142 research outputs found
Competitive kinetics versus stopped flow method for determining the degradation rate constants of steroids by ozonation
Get PDFChemical oxidation of dissolved organic matter by chlorine dioxide, chlorine, and ozone:Effects on its optical and antioxidant properties
Get PDFEnhanced Bromate Formation during Chlorination of Bromide-Containing Waters in the Presence of CuO: Catalytic Disproportionation of Hypobromous Acid
Full text linkDissolution and biodurability: Important parameters needed for risk assessment of nanomaterials
Get PDFUntersuchungen �ber die Tr�bungsreaktion nach Hoign� zum Nachweis einer Allergensensibilisierung
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Photo-sensitized oxidation in natural water via .OH radicals
No full textA method is presented for determining production and consumption rates of .OH radicals produced photochemically in natural surface waters. It is based on the determination of the kinetics by which the concentration of a specified trace compound decreases during irradiation. In samples from Lake Greifensee (Switzerland) low production rates for .OH limit its possible effects. In addition, fast consumptions by the natural dissolved organic solutes and by the bicarbonate protect organic micropollutants from oxidation by .OH. Neither direct nor indirect H2O2 photolysis was a significant source of .OH in the lakewater studied lacking iron, whereas nitrate photolysis could have been a source. Comparison with reaction kinetic formulations allows generalizations for other types of waters
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