Removal of Cadmium from Aqueous Solution by Nano Structured γ-Alumina

آب و فاضلاب

卷:22

Seyed Hassan Zavar Mousavi¹  Mostafa Fazli¹  Akram Rahmani² 

[1] Assoc. Prof. of Chemistry, Faculty of Sciences, Semnan University, Semnan;

[2] M.Sc. Student of Applied Chemistry, Faculty of Sciences, Semnan University, Semnan;

关键词: Removal;    cadmium;    Nano Structured Alumina;    Adsorption;    Isotherm;    Kinetic;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this study the use of nano structured γ-alumina as a new and convince adsorbent for removal of cadmium ions from aqueous solution was investigated. The equilibrium adsorption level was determined as a function of the solution pH, temperature, contact time, initial adsorbate concentration and adsorbent doses. Adsorption isotherms of Cd(II) on adsorbents were determined and correlated with common isotherm equations such as Langmuir, Freundlich and Tempkin models. The isotherm data fitted well to the Langmuir isotherm. The maximum adsorption capacity for Cd(II) on nano structured γ-alumina was 76.92 mg g-1. The adsorption kinetics was investigated and the best fit was achieved by a second-order equation. The thermodynamic parameters such as free energy (ΔG0), enthalpy (ΔH0) and entropy changes (ΔS0) for the adsorption of Cd(II) were computed to predict the nature of adsorption process.

【 授权许可】

Unknown