Abstract

RODRIGUEZ VALDIVIA, Marcelo; GUZMAN ALE, Rivalino  and  HUAMAN GUTIERREZ, Martha. Aplicación de un diseño experimental en la síntesis hidrotermal de Zeolita Gis-NaP a partir de residuos de ladrillo. Rev. Bol. Quim [online]. 2021, vol.38, n.4, pp.133-147. ISSN 0250-5460.  https://doi.org/10.34098/2078-3949.38.4.1.

This article reports the results of an investigation carried out to obtain a zeolitic material of the Gis-NaP type with a high capacity to exchange cations using brick waste. The hydrothermal synthesis was carried out in a stainless steel reactor using activating NaOH solutions at concentrations of 2.0, 2.5 and 3.0 M, activation temperatures of 100, 120 and 140ºC and activation times of 7, 8 and 9 hours. The product obtained was characterized by X-ray Fluorescence, Scanning Electron Microscopy (SEM), X-ray Diffraction and cation exchange capacity (CEC).

The obtained results showed that the hydrothermal synthesis at the condition of 140°C/2M/7hours, zeolite Gis-NaP with a cation exchange capacity equal to 163.5 meq/100g is obtained. The statistical analysis applying a factorial experimental design, indicated that the main factors with a great effect on the cation exchange capacity (CEC) are the activation temperature and the interaction between it and the concentration of the activating solution, with a degree of significance of 0.049250 and 0.056631 for a confidence level of 90.82%. An empirical and validated mathematical model was developed by applying the ANOVA analysis that considers the interaction effects of all the factors and it was optimized by applying the response surface methodology.

Keywords : Brick waste; Cation exchange capacity; Gis-NaP zeolite; Factorial experimental design; Hydrothermal synthesis.

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