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Water 2017, 9(6), 365; doi:10.3390/w9060365

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

1
College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
2
Key Laboratory of Environmental biotechnology, Fujian Province University, Xiamen 361005, China
3
Xiamen Lianchuangda Technology Co., Ltd., Xiamen 361009, China
4
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
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)
View Full-Text   |   Download PDF [1442 KB, uploaded 23 May 2017]   |  

Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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