title: Effect of chemical composition on electrokinetics of diaspore.
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.
authors.affiliation: School of the Resources Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China.
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Liu
authors.forename: Yuehua
authors.initials: Y
authors.lastname: Hu
authors.forename: Zhenghe
authors.initials: Z
authors.lastname: Xu