title: Powder Activated Carbon Pretreatment of a Microfiltration Membrane for the Treatment of Surface Water.
abstract: This study focused on the effect of powder activated carbon (PAC) adsorption on microfiltration (MF) membrane performance. The results showed that PAC pretreatment offered high organic matter removal rates for both dissolved organic carbon (DOC) and ultraviolet absorbance at 254 nm (UV254) during 10-200 mg/L PAC dosage. The removal efficiencies of organic matter by MF membrane filtration decreased with the increase of organic matter removal rate by PAC adsorption. PAC mainly removed organic matter of about 3 kDa molecular weight (MW). MF membrane maintained more than 5 kDa MW organic matter on the membrane after PAC adsorption. The results of membrane filtration indicated that PAC pretreatment slightly promoted membrane flux, regardless of PAC dosage. It seems that the organic matter fouling membrane was concentrated in more than 3 kDa MW. PAC removed markedly less than 3 kDa MW organic matter and had less effect on more than 3 kDa organic matter. Thus, PAC cannot reduce membrane fouling.
authors.affiliation: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China. yali_song@sina.com.
authors.forename: Yali
authors.initials: Y
authors.lastname: Song
authors.affiliation: College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. dbz77@tongji.edu.cn.
authors.forename: Bingzhi
authors.initials: B
authors.lastname: Dong
authors.affiliation: College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. gaonaiyun@sina.com.
authors.forename: Naiyun
authors.initials: N
authors.lastname: Gao
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310032, China. mayaner620@163.com.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Ma
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000378:metabolism*; D005374:Filtration / Q000379:methods*; D008567:Membranes, Artificial; D008970:Molecular Weight; D014867:Water; D018508:Water Purification / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D014867:Water; D002606:Charcoal
keywords: PAC; membrane flux; microfiltration; organic matter; surface water