Resumo

CUERVO BLANCO, Tatiana; SIERRA, César A  e  ZEA, Hugo R. Nanostructured MnO₂ catalyst in E. crassipes (water hyacinth) for indigo carmine degradation. Rev.Colomb.Quim. [online]. 2016, vol.45, n.2, pp.30-38. ISSN 0120-2804.  https://doi.org/10.15446/rev.colomb.quim.v45n2.60395.

The use of water hyacinth's dried matter (Eichhornia crasippes) as a support matrix for nano-MnO₂ and its application for the removal of indigo carmine RIC) was studied. Different pretreatment processes were tested and results indicated that an acid-alkali pretreatment is an efficient method to binding nanoparticles RNPs) to cellulosic matrix. In adittion, the MnO₂ NPs were synthesized by sonochemical reduction of MnO₄^- using different methods Rultrasonic horn system, ultrasonic bath and reaction with ethanol), where the influence of the precursor concentration was observed. The synthesized material was further characterized by ATR-IR, AAS, XRD, SEM, nitrogen isotherms adsorption, EDS, and pH_pzc. The IC removal capacity of the nanostructured material, the chemical nature of the degradation products and the effect of various parameters Rtemperature, pH, initial IC concentration, among others) were explored in water samples.

Palavras-chave : Eichhornia crassipes; indigo carmine; nanostructured material; manganese oxide.

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