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bingd600420(金币+30, 翻译EPI+1):很好 多谢啊 2011-01-15 09:32:17
不容易啊，终于完成了。楼主斟酌！
The formation of complex compound, resulting from reaction of metal ions of various types and electronic configurations with hydrophilic hydroxyl on the surface of nanocrystalline ZrO2 coating on the ceramic membrane, is bound to change the surface conditions and performance of the original ceramic membrane, affecting ion distribution at and near the interface between the membrane and filter medium, which would has a further impact on the permeation flux. The influence of concentration of NaCl and MgCl2 on permeation flux under the conditions of a pressure difference of 0.1MPa, pH 7 and a room temperature of 298K, is shown in Fig.4. Permeation flux shows a remarkable decreasing trend when MgCl2 concentration increases, because of the characteristic adsorption of Mg2+ on the membrane surface. On the contrary, the increase in NaCl concentration leads to a slight increase in permeation flux, since characteristic adsorption of NaCl does not happen on the membrane surface. In electrolyte solutions some water molecules are at dynamic balance with clusters of different sizes, others are present in the form of radial symmetry with ion in the center. When the geometrical/structural conditions are given, the interaction between membrane surface state/structure and water molecules with different structures is the primary internal factor which determines permeation flux. |
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