作 者：
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机构地区：
西安建筑科技大学环境与市政工程学院
出 处：
《膜科学与技术》
2006年第2期27-31,共5页
摘 要：
利用对城市二级处理水进行了臭氧预氧化,测定了水中残留有机物的分子量分布,并采用PVDF超滤膜对不同分子量分布的二级处理水进行了过滤.结果发现,水中有机物的分子量分布对膜的阻力构成影响很大,堵孔阻力和滤饼阻力对膜污染阻力起控制作用,有机物分子量分布与膜阻力之间有如下关系:1)2/151特别是d/>5/3的有机物则是形成膜表面滤饼的主体.
In this paper, ozonization was used for the secondary effluent and the molecular size distribution of organic matter in water was determined, and polyvinylidenefluoride （PVDF） UF membrane was adopted to filtrate the water with different molecular size distribution Of organic matter. The results indicated that molecular size distribution of organic matter has a great, influence on membrane resistances. The block resistance and cake layer resistance were the major factors causing membrane resistance. The relation between molecular size distribution of organic matter and membrane resistance is as follows： （1） when d/φ〈 2/15 （d： the molecular size of the organic matter in water; φ： membrane pore size）, the organic matter could permeate through the membrane pore easily, while 2/15 〈 d/φ 〈 1/3, the organic matter was inclined to cause adsorption in the surface of membrane pore; （2） when 1/3 〈 d/φ 〈 1 the organic matter mainly lead to the block of the surface of membrane and of pores as well, when 1 〈 d/φ 〈 5/3, the organic matter mainly caused the block of the surface; （3） when d/φ 〉 1, especially d/φ 〉5/3, the organic matter will be the main parts of the cake.
关 键 词：
膜阻力
膜污染
分子量分布
超滤膜
二级处理水
领 域：
[环境科学与工程]
[化学工程]
