Drinking water purification using metal-organic frameworks: Removal of disinfection by-products

IF 19.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chem Pub Date : 2024-11-21 DOI:10.1016/j.chempr.2024.10.023

Gabriel Sanchez-Cano, Pablo Cristobal-Cueto, Lydia Saez, Antonio Lastra, Ana Marti-Calvo, Juan José Gutiérrez-Sevillano, Sofía Calero, Sara Rojas, Patricia Horcajada

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Abstract

Water disinfection is one of the most challenging processes for public health. Nevertheless, this process can generate inorganic by-products (chlorite [ClO₂⁻] and chlorate [ClO₃⁻]) associated with human diseases. Recently, the European Union established a permissible maximum concentration of 0.25 mg⋅L⁻¹ for both oxyanions in drinking water; thus, the existing technologies have to be adapted. Here, the earliest use of metal-organic frameworks (MOFs) in the elimination of the disinfection by-products ClO₂⁻ and ClO₃⁻ from fresh water is presented. Among the Fe-MOFs proposed, the robust MIL-88B-NH₂ demonstrated exceptional oxyanions elimination capacities (100% and 30% of ClO₂⁻ and ClO₃⁻ in 1 and 5 min, respectively). Based on these results, a continuous-flow device based on MIL-88B-NH₂ was tested under simulated realistic conditions, achieving high oxyanions elimination capacities, and the reusability of the system was demonstrated. This pioneering work opens new perspectives in the implementation of MOFs in real drinking water treatment plants (DWTPs).

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利用金属有机框架净化饮用水：去除消毒副产品

水消毒是对公共卫生最具挑战性的过程之一。然而，这一过程会产生与人类疾病相关的无机副产品（亚氯酸盐 [ClO2-] 和氯酸盐 [ClO3-]）。最近，欧盟规定这两种氧阴离子在饮用水中的最大允许浓度为 0.25 mg-L-1；因此，必须对现有技术进行调整。本文介绍了最早利用金属有机框架（MOFs）消除淡水中消毒副产物 ClO2- 和 ClO3-的方法。在提出的铁-MOFs 中，坚固耐用的 MIL-88B-NH2 显示出卓越的氧阴离子消除能力（1 分钟和 5 分钟内分别消除 100% 和 30% 的 ClO2- 和 ClO3-）。在这些结果的基础上，基于 MIL-88B-NH2 的连续流装置在模拟现实条件下进行了测试，实现了较高的氧阴离子消除能力，并证明了系统的可重复使用性。这项开创性工作为在实际饮用水处理厂（DWTP）中应用 MOFs 开辟了新的前景。

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来源期刊

Chem Environmental Science-Environmental Chemistry

CiteScore

32.40

自引率

1.30%

发文量

281

期刊介绍： Chem, affiliated with Cell as its sister journal, serves as a platform for groundbreaking research and illustrates how fundamental inquiries in chemistry and its related fields can contribute to addressing future global challenges. It was established in 2016, and is currently edited by Robert Eagling.