Oxidant-reactive carbonous moieties in dissolved organic matter: Selective quantification by oxidative titration using chlorine dioxide and ozone
| Autor: | Joanna Houska, Urs von Gunten, Nicolas Walpen, Elisabeth Salhi |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Ozone waste-water Dissolved organic matter Oxidative titration Chlorine dioxide Electron-donating capacity Molecular tagging Electron-rich moieties Phenols Oxidation byproducts drinking-water ozonation micropollutants Dissolved Organic Matter Redox chemistry.chemical_compound Dissolved organic carbon Phenol Waste Management and Disposal functional-groups Water Science and Technology Civil and Structural Engineering Chemistry disinfection by-products Ecological Modeling Oxides Oxidants Pollution rate constants Oxidative Stress Wastewater kinetics Environmental chemistry uv absorbency Titration Chlorine Chlorine Compounds |
| Zdroj: | Water Research, 207 |
| ISSN: | 1879-2448 0043-1354 |
| Popis: | The application of oxidants for disinfection or micropollutant abatement during drinking water and wastewater treatment is accompanied by oxidation of matrix components such as dissolved organic matter (DOM). To improve predictions of the efficiency of oxidation processes and the formation of oxidation products, methods to determine concentrations of oxidant-reactive phenolic, olefinic or amine-type DOM moieties are critical. Here, a novel selective oxidative titration approach is presented, which is based on reaction kinetics of oxidation reactions towards certain DOM moieties. Phenolic moieties were determined by oxidative titration with ClO2 and O3 for five DOM isolates and two secondary wastewater effluent samples. The determined concentrations of phenolic moieties correlated with the electron-donating capacity (EDC) and the formation of inorganic ClO2-byproducts (HOCl, ClO2−, ClO3−). ClO2-byproduct yields from phenol and DOM isolates and changes due to the application of molecular tagging for phenols revealed a better understanding of oxidant-reactive structures within DOM. Overall, oxidative titrations with ClO2 and O3 provide a novel and promising tool to quantify oxidant-reactive moieties in complex mixtures such as DOM and can be expanded to other matrices or oxidants. Water Research, 207 ISSN:0043-1354 ISSN:1879-2448 |
| Databáze: | OpenAIRE |
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