Brunauer-Emmett-Teller (B.E.T.), Langmuir and Freundlich Isotherm Studies for the Adsorption of Nickel Ions onto Coal Fly Ash

Article type: Research Article

Authors: Agarwal, Ajay K.^{a; *} | Kadu, Mahendra S.^a | Pandhurnekar, Chandrashekhar P.^b | Muthreja, Ishwerdas L.^c

Affiliations: [a] Civil Engineering Department, Shri Ramdeobaba College of Engineering and Management, Nagpur – 440 013, India | [b] Chemistry Department, Shri Ramdeobaba College of Engineering and Management, Nagpur – 440 013, India | [c] Department of Mining Engineering, Visvesvaraya National Institute of Technology, Nagpur – 440 022, India

Correspondence: [*] Corresponding Author. [email protected]

Abstract: The removal of nickel ions by adsorption process using fly ash was investigated in this study. Nickel removal capacity of fly ash was performed by batch mode adsorption experiment using Atomic Absorption Spectroscopy (AAS) technique. The results obtained were fitted to Brunauer-Emmett-Teller (BET), Langmuir and Freundlich adsorption isotherms using least square fit method. The best fit among the isotherm models is assessed by the linear coefficient of regression (R2) and by non-linear Chi-square test. The theoretical value of qe calculated from the best fit linear equation of each adsorption isotherm and the experimental values of qe are plotted against Ce, to compare the experimental and theoretical value of qe. It was observed by linear and non-linear method that BET adsorption isotherm is best fit for the present investigation.

Keywords: Fly ash, nickel, BET, Langmuir, Freundlich, adsorption isotherms

DOI: 10.3233/AJW-160016

Journal: Asian Journal of Water, Environment and Pollution, vol. 13, no. 2, pp. 49-53, 2016