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6959704 
Journal Article 
INFLUENCES OF SURFACTANTS FOULING ON THE REMOVAL OF PHTHALATES BY NANOFILTRATION MEMBRANE 
Zhu, L; Shen, L; Li, H 
2015 
0 
Shui Chu Li Ji Shu: Technology of Water Treatment
ISSN: 1000-3770 
41 
5 
34-38 
Chinese 
Two nanofiltration membranes (NF90 and NF270) and typical surfactants (nonionic Tween80, anionic SDBS and cationic CTMAB) were selected to investigate the influence of surfactant fouling on the modification of membrane properties and thereby on the rejection of three phthalic acid esters including dimethyl phthalate (DMP), diethyl phthalate (DEP) and dibutyl phthalate (DBP). The results showed that the permeate flux of NF90 membrane decreased significantly to 21%~59% and the hydrophilicity of the membrane increased obviously after being fouled by all the three surfactants. For NF270, a significantly decrease of permeate flux and an increase of hydrophobicity were observed only after being fouled by CTMAB. With regard to the NF90 membrane, the rejections of three phthalic acid esters were not observed to be distinctly affected by the fouling. However, rejections of DMP, DEP and DBP by NF270 fouling with CTMAB decreased by 5.6%, 15.2% and 24.1%, respectively. This may be attributed to the solubilization of CTMAB on organic pollutant. The accrued solutes at the membrane surface enhanced the concentration gradient across the membrane leading to an increase in permeate concentration and thereby a decrease in rejection. The addition of NaCl in the feed stream decreased the permeate flux of both fouled nanofiltration membranes, and the permeate flux decreased significantly with increased NaCl concentration (from 10 to 20 mmol/L). Increase the NaCl concentration from 10 to 20 mmol/L lead to increase or decrease of rejection after membrane fouling, which result could be ascrib to the hydrophobicity of organic pollutants and the membrane used. 
Pollution Abstracts; Water Resources Abstracts; Aqualine Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; surfactant; nanofiltration; membrane fouling; phthalic acid esters; Water treatment; Membranes; Solutes; Hydrophobicity; Pollutants; Fluctuations; Fouling; Filtration; Surfactants; Phthalates; Phthalate esters; Cations; P 2000:FRESHWATER POLLUTION; SW 3060:Water treatment and distribution; AQ 00001:Water Resources and Supplies; Q5 08503:Characteristics, behavior and fate