抗污染PES超滤膜含油污水深度处理实验研究  

Experimental study on advanced treatment of oily wastewater using antifouling PES ultrafiltration membrane

作　　者：陈文娟[1,2] 檀国荣[1,2] 张健[1,2] 朱玥珺[1,2] 施鹏[3] 

机构地区：[1]海洋石油高效开发国家重点实验室,北京100027 [2]中海油研究总院,北京100027 [3]西南石油大学化学化工学院,成都610500

出　　处：《膜科学与技术》2016年第5期106-110,115,共6页Membrane Science and Technology

基　　金："十二五"国家科技重大专项项目(2011ZX05024-004)

摘　　要：针对超滤膜处理含油污水时膜污染严重的问题,设计合成了聚乙烯亚胺-聚氧乙烯-聚氧丙烯及聚乙烯亚胺-聚氧丙烯-聚氧乙烯两亲性三元嵌段共聚物,并对聚醚砜(PES)膜进行共混改性.实验结果表明,处理含油污水时,改性PES超滤膜具备良好的抗污染性能.与未改性膜相比,通量衰减率从40.8%降低至31.3%,简单水力清洗后通量恢复率从42.3%增高至99.5%左右.改性剂中的亲水聚氧乙烯链段因其良好的亲水性容易富集到膜表面,利用氢键作用结合水分子形成稳定水化层.污染物很难突破水化层吸附到膜表面上,从而赋予膜以良好的抗污染性能.Two kinds of amphiphilic modifiers, polyethyleneimine-polyoxyethylene-polyoxypropylene （PEI -PEO-PPO） and polyethyleneimine-polyoxyethylene-polyoxypropylene （PEI-PPO-PEO）, were designed and synthesis in order to solve the serious membrane fouling during the application of UF membrane for oily wastewater treatment. Then the antifouling PES ultrafiltration membranes were fabricated by blending modification methods. Experimental results showed that the modified PES ultrafiltration membrane possess superior anti-pollution performance for handling oily wastewater. Compared with the unmodified PES membrane, the flux decay ratio was decreased from 40. 8% to 31.3%, the flux recovery ratio （simple hydraulic cleaning） was increased from 42. 3% to about 99. 5%. The hydrophilic PEO segments segregated onto the membrane surface and then formed a stable hydration layer near the membrane surface via the hydrogen bond. The contaminant was difficult to break the hydration layer and adsorb onto the membrane surface, thus endowing the membrane with a superior antifouling performance.

关 键 词：抗污染 超滤膜 含油污水 深度处理 

分 类 号：X741[环境科学与工程—环境工程] TQ051.893[化学工程]