Chemical processing in atmospheric aqueous phases, including cloud and fog drops, might be significant reconciling the gap between observed modeled secondary organic aerosol (SOA) properties. In this work, we conducted a relatively comprehensive investigation of reaction products generated from aqueous-phase photochemical oxidation three benzene-diols (resorcinol, hydroquinone, methoxyhydroquin...

We show that the main photochemical processes involved in the phototransformation of anionic ibuprofen (IBP) in surface waters are the reaction with (•)OH, the direct photolysis and possibly the reaction with the triplet states of chromophoric dissolved organic matter ((3)CDOM). These conclusions were derived by use of a model of surface water photochemistry, which adopted measured parameters o...

Halide ions are ubiquitous in natural waters and wastewaters. Halogens play an important and complex role in environmental photochemical processes and in reactions taking place during photochemical water treatment. While inert to solar wavelengths, halides can be converted into radical and non-radical reactive halogen species (RHS) by sensitized photolysis and by reactions with secondary reacti...

Abstract A sustainable photochemical protocol for the oxidation of alcohols to ketones and carboxylic acids has been developed by using 2,4,6‐triphenylpyrylium tetrafluoroborate (TPPT) as organophotocatalyst molecular oxygen oxidant under visible light irradiation. The key reactive species, superoxide (O 2 •− ) first step from alcohol aldehyde singlet ( 1 O second acid, were generated successfu...

With the present theoretical study of the photochemical switching of E-methylfurylfulgide we contribute an important step towards the understanding of the photochemical processes in furylfulgide-related molecules. We have carried out large-scale, full-dimensional direct semiempirical configuration-interaction surface-hopping dynamics of the photoinduced ring-closure reaction. Simulated static a...

in the present study, advanced oxidation treatment, uv/ was applied to decolourisation of acid orange 8 (ao8). the uv radiation was carried out with a 15 w low-pressure mercury lamp. kinetic model for the decolourisation of the dye was developed based on experimental results and known chemical and photochemical reactions. the observed kinetic reaction constant was determined and correlated as a...

environmental issues have attracted many concerns in recent years. life cycle assessment (lca) is a method that evaluates all environmental effects of a product during its life cycle. the objective of this study was to introduce lca [to persian researchers] and to use it in assessment of environmental impact of wheat production in gorgan, ne iran compared to european counties. first, data were ...

1. Experiments are presented which show that the latent period in the photosensory response of Ciona is inversely proportional to the duration of the exposure period to light. From this it is found that the velocity of the chemical reaction which determines the latent period is directly proportional to the concentration of photochemical products formed during the exposure period. This is interp...