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Adsorption of copper, cadmium and zinc on manganese and iron oxide coated zeolite from aqueous solution was investigated in a batch mode. Experiments were conducted to investigate the effects of the initial concentration of metals, initial pH, contact time and temperature on the adsorption of ions. According to the results, adsorption of ions on manganese and iron oxide coated zeolite increased with the enhancement of initial Cu2+, Zn2+ and Cd2+ concentrations and contact time and also with increase of temperature. The results showed that at the beginning, the adsorption rate of Cu2+ and Cd2+ was more than 90 %. This rate continued to be slower for Zn2+ in both zeolites. Furthermore, the amount of Cu2+, Zn2+, and Cd2+ adsorption on the manganese oxide coated zeolite (qe) was equal to 14 mg/g, 9 mg/g and 16 mg/g and on the iron oxide coated zeolite it was 11 mg/g, 7 mg/g and 13mg/g, respectively. It was shown that at the concentrations below 100 mg/dm3 adsorption was rapid and almost all heavy metals were adsorbed. As a result, the significant factor affecting qe is the proportion of weight to liquid and pH in the solutions. Finally, the results showed that the adsorption of Zn2+, Cu2+ and Cd2+ onto the manganese oxide coated zeolite followed both the Langmuir and Freundlich isotherm models.
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Strony
894--908
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Bibliogr. 50 poz., rys., tab.
Twórcy
autor
- Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
autor
- Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
autor
- Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-6beb5000-ab34-4899-8bab-1cdc329655ee