Adsorption of β-naphthalenesulfonic acid/sulfuric acid from their solution by weakly basic resin: equilibrium

Article type: Research Article

Authors: LI, Chang-hai | SHI, Peng-fei

Affiliations: Department of Chemicai Engineering, Changchun University of Technology, Changchun 130012, China | Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China

Note: [] Corresponding author. E-mail: lichanghai2000@sina.com

Abstract: Experiments for single and bisolute competitive adsorption were carried out to investigate the adsorption behavior of β-naphthalenesulfonic acid (NSA) and sulfuric acid (H_2SO_4 ) from their solution at 25 °C onto weakly basic resin D301R. Adsorption affinity of sulfuric acid on D301R was found to be much higher than that of NSA. The data of single-solute adsorption were fitted to the Langmuir model and the Freundlich adsorption model. The ideal adsorbed solution theory (IAST) coupled with the single-solute adsorption models were used to predict the bisolute competitive adsorption equilibria. The IAST coupled with the Langmuir and the Freundlich model for sulfuric acid and NSA, respectively, yields the favorable representation of the bisolute competitive adsorption behavior.

Keywords: β-naphthalenesulfonic acid, adsorption, weakly basic resin

Journal: Journal of Environmental Sciences, vol. 17, no. 4, pp. 646-649, 2005