Degradação de corantes reativos por processo foto-fenton envolvendo o uso de peneira molecular 4A modificada com Fe3+

Química Nova

Franciély Ignachewski²  Sérgio Toshio Fujiwara²  Luiz Fernando Cótica¹  Livia Melo Carneiro¹  Elias Tauchert¹  Patricio Peralta-zamora¹ 

[1] ,Universidade Estadual do Centro-Oeste Departamento de Química Guarapuava PR ,Brasil

关键词: degradation of reactive dyes;    Fe3+ immobilized;    Fenton-like;   

DOI  :  10.1590/S0100-40422010000800004

来源: SciELO

【 摘 要 】

In this work the preparation and characterization of a supported catalyst intended for degradation of reactive dyes by Fenton-like processes is described. The photocatalyst was prepared by immobilization of Fe3+ into the molecular sieve (4A type) surface and characterized by x-ray diffractometry and infrared, Mössbauer and EPR spectroscopy. The solid containing 0.94% (w/w) of ferric ions was used in degradation studies of aqueous reactive-dyes samples with really promissory results. Generally, Vis-assisted photochemical processes leads to almost total decolorization of all tested dyes at reaction times lower than 30 min. It was also observed that the iron-molecular sieve matrix can be reused.

【 授权许可】

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