Sorption behavior of some lanthanides on polyacrylamide stannic molybdophosphate as organic–inorganic composite

International Journal of Industrial Chemistry

دوره 7، شماره 3، آذر 2016، صفحه 231-240

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-016-0080-1

نویسندگان

E. A. Abdel-Galil^* ؛ A. B. Ibrahim؛ M. M. Abou-Mesalam

Atomic Energy Authority, Hot Labs. Center, P.O. 13759, Cairo, Egypt

چکیده

Sorption behavior of some lanthanide ions such as lanthanum and samarium ions on polyacrylamide stannic molybdophosphate {PASnMoP} as organic–inorganic composite has been investigated. The distribution coefficients of La³⁺ and Sm³⁺ ions in different pH media on PASnMoP were determined with the selectivity order La³⁺ > Sm³⁺. Capacity of PASnMoP for La³⁺ and Sm³⁺ ions was determined and found 24.66 and 15.38 mg g⁻¹ for La³⁺ and Sm³⁺ ions, respectively. The resin dosage dependence for the sorption behavior for La³⁺ and Sm³⁺ ions on polyacrylamide stannic molybdophosphate was conducted. The adsorption isotherms were described by means of Langmuir and Freundlich isotherms for La³⁺ and Sm³⁺ ions. The Langmuir model represented the adsorption process better than the Freundlich model. The kinetic data were tested using Logergren-first-order and Pseudo-second-order kinetic models. The data correlated well with the Pseudo-second-order kinetic model, indicating that the chemical adsorption was the rate limiting step. Thermodynamic parameters ΔG°, ΔH° and ΔS° were also calculated and the data showed that the ion exchange of La³⁺ and Sm³⁺ ions on PASnMoP was spontaneous and endothermic in nature.

کلیدواژه‌ها

Distribution coefficient؛ Lanthanides؛ Sorption isotherm؛ Polyacrylamide stannic molybdophosphate؛ Composite؛ Thermodynamic