SciELO - Scientific Electronic Library Online

 
vol.54 número1Anion Exchange Behaviour of Zr, Hf, Nb, Ta and Pa as Homologues of Rf and Db in Fluoride MediumCharacterization of Archaeological Ceramic from Lagartero, Chiapas, Mexico, by Nuclear and Conventional Techniques índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Journal of the Mexican Chemical Society

versión impresa ISSN 1870-249X

Resumen

SERRANO-GOMEZ, Juan et al. Uptake of CrO42- Ions by Fe-Treated Tri-Calcium Phosphate. J. Mex. Chem. Soc [online]. 2010, vol.54, n.1, pp. 34-39. ISSN 1870-249X.

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 1.0×10-4 M chromium concentration the adsorption capacity of Fe-treated tri-calcium phosphate for CrO42- 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.

Palabras llave : Fe-treated tri-calcium phosphate; chromate ions; adsorption; isotherm; thermodynamics parameters.

        · resumen en Español     · texto en Inglés     · pdf en Inglés