Uptake of CrO42- Ions by Fe-Treated Tri-Calcium Phosphate
DOI:
https://doi.org/10.29356/jmcs.v54i1.962Keywords:
Fe-treated tri-calcium phosphate, chromate ions, adsorption, isotherm, thermodynamics parametersAbstract
CrO42- 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 1.0x10-4 M chromium concentration the adsorption capacity of Fe-treated tri-calcium phosphate for CrO42- ions was 7.10x10-3 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 ∆H0, ∆G0 and ∆S0 were estimated and the obtained results showed that the adsorption reaction was endothermic and spontaneous.
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2019-06-17
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