磁性生物炭对臭氧过氧化吸附-混凝法去除水中诺氟沙星的机理及影响

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.2024.106655

Xinhua Zhou, Lin Lu, Xilin Li, Fankang Meng, Ziqiang Ding, Zhihao Li, Bowen Chen, Jianxin Zhang

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引用次数: 0

摘要

诺氟沙星（NOR）是一种广泛使用的抗生素，其在水中的持续残留已成为严重的环境问题。硝态氮浓度高、持久性强，对生态环境和人类健康都构成威胁。因此，开发有效的水处理技术去除水中的NOR已成为一个关键问题。本研究开发了一种新型吸附剂，并将其与臭氧预氧化-吸附混凝工艺相结合，提高了浑浊水中硝态氮的去除效率。通过吸附实验考察了不同条件对NOR去除率的影响，并探讨了其潜在的去除机理。并对臭氧预氧化-机械搅拌-澄清池沉淀系统的工艺参数进行了优化。结果表明，当吸附剂投加量为1 g/L， pH = 7时，对硝态氮的去除率可达92.1%。主要吸附机制包括氢键、阳离子交换、静电吸引、插层、π-π相互作用和氧化。在吸附剂投加量为1 g/L、反应时间为60 min、PAC投加量为20 mg/L、臭氧流速为0.1 m3/h的条件下，对硝态氮和浊度的去除率分别为88.69%和81.55%。综上所述，臭氧预氧化与吸附-混凝技术相结合是处理高浓度抗生素废水的有效方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Mechanism and effect of magnetic biochar on the removal of norfloxacin from water by ozone peroxidation adsorption-coagulation process

查看原文本刊更多论文

Mechanism and effect of magnetic biochar on the removal of norfloxacin from water by ozone peroxidation adsorption-coagulation process

Norfloxacin (NOR) is a widely used antibiotic, and its persistent residues in water have become a significant environmental concern. Due to its high concentration and persistence, NOR poses a threat to both the ecological environment and human health. Therefore, the development of effective water treatment technologies for removing NOR from water has become a critical issue. This study developed a novel adsorbent and integrated it with an ozone pre-oxidation-adsorption coagulation process to enhance the removal efficiency of NOR from turbid water. Adsorption experiments were conducted to investigate the effects of various conditions on the removal efficiency of NOR and to explore the underlying removal mechanisms. Additionally, the process parameters in the ozone pre-oxidation-mechanical stirring-clarifier sedimentation system were optimized. The results indicate that when the adsorbent dosage is 1 g/L and the pH is 7, the removal efficiency of NOR reaches 92.1 %. The primary adsorption mechanisms involved include hydrogen bonding, cation exchange, electrostatic attraction, intercalation, π-π interactions, and oxidation. Additionally, under conditions of 1 g/L adsorbent dosage, a 60-min reaction time, 20 mg/L PAC dosage, and a 0.1 m³/h ozone flow rate, the removal efficiencies of NOR and turbidity were 88.69 % and 81.55 %, respectively. In conclusion, the combination of ozone pre-oxidation and adsorption-coagulation technology proves to be an effective method for treating high-concentration antibiotic wastewater.

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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