Bromate Removal from Water Using Ion Exchange Resin: Batch and Fixed Bed Column Performance

IF 2.1 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Ozone: Science & Engineering Pub Date : 2022-08-29 DOI:10.1080/01919512.2022.2114420

Safal Mestri, Sedar Dogan, C. Tizaoui

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引用次数: 1

Abstract

ABSTRACT In this study, the removal of bromate, a regulated ozone by-product, was evaluated using a strong-base anion (SBA) exchange resin in batch and column experiments. The kinetics studies in batch mode showed that film diffusion-controlled bromate exchange in SBA and the isotherm studies showed that the Langmuir model fitted the experimental results with a maximum exchange capacity of 296.66 mg BrO3 −/g (~1.3 meq/mL resin). In the fixed-bed column studies, breakthrough curves were obtained under different operating conditions to examine the effects of feed flow rate, inlet bromate concentration, and bed height on column performance. A modified n-order Bohart and Adams model (n-BAM-c), which considered the asymmetry of the breakthrough curve and flow channeling, was applied for the first time to describe the experimental data obtained from the column and to predict the breakthrough curves. It was found that n-BAM-c fitted the experimental data well (R2 > 0.99) and the effects of the key operating conditions on the model parameters were determined. Overall, the results show that SBA exchange is suitable for bromate removal from water and n-BAM-c could be a powerful tool for the design and upscaling of bromate ion exchange columns.

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离子交换树脂去除水中溴酸盐:间歇和固定床柱性能

在本研究中，研究了强碱阴离子(SBA)交换树脂对调控臭氧副产物溴酸盐的去除效果。批处理模式下的动力学研究表明，SBA中的溴酸盐交换具有薄膜扩散控制，等温线研究表明，Langmuir模型与实验结果吻合，最大交换容量为296.66 mg BrO3−/g (~1.3 meq/mL树脂)。在固定床塔研究中，通过不同操作条件下的突破曲线，考察进料流量、进口溴酸盐浓度和床层高度对塔性能的影响。首次采用考虑突破曲线不对称性和窜流的改进n阶Bohart and Adams模型(n-BAM-c)对实验数据进行描述，并对突破曲线进行预测。结果表明，n- bamc与实验数据拟合良好(R2 > 0.99)，确定了关键操作条件对模型参数的影响。综上所述，SBA交换体适合于去除水中的溴酸盐，n-BAM-c可以作为设计和升级溴酸盐离子交换柱的有力工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ozone: Science & Engineering 环境科学-工程：环境

CiteScore

5.90

自引率

11.10%

发文量

审稿时长

2 months

期刊介绍： The only journal in the world that focuses on the technologies of ozone and related oxidation technologies, Ozone: Science and Engineering brings you quality original research, review papers, research notes, and case histories in each issue. Get the most up-to date results of basic, applied, and engineered research including: -Ozone generation and contacting- Treatment of drinking water- Analysis of ozone in gases and liquids- Treatment of wastewater and hazardous waste- Advanced oxidation processes- Treatment of emerging contaminants- Agri-Food applications- Process control of ozone systems- New applications for ozone (e.g. laundry applications, semiconductor applications)- Chemical synthesis. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees.