Original scientific paper

APPLICATION OF DIFFERENT ISOTHERM MODELS ON LEAD IONS SORPTION ONTO ELECTRIC FURNACE SLAG

Lidija Ćurković orcid.org/0000-0002-3212-277X ; Faculty of Mechanical Engineering and Naval Technology, University of Zagreb, Croatia
Alenka Rastovčan-Mioč ; Faculty of Metallurgy, University of Zagreb, Croatia
Marijana Majić orcid.org/0000-0003-4279-0074 ; Faculty of Mechanical Engineering and Naval Technology, University of Zagreb, Croatia
Josip Župan ; Faculty of Mechanical Engineering and Naval Technology, University of Zagreb, Croatia

Abstract

The effect of temperature on the equilibrium sorption of Pb2+ from aqueous solution onto a low-cost electric furnace slag was investigated. In this paper, two-parameter isotherm models namely the Langmuir and the Freundlich and three-parameter isotherm model namely Redlich–Peterson were applied to describe the isotherms and to calculate their constants. The best estimation of the parameters of these models by a non-linear regression analysis was obtained. A comparison between two-parameter and three-parameter isotherms was reported. The characteristic parameters for each isotherms and related coefficient of determination (R2) have been determined using MATLAB 6.5. All the coefficients of determination (R2) of the non-linear method are close to unity. The Redlich−Peterson isotherm produced a higher coefficient of determination values in comparison to all the isotherms studied.

Keywords

lead; electric furnace slag; sorption isotherm

Hrčak ID:

66334

URI

https://hrcak.srce.hr/66334

Publication date:

15.3.2011.

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