Adsorption of phosphate by blast furnace slag under different conditions
不同条件下高炉渣吸附水中无机磷的研究

Blast furnace slag(BFS)is a by-product of steel industry. Research on the utilization of BFS is important. Factors that make a contribution to phosphate adsorption properties related to water quenching slag were investigated with experiments. Data acquired from the linear regression indicate that the sorption data all fit in well with Langmuir adsorption isotherms at a significant level of 0.5%, and the effect of adsorption is correlative with its component, the slag with higher alkalinity showed the higher capacity of P sorption.The adsorption capacity decreased with the increasing pH values in solution, also the final pH values increased in solutions with initial pH of 2,4,and it decreased in solutions of pH=10,12.The sorption process of P onto BFS surface carries on spontaneously, it is an exothermic process.