Removal of sulfamethoxazole by Fe(III)-activated peracetic acid combined with ascorbic acid.

IF 2.2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI:10.1080/09593330.2024.2442779
Yiqing Liu, Linghan Xu, Xin Li, Shixiang Wang
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引用次数: 0

Abstract

Ascorbic acid (AA) was used as a reducing agent to improve the Fe(III)-activated peracetic acid (PAA) system for the removal of sulfamethoxazole (SMX) in this work. The efficiency, influencing factors and mechanism of SMX elimination in the AA/Fe(III)/PAA process were studied. The results exhibited that AA facilitated the reduction of Fe(III) to Fe(II) and subsequently improved the activation of PAA and H2O2. Various radicals, including organic radicals (e.g. CH3C(O)O• and CH3C(O)OO•) and hydroxyl radical (HO•), were rapidly formed from the activated PAA and H2O2, resulting in SMX removal. Increasing dosages of PAA and Fe(III) contributed to enhanced SMX degradation, while excessive PAA and Fe(III) did not further promote SMX degradation. Due to the radicals' quenching effect, excess AA hindered SMX elimination in the AA/Fe(III)/PAA process. The presence of HCO3- and Cl- inhibited SMX removal in this system, whereas NO3-, SO42- and natural organic matter had little impact on SMX degradation. The transformation pathways of SMX in the AA/Fe(III)/PAA system included hydroxylation, bond cleavage and amino oxidation. This research provides a strategy to enhance the Fe(III)-activated PAA system for the elimination of refractory organic pollutants.

铁(III)活化过氧乙酸与抗坏血酸联合去除磺胺甲恶唑。
以抗坏血酸(AA)为还原剂,改进了Fe(III)活化过氧乙酸(PAA)体系对磺胺甲恶唑(SMX)的去除效果。研究了AA/Fe(III)/PAA工艺中SMX的去除效率、影响因素及机理。结果表明,AA促进了Fe(III)还原为Fe(II),进而提高了PAA和H2O2的活化。活化的PAA和H2O2迅速形成各种自由基,包括有机自由基(如CH3C(O)O•和CH3C(O)OO•)和羟基自由基(HO•),从而去除SMX。增加PAA和Fe(III)的剂量有助于SMX的降解,而过量的PAA和Fe(III)没有进一步促进SMX的降解。由于自由基的猝灭作用,过量的AA阻碍了AA/Fe(III)/PAA过程中SMX的消除。HCO3-和Cl-的存在抑制了SMX的去除,而NO3-、SO42-和天然有机物对SMX的降解影响不大。SMX在AA/Fe(III)/PAA体系中的转化途径包括羟基化、键裂解和氨基氧化。本研究为增强Fe(III)活化PAA体系去除难降解有机污染物提供了一种策略。
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来源期刊
Environmental Technology
Environmental Technology 环境科学-环境科学
CiteScore
6.50
自引率
3.60%
发文量
0
审稿时长
4 months
期刊介绍: Environmental Technology is a leading journal for the rapid publication of science and technology papers on a wide range of topics in applied environmental studies, from environmental engineering to environmental biotechnology, the circular economy, municipal and industrial wastewater management, drinking-water treatment, air- and water-pollution control, solid-waste management, industrial hygiene and associated technologies. Environmental Technology is intended to provide rapid publication of new developments in environmental technology. The journal has an international readership with a broad scientific base. Contributions will be accepted from scientists and engineers in industry, government and universities. Accepted manuscripts are generally published within four months. Please note that Environmental Technology does not publish any review papers unless for a specified special issue which is decided by the Editor. Please do submit your review papers to our sister journal Environmental Technology Reviews at http://www.tandfonline.com/toc/tetr20/current
文献相关原料
公司名称
产品信息
阿拉丁
sulfamethoxazole
阿拉丁
Ascorbic acid
阿拉丁
methyl phenyl sulfoxide (PMSO)
阿拉丁
methyl phenyl sulfone (PMSO2)
阿拉丁
N,N-diethyl-p-phenylenediamine sulfate
阿拉丁
rhodamine B (RhB)
阿拉丁
methylene blue (MB)
阿拉丁
tetracycline (TC)
阿拉丁
oxytetracycline (OTC)
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