ELECTROCOAGULATION DEPOSITION OF Cu(II), Mn(II), Zn(II) AND Fe(III) IONS FROM AQUEOUS SOLUTIONS IN THE PRESENCE OF SODIUM HUMATE ISOLATED FROM EXCESS ACTIVATED SLUDGE OF BIOLOGICAL TREATMENT FACILITIES
The article investigates the effect of sodium humate isolated from the excess activated sludge of biological treatment facilities on the completeness of electrocoagulation deposition ofCu(II), Mn(II), Zn(II) and Fe(III) ions from aqueous solutions has been studied. It was found that the introduction of humates does not affect the deposition of Cu(II) and Zn(II) ions, but significantly improves the deposition of Mn(II) ions. Apparently, this is due to the fact that manganese, as a two-charge ion, is preferable than single-charge hydroxoforms of copper and zinc binds to humic acids to form salts whose molecules have a large molecular weight and are easily sorbed on the surface of iron sol.