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ADSORPTION OF CHROMIUM FROM WASTEWATER BY PLATANUS ORIENTALIS LEAVES

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Author(s): A. H. Mahvi, R. Nabizadeh,F. Gholami, A. Khairi

Journal: Iranian Journal of Environmental Health Science & Engineering
ISSN 1735-1979

Volume: 4;
Issue: 3;
Start page: 191;
Date: 2007;
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Keywords: Cadmium removal | Platanus orientalis leaves | ash | aqueous solution

ABSTRACT
The Cr (VI) adsorption characteristics of platanus orientalis leaves and their ash were examined as a function of contact time, initial pH and metal ion concentration. Batch adsorption experiments were performed. The effects of Ca2+, Mg2+, Na+ and K+ on adsorption were studied. The effect of this adsorbent on COD in wastewater showed that 2g/L of adsorbent caused increase of 110mg/L and 76mg/L COD in deionized water in 120 minutes for platanus orientalis leaves and their ash , respectively. The maximum removal took place in the pH range of 6-7, contact time of 60 minutes and initial concentration of 2mg/L. Studies showed that the Freundlich adsorption model better fitted with the results than Langmuir with R2 > 0.85. The study showed platanus orientalis leaves ash was more favorable than living ones as well as in removing chromium from the aqueous solution.

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