Catalytic degradation of methylene blue in aqueous solutions over Ni- and Co- oxide systems

• Autorzy: Maria Stoyanova , Stoyanka Christoskova
• Języki publikacji: EN

Abstrakty

EN

The oxidative catalytic degradation of the cationic dye methylene blue (MB) with NaOCl in aqueous solutions was studied using individual and iron modified Ni- and Co-oxide systems as catalysts. The adsorption extent and the contribution of the uncatalyzed oxidation on the overall degree of MB were determined. The results indicate that methylene blue-a representative of a class of dyestuffs resistant to biodegradation-could be successfully decolorized and degraded using nickel and cobalt oxide catalysts at room temperature. The highest catalytic activity manifests in the Co-oxide system which is consistent with the adsorption data. The oxidative degradation reaction proceeds via first-order kinetics. Temperature has a relatively small effect on the methylene blue degradation kinetics. The results obtained reveal that the catalysts investigated are suitable for oxidative destruction of methytlene blue dye in wastewaters. [...]

Słowa kluczowe

EN

Methylene blue; Catalytic oxidation; Oxide systems; Adsorption; Kinetics

• Czasopismo: Open Chemistry
• Rocznik: 2011
• Tom: 9
• Numer: 6
• Strony: 1000-1007

Daty

wydano

2011-12-01

online

2011-09-27

Twórcy

autor

Maria Stoyanova

• Department of Physical Chemistry, University of Plovdiv, Plovdiv, 4000, Bulgaria,

autor

Stoyanka Christoskova

• Department of Physical Chemistry, University of Plovdiv, Plovdiv, 4000, Bulgaria

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Identyfikatory

DOI

10.2478/s11532-011-0086-7