Response of zeta potential to cake formation and pore blocking during the microfiltration of latex particles
Response of zeta potential to cake formation and pore blocking during the microfiltration of latex particles
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DOI：
10.1016/j.memsci.2012.02.013
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发表时间：
2012-05
影响因子：
9.5
通讯作者：
Kazuho Nakamura;Takako Orime;Kanji Matsumoto
中科院分区：
文献类型：
--
作者：
Kazuho Nakamura;Takako Orime;Kanji Matsumoto
通过监测过滤阻力和流动电位，研究了胶乳悬浮液微滤过程中膜的zeta电位对孔堵塞和滤饼形成的响应。滤饼过滤和孔堵塞过滤过程中的浊度变化规律有很大的不同。在滤饼过滤过程中，膜的固有zeta电位Δ m变化为滤饼层的zeta电位Δ c，这取决于滤饼层的水力阻力占总过滤阻力的比例。在堵孔过滤和滤饼过滤中，滤饼过滤开始后，浊度从0.01跳到0.01和0.02之间的某个值，并变得几乎稳定。堵塞孔处的zeta电位ε B取决于堵塞孔和堵塞颗粒表面之间的差距，并指示孔堵塞的程度。实验结果表明，过滤过程中的压降变化既反映了压降的位置，也反映了局部zeta电位的变化。
The responses of zeta potential of membrane, ζobs, to the pore blocking and cake formation during microfiltration of latex particle suspension were studied by monitoring both the filtration resistance and streaming potential during the filtration. The pattern of the change in ζobsduring the filtration was quite different between the cake filtration and the pore blocking filtration. In the cake filtration ζobschanged from the intrinsic zeta potential of membrane, ζm, to the zeta potential of cake layer, ζc, depending on the proportion of the hydraulic resistance of the cake layer to the total filtration resistance. In the pore blocking filtration followed by the cake filtration ζobsjumped from ζmto a certain value between ζmand ζcjust after the start of the filtration and became almost stable. The zeta potential at the blocked pore, ζb, depended on the gap between surfaces of the blocked pore and the blocking particle and indicated the extent of pore blocking. It was confirmed that the change in ζobsduring filtration will reflect both the location of pressure drop and the local zeta potential.