2011•Advanced materials researchOpen access

Adsorption Equilibrium and Kinetics of Copper from Aqueous Solutions on Steel Slag

Jian Yun Li, Quan Xian Hua, Jun Ling Niu, Jian Wei Tang, Ke Xu

Abstract

The adsorption of copper in aqueous solutions by steel slag was studied in batch adsorption experiments. The adsorption equilibrium data fitted best with Langmuir and Freundlich equations. The adsorption was preferential type. A comparison of the kinetics models on the apparent adsorption rate showed that the adsorption system was best described by the pseudo-second-order kinetics. The adsorption rate was controlled by both liquid film diffusion and intraparticle dispersion.

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Key concepts: Adsorption, Freundlich equation, Copper, Kinetics, Aqueous solution, Diffusion, Langmuir, Materials science