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
Absolute OH quantum yields in the laser photolysis of nitrate, nitrite and dissolved H2O2 at 308 and 351 nm in the temperature range 278–353 K
TL;DR: In this article, the absolute quantum yields for the formation of OH radicals in the laser photolysis of aqueous solutions of NO3-, NO2- and H2O2 at 308 and 351 nm and as a function of pH and temperature have been measured.
Journal ArticleDOI
Phototransformation of cephalosporin antibiotics in an aqueous environment results in higher toxicity.
TL;DR: In this paper, bicarbonate-enhanced nitrate system contributed most to the loss rate of Cefazolin (CFZ), Cephalexin (CFX), and cephradine (CFD).
Book ChapterDOI
Reactive Oxygen Species in Natural Waters
Neil V. Blough,Richard G. Zepp +1 more
TL;DR: Interest in reactive oxygen species (ROS) in the environment was originally stimulated by certain atmospheric problems such as smog formation, stratospheric ozone depletion, and acid rain this article.
Journal ArticleDOI
Uncertainty and misinterpretation over identification, quantification and transformation of reactive species generated in catalytic oxidation processes: A review.
TL;DR: This review aims to clarify the corresponding issues through surveying literature, including the uncertainty about the identity of radicals in the bulk solution or adsorbed on the catalyst surface in quenching tests, selection of proper scavengers, and the incorrect identification of EPR signals.
Journal ArticleDOI
The photochemistry of aqueous nitrate ion revisited
TL;DR: In this article, aqueous nitrate solution was photolysed at 254 nm in the absence of oxidizable additives, in the presence of methanol or propan-2-ol and oxygen and in the case of cyclopentane under anaerobic conditions.
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