Selective Adsorption of Precious Metals on Sulfur-Containing Chitosan Derivatives

Abstract

Abstract 2-Thienylchitosan and 3-(methylthio)propylchitosan were newly synthesized by crosslinking the corresponding Schiff base derivative before reducing it so that the adsorptive activity was not lowered by the crosslinking. These chitosan derivatives selectively adsorbed gold(III), palladium(II) and platinum(IV) over base metals from hydrochloric acid.