How Do Chemical Cleaning Agents Act on Polyamide Nanofiltration Membrane and Fouling Layer?,Industrial & Engineering Chemistry Research

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How Do Chemical Cleaning Agents Act on Polyamide Nanofiltration Membrane and Fouling Layer?
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-02 , DOI: 10.1021/acs.iecr.0c03365
Jiachen Huang _{1,

2} , Jianquan Luo _{1,

2} , Xiangrong Chen _{1,

2} , Shichao Feng _{1,

2} , Yinhua Wan _{1,

2}

Affiliation

Nanofiltration (NF) membranes, especially polyamide (PA) ones, are widely applied in water treatment, food processing, and resource recovery thanks to their excellent separation selectivity to small solutes and high water permeability. However, membrane fouling is inevitable during the long-term operation and limits the large-scale applications of NF technology. Chemical cleaning is considered the most effective way to avoid fouling aggravation and quickly restore membrane permeability on site. However, frequent chemical cleaning would cause reversible/irreversible changes in the physical and chemical properties of NF membranes, resulting in membrane damage and deterioration of separation performance. Moreover, the PA NF membrane with high selectivity and a relatively low cross-linking degree is more sensitive to chemical cleaning. Many efforts, therefore, have been dedicated to clarifying the effect of chemical cleaning on the NF membrane properties and its separation performance. This review summarizes recent developments in the field and epitomizes the synergistic/inhibitory effect among the chemical cleaning agents on the fouling removal. Besides the practical guides for chemical cleaning of the PA NF membrane, many opportunities to advance the field are also pointed out.

中文翻译：

化学清洗剂如何作用于聚酰胺纳滤膜和污垢层？

纳滤（NF）膜，尤其是聚酰胺（PA）膜由于其对小溶质的优异分离选择性和高水渗透性而广泛应用于水处理，食品加工和资源回收。但是，膜的结垢在长期运行中是不可避免的，并限制了NF技术的大规模应用。化学清洁被认为是避免结垢加剧并在现场快速恢复膜渗透性的最有效方法。但是，频繁的化学清洁会导致NF膜的物理和化学性质发生可逆/不可逆变化，从而导致膜损坏和分离性能下降。此外，具有高选择性和较低交联度的PA NF膜对化学清洗更敏感。很多努力因此，致力于澄清化学清洗对NF膜性能及其分离性能的影响。这篇综述总结了该领域的最新进展，并概括了化学清洁剂对结垢去除的协同/抑制作用。除了有关化学清洗PA NF膜的实用指南外，还指出了推动该领域发展的许多机会。

更新日期：2020-10-07

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