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通过构建涂覆PFSA离聚物的纳滤膜组件在不拆解纳滤膜组件的情况下提高硝酸盐氮去除率的研究

A Study to Enhance the Nitrate-Nitrogen Removal Rate without Dismantling the NF Module by Building a PFSA Ionomer-Coated NF Module.

作者信息

Park In-Kee, Hou Jian, Yun Jaehan, Lee Hee-Dae, Lee Chang-Hyun

机构信息

Department of Energy Engineering, Dankook University, Cheonan 31116, Korea.

Coway R & D Center, Seoul 08826, Korea.

出版信息

Membranes (Basel). 2021 Oct 9;11(10):769. doi: 10.3390/membranes11100769.

DOI:10.3390/membranes11100769
PMID:34677535
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8539951/
Abstract

Water resource pollution by nitrate-nitrogen, mainly caused by anthropogenic causes, induces eutrophication of water resources, and indicates the degree of organic pollution. Therefore, this study devised a method for coating PFSA ionomer with excellent chemical resistance without disassembling the module to improve the removal rate of nitrate-nitrogen in water by using a cyclic coating method on a commercially available nanofiltration membrane (NF membrane) module. Nafion was prepared as a supercritical fluid dispersion using a high-temperature and high-pressure reactor, and the particle size and the degree of dispersion of the dispersion were analyzed by DLS. The crystallinity was confirmed through XRD by drying the dispersion in the liquid state. After the dispersion was prepared as a membrane according to the heat treatment conditions, the characteristics according to the particle size were analyzed by tensile strength and TEM. The nitrate-nitrogen removal rate of the NF membrane module coated with the dispersion was increased by 93% compared to that before coating. Therefore, the result showed that the cycle coating method devised in this study could efficiently coat the already commercialized module and improve performance.

摘要

硝酸盐氮对水资源的污染主要由人为因素造成，会导致水资源富营养化，并反映有机污染程度。因此，本研究设计了一种在不拆解模块的情况下对具有优异耐化学性的PFSA离聚物进行涂覆的方法，通过在市售纳滤膜（NF膜）模块上采用循环涂覆法来提高水中硝酸盐氮的去除率。使用高温高压反应器将Nafion制备成超临界流体分散体，并通过动态光散射（DLS）分析分散体的粒径和分散程度。通过对液态分散体进行干燥，利用X射线衍射（XRD）确认结晶度。根据热处理条件将分散体制备成膜后，通过拉伸强度和透射电子显微镜（TEM）分析粒径相关特性。与涂覆前相比，涂覆该分散体的NF膜模块对硝酸盐氮的去除率提高了93%。因此，结果表明本研究设计的循环涂覆法能够有效地对已商业化的模块进行涂覆并提高性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/08a20190fe6a/membranes-11-00769-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/8c337d6a8c87/membranes-11-00769-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/c8fd653bad93/membranes-11-00769-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/cf7e497b9c5d/membranes-11-00769-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/011887285d89/membranes-11-00769-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/7bc5b33d9690/membranes-11-00769-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/b6782134dc8b/membranes-11-00769-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/fc8f205b36b9/membranes-11-00769-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/faa85b888319/membranes-11-00769-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/d823042680ce/membranes-11-00769-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/08a20190fe6a/membranes-11-00769-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/8c337d6a8c87/membranes-11-00769-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/c8fd653bad93/membranes-11-00769-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/cf7e497b9c5d/membranes-11-00769-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/011887285d89/membranes-11-00769-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/7bc5b33d9690/membranes-11-00769-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/b6782134dc8b/membranes-11-00769-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/fc8f205b36b9/membranes-11-00769-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/faa85b888319/membranes-11-00769-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/d823042680ce/membranes-11-00769-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0a84/8539951/08a20190fe6a/membranes-11-00769-g010.jpg

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