SYNTHESIS OF ACTIVATED CARBON FROM SPENT LUBRICATING OIL AND APPLICATION FOR ADSORPTION OF CADMIUM AND LEAD IONS FROM AQUEOUS SOLUTION

摘要

A novel activated carbon was prepared from spent lubricating oil by chemical activation. Preparation of this material involved the oxidation of lubricating oil with a mixture of sulfuric and nitric acid solutions. FT-1R analysis showed the presence of carboxylic, phenolic and lactonic groups on the surface of this material. Equilibrium sorption isotherms prepared for this carbon demonstrate that it has a significantly high capacity for lead and cadmium sorption. A maximum of 250 mg Pb~(2+) and 150 mg Cd~(2+) were adsorbed per gram of this carbon.