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Preparation and antibacterial properties of nano-iron sulfide modified nanofiltration membrane

Authors： WANG Ze, WEI Xiuzhen*, HUANG Jiahao, SHAO Fangyuan, LI Huan, CHEN Jinyuan

Units： College of the Environment，Zhejiang University of Technology，Hangzhou 310000，China

KeyWords： nFeS; interfacial polymerization; Nanofiltration membrane; Antibacterial; Modification;

ClassificationCode：TQ051.893；TQ455.19

year,volume(issue):pagination： 2022,42(4):65-72

Abstract：

To improve the antimicrobial performance of nanofiltration (NF) membranes, nano iron sulfide (nFeS) with antibacterial ability was synthesized by the improved solvothermal method using ferric chloride and diallyl disulfide (DADS) as the raw materials. nFeS modified polyamide NF membrane was prepared by interfacial polymerization process with polysulfone ultrafiltration membrane as porous support membrane and nFeS as modify agent added to aqueous piperazine aqueous solution. Series characterization indicated that nFeS was successfully synthesized and embedded into the polyamide NF membrane selection layer. The permeation flux of nFeS modified polyamide NF membrane was 65.7 L /（m2h） at 0.4 MPa, and the rejection rate for 1000 mg/L Na2SO4 was 94.8%. With the increase of nFeS concentration, the antibacterial properties of nFeS modified NF membrane were gradually enhanced. For the nFeS modified NF membrane prepared in this study, it showed relatively good permeation and separation properties, and the inhibition rate of modified NF membrane against Gram-positive bacteria achieved 57% and the inhibition rate against Gram-negative bacteria reached 41% of. At the same time, nFeS modified NF membrane also shows good antifouling properties.

Funds：

浙江省自然科学基金项目(LY19E030005)；

AuthorIntro：

王泽（1996-），男，河南濮阳人，硕士研究生，研究方向为膜法水处理

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