REMOVAL OF HYDROGEN SULFIDE, AMMONIA AND NITRITE IONS FROM WATER SOLUTIONS USING MODIFIED ACTIVE CARBONS

摘要

Modified active carbons were used for removal of hydrogen sulfide, ammonia and nitrite ions from water solutions. Obtained results demonstrate that active carbon oxidized with H_2O_2 following impregnation with Co(II) possesses higher adsorption capacity for NH_4~+ compared with unimpregnated samples. It was established that active carbon obtained from nut shells has better oxidation properties compared with active carbons obtained from plum stones. The optimal conditions for adsorption and oxidation of sulfide and hydro-sulfide ions were established. Active carbons impregnated with Fe~(+3) and Cu~(+2) ions possess higher oxidation capacity demonstrating that these catalysts more effectively catalyze the oxidation of sulfide ions to S~Ⅳ and S~Ⅵ species.