Investigation on the rejection of mixed salt solution by g-C3N4 functionalized nanofiltration membrane

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-10-19 DOI:10.1016/j.desal.2024.118226

Zihan Xu , Zhaohuan Mai , Yanhui Wu , Xinwu Li , Xinyu Zeng , Chunchun Meng , Guangming Li , Haochen Zhu

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引用次数: 0

Abstract

The use of nanofiltration membrane technologies for seawater desalination is one of the effective ways to solve the shortage of water resources. However, traditional commercial membrane cannot maintain the excellent rejection for a variety of salt ions in mixed salt solutions, while ensuring the excellent permeance flux. In this study, g-C₃N₄ functionalized nanofiltration membranes of special charge distribution on the surface were prepared by interfacial polymerization to investigate the rejection performance of mixed salt solution (Na₂SO₄/NaCl, CaCl₂/NaCl). Compared with the traditional commercial nanofiltration membrane, the polyamide nanofiltration membrane intercalated with g-C₃N₄ has excellent rejection performance of a permeance flux of 50.76 L

∙

m⁻² h⁻¹ and 50% retention improvement for both monovalent and divalent ions. In addition, the composite membrane has a good anti-fouling performance in both bovine serum albumin and humic acid solutions.

Abstract Image

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关于 g-C3N4 功能化纳滤膜排斥混合盐溶液的研究

利用纳滤膜技术进行海水淡化是解决水资源短缺的有效途径之一。然而，传统的商用膜无法在保证优异渗透通量的同时，对混合盐溶液中的多种盐离子保持优异的截留性能。本研究采用界面聚合法制备了表面特殊电荷分布的 g-C3N4 功能化纳滤膜，以考察其对混合盐溶液（Na2SO4/NaCl、CaCl2/NaCl）的截留性能。与传统的商用纳滤膜相比，夹杂了 g-C3N4 的聚酰胺纳滤膜具有优异的截留性能，其渗透通量为 50.76 L∙m-2 h-1，对一价和二价离子的截留率均提高了 50%。此外，该复合膜在牛血清白蛋白和腐植酸溶液中都具有良好的防污性能。

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.