Titlebook: Environmental Photochemistry; Pierre Boule Book 1999 Springer-Verlag Berlin Heidelberg 1999 Environmental Analysis.Environmental Toxicolog

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Phototransformations Induced in Aquatic Media by NO 3 - /NO 2 - , FeIII and Humic Substances,This review describes the reaction mechanisms of three typical classes of compounds which play a role in the photochemical processes occurring in natural waters, namely nitrate ions, Fe. salts and humic substances.

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The Role of Solar Radiation in Atmospheric Chemistry,highly reactive radical fragments. Knowledge of photo-dissociation rate coefficients (. values) is crucial to understanding the behavior of global stratospheric and tropospheric ozone, the atmospheric lifetimes of gases such as carbon monoxide, methane, and non-methane hydrocarbons, and the formatio

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Emission and Flash Techniques in Environmental Photochemistry,y relevant chemicals. After a brief discussion of the photochemical processes which an excited state can undergo, the techniques of conventional (microsecond) flash photolysis and laser flash photolysis (nanosecond to femtosecond) are described, together with fluorescence lifetime methods. All the t

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Atmospheric Degradation of Anthropogenic Molecules,atmospheric chemistry, the concept of atmospheric lifetime is presented and the degradation mechanisms of alkanes, aromatics, nitrogen oxides, SO., chlorofluorocarbons, halons, hydrofluorocarbons, and hydrochlorofluorocarbons are discussed. Areas of uncertainty are highlighted.

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Aquatic Photochemical Reactions in Atmospheric, Surface, and Marine Waters: Influences on Oxidant Fecies in rapid reversible equilibrium. The photochemical sources, fates, and environmental effects of various photo-reactants are discussed. It is concluded that in the oceans, hydroxyl radical (.OH) and the aquated electron (e..) will ultimately oxidize and reduce, respectively, nearly all organic

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Singlet Oxygen in the Environment,mpartments, its potential roles in chemical reactions under environmental conditions are not completely understood. For example, in the atmosphere, it is formed at lower elevations (<40km) by photolysis of ozone and by energy transfer to ground-state oxygen from photoexcited donor species. In the io

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The Photochemistry of PAHs and PCBs in Water and on Solids,ental and laboratory settings. Photoproducts have been identified in many instances. In the presence of O., the photochemistry of PAHs is dominated by oxidation, with either singlet O. or Superoxide serving as oxidant. The factors which dictate whether energy transfer or electron transfer occurs fro

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Mechanism of Phototransformation of Phenol and Derivatives in Aqueous Solution,ain emphasis is on photo-degradation of compounds of actual environmental relevance or structurally related to such compounds, such as halogen-, nitro-, or cyano-substituted phenols in aqueous solutions, and on the photosensitizing action of phenolic compounds.

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Phototransformation of Pesticides in Aqueous Solution,ect photodegradation. We investigated the influence of the spectroscopic properties of pesticides and their effects on the nature of the photochemical reactions with the oxygen species, adjuvants of formulation, humic acids, and water. Chemical reactions, especially elimination, substitution and hyd

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Photodegradation of Lipidic Compounds During the Senescence of Phytoplankton,n. After a brief discussion of the main photooxidation reactions which can occur in the euphotic zone of the oceans, emphasis is given to the photodegradation of lipids during the senescence of phytoplankton. Production and quenching of excited states of chlorophyll and toxic oxygen species (singlet