MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
J Hazard Mater. 2012 Oct 15;235-236:128-37. doi: 10.1016/j.jhazmat.2012.07.031. Epub 2012 Jul 20.
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 (L(m)) 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.
采用聚醚砜（PES）膜平板组件，研究了不同浓度的阳离子Gemini 表面活性剂（N1-十二烷基-N1，N1，N2，N2-四甲基-N2-辛基乙二胺溴化物，CG）、传统阳离子表面活性剂（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，Brij35）对苯酚废水超滤的综合性能。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、渗透通量和胶束污染的影响。还利用分配系数（D）、胶束负载量（L(m)）和平衡分配常数（K）来估计胶束增强超滤对苯酚的增强能力。采用扫描电子显微镜（SEM）、衰减全反射附件傅里叶变换红外光谱（ATR-FTIR）和压汞仪分析了原始膜和污染膜的膜表面形态、膜材料特性和膜污染。基于上述分析，与具有相等烷基链长的其他常规表面活性剂相比，所选择的Gemini 表面活性剂在以下几个方面表现出优异的性能：苯酚/表面活性剂的截留率（苯酚截留率的峰值为 95.8%）、渗透通量和膜污染。这些结果表明，具有特殊结构的 CG 表面活性剂在采用胶束增强超滤处理含酚废水方面具有良好的应用前景。
