对破坏包合物结构的能力最为明显。电子顺磁共振分析表明,联合使用超声波和臭氧产生的⋅OH 产率最高。动力学研究表明,钒浸出过程受界面化学反应的支配。经测定,在超声波-O3 条件下钒氧化浸出的活化能为 40.41 kJ/mol,与单独使用超声波条件相比降低了 20.19%。通过综合分析、表征和比较评估,可以发现超声波和臭氧处理的协同作用显著增强了低浓度 HF 对硅酸盐夹杂物的分解,尤其是将 SiOSi 键转化为 SiOH 键和 SiF 键。总之,结合臭氧催化和超声波处理的精炼浸出方法为难熔残钒的分离和提取提供了新思路。
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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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