Effect of chemical composition on electrokinetics of diaspore |
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Authors: | Liu Xiaowen Hu Yuehua Xu Zhenghe |
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Affiliation: | School of the Resources Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China. |
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Abstract: | The effect of chemical composition of diaspores on their electrokinetics was studied. Increasing SiO(2) content in a diaspore sample was found to decrease its isoelectric point. The X-ray diffraction and SEM microanalysis showed the absence of distinct SiO(2) phases. A linear correlation was found to exist between the measured isoelectric point and alumina to silica mass ratio in diaspore samples. The linear regression analysis of the experimental data suggests a more significant impact of silicon content than aluminum content, indicating a preferential adsorption of dissolved silicon on diaspore samples and/or preferential dissolution of aluminum from diaspore samples. |
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