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Open AccessArticle

Study of the Removal of Aniline from Wastewater via MEUF Using Mixed Surfactants

College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Key Laboratory of Environmental biotechnology, Fujian Province University, Xiamen 361005, China
Xiamen Lianchuangda Technology Co., Ltd., Xiamen 361009, China
Faculty of Engineering, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada
Author to whom correspondence should be addressed.
Academic Editor: Jiangyong Hu
Water 2017, 9(6), 365;
Received: 15 April 2017 / Revised: 10 May 2017 / Accepted: 19 May 2017 / Published: 23 May 2017
(This article belongs to the Special Issue Modeling of Water Systems)
In this paper, the anionic surfactant sodium dodecyl sulfate (SDS) and the bio-surfactant rhamnolipid are mixed to achieve micellar-enhanced ultrafiltration, and the associated aniline removal efficiency is investigated. The impacts of five factors, including the mixing ratio of the SDS concentration to the rhamnolipid concentration, the pH, the salinity, the operating pressure, and the aniline concentration in the feed solution, on the aniline rejection and the membrane permeation flux are explored. The aniline rejection mechanism of the rhamnolipid mixture surfactant is analyzed. This study shows that the effect of these factors on the aniline rejection is in the order of pH > mixing ratio > operating pressure > aniline concentration > salinity; the factors that affect the membrane permeation flux are in the order of mixing ratio > operating pressure > salinity > pH > aniline concentration. Under the optimal test conditions (i.e., SDS:rhamnolipid = 8:2, pH = 5, salinity = 250 mmol/L, operating pressure = 3.5 bar, aniline concentration = 1.5 mM), the verification test results showed an aniline rejection of 78.36%. View Full-Text
Keywords: micellar-enhanced ultrafiltration; aniline; rhamnolipid; orthogonal experiment micellar-enhanced ultrafiltration; aniline; rhamnolipid; orthogonal experiment
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Fu, H.-Y.; Zhang, Z.-B.; Chai, T.; Huang, G.-H.; Yu, S.-J.; Liu, Z.; Gao, P.-F. Study of the Removal of Aniline from Wastewater via MEUF Using Mixed Surfactants. Water 2017, 9, 365.

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