Sacrificial membranes in water purification: Concepts, current status, and outlook

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-01-22 DOI:10.1016/j.seppur.2025.131748

Kelly M. Conway, Baoxia Mi

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引用次数: 0

Abstract

Sacrificial membranes typically contain a regenerable surface layer that is designed to address one or more of the critical limitations of membrane separation, such as fouling, low chlorine resistance, and poor selectivity towards certain contaminants. By enabling in-situ removal of fouled, damaged, or spent surface layers, regeneration of the sacrificial membrane can be achieved by depositing a fresh surface layer on the base membrane. In this review, we first review the materials that are currently being studied and evaluated for sacrificial membrane applications and identify new promising materials. Then, we discuss the application of sacrificial membranes to control fouling, increase chlorine resistance, and improve targeted contaminant removal. In particular, we discuss the promise of sacrificial multi-functional membranes that utilize functional materials to remove contaminants by adsorption or reaction simultaneously during filtration. Finally, we conclude with a discussion of regeneration strategies for sacrificial membranes and an outlook on opportunities and challenges in the field. The most promising regeneration strategies for removing spent layers and redepositing new ones are the in-situ procedures that align with the routine cleaning protocols widely adopted by the membrane industry.

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水净化中的牺牲膜：概念、现状与展望

牺牲膜通常含有可再生的表面层，旨在解决膜分离的一个或多个关键限制，例如污染，低氯抗性和对某些污染物的选择性差。通过原位去除污染、损坏或消耗的表面层，牺牲膜的再生可以通过在基膜上沉积新的表面层来实现。在这篇综述中，我们首先回顾了目前正在研究和评价的牺牲膜材料，并确定了新的有前景的材料。然后，我们讨论了牺牲膜在控制污染、提高抗氯性和改善靶向污染物去除方面的应用。我们特别讨论了牺牲多功能膜的前景，这种膜利用功能材料在过滤过程中通过吸附或反应同时去除污染物。最后，我们对牺牲膜的再生策略进行了讨论，并展望了该领域的机遇和挑战。去除废层和重新沉积新层的最有前途的再生策略是原位程序，与膜工业广泛采用的常规清洁协议一致。

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

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.