National Research Base of Intelligent Manufacturing Service, Chongqing Key Laboratory of Catalysis & New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China.
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China.
J Colloid Interface Sci. 2020 Jun 15;570:20-30. doi: 10.1016/j.jcis.2020.02.104. Epub 2020 Feb 26.
Membrane filtration is a promising technology for the treatment of alkali/surfactant/polymer (ASP) flooding oilfield wastewater, which contains high concentration of salt, surfactant, polymer and crude oil. The interactions of key foulants may influence the degree of membrane fouling. By comparing flux decline and interfacial free energies, it should be possible to derive the foulants governing the interactions with the membrane.
Polytetrafluoroethylene microfiltration membrane was employed to treat eleven types of model solutions to understand the effect of the interactions of key foulants on membrane fouling. The extended Derjaguin-Landau-Verwey-Overbeek theory was used to quantify the foulant-membrane and foulant-foulant interaction energies. The cake models were implemented to analyze the fouling form. Fourier transform infrared spectroscopy, atomic force microscopy, and contact angle were used to study the surface properties of various membranes.
Microfiltration experiments and thermodynamic analysis revealed that both ions and sodium dodecylbenzenesulfonate could mitigate membrane fouling caused by anionic polyacrylamide (APAM) and crude oil. Moreover, APAM would produce a "shielding effect" on crude oil fouling. In addition, complete pore blocking, which primarily occurred on the membrane surface and formed a fouling layer, was the dominant form of membrane fouling.
膜过滤技术是处理含有高浓度盐、表面活性剂、聚合物和原油的碱/表面活性剂/聚合物（ASP）驱油田废水的一种很有前途的技术。关键污染物的相互作用可能会影响膜污染的程度。通过比较通量下降和界面自由能，应该可以得出控制与膜相互作用的污染物。
采用聚四氟乙烯微滤膜处理 11 种模型溶液，以了解关键污染物相互作用对膜污染的影响。扩展的德热加廖夫-朗道-维韦尔-奥弗贝克理论用于量化污染物-膜和污染物-污染物相互作用能。采用滤饼模型分析了污染形式。傅里叶变换红外光谱、原子力显微镜和接触角用于研究各种膜的表面性质。
微滤实验和热力学分析表明，离子和十二烷基苯磺酸钠都可以减轻阴离子聚丙烯酰胺（APAM）和原油引起的膜污染。此外，APAM 会对原油污染产生“屏蔽效应”。此外，主要发生在膜表面并形成污染层的完全孔堵塞是膜污染的主要形式。
