Species distribution of polymeric aluminium-ferrum--timed complexation colorimetric analysis method of Al-Fe-Ferron

Article type: Research Article

Authors: Hu, Yong-you | Tu, Chuan-qin | Wu, Hong-hai

Affiliations: College of Paper & Environmental Engineering, South ChianUniversity of Technology, Guangzhou, 510640. E-mail:ppyyhu@suct.edu.cn; pphhwu@letterbox.scut.edu.cn

Abstract: The effects of the colorimetric buffer solutions were investigated while the two colorimetric reactions of A1-ferron complex and Fe-ferron complex occurred individually, and the effects of the testing wavelength and the pH of the solutions were also investigated. A timed complexation colorimetric analysis method of A1-Fe-ferron in view of the total concentration of {A1+Fe} was then established to determine the species distribution of polymeric Al-Fe. The testing wavelength was recommended at 362 nm and the testing pH value was 5. Based on the ratios of n_Al/n_Fe, the standard adsorption curves of the polymeric Al-Fe solutions were derived from the experimental results. Furthermore, the solutions composition were various in both the molar n_Al/n_Fe ratios, i.e. 0/0, 5/5, 9/1 and 0/10, and the concentrations associated with the total [Al + Fe] that ranged from 10^-^5 to 10^-^4 mol/L.

Keywords: polymeric aluminum-ferrum, Al-Fe-ferron, timed complexation colorimetric analysis method, species distribution

Journal: Journal of Environmental Sciences, vol. 13, no. 4, pp. 418-421, 2001