title: Photodegradation of endocrine disrupting chemical nonylphenol by simulated solar UV-irradiation.
abstract: The photolysis of nonylphenol (NP) was investigated using a solar simulator in the absence/presence of dissolved organic matter (DOM), HCO3-, NO3- and Fe(III) ions. The effects of different parameters such as initial pH, initial concentration of substrate, temperature, and the effect of hydrogen peroxide concentration on photodegradation of nonylphenol in aqueous solution have been assessed. The results indicate that the oxidation rate increases in the presence of H2O2, Fe(III) and DOM with dissolved organic carbon concentrations not higher than 3 mg L(-1). Phenol, 1,4-dihydroxylbenzene and 1,4-benzoquinone were identified as intermediate products of photodegradation of nonylphenol, through an HPLC method. In addition, the disappearance of the estrogenic activity of nonylphenol during irradiation using YES test was investigated. Based upon the YES test results, there was a strong decrease of estrogenic activity of nonylphenol after 80 h irradiation in the presence of hydrogen peroxide.
authors.affiliation: Water Chemistry, Engler-Bunte-Institute, University of Karlsruhe, Engler-Bunte-Ring 1, 76131 Karlsruhe, Germany. mariana.neamtu@web.de
authors.forename: Mariana
authors.initials: M
authors.lastname: Neamţu
authors.forename: Fritz H
authors.initials: FH
authors.lastname: Frimmel
mesh_terms: D001639:Bicarbonates / Q000737:chemistry; D001681:Biological Assay; D052244:Endocrine Disruptors / Q000737:chemistry / Q000378:metabolism / Q000528:radiation effects*; D004967:Estrogens / Q000737:chemistry / Q000378:metabolism / Q000528:radiation effects*; D006812:Humic Substances; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D009566:Nitrates / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010636:Phenols / Q000737:chemistry / Q000378:metabolism / Q000528:radiation effects*; D010782:Photolysis; D011960:Receptors, Estrogen / Q000378:metabolism; D013696:Temperature; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000378:metabolism / Q000528:radiation effects*; D015003:Yeasts
chemical_list: D001639:Bicarbonates; D052244:Endocrine Disruptors; D004967:Estrogens; D006812:Humic Substances; D009566:Nitrates; D016877:Oxidants; D010636:Phenols; D011960:Receptors, Estrogen; D014874:Water Pollutants, Chemical; C025256:nonylphenol; D006861:Hydrogen Peroxide; D007501:Iron