Simultaneous Determination of Pore Size and Surface Charge Density of Microfiltration Membranes by Streaming Potential Measurement
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概要
- 論文の詳細を見る
It has been demonstrated that the pore size and surface charge density of microfiltration (MF) membranes can be determined from the streaming potential (SP) measured over a wide range of KCl concentrations using a microscopic model for the SP. The SP was measured for the MF membranes made of various materials and with various pore sizes. The absolute value of ζobs, which was obtained using the Helmholtz–Smoluchowski (HS) equation, reached a maximum value with increasing KCl concentration and could be assigned to a theoretical zeta potential, ζtheory, at higher KCl concentrations. The SP versus conductivity plots showed unique curves reflecting changes in both the surface charge density and the behavior of the electric double layers (EDLs) in the pore, which will overlap at lower conductivity but be compressed at higher conductivity. The pore size and surface charge density were simultaneously determined by the analysis of this change in SP using the microscopic model for SP. In polycarbonate membranes the pore size obtained by this analysis showed a good linear relationship with the nominal pore size, which is almost equal to the morphological pore size determined by SEM image analysis, although the absolute value of the pore size obtained by this analysis was lower than the nominal pore size.
- Society of Chemical Engineers, Japanの論文
- 2012-07-01
著者
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Matsumoto Kanji
Department Of Chemical Engineering Graduate School Of Engineering Yokohama National University
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Nittami Tadashi
Department Of Chemical Engineering Graduate School Of Engineering Yokohama National University
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Nakamura Kazuho
Department Of Chemical Engineering Yokohama National University
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Nakamura Kazuho
Department Of Chemical Engineering Graduate School Of Engineering Yokohama National University
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Nittami Tadashi
Department Of Chemical Engineering Yokohama National University
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Matsumoto Kanji
Dep. Of Chemical Engineering Yokohama National Univ.
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HIRAYAMA Wakako
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University
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Matsumoto Kanji
Department Of Chemical And Energy Engineering Graduate School Of Engineering Yokohama National University
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Nittami Tadashi
Department Of Chemical And Energy Engineering Graduate School Of Engineering Yokohama National University
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Nakamura Kazuho
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University
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