Preparation and application of titanium dioxide dynamic membranes in microfiltration of oil-in-water emulsions
Preparation and application of titanium dioxide dynamic membranes in microfiltration of oil-in-water emulsions
复制标题
二氧化钛动态膜的制备及其在水包油乳液微滤中的应用
DOI：
10.1016/j.seppur.2012.01.010
复制
发表时间：
2012-03-22
影响因子：
8.6
通讯作者：
Wang, Wei
中科院分区：
文献类型：
--
作者：
Pan, Yanqiu;Wang, Tingting;Wang, Wei
研究了二氧化钛动态膜的制备及其在油水乳状液分离中的应用。错流微滤动态膜在多孔碳管支撑体上形成。研究了制备因素对水包油乳液分离的影响，并通过正交实验确定了最佳制备条件。在最佳工艺条件下制得的动态膜均匀、致密、亲水性好。实验结果表明，当渗透液浓度小于8.3mg/l时，除油率均大于98%。随着载体平均孔径的增大，稳态渗透通量先增大后减小。本文首次提出了动态膜稳态通量衰减率的概念，并将其作为动态膜抗污染能力的指标。分析表明，随着支撑体孔径的增大，膜的稳态FOR先增大后减小，动态膜类型由完全阻塞过滤型向中间阻塞过滤型转变。动态膜对水包油型乳状液的中间堵塞过滤过程中，随着膜孔径的增大，稳态渗透通量缓慢下降。(C)2012爱思唯尔有限公司版权所有。
An experimental investigation was carried out on preparation and application of titanium dioxide dynamic membranes in separation of oil-in-water emulsions via. crossflow microfiltration. The dynamic membrane was formed on a porous carbon tube support. Effects of preparation factors on oil-in-water emulsion separation were studied and the optimal preparation conditions were determined using orthogonal experiments. The dynamic membrane prepared under the optimal conditions was characterized to be uniform, dense and hydrophilic. Experimental results show that oil rejection efficiencies are all higher than 98% with the permeate concentrations less than 8.3 mg/l. The steady permeate flux increases at first, and then decreases with increase in the average support pore size. A novel concept, the steady flux decay ratio (FDR) of dynamic membrane was proposed for the first time as an indicator of anti-fouling ability of dynamic membrane in this work. Analysis displays that the steady FOR first increases and then decreases with increase in the support pore size during which the dynamic membrane type changes from the complete blocking filtration type to the intermediate blocking filtration type. As the pore size increases, the steady permeate flux of dynamic membranes has a slow decline during intermediate blocking filtration of the oil-in-water emulsion. (C) 2012 Elsevier B.V. All rights reserved.