Resumo

QUISPE, Luz et al. ELIMINACIÓN DE CIANURO MEDIANTE SISTEMA COMBINADO UV/H₂O₂/TiO₂. Rev. Bol. Quim [online]. 2011, vol.28, n.2, pp.113-118. ISSN 0250-5460.

ABSTRACT   In the present work, aqueous cyanide has been eliminated by addition of H₂O₂ as oxidant agent, and by heterogeneous photocatalysis with titanium oxide activated with UV radiation. The titanium oxide was synthesized by Sol-Gel method and Atrane route, it was characterized by X-ray Diffraction, Physical adsorption of gas N₂, Spectroscopy of Reflectance Diffuse UV-vis, Electronic Microscopy of Transmission. It was evaluated the effect of hydrogen peroxide quantity (%V_H2O2/V_CN- 0.1; 0.5; 1.0 and 3.0 %) for CN^- elimination. The titanium oxide presents a high activity due its own structure-property relation: anatase crystalline phase, adequate crystalline microdomine sizes and high area superficial. Independent systems were evaluated for cyanide elimination: CN-UV, CN-UV/H₂O₂ y CN-UV/TiO₂. Finally, a combined system CN-UV/H₂O₂/TiO₂ was tested, which presents the faster elimination of cyanide compared with the independent systems

Palavras-chave : TiO₂; Atrane Route; Cyanide; Catalysis homogeneous; Photocatalysis.

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