Removal of emerging contaminants from secondary effluents by micellar-enhanced ultrafiltration

被引:58
作者
Acero, Juan L. [1 ]
Javier Benitez, F. [1 ]
Real, Francisco J. [1 ]
Teva, Fernando [1 ]
机构
[1] Univ Extremadura, Inst Univ Invest Agua Cambio Climat & Sostenibili, Dept Ingn Quim, Badajoz 06006, Spain
关键词
Micellar-enhanced ultrafiltration; Emerging contaminants; Secondary effluent; Ultrafiltration membranes; WASTE-WATER; AQUEOUS-SOLUTION; SULFONAMIDE ANTIBIOTICS; DISSOLVED ORGANICS; METHYLENE-BLUE; NANOFILTRATION; WASTEWATERS; ENVIRONMENT; MICROPOLLUTANTS; SURFACTANT;
D O I
10.1016/j.seppur.2017.03.021
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The removal of 11 selected emerging contaminants (ECs, acetaminophen, metoprolol, caffeine, antipyrine, sulfamethoxazole, flumequine, ketorolac, atrazine, isoproturon, 2-hydroxybiphenyl and diclofenac) by micellar-enhanced ultrafiltration (MEUF) has been investigated. Anionic sodium dodecylsulfate (SDS), non-ionic surfactants Triton X-100 (TX-100) and Tween 20 (TW-20), and cationic surfactants cetylpyridinium chloride (CPC) and cetyl trimethyl ammonium bromide (CTAB) were used. The retention coefficients of the selected compounds were determined in order to evaluate the separation efficiency of ECs from surfactant micelles. It was found that cationic surfactants were more appropriated for the removal of negatively charged and hydrophobic ECs. However, the presence of surfactant decreased the permeate flux due to the concentration polarization and membrane fouling. Among surfactants, the best results in terms of lower membrane fouling and higher retention of ECs were obtained with CPC. In addition, the effects of the MWCO of UF membranes and the water matrix on ECs and CPC removal and on membrane fouling were also evaluated. The increase of the feed CPC concentration improved the removal of ECs, although the permeate flux decreased. The removal of ECs and CPC was not affected by trans-membrane pressure. According to these results, solubilisation of ECs in the micelles and retention of the micelles by the membrane govern the overall retention process. (C)2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:123 / 131
页数:9
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