通过氧化锌纳米颗粒改性和相间聚合提高咸水反渗透膜的通量性能

IF 3.3 4区 工程技术 Q2 CHEMISTRY, PHYSICAL Membranes Pub Date : 2024-09-27 DOI:10.3390/membranes14100207
Jesús Álvarez-Sánchez, Germán Eduardo Dévora-Isiordia, Claudia Muro, Yedidia Villegas-Peralta, Reyna Guadalupe Sánchez-Duarte, Patricia Guadalupe Torres-Valenzuela, Sergio Pérez-Sicairos
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引用次数: 0

摘要

随着时间的推移,世界上的缺水问题日益严重,河流、湖泊和水坝日渐干涸。反渗透技术是一种非常可行的替代技术,有助于减少水资源短缺。所面临的挑战之一是如何提高工艺的效率,而这可以通过使用纳米材料来提高膜的处理能力来实现,从而在不超出工艺限制的情况下提高渗透通量。在这项研究中,采用相间聚合法对苦咸水膜(BW30)进行了氧化锌纳米颗粒改性。傅立叶变换红外光谱、原子力显微镜、接触角和千分尺对改性膜和 BW30(未改性)进行了表征。在使用 9000 ppm 苦咸水的横流装置中对膜进行了测试,并测定了它们的渗透通量、盐排斥率和浓度极化。在 20 赫兹和 30 赫兹频率下,10 毫克 ZnO NP 膜的盐排斥率分别为 97.13% 和 97.77%,足以生成饮用水。在 6.24 兆帕和 30 赫兹条件下,与 BW30 膜 122.63 L m-2 h-1 的渗透通量相比,它获得了 12.2% 的最佳渗透通量,而且浓度极化有所增加。
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Improved Flux Performance in Brackish Water Reverse Osmosis Membranes by Modification with ZnO Nanoparticles and Interphase Polymerization.

With each passing year, water scarcity in the world is increasing, drying up rivers, lakes, and dams. Reverse osmosis technology is a very viable alternative which helps to reduce water shortages. One of the challenges is to make the process more efficient, and this can be achieved by improving the capacity by adapting membranes with nanomaterials in order to increase the permeate flux without exceeding the limits established in the process. In this research, brackish water membranes (BW30) were modified with ZnO nanoparticles by interphase polymerization. The modified membranes and BW30 (unmodified) were characterized by FTIR, AFM, contact angle, and micrometer. The membranes were tested in a cross-flow apparatus using 9000 ppm brackish water, and their permeate flux, salt rejection, and concentration polarization were determined. The salt rejection for the 10 mg ZnO NP membrane was 97.13 and 97.77% at 20 and 30 Hz, respectively, sufficient to generate drinking water. It obtained the best permeate flux of 12.2% compared to the BW30 membrane with 122.63 L m-2 h-1 at 6.24 MPa and 30 Hz, under these conditions, and the concentration polarization increased.

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来源期刊
Membranes
Membranes Chemical Engineering-Filtration and Separation
CiteScore
6.10
自引率
16.70%
发文量
1071
审稿时长
11 weeks
期刊介绍: Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
期刊最新文献
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