The catalytic oxidation of malachite green by the microwave-Fenton processes.
Water Sci Technol
; 62(6): 1304-11, 2010.
Article
in En
| MEDLINE
| ID: mdl-20861544
ABSTRACT
Catalytic oxidation of malachite green using the microwave-Fenton process was investigated. 0% of malachite green de-colorization using the microwave process and 23.5% of malachite green de-colorization using the Fenton process were observed within 5 minutes. In contrast 95.4% of malachite green de-colorization using the microwave-Fenton was observed in 5 minutes. During the microwave-Fenton process, the optimum operating conditions for malachite green de-colorization were found to be 3.40 of initial pH, 0.08 mmol/L of Fe2+ concentration and 12.5 mmol/L of H2O2 concentration. Confirmatory tests were carried out under the optimum conditions and the COD removal rate of 82.0% and the de-colorization rate of 99.0% were observed in 5 minutes. The apparent kinetics equation of -dC/dt=0.0337 [malachite green]0.9860[Fe2+)]0.8234[H2O2]0.1663 for malachite green de-colorization was calculated, which implied that malachite green was the dominant factor in determining the removal efficiency of malachite green based on microwave-Fenton process.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Rosaniline Dyes
/
Water Pollutants, Chemical
/
Water Purification
/
Hydrogen Peroxide
/
Iron
/
Microwaves
Country/Region as subject:
Asia
Language:
En
Journal:
Water Sci Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2010
Document type:
Article
Affiliation country:
China