Preparation Of Ultra-filtration Membrane And Its Performance Research

This paper consists of five chapters. In the first chapter, the fundamentals and features of various methods oftreatment of wastewater containing heavy mentals are reviewed. The problems of re-pollution are raised in the course of wastewater-treatment. The evaluation of various methods of treatment technology are discussed.In the second chapter, chitosan and 2% acetic acid were selected to cast membrane. The effects of casting solution composition and several- factors on membrane performance were studied. The UF membrane with molecular weight cut off 67000 can be made by selecting proper composition of casting solution and preparation condition. The rejection was more than 90% in separation of 0.1% Bovine Serum albumin.In the third chapter, Preparation and properties of chitosan film were studied . Optimal process conditions of chitosan solution filming were defined. The UF film of water rate is 2-3 mL/ cm2h and the rejection of 0.1% Bovine Serum albumin is more than 90% can be made. The possibilities of removing heavy mental from waste-water with UF film were studied. The experimental results indicated that selecting CS film may be able to remove colloidal heavy mental ions effectively such as Pb2+ Cd2+. Zn2+. Cu2+ hydroxides through changing pH values.In the fourth chapter, A method for the primary speciation analysis of Mn, Mg and K in Chinese herbals Poria cocos (schw.) wolf separated by ultrafiltration. The decoction of sample was divided two species including soluble and suspended solid by 0.45祄 filter membrane. All kinds of speciation of mentals were separated furtherly by ultrafiltration membrane of 0.22祄, 0.1 5祄, 6.6nm and 3.8nm. All above mental species were determined by flame atomic absorption spectrometry. The results showed that the size of compounds of Mg, K is bigger than Q.22[im. Some of them is smaller than 3.8nm. The size of compounds of Mn is distributed in a range of 3.8nm~0.45祄. Others is smaller than 3.8nm.In the fifth chapter, The amounts of eight elements CUN Zn. Mg. Ca. Fe. K and Na in the hen's egg. duck's egg. quail's egg. goose's egg as well as human blood were investigated, respectively. The studied result shows that the distribution of amount of eight elements in the eggs is similar to that of in human blood, and the amount of six elements Qu Zn. 1V. Ca. Fe and Mn in egg whit is much less than that in yolk.