利用废旧锂离子电池回收的钴,通过H₂O₂/HCO₃⁻/Co2⁺体系降解亚甲基蓝

IF 2.6 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2025-06-12 DOI:10.1007/s11581-025-06471-2
Eric M. Garcia, Hosane A. Taroco, Júlio O. F. Melo, Patrícia A. Rocha, Roseli M. Balestra, Cristiane G. Taroco, Honória F. Gorgulho
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引用次数: 0

摘要

合成染料和电子废物造成的日益加重的环境负担需要创新的、可持续的解决方案。在这项工作中,我们提出了一种绿色高效的高级氧化工艺(AOP),利用废旧锂离子电池(LIB)阴极回收的钴离子催化降解亚甲基蓝(MB),这是一种典型的有机污染物。Co2⁺/HCO₃⁻/H₂O₂体系在温和的条件下(pH ~ 8.35), 10 ppm的MB溶液在10分钟内完全脱色,动力学分析显示MB中的伪零阶行为和半阶依赖于Co2⁺、HCO₃⁻和H₂O₂。UV-Vis光谱证实了[Co(Co₃)₃]3⁻复合物的形成,而电喷雾电离质谱(ESI-MS)显示了去甲基化的中间物和更小的片段,表明了逐渐的矿化。机理上的见解表明碳酸盐自由基(•CO₃⁻)的主要形成,正如异丙醇清除实验所支持的那样。这项研究强调了钴回收和废水处理的双重环境效益,为电子废物的增值和减轻纺织染料污染提供了一条可持续的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Degradation of methylene blue via H₂O₂/HCO₃⁻/Co2⁺ system using cobalt recovered from spent Li-ion batteries

The increasing environmental burden posed by synthetic dyes and electronic waste demands innovative, sustainable solutions. In this work, we present a green and efficient advanced oxidation process (AOP) employing cobalt ions recovered from spent Li-ion battery (LIB) cathodes to catalyze the degradation of methylene blue (MB), a model organic pollutant. The Co2⁺/HCO₃⁻/H₂O₂ system enabled complete decolorization of a 10 ppm MB solution within 10 min under mild conditions (pH ~ 8.35), with kinetic analysis revealing pseudo-zero-order behavior in MB and half-order dependence on Co2⁺, HCO₃⁻, and H₂O₂. UV–Vis spectroscopy confirmed the formation of the [Co(CO₃)₃]3⁻ complex, while electrospray ionization mass spectrometry (ESI–MS) revealed demethylated intermediates and smaller fragments, suggesting progressive mineralization. Mechanistic insights indicate the predominant formation of carbonate radicals (•CO₃⁻), as supported by isopropanol scavenging experiments. This study highlights the dual environmental benefit of cobalt recovery and wastewater treatment, offering a sustainable pathway for the valorization of electronic waste and the mitigation of textile dye pollution.

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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