Journal ArticleDOI
Nitrate-induced photooxidation of trace organic chemicals in water.
TLDR
The oxidation kinetics of butyl chloride, nitrobenzene, anisole, and methylmercury in the presence of hydroxyl radical (OH) scavengers were used to determine the rate and quantum efficiency for production of OH from irradiated nitrate ions in water.Abstract:
The oxidation kinetics of butyl chloride, nitrobenzene, anisole, and methylmercury in the presence of hydroxyl radical (OH) scavengers were used to determine the rate and quantum efficiency for production of OH from irradiated nitrate ions in water. The experiments were conducted under steady-state irradiations with monochromatic radiation (313 nm) and with sunlight. The mean quantum efficiency for OH production at 313 nm rises from 0.013 +/- 0.002 at 20 /sup 0/C to 0.017 +/- 0.003 at 30 /sup 0/C in the pH range 6.2-8.2. Results of this study are used to estimate nitrate-induced photooxidation rates of trace organic chemicals under a variety of environmental conditions. 27 references, 6 figures, 2 tables.read more
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Journal ArticleDOI
Triplet and ground state potential energy surfaces of 1,4-diphenyl-1,3-butadiene: theory and experiment
Jack Saltiel,Olga Dmitrenko,Zeena S. Pillai,Rodney F. Klima,Shujun Wang,T. Wharton,Z.-N. Huang,L.J van de Burgt,J. Arranz +8 more
TL;DR: Experimental and calculated relative energies of DPB isomers on the ground and triplet state surfaces agree and theory is relied upon to deduce structural characteristics of the equilibrated conformers in the DPB tripletState.
Journal ArticleDOI
Is Nitrate Anion Photodissociation Mediated by Singlet-Triplet Absorption?
Ondrej Svoboda,Petr Slavíček +1 more
TL;DR: It is argued that a spin-forbidden transition between the singlet ground state and the first triplet state contributes non-negligibly to the nitrate anion photolysis.
Journal ArticleDOI
Photo-Fenton oxidation of 3-amino-5-methylisoxazole: a by-product from biological breakdown of some pharmaceutical compounds.
Bianca M. Souza,Bianca M. Souza,Belisa A. Marinho,Francisca C. Moreira,Márcia Dezotti,Rui A.R. Boaventura,Vítor J.P. Vilar +6 more
TL;DR: Assessment of the removal of 3-amino-5-methylisoxazole (AMI), a recalcitrant by-product resulting from the biological breakdown of some pharmaceuticals, applying a solar photo-Fenton process assisted by ferrioxalate complexes (SPFF) and classical SPF showed a good reproducibility.
Book ChapterDOI
An evaluation of hydroxyl radical formation in river water and the potential for photodegradation of bisphenol A
TL;DR: The influence of the hydroxyl radical (OH) on the photodegradation of the estrogen-like compound, bisphenol A (BPA), was examined in this article.
Book ChapterDOI
Photoinduced and Microbial Degradation of Dissolved Organic Matter in Natural Waters
Khan M. G. Mostofa,Cong-Qiang Liu,Daisuke Minakata,Fengchang Wu,Davide Vione,M. Abdul Mottaleb,Takahito Yoshioka,Hiroshi Sakugawa +7 more
TL;DR: In this article, the authors proposed that solar radiation is a universal and regular phenomenon in biosphere that is vital for all life in the Earth's crust and maintained all the physical, chemical and biological processes of organic matter and dissolved organic matter (DOM) in natural waters.
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