过硫酸锰活化自清洁薄膜聚酰胺二氧化锰纳米复合膜

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Ying Mei, Yushan Huang, Qirui Wang, Yujing Qiu, Yi Yang, Wei Shu, Yongqing Guo, Xiaofei Wang, Yuming Zheng, Xuehui Ge, Xiaocheng Lin
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引用次数: 0

摘要

纳滤(NF)的严重表面污垢阻碍了其在处理纺织业含染料废水中的实际应用。为了解决这一污垢问题,我们提出了一种新型薄膜纳米复合纳滤膜(TFNx),在聚酰胺(PA)排斥层中嵌入催化二氧化锰(MnO2)纳米颗粒,以实现原位芬顿式高级氧化自清洁。经验证,纳米二氧化锰颗粒的加入可适度降低 PA 层的交联度,从而获得更高的表面亲水性。MnO2 纳米粒子的加入增加了表面亲水性,从而提高了透水性(TFN10 18.1 ± 0.7 L m-2 h-1 bar-1),比对照薄膜纳米复合膜(TFC)高出 57.4%,同时保持了较高的染料抑制率。此外,在类芬顿反应中,催化能力强的 MnO2 纳米粒子的存在导致了膜的自清洁,并表现出更好的防污性能。过氧单硫酸盐(PMS)的加入引发了自由基的生成。此外,还全面研究了操作条件对膜自清洁性能和运行稳定性的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Self-Cleaning Thin Film Polyamide Manganese Dioxide Nanocomposite Membrane via Peroxymonosulfate Activation

Self-Cleaning Thin Film Polyamide Manganese Dioxide Nanocomposite Membrane via Peroxymonosulfate Activation
Severe surface fouling of nanofiltration (NF) has hindered its practical implementation in treating dye-containing wastewater from the textile industry. To address this fouling issue, a novel thin-film nanocomposite NF membrane (TFNx) was proposed by embedding catalytic manganese dioxide (MnO2) nanoparticles within polyamide (PA) rejection layer to realize in situ Fenton-like advanced oxidation self-cleaning. The incorporation of MnO2 nanoparticles was validated to moderately reduce the degree of cross-linking of the PA layer, thereby obtaining an enhanced surface hydrophilicity. The inclusion of MnO2 nanoparticles increased the surface hydrophilicity, resulting in a higher water permeance (TFN10 18.1 ± 0.7 L m–2 h–1 bar–1) that was 57.4% higher than that of the control thin film nanocomposite (TFC) membrane, while a high dye rejection was maintained. In addition, the presence of catalytically capable MnO2 nanoparticles in the Fenton-like reaction led to membrane self-cleaning and demonstrated a better antifouling behavior. The generation of free radicals was triggered by the addition of peroxymonosulfate (PMS). Furthermore, the impacts of operational conditions on membrane self-cleaning performance and operation stability were comprehensively investigated.
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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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