利用单宁酸和聚乙烯醇夹层提高纳滤性能，改善透水性和选择性溶质截留性

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-11-05 DOI:10.1016/j.desal.2024.118277

Chaowen Liang , Qingwan Wang , Zhengwei Pan , Sanchuan Yu , Doufeng Wu , Congjie Gao

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引用次数: 0

摘要

全球水资源短缺大大加剧了对高效和可持续水净化技术的需求。纳滤（NF）在海水淡化中发挥着至关重要的作用，它能去除包括重金属和有机化合物在内的各种污染物，同时能耗极低，优势明显。传统的纳滤膜往往难以在高排斥率和令人满意的渗透性之间取得平衡。本研究利用聚砜作为耐久基材，并引入单宁酸（TA）-聚乙烯醇（PVA）中间膜来增强膜的结构坚固性和功能性，从而推动了无负压技术的发展。这种方法通过简化的一步涂布和精确的界面聚合，优化了单体哌嗪在基底上的储存和分散，有效控制了其扩散速度，从而使聚酰胺（PA）层更薄。这些战略性的改进不仅使渗透率显著提高到 216.3 L-m-2-h-1-MPa-1，对 Na2SO4 的阻隔率高达 99.04%，还确保了更高的长期运行稳定性。创新的 TA-PVA 中间膜为高性能无负压膜树立了新的标杆，将环境友好性与成本效益相结合，是大规模工业应用的理想选择。这种独特的成分促进了水处理技术的可持续性和经济效益，并凸显了扩大先进无负压系统的生产和应用的巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhancing nanofiltration performance with tannic acid and polyvinyl alcohol interlayers for improved water permeability and selective solute rejection

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Enhancing nanofiltration performance with tannic acid and polyvinyl alcohol interlayers for improved water permeability and selective solute rejection

Global water shortages have significantly intensified the demand for efficient and sustainable water purification technologies. Nanofiltration (NF) plays a crucial role in desalination, providing distinct advantages by removing a variety of pollutants including heavy metals and organic compounds, all while consuming minimal energy. Traditional NF membranes often struggle to balance high rejection with satisfactory permeability. This study advances NF technology by utilizing polysulfone as a durable substrate and introducing tannic acid (TA)-polyvinyl alcohol (PVA) interlayer to enhance structural robustness and functional capabilities of membranes. Through streamlined one-step coating followed by precise interfacial polymerization, this approach optimizes monomer piperazine storage and dispersion on substrate, effectively controlling its diffusion rate, resulting in a thinner polyamide (PA) layer. These strategic enhancements not only lead to a significant increase in permeability to 216.3 L·m⁻²·h⁻¹·MPa⁻¹ and an impressive rejection for Na₂SO₄ of 99.04 % but also ensure enhanced long-term operational stability. The innovative TA-PVA interlayer sets new benchmarks for high-performance NF membranes by combining environmental friendliness with cost-effectiveness, making it ideal for large-scale industrial applications. This unique composition promotes sustainability and economic efficiency in water treatment technologies, and underscoring the vast potential for expanding the production and application of advanced NF systems.

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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.