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电场强化陶瓷膜超滤牛血清蛋白
The Process Enhancement of γ-Al2O3 Ceramic Membrane in the Separation of BAS by Electrical Fields
【摘要】 以相对分子质量67 000的牛血清蛋白(BSA)为分离对象,通过膜通量、截留率、膜通量衰减程度和恢复率等膜参数的测定,考察了外加直流电场作用陶瓷膜(γ-Al2O3)的分离性能。结果表明,外加正电场陶瓷膜的膜通量和截留率都有所提高,20 V/cm时,分别提高了67%和46.8%,而膜通量衰减程度由84.64%降低到60.87%,经过"电场自净"的陶瓷膜,其膜通量的恢复率可达95%以上,能较大改善膜的抗污染性能。
【Abstract】 The performance of γ-Al2O3membrane under an external electric field,including flux,retention rate,declines and recovery of the performance,was investigated by the ultrafiltration of BSA.The results showed that both flux and retention rate of γ-Al2O3 membrane increased under external positive electric fields of 20 V/cm by 67% and 46.8%,respectively.The flux decline decreased from 84.64% to 60.87% and the flux recovery rate was higher than 95% by "self-cleaning electric fields".Therefore,the anti-fouling property of ceramic membrane can be greatly improved by an electric field.
【Key words】 electric field; ceramic membrane; ultrafiltration; BSA; biological engineering;
- 【文献出处】 精细化工 ,Fine Chemicals , 编辑部邮箱 ,2008年09期
- 【分类号】Q51-3
- 【被引频次】5
- 【下载频次】255