Wang Cheng-Cai, Juang Lain-Chuen, Hsu Ting-Chu, Lee Chung-Kung, Lee Jiunn-Fwu, Huang Fu-Chuang
Green Environment R&D Center and Department of Environmental Engineering, Van-Nung Institute of Technology, Chung-Li 320, Taiwan, Republic of China.
J Colloid Interface Sci. 2004 May 1;273(1):80-6. doi: 10.1016/j.jcis.2003.12.028.
Ca-montmorillonite (Ca-Mont) was exchanged with titanium cations and the adsorption equilibrium and kinetics of Basic Green 5 (BG5) and Basic Violet 10 (BV10) on these montmorillonites were measured to examine the ion-exchange effects on the basic dyes adsorption. The relationship between the dye adsorption and the alteration of pore structures of montmorillonite induced by ion-exchange processes was discussed. Moreover, the changes in the surface and pore structure of montmorillonites during adsorption were characterized based on classical and fractal analyses of the nitrogen adsorption isotherms as well as the XRD patterns. The decrease in BET surface area of montmorillonites after adsorption of dyes was interpreted in terms of both the coverage of some surface roughness (surface screening effect) and the inhibition of the movement of nitrogen molecule into some pores (pore blocking effect). The surface fractal dimension D was used to examine whether or not the surface screening effect exists and the pore blocking effect was examined with the changes of mean pore size before and after adsorbing basic dyes.
将钙蒙脱石（Ca-Mont）与钛阳离子进行离子交换，并测定碱性绿5（BG5）和碱性紫10（BV10）在这些蒙脱石上的吸附平衡和动力学，以研究离子交换对碱性染料吸附的影响。讨论了染料吸附与离子交换过程引起的蒙脱石孔结构变化之间的关系。此外，基于氮气吸附等温线的经典分析和分形分析以及XRD图谱，对蒙脱石在吸附过程中的表面和孔结构变化进行了表征。染料吸附后蒙脱石BET表面积的减小可从一些表面粗糙度的覆盖（表面屏蔽效应）和氮分子进入一些孔隙的运动受到抑制（孔堵塞效应）两方面来解释。表面分形维数D用于检验表面屏蔽效应是否存在，通过吸附碱性染料前后平均孔径的变化来检验孔堵塞效应。
