Abstract:

Coke powder is a potential solid waste material, which could be used in purification processes of coking wastewater. To expand the adsorption capacity of coking powder, choosing the suitable modifier of coking powder has became a hot research topic. In the experiment, the modified ability of 0.5mol/L sulfuric acid, 1mol/L nitric acid and 1mol/L sodium hydroxide has been examined. The experiment result shows that acid condition can improve coke powder adsorption ability, and smaller the size of coke powder, the bigger the specific surface, so the better adsorption effect.

Key words: coke powder, coking wastewater, adsorption, COD, NH3-N