Adsorption of beta-naphthalenesulfonic acid/sulfuric acid from their solution by weakly basic resin: equilibrium.
Experiments for single and bisolute competitive adsorption were carried out to investigate the adsorption behavior of beta-naphthalenesulfonic acid (NSA) and sulfuric acid (H2SO4) from their solution at 25 degrees 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.
Li
Chang-Hai
CH
Department of Chemical Engineering, Changchun University of Technology, Changchun 130012, China. lichanghai2000@sina.com
Si
Peng-Fei
PF
D000327:Adsorption; D008956:Models, Chemical; D009282:Naphthalenesulfonates / Q000737:chemistry*; D012996:Solutions; D013464:Sulfuric Acids / Q000737:chemistry*
D009282:Naphthalenesulfonates; D012996:Solutions; D013464:Sulfuric Acids; C033158:sulfuric acid