Degradation of tetracycline hydrochloride by combined electro-Fenton/zero valent iron/peroxymonosulfate system and coagulation technology

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-25 DOI:10.1016/j.jwpe.2024.106637

Pengyu Zhang, Yonggang Zhang

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引用次数: 0

Abstract

In this study, zero-valent iron (ZVI) is utilized as the source of Fe²⁺ in the electro-Fenton (EF) reaction and as an activator for peroxomonosulfate (PMS) to construct the EF/ZVI/PMS system, which is combined with coagulation technology to enhance the degradation efficiency of organic pollutants, COD, and TOC, thereby reducing the overall reaction time. In the laboratory experiments, tetracycline hydrochloride (TC-HCl) serves as a model for simulated wastewater. The optimization of voltage, ZVI dosage, PMS dosage, electrochemical reaction time, coagulant dosage, and pH levels in the system are optimized through one-way and orthogonal experiments. Employing X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), scanning electron microscopy (SEM), zeta potential measurements, Fourier transform infrared spectroscopy (FTIR), and liquid chromatography-mass spectrometry (LC-MS), the synergistic mechanism and degradation pathway of oxidation, coagulation, and adsorption in the combined treatment of ZVI/EF/PMS system and coagulation technology are analyzed. The results show that after EF/ZVI/PMS oxidation treatment, the coagulation performance of wastewater is enhanced, and the subsequent addition of coagulation agents further improves the degradation effect of pollutants through compression of the electric double layer and adsorption and electroneutralization. In addition, the wide applicability of the system to pollutants of different concentrations and types has been verified. The coupling of EF/ZVI/PMS system and coagulation technology overcomes the limitations of low mineralization rates and long treatment times associated with electrochemical oxidation, as well as the inadequate treatment effects of coagulation alone, and provides offering a novel approach for the development of cost-effective and green multi-technology coupling.

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利用电-芬顿/零价铁/过硫酸盐组合系统和混凝技术降解盐酸四环素

本研究利用零价铁（ZVI）作为电-芬顿（EF）反应中的 Fe2+ 源和过硫酸单胞菌（PMS）的活化剂，构建了 EF/ZVI/PMS 系统，并将其与混凝技术相结合，以提高有机污染物、COD 和 TOC 的降解效率，从而缩短整体反应时间。在实验室实验中，以盐酸四环素（TC-HCl）作为模拟废水模型。通过单向和正交实验，对系统中的电压、ZVI 用量、PMS 用量、电化学反应时间、混凝剂用量和 pH 值进行了优化。利用 X 射线光电子能谱（XPS）、电子自旋共振（ESR）、扫描电子显微镜（SEM）、zeta 电位测量、傅立叶变换红外光谱（FTIR）和液相色谱-质谱联用技术（LC-MS），分析了 ZVI/EF/PMS 系统与混凝技术联合处理过程中氧化、混凝和吸附的协同机理和降解途径。结果表明，经过 EF/ZVI/PMS 氧化处理后，废水的混凝性能得到增强，随后投加的混凝剂通过压缩电双层、吸附电中和等作用进一步提高了污染物的降解效果。此外，该系统对不同浓度和类型污染物的广泛适用性也得到了验证。EF/ZVI/PMS 系统与混凝技术的耦合克服了电化学氧化矿化率低、处理时间长以及单独混凝处理效果不佳的局限性，为开发具有成本效益的绿色多技术耦合提供了一种新方法。

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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