Homogeneous oxidation of phenols in aqueous solution with hydrogen peroxide and ferric ions

The chemical oxidation of phenol and chlorophenols with hydrogen peroxide in the presence of soluble iron can be economically attractive at low oxidant consumption, leading then to intermediates that are more easily biodegradable. The homogeneous oxidation of phenol and chlorophenols in aqueous solu...

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Bibliographic Details
Published in:PRETREATMENT OF INDUSTRIAL WASTEWATERS II 1997, Vol.36 (2-3), p.151-154
Main Authors: GRIGOROPOULOU, H, PHILIPPOPOULOS, C
Format: Article
Language:English
Subjects:
Ambient temperature
Ammonium
Ammonium sulfate
Anions
Applied sciences
Aqueous solutions
Biodegradability
Biodegradation
Catalysts
Chemical attack
Chlorophenol
Exact sciences and technology
Ferric chloride
Ferric ions
Ferric salts
Hydrogen
Hydrogen peroxide
Hydrogen storage
Industrial wastewaters
Iron
Oxidation
Oxidation resistance
Phenols
Pollution
Salts
Sulfates
Trichlorophenols
Wastewaters
Water treatment and pollution
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Summary:The chemical oxidation of phenol and chlorophenols with hydrogen peroxide in the presence of soluble iron can be economically attractive at low oxidant consumption, leading then to intermediates that are more easily biodegradable. The homogeneous oxidation of phenol and chlorophenols in aqueous solutions with hydrogen peroxide is studied at oxidant : phenol ratio of about 4:1 and 16:1 (mol/mol) at various catalyst concentrations, at ambient temperature without pH control. Ferric chloride, ferric and ferrous sulphate and ferrous ammonium sulphate are used as oxidation catalysts. Ferric salts induce higher oxidation rates than ferrous ones and the nature of the anions present does not affect reaction rate. 4-Chlorophenol is found to be most resistant to oxidation and 2,4,6-Trichlorophenol is not attacked by hydrogen peroxide in the presence of ferric ions at the experimental conditions studied.
ISSN:0273-1223
1996-9732
DOI:10.1016/S0273-1223(97)00382-X