Sorption Behavior of Strong Acid Cationic Exchange Fiber for Indium

Abstract

In (III) was quantitative adsorption by strong acid cationic exchange fiber (SACEF) in the medium of pH=2.50 sulphuric aicd. The statically saturated sorption capacity of SACEF was 153.8 mgg-1. 0.5 molL-1 H2SO4 could be used as an eluant. The elution efficiency was 99%. The SACEF could be regenerated and reused without apparent decrease of sorption capacity. The sorption rate constant was k287K=0.09379 gmg-1min-1, k300 K=0.1159 gmg-1min-1, k321 K=0.4046 gmg-1min-1 and k350 K=0.6678 gmg-1min-1, respectively. The apparent sorption activation energy of SACEF for In (III) was 28.28 kJmol-1.The sorption behavior of SACEF for In (III) obeyed the Freundlich isotherm. The enthalpy change was H=5.67 kJmol-1.