Removal of cadmium from industrial wastewater by steel slag

AUTHORS

Parastoo Saki , , Roya Mafigholami 2 , Afshin Takdastan 3

2 Department of Environment Engineering, Islamic Azad University Ahvaz Branch, Ahvaz, IR Iran

3 Department of Environmental Health Engineering, School of Health and Environmental Technology Research Center, Jundishapur University of Medical Sciences, Ahvaz, IR Iran

How to Cite: Saki P, Mafigholami R, Takdastan A. Removal of cadmium from industrial wastewater by steel slag, Jundishapur J Health Sci. Online ahead of Print ; 5(1):23-33.

ARTICLE INFORMATION

Jundishapur Journal of Health Sciences: 5 (1); 23-33
Published Online: March 20, 2013
Article Type: Research Article

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Abstract

The steel slag is the main by-product of steel industry. The aim of this study using the steel slag as a low-cost absorbent in order to remove cadmium pollutant from industrial wastewater.

Some factors that affect the process of cadmium removal by steel slag such as PH, contact time, absorbent dosage and cadmium initial concentration has been studied. Standard solution of synthetic wastewater including cadmium has been prepared by adding Chloride Cadmium to distilled water and concentrations in the range of 5-25 mg/l have been reached.

The results show that in optimum conditions, the removal of cadmium from aqueous solution with concentration about 25mg/l and 60min contact time is about 99%. The experimental data of adsorption equilibrium have been analyzed according to adsorption kinetics models and Freundlich and Longmuir adsorption isotherms. The physical, chemical and morphological features of the steel slag have been determined by XRD, XRF and SEM techniques, too.

The result of the experiments determined that the steel slag could be used as an effective and low-cost method in removing cadmium from industrial wastewater.

Keywords

Slag steel cadmium adsorption the kinetic model the isotherm model

© 2013, Jundishapur Journal of Health Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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