The role of UV-irradiation pretreatment on the degradation of 2,4-dichlorophenoxyacetic acid in water

• Published in: Luminescence (Chichester, England) Vol. 26; no. 3; pp. 156 - 161
• Main Authors: Tchaikovskaya, O., Sokolova, I., Mayer, G.V., Karetnikova, E., Lipatnikova, E., Kuzmina, S., Volostnov, D.
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.05.2011
• Subjects: 2,4-Dichlorophenoxyacetic Acid - chemistry; 2,4-Dichlorophenoxyacetic Acid - metabolism; 2,4‐dichlorophenoxyacetic acid; 4-dichlorophenoxyacetic acid; activated sludge; Bacteria - metabolism; Biodegradation, Environmental; Environmental Restoration and Remediation - methods; Herbicides - chemistry; Herbicides - metabolism; humic acids; Kinetics; photobiodegradation; Photolysis - radiation effects; Ultraviolet Rays; UV-irradiation; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - metabolism
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.1198

The degradation of 2,4‐dichlorophenoxyacetic acid (2,4‐D) in water by the combination process of UV‐irradiation, humic acids and activated sludge treatment has been studied. The photoreaction rate of all irradiated samples was lowest for the sample irradiated at 308 nm (the XeCl excilamp) in the absence and in the presence of humic acids, and highest for the sample irradiated at 222 nm (the KrCl excilamp). Photolysis of 2,4‐D has been shown to enhance the subsequent microbial degradation. Copyright © 2010 John Wiley & Sons, Ltd.