... impurities in liquid or gas phase in the chemical . oil and gas , metallurgical , water treatment and environmental protection ... respiratorPT107Effluent recovery0.45-0.50≤5≥85Pb+Zn:≥0.015mg/gH2O:≥65%Purification and recovery of electrolytic and electropating solutionPT108Liguor ... 1000mg/gDecolourization and deodo rization in medical , food , oil and fats , brewing and saccharin etc. Activated Carbon