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- Title
Kinetic and Thermodynamic Studies on the Adsorption of Zinc Ions from Aqueous Solution by the Blast Furnace Slag.
- Authors
Muqing Qiu; Pu Huang
- 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 ∆G0, ∆H0 and ∆S0 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.
- Subjects
CHEMICAL kinetics; THERMODYNAMICS; ADSORPTION (Chemistry); ZINC ions; AQUEOUS solutions; BLAST furnace combustion
- Publication
Nature Environment & Pollution Technology, 2017, Vol 16, Issue 2, p639
- ISSN
0972-6268
- Publication type
Article