title: Fluorescence analysis of photoinduced degradation of ecotoxicants in the presence of humic acids.
abstract: The photolysis of humic acids and phenols in water containing humic acids was investigated. Humic acids extracted from peat (Vasuygan Bog, Tomsk Region, Russian Federation) induce the phototransformation of 4-chlorophenol at 365 and 222 nm. Humic acids were characterized by UV-, fluorescence-, IR- and EPR-spectroscopy and laser-induced fluorescence. The influence of humic acids on the phototransformation of phenols in different irradiation conditions was investigated. Comparison of the data on mercury lamp irradiation showed that the most effective phenols degradation was observed under exposure to KrCl* exilamp light (lambda = 222 nm) in the presence of humic acids.
authors.affiliation: Tomsk State University, 36 Lenine Ave, Tomsk 634050, Russia. tchon@phys.tsu.ru
authors.forename: O N
authors.initials: ON
authors.lastname: Tchaikovskaya
authors.forename: I V
authors.initials: IV
authors.lastname: Sokolova
authors.forename: N V
authors.initials: NV
authors.lastname: Yudina
mesh_terms: D002733:Chlorophenols / Q000737:chemistry / Q000528:radiation effects; D006812:Humic Substances; D010636:Phenols / Q000737:chemistry* / Q000528:radiation effects; D010782:Photolysis; D012987:Soil; D013050:Spectrometry, Fluorescence; D013057:Spectrum Analysis; D014466:Ultraviolet Rays; D014873:Water Pollutants / Q000528:radiation effects
chemical_list: D002733:Chlorophenols; D006812:Humic Substances; D010636:Phenols; D012987:Soil; D014873:Water Pollutants; C029107:4-chlorophenol