Chemical degradation of EDTA and DTPA in a totally chlorine free (TCF) effluent

In this work, a synthetic TCF effluent containing vanillin, glyoxal, sodium formate, sodium acetate and the chelanting agents EDTA and DTPA was treated using, O3, O3/H2O2, O3/UV, UV, UV/H2O2 and UV/H2O2/O3 at pH 7 and 11. The best results were obtained in the O3/UV process. Ozone alone did not degra...

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Bibliographic Details
Published in:Water Science & Technology 1999, Vol.40 (11-12), p.267-272
Main Authors: RODRIGUEZ, J. B, MUTIS, A, YEBER, M. C, FREER, J, BAEZA, J, MANSILLA, H. D
Format: Article
Language:English
Subjects:
Acetates
Acetic acid
Applied sciences
Biological treatment
Chemical degradation
Chlorine
Edetic acid
Effluents
ethylenediaminetetraacetic acid
Ethylenediaminetetraacetic acids
Exact sciences and technology
Hydrogen peroxide
Industrial wastewaters
Ozone
pH effects
Pollution
Removal
Sodium
Sodium acetate
Sodium formate
Ultraviolet radiation
Vanillin
Wastewaters
Water treatment and pollution
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Summary:In this work, a synthetic TCF effluent containing vanillin, glyoxal, sodium formate, sodium acetate and the chelanting agents EDTA and DTPA was treated using, O3, O3/H2O2, O3/UV, UV, UV/H2O2 and UV/H2O2/O3 at pH 7 and 11. The best results were obtained in the O3/UV process. Ozone alone did not degrade EDTA neither DTPA. A combined O3/UV (pH 7.0 by 15 min)-biological treatment was very efficient in the removal of the chelants (98 %) and COD (95 %).
ISSN:0273-1223
1996-9732
DOI:10.1016/S0273-1223(99)00727-1