Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.scitotenv.2006.11.039
Title (Primary) Solar radiation influence on the decomposition process of diclofenac in surface waters
Author Bartels, P.; von Tümpling, W. ORCID logo
Source Titel Science of the Total Environment
Year 2007
Department FLOEK
Volume 374
Issue 1
Page From 143
Page To 155
Language englisch
Keywords diclofenac; solar radiation; photochemical decomposition; aquatic environment; transformation products
Abstract Diclofenac can be detected in surface water of many rivers with human impacts worldwide. The observed decrease of the diclofenac concentration in waters and the formation of its photochemical transformation products under the impact of natural irradiation during one to 16 days are explained in this article. In semi-natural laboratory tests and in a field experiment it could be shown, that sunlight stimulates the decomposition of diclofenac in surface waters. During one day intensive solar radiation in middle European summer diclofenac decomposes in the surface layer of the water (0 to 5 cm) up to 83%, determined in laboratory exposition experiments. After two weeks in a field experiment, the diclofenac was not detectable anymore in the water surface layer (limit of quantification: 5 ng/L). At a water depth of 50 cm, within two weeks 96% of the initial concentration was degraded, while in 100 cm depth 2/3 of the initial diclofenac concentration remained. With the decomposition, stable and meta-stable photolysis products were formed and observed by UV detection. Beyond that the chemical structure of these products were determined. Three transformation products, that were not described in the literature so far, were identified and quantified with GC-MS.
Persistent UFZ Identifier
Bartels, P., von Tümpling, W. (2007):
Solar radiation influence on the decomposition process of diclofenac in surface waters
Sci. Total Environ. 374 (1), 143 - 155 10.1016/j.scitotenv.2006.11.039