Filtration Mechanism in Cake Filtration of Macromolecule /Fine Particle Mixtures
Dead-end ultrafiltration of the mixtures of titanium dioxide (TiO2) of the rutile form and bovine serum albumin (BSA) was performed, and the average specific filtration resistance α av of the filter cake was measured under various conditions of the salt concentration and TiO2/BSA mixing ratio at pH 4.2 where both TiO2 and BSA were charged positively. For salt-free suspensions, the value of α av increases with an increase of the mixing ratio of BSA because α av of BSA is significantly larger than that of TiO2. However, when the salt is added, α av in the range of quite small BSA fractions tends to become smaller than α av of cake composed of TiO2 alone. These unique variations of α av can be explained based on the zeta potential of colloids and the mean particle size. Thus, the variation of the stability of particles plays a vital role in determining the filterability of macromolecule/fine particle mixtures.
Ultrafiltration Macromolecule Fine Particle Filter cake Specific filtration resistance Zeta potential Mean particle size Flocculation
Yasuhito Mukai Eiji Iritani
Department of Chemical Engineering, Nagoya University Furo-cho, Chikusa-ku, Nagoya 464-8603, JAPAN
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）