in water decompn. at pH below 1.0;

in water Kinetics; at pH = 4.6 - 7.0;;

Fe2O3#dotCu(2+) in water Kinetics; byproducts: O2, H(1+); Irradiation (UV/VIS); irradiation of an peroxosulfate soln. in water containing the catalyst with visible light from a 150-W xenon lamp (after cutting off UV and IR radiations with glass filter and water jacket) at room temp. at natural pH; estimation of HSO5(1-) iodometrically;

in water Kinetics; at pH = 4.6 - 7.0;;