Resumo

BURILLO, Guillermina; SERRANO-GOMEZ, Juan  e  BONIFACIO-MARTINEZ, Juan. Adsorption of Chromium(VI) on Radiation Grafted N,N-dimethylaminoethylmethacrylate onto Polypropylene, from Aqueous Solutions. J. Mex. Chem. Soc [online]. 2013, vol.57, n.2, pp.80-84. ISSN 1870-249X.

Polypropylene (PP) grafted with dimethylaminoethylmethacrylate (DMAEMA), was prepared by irradiation with a ⁶⁰Co γsource. The obtained PP-g-DMAEMA was used to study the Cr(VI) ion adsorption as a function of contact time, initial pH, initial concentration of metal ion and temperature. Chromium adsorption data on PP-g-DMAEMA at various initial concentration fit well the Freundlich and Langmuir isotherms. The maximum adsorption capacity (a_max) was found to be 0.3103 × 0^-4 mol g^-1. The thermodynamic parameters ΔH⁰, ΔG⁰ and ΔS⁰ were estimated showing the adsorption process to be exothermic and spontaneous.

Palavras-chave : Radiation grafting; DMAEMA; adsorption; thermodynamics; chromium.