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Fenton-like oxidation of Rhodamine B in the presence of two types of iron (II, III) oxide

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Abstract.
The catalytic efficiency of iron (II, III) oxide to promote Fenton-like reaction was examined by employing
Rhodamine B (RhB) as a model compound at neutral pH. Two types of iron (II, III) oxides were used as
heterogeneous catalysts and characterized by XRD, Mössbauer spectroscopy, BET surface area, particle
size and chemical analyses. The adsorption to the catalyst changed significantly with the pH value and
the sorption isothermwas fitted using the Langmuir model for both solids. Both sorption and FTIR results
indicated that surface complexation reaction may take place in the system. The variation of oxidation
efficiency against H2O2 dosage and amount of exposed surface area per unit volume was evaluated and
correlated with the adsorption behavior in the absence of oxidant. The occurrence of optimum amount of
H2O2 or of exposed surface area for the effective degradation of RhB could be explained by the scavenging
effect of hydroxyl radical byH2O2 or by iron oxide surface. Sorption and decolourization rate of RhB aswell
as H2O2 decomposition rate were found to be dependent on the surface characteristics of iron oxide. The
kinetic oxidation experiments showed that structural FeII content strongly affects the reactivity towards
H2O2 decomposition and therefore RhB decolourization. The site density and sorption ability of RhB on
surface may also influence the oxidation performance in iron oxide/H2O2 system. The iron (II, III) oxide
catalysts exhibited low iron leaching, good structural stability and no loss of performance in second
reaction cycle. The sorption on the surface of iron oxide with catalytic oxidation using hydrogen peroxide
would be an effective oxidation process for the contaminants.

Keywords:
Fenton-like
Iron oxide
Catalysis
Oxidation
Adsorption

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 407–414

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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