Removal of phenol from synthetic waste water using Gemini micellar-enhanced ultrafiltration (GMEUF).
Removal of phenol from synthetic waste water using Gemini micellar-enhanced ultrafiltration (GMEUF).
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DOI：
10.1016/j.jhazmat.2012.07.031
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发表时间：
2012-10
影响因子：
13.6
通讯作者：
Wenxiang Zhang;G. Huang;Jia Wei;Huiqin Li;Rubing Zheng;Ya Zhou
中科院分区：
文献类型：
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作者：
Wenxiang Zhang;G. Huang;Jia Wei;Huiqin Li;Rubing Zheng;Ya Zhou
采用不同浓度的阳离子Gemini表面活性剂（N1-十二烷基-N1，N1，N2，N2-四甲基-N2-辛基乙烷-1，2-二胺溴化铵，CG）、常规阳离子表面活性剂（十二烷基三甲基溴化铵，DTAB）、阴离子表面活性剂（十二烷基硫酸钠，SDS）和非离子表面活性剂（十二烷氧基聚乙氧基乙醇，Brij 35）对含酚废水进行了超滤实验研究。在这项调查中采用的平板组件与聚醚砜（PES）膜。考察了进料浓度（苯酚和表面活性剂）对苯酚和表面活性剂截留率、膜通量和胶束膜污染的影响。利用分配系数（D）、胶束负载量（Lm）和平衡分配常数（K）评价了胶束强化超滤对苯酚的超滤能力。采用扫描电子显微镜（SEM）、傅里叶变换红外光谱仪（ATR-FTIR）和压汞仪对膜表面形貌、膜材料特性和膜污染进行了分析。在此基础上，对Gemini表面活性剂在苯酚截留率（苯酚截留率峰值为95.8%）、渗透通量和膜污染等方面的性能进行了上级，结果表明Gemini表面活性剂的性能优于其它具有相同烷基链长的表面活性剂。这些结果表明，具有特殊结构的CG表面活性剂在胶团强化超滤处理含酚废水中具有良好的应用前景。
Comprehensive studies were conducted on the phenol wastewater ultrafiltration (UF) with the help of various concentrations of cationic Gemini surfactant (N1-dodecyl-N1,N1,N2,N2-tetramethyl-N2-octylethane-1,2-diaminium bromide, CG), conventional cationic surfactant (dodecyl trimethyl ammonium bromide, DTAB), anionic surfactant (sodium dodecyl sulfate, SDS) and nonionic surfactant ((dodecyloxy)polyethoxyethanol, Brij35). A flat sheet module with polyethersulfone (PES) membrane was employed in this investigation. The effects of feed concentration (phenol and surfactant) on the retention of phenol and surfactant, permeate flux and membrane fouling by micelles were evaluated. The distribution coefficient (D), the loading of the micelles (Lm) and the equilibrium distribution constant (K) were also utilized to estimate the micellar-enhanced ultrafiltration ability for phenol. Scanning electron microscope (SEM), Fourier transform infrared spectrometer with attenuated total reflectance accessory (ATR-FTIR) and mercury porosimeter were applied to analyze membrane surface morphology, membrane material characteristics and membrane fouling for the original and fouled membranes. Based on the above analysis, the performance of the selected Gemini surfactant was proved superior in the following aspects: retention of phenol/surfactant (peak value is 95.8% for phenol retention), permeate flux and membrane fouling with respect to other conventional surfactants possessing equal alkyl chain length. These results demonstrated that CG surfactant with exceptional structure has favorable prospects in the treatment of phenol wastewater by the micellar-enhanced ultrafiltration.