Uptake of CrO4(2-) Ions by Fe-Treated Tri-Calcium Phosphate

CrO4(2-) ion adsorption on Fe-treated tri-calcium phosphate was studied by batch experiments as a function of contact time, initial concentration of metal ion and temperature. Adsorption results showed that at pH 5.5 and 1.0×10-4 M chromium concentration the adsorption capacity of Fe-treated tri-cal...

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Bibliographic Details
Published in:Journal of the Mexican Chemical Society 2010-03, Vol.54 (1), p.34-39
Main Authors: Serrano-Gómez, Juan, Ramírez-Sandoval, Jorge Luis, Bonifacio- Martínez, Juan, Granados-Correa, Francisco, Badillo-Almaraz, Verónica Elizabeth
Format: Article
Language:eng ; por
Subjects:
Chemistry, Multidisciplinary
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Summary:CrO4(2-) ion adsorption on Fe-treated tri-calcium phosphate was studied by batch experiments as a function of contact time, initial concentration of metal ion and temperature. Adsorption results showed that at pH 5.5 and 1.0×10-4 M chromium concentration the adsorption capacity of Fe-treated tri-calcium phosphate for CrO4(2-) ions was 7.10 × 10-3 mmol/g. Chromium adsorption data on Fe-treated tri-calcium phosphate at various initial concentration fitted the Freundlich isotherm. By temperature studies the thermodynamic parameters ΔH0, ΔG0 and ΔS0 were estimated and the obtained results showed that the adsorption reaction was endothermic and spontaneous.
ISSN:1870-249X