{"title":"基于实时诱导磁振动的超滤膜防污机制","authors":"","doi":"10.1016/j.memsci.2024.123313","DOIUrl":null,"url":null,"abstract":"<div><div>Despite the widespread adoption of membrane technologies for efficient water treatment, membrane fouling remains a significant challenge, reducing separation efficiency, shortening lifespan, and increasing operational costs. Various studies have explored chemical membrane modifications to mitigate fouling, often resulting in adverse effects on flux and selectivity. Based on numerical modeling and experimental investigation, this work introduces real-time induced magnetic vibration as a sustainable approach for membrane antifouling without compromising permeability and selectivity. By preventing or delaying particle deposition on the membrane surface, magnetic vibration reduces fouling intensity. Experimental results demonstrated that different frequencies of magnetic vibration influenced the deposition of foulants (Humic Acid and Sodium Alginate) on the membrane surface. Notably, vibrating the membrane at 10 Hz with centrally attached iron particles led to a 22.4 % reduction in flux when treated with Humic Acid, compared to a 33.9 % reduction without vibration. Exposure to vibrations at the resonance frequency (5 Hz) for 6 h resulted in only a 10 % reduction in flux, effectively preventing the formation of a dense cake layer. Similarly, in the case of Sodium Alginate, a 10 Hz vibration for 2 h decreased the flux reduction from 21.4 % without vibration to 7.3 %, suggesting the preventive effect of vibration on aggregated SA deposition or facilitating continuous displacement for flux retention. Moreover, the study examined the influence of the configuration of iron particles attached to the membranes on the effectiveness of vibration. The study revealed that a striped configuration was more effective than a centralized configuration, owing to the distributed vibration effect across each part of the membrane. Furthermore, the fouling mechanism and rejection percentage were further investigated to enhance understanding of the fouling processes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":null,"pages":null},"PeriodicalIF":8.4000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Real-time induced magnetic vibrational based antifouling mechanism for ultrafiltration (UF) membrane\",\"authors\":\"\",\"doi\":\"10.1016/j.memsci.2024.123313\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Despite the widespread adoption of membrane technologies for efficient water treatment, membrane fouling remains a significant challenge, reducing separation efficiency, shortening lifespan, and increasing operational costs. Various studies have explored chemical membrane modifications to mitigate fouling, often resulting in adverse effects on flux and selectivity. Based on numerical modeling and experimental investigation, this work introduces real-time induced magnetic vibration as a sustainable approach for membrane antifouling without compromising permeability and selectivity. By preventing or delaying particle deposition on the membrane surface, magnetic vibration reduces fouling intensity. Experimental results demonstrated that different frequencies of magnetic vibration influenced the deposition of foulants (Humic Acid and Sodium Alginate) on the membrane surface. Notably, vibrating the membrane at 10 Hz with centrally attached iron particles led to a 22.4 % reduction in flux when treated with Humic Acid, compared to a 33.9 % reduction without vibration. Exposure to vibrations at the resonance frequency (5 Hz) for 6 h resulted in only a 10 % reduction in flux, effectively preventing the formation of a dense cake layer. Similarly, in the case of Sodium Alginate, a 10 Hz vibration for 2 h decreased the flux reduction from 21.4 % without vibration to 7.3 %, suggesting the preventive effect of vibration on aggregated SA deposition or facilitating continuous displacement for flux retention. Moreover, the study examined the influence of the configuration of iron particles attached to the membranes on the effectiveness of vibration. The study revealed that a striped configuration was more effective than a centralized configuration, owing to the distributed vibration effect across each part of the membrane. Furthermore, the fouling mechanism and rejection percentage were further investigated to enhance understanding of the fouling processes.</div></div>\",\"PeriodicalId\":368,\"journal\":{\"name\":\"Journal of Membrane Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.4000,\"publicationDate\":\"2024-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Membrane Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0376738824009074\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0376738824009074","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Real-time induced magnetic vibrational based antifouling mechanism for ultrafiltration (UF) membrane
Despite the widespread adoption of membrane technologies for efficient water treatment, membrane fouling remains a significant challenge, reducing separation efficiency, shortening lifespan, and increasing operational costs. Various studies have explored chemical membrane modifications to mitigate fouling, often resulting in adverse effects on flux and selectivity. Based on numerical modeling and experimental investigation, this work introduces real-time induced magnetic vibration as a sustainable approach for membrane antifouling without compromising permeability and selectivity. By preventing or delaying particle deposition on the membrane surface, magnetic vibration reduces fouling intensity. Experimental results demonstrated that different frequencies of magnetic vibration influenced the deposition of foulants (Humic Acid and Sodium Alginate) on the membrane surface. Notably, vibrating the membrane at 10 Hz with centrally attached iron particles led to a 22.4 % reduction in flux when treated with Humic Acid, compared to a 33.9 % reduction without vibration. Exposure to vibrations at the resonance frequency (5 Hz) for 6 h resulted in only a 10 % reduction in flux, effectively preventing the formation of a dense cake layer. Similarly, in the case of Sodium Alginate, a 10 Hz vibration for 2 h decreased the flux reduction from 21.4 % without vibration to 7.3 %, suggesting the preventive effect of vibration on aggregated SA deposition or facilitating continuous displacement for flux retention. Moreover, the study examined the influence of the configuration of iron particles attached to the membranes on the effectiveness of vibration. The study revealed that a striped configuration was more effective than a centralized configuration, owing to the distributed vibration effect across each part of the membrane. Furthermore, the fouling mechanism and rejection percentage were further investigated to enhance understanding of the fouling processes.
期刊介绍:
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.