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Revista Cubana de Química

versão On-line ISSN 2224-5421


FARIAS-PINEIRA, Tania; PICAZO-MOZO, Omitzu; CONCEPCION ROSABAL, Beatriz  e  CHARLES-DE MENORVAL, Louis. Cuban clinoptilolite for rhodamine B adsorption. Characterization of the obtained zeolite-dye materials. Rev Cub Quim [online]. 2018, vol.30, n.2, pp.175-190. ISSN 2224-5421.

In the present work, the adsorption of the fluorescent dye rhodamine B (RB) onto a Cuban natural zeolite (NZ) was studied. The isotherm adsorption could be fitted by the Langmuir and Freundlich models and it was verified that the adsorption is favored in acid pH. Kinetics studies indicated that the adsorption followed a pseudo, second order kinetic model. More than the 92 % of the RB in solution is captured by the zeolite in a wide range of initial concentrations, which constitutes an excellent result for environmental applications. The characterization of the composite materials showed a good thermal stability and homogeneous distribution of RB on NZ surface. The dye exhibits an increase in fluorescence intensity when it is absorbed onto NZ, so NZ-RB samples could be good candidates for their use as sensors and in optic systems.

Palavras-chave : zeolite; clinoptilolite; rhodamine B; dye removal.

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