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
Performance and selectivity of the terephthalic acid probe for OH as a function of temperature, pH and composition of atmospherically relevant aqueous media
T. Charbouillot,T. Charbouillot,Marcello Brigante,Marcello Brigante,Gilles Mailhot,Gilles Mailhot,Pratap Reddy Maddigapu,Claudio Minero,Davide Vione +8 more
TL;DR: In this article, the performance and selectivity of terephthalic acid (TA) as a trapping molecule for the laboratory quantification of photogenerated 2-hydroxyterephthalric acid in synthetic water (where the organic and inorganic concentration is perfectly controlled) was investigated.
Journal ArticleDOI
Amino acid nitrogen in atmospheric aerosols: Occurrence, sources and photochemical modification
Peter J. Milne,Rod G. Zika +1 more
TL;DR: The photochemistry of covalently bound amino groups, particularly as found in peptides and amino acids, is discussed in this article with the purpose of summarizing what is known of their occurrence and their possible importance to atmospheric chemistry.
Journal ArticleDOI
Chemistry of fog waters in California's Central Valley: 2. Photochemical transformations of amino acids and alkyl amines
Keith G. McGregor,Cort Anastasio +1 more
TL;DR: In this article, the fate of 21 amino acids and alkyl amines in fog waters from Davis, California, illuminated with simulated sunlight or monochromatic light was investigated.
Journal ArticleDOI
Effects of HCO3– on Degradation of Toxic Contaminants of Emerging Concern by UV/NO3–
Ying Huang,Minghao Kong,Danielle C. Westerman,Elvis Genbo Xu,Scott Coffin,Kristin H. Cochran,Yiqing Liu,Yiqing Liu,Susan D. Richardson,Daniel Schlenk,Dionysios D. Dionysiou +10 more
TL;DR: Significant reduction in the cytotoxicity of bisphenol A was observed after the treatment with UV/NO3-/HCO3-.
Journal ArticleDOI
Nitrate and Nitrite Ultraviolet Actinometers
TL;DR: In this paper, the authors developed nitrate and nitrite actinometers to determine radiant fluxes from 290 to 410 nm, based on the reaction of the photochemically generated OH radical with benzoic acid to form salicylic acid (SA) and p-hydroxybenzoic acids (pHBA).
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