Biogenic silver nanoparticles (bio-Ag0) decrease biofouling of bio-Ag0/PES nanocomposite membranes
- 作者：Manying ZhangKaisong ZhangBart De GussemeWilly Verstraete
- 会议时间：2013-10-01
- 关键词：biogenic silver ; nanocomposite membrane ; flux ; hydrophilicity ; silver loss ; antibiofouling
- 作者单位：Manying Zhang,Kaisong Zhang(Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China)Bart De Gusseme,Willy Verstraete(Laboratory of Microbial Ecology and Technology (LabMET),Ghent University,Coupure Links 653,B-9000 Ghent,Belgium)
- 母体文献：第十一届全国博士生学术年会专题——节能环保与污染防治技术分会场论坛论文集
- 会议名称：第十一届全国博士生学术年会专题——节能环保与污染防治技术分会场论坛
- 会议地点：成都
- 主办单位：中国环境科学学会
- 语种：chi
摘要
Biofouling is a major problem for the application of membrane technology in water and wastewater treatment.Advanced anti-biofouling membrane material is one of the practical strategies to reduce biofouling.The nanocomposite Polyethersulfone [1] membranes were modified with different amounts of biogenic silver nanoparticles (bio-Ago) by the phase mversion method.The effects of bio-Ago content on the membrane structure and filtration performance were systematically investigated.The results demonstrated that silver-containing nanostructures were uniformly distributed on membrane surface.Bio-Ago incorporation slightly increased the hydrophilicity of the PES membrane and increased the permeate flux.The anti-bacterial and anti-biofouling performance of the bio-Ag0/PES nanocomposites membrane were tested with pure cultures (Escherichia coli and Pseudomonas aeruginosa) and a mixed culture (an activated sludge bioreactor) respectively.The bio-Ag0/PES composite membranes,even with the lowest content of biogenic silver (140 mg bio-Ago m-2),not only exhibited excellent anti-bacterial activity,but also prevented bacterial attachment to the membrane surface and decreased the biofilm formation during a 9 weeks test.