Adsorption and colloidal behaviour of traces of tellurium(IV) in aqueous solutions

Abstract

Various NaCl solutions containing traces of tellurium(IV) have been prepared. The effects of tellurium(IV) concentration and pH on the adsorption of tellurium(IV) on filter paper have been studied by filtration method. The effects of NaCl concentration, tellurium(IV) concentration and pH on the formation of a colloid have been also studied by ultracentrifugation and ultrafiltration methods. It has been found that tellurium(IV), at concentrations below about 10−10M, in neutral NaCl solutions is adsorbed on filter paper and shows colloidal behaviour.