Resumo

LINARES, Carlos F et al. Natural zeolite as adsorbent of urea. Rev. Fac. Ing. UCV [online]. 2014, vol.29, n.3, pp.83-88. ISSN 0798-4065.

An Iranian natural phillipsite zeolite was characterized by different techniques such as: X-ray diffraction, Fourier- Transformed spectroscopy (FT-IR) and BET specific surface area measurements. The phillipsite zeolite was contacted with urea solutions of different concentrations. After the contacting, different adsorption models were assessed such as: Langmuir, Freundlich y Langmuir-Freundlich. Results showed the formation of a urea monolayer, at an early stage and finally a urea multilayer was formed, in concordance with the Langmuir-Freundlich model.

Palavras-chave : Adsorption isotherm; Phillipsite; Urea; Characterization; Dialysis.

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