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- W2948462230 abstract "The carbonate radical (CO3•-) is a strong oxidative radical that is generated via the reactions of HCO3-/CO32- with hydroxyl radical (HO•) or triplet states of dissolved organic matter (3DOM∗) in sunlit surface water. The bimolecular reaction rate constants of CO3•- with various DOM isolates ( [Formula: see text] ) were calculated as 15-239 (mg of C/L)-1 s-1 and were correlate to the bulk DOM properties, such as the content of phenolic moieties, the specific UV absorbance (SUVA), the E2/E3 value, and the fluorescence index (FI). The spectroscopic E2/E3 values was found to strongly correlated (R2 = 0.93) with [Formula: see text] , and an empirical equation was established. Our results also demonstrate that CO3•- is involved in the photobleaching of dissolved organic matter (DOM) and in particular reacts with electron-donor moieties, leading to faster decay rates at long wavelengths of UV-vis absorption. Furthermore, a model was developed to calculate the steady-state concentrations of CO3•- during DOM photobleaching. These results allow us to estimate the reactivity of DOM with CO3•- and to evaluate the role of CO3•- in sunlit surface water. It will also allow a better assessment of the concentration and utilization of CO3•- during the application of advanced oxidation processes." @default.
- W2948462230 created "2019-06-14" @default.
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- W2948462230 date "2019-09-01" @default.
- W2948462230 modified "2023-10-17" @default.
- W2948462230 title "Photochemical formation of carbonate radical and its reaction with dissolved organic matters" @default.
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- W2948462230 doi "https://doi.org/10.1016/j.watres.2019.06.002" @default.
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