ELECTRODEPOSITION AND ADSORPTION OF DIXANTHOGEN ON THE SURFACE OF PYRRHOTITE ELECTODE

In this paper,the xanthate oxidation on the surface of pyrrhotite is studied by using various electrochemical test measurements.Experimental results demonstrate that the xanthate formed on pyrrhotite surface is dixanthogen.Kinetic equation of xanthate oxidation on the surface of pyffhotite is deduced using Potentiostatic Technique,and the oxdation rate is defined by the electrochemical kinetics parameter.In addition,Chronocoulometry Technique was carried on pyrrhotite electrode at different soiution pH value.The results show that the hydrophobic dixanthogen layer adsorbed on mineral surface would become feeble with increasing pH value.The quantites of adsorbed layer are 3.04 dixanthogen molecules at pH 6.82 solution,as 2.14 dixanthogen molecules at pH 9.18 solution and 0.98 dixanthogen molecule at pH 11.0 solution.