Informatics Publishing Limited

Muqing Qiu ¹, Pu Huang ²

Affiliations
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Environmental Protection Agency of Dinghai District Zhoushan, Zhoushan, 312000, CN

Abstract

In this work, the adsorption ability of the blast furnace slag to adsorb Zn²⁺ ions in aqueous solution was investigated. The experimental results are discussed in detail. The adsorption kinetic studies showed that the adsorption of Zn²⁺ ion from aqueous solution by the blast furnace slag better fits to pseudo second order kinetic model. It implies that the predominant process is chemisorption, which involves a sharing of electrons between the adsorbate and the surface of the adsorbent. The adsorption isotherm studies showed that Langmuir adsorption isotherm model was more suitable for the Zn²⁺ ion from aqueous solution than the Freundlich adsorption isotherm model. It was also suggested that the adsorption process was homogeneous adsorption. The thermodynamic parameters of ΔG0, ΔH0 and ΔS0 are -0.04 kJ/mol, 51.35 kJ/mol and 165.42 J.mol^-1.K^-1 respectively. It implied that the adsorption process is an endothermic reaction and chemical adsorption process.

Keywords

Kinetic Studies, Adsoption, Zinc, Blast Furnace Slag.

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