通过高碘酸盐激活的高锰酸钾电还原增强双酚A的降解

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-29 DOI:10.1016/j.jwpe.2024.106667

Xulong Zhang , Xiaoyan Liu , Shiwei Xie , Xian Liu

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引用次数: 0

摘要

本研究首次阐明了高锰酸盐（PM）对高碘酸盐（PI）的电化学活化在宽pH范围内增强双酚A （BPA）降解的功效。在电流密度为4 mA/cm2、200 μM PI和20 μM PM的条件下，该系统在30 min内对40 μM BPA的降解率达到99.8%，在120 min内对总有机碳（TOC）的去除率达到65.5%。该组合系统对BPA的降解协同系数为15.23，能效为0.14 KWh•m−3。优异的性能归功于PM在阴极还原为低价锰，这有利于PI的活化。此外，该系统在3-11的pH范围内保持了较高的双酚a降解效率。自由基猝灭和电子顺磁共振波谱实验证实了单重态氧在降解过程中的关键作用。此外，该体系对实际水基质成分（包括无机离子和腐植酸）相对不敏感。综上所述，该系统具有低能耗的特点，是一种生态友好的双酚a去除处理工艺。

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Enhanced degradation of bisphenol A through electroreduction of potassium permanganate activated by periodate

This study is first to elucidate the efficacy of electrochemical activation of periodate (PI) by permanganate (PM) in enhancing the degradation of bisphenol A (BPA) over a wide pH spectrum. Utilizing a current density of 4 mA/cm², 200 μM PI, and 20 μM PM, the proposed system achieved a 99.8 % degradation of 40 μM BPA within 30 min and a 65.5 % total organic carbon (TOC) removal in 120 min. The combined system yielded a synergistic coefficient of 15.23 for BPA degradation, and energy efficiency of 0.14 KWh•m⁻³. The exceptional performance is attributed to the reduction of PM to low-valent manganese species at the cathode, which facilitates the activation of PI. Additionally, the system preserved high BPA degradation efficiency across a pH range of 3–11. Radical quenching and electron paramagnetic resonance spectroscopy experiments confirmed the pivotal role of singlet oxygen in the degradation process. Furthermore, the system exhibited relative insensitivity to actual water matrix constituents, including inorganic ions and humic acid. In conclusion, the proposed system constitutes an eco-friendly treatment process for BPA removal characterized by low energy consumption.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies