Advancements in water purification: A defective MPN-based light-responsive self-cleaning membrane for superior bacteria and resistance gene removal, biofouling mitigation, and mechanistic insights

被引：0

作者：

Hou, Jun ^{[1
]}

Fan, Yue ^{[1
]}

Yang, Zijun ^{[1
]}

Wu, Jun ^{[1
]}

You, Guoxiang ^{[1
]}

Ao, Yanhui ^{[1
]}

Huang, Chaobo ^{[2
]}

Miao, Lingzhan ^{[1
]}

机构：

[1] Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resources Dev Shallow, Minist Educ, Nanjing 210098, Peoples R China

[2] Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210037, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 03期

关键词：

Metal-polyphenol networks; Self-cleaning membrane; Membrane biofouling; Antibiotic-free antibacterial agent; Resistance gene; REVERSE-OSMOSIS MEMBRANES;

D O I：

10.1016/j.jece.2024.113060

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To address the significant challenge of biofouling in ultrafiltration (UF) membranes, primarily caused by bacteria during water purification, we have developed an innovative light-responsive active self-cleaning membrane (TA@Fe-TiO2/PVDF). This membrane is produced by coating polyvinylidene fluoride (PVDF) with a metal-polyphenol-based complex (TA@Fe-TiO2 MPN). Compared to traditional photocatalytic membranes, such as TiO2/PVDF, the TA@Fe-TiO2/PVDF self-cleaning membrane demonstrates superior anti-biofouling and self-cleaning properties, achieving nearly complete flux recovery (similar to 100%) and bactericidal efficiency (close to 100%) in the treatment of municipal secondary effluent without the need for chemical additives. This effectiveness is attributed to the generation of hydroxyl radicals (<middle dot>OH) and singlet oxygen (O-1(2)) when the membrane is exposed to light, enhanced by the significant photothermal performance of TA@Fe. Notably, the TA@Fe-TiO2/PVDF membrane also excels in removing antibiotic resistance genes (ARGs), such as tetracycline and sulfadiazine, from wastewater. The removal of bacteria and ARGs is facilitated by a self-cleaning mechanism that combines partial mineralization and oxidation, as evidenced by increased hydrophilicity, active oxygen sites, and electron transfer. The membrane's efficient light-responsive excitation, self-cleaning capability, and stability herald new avenues for the sustainable application of membrane technology in water purification, characterized by reduced energy demands.

引用

页数：13