Enhanced oxidation · Enhanced micropollutant oxidation by permanganate- and manganese(II)-based processes in presence of dissolved organic matter and hydrogen peroxide
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2021-06-01 → 2023-05-31
- EU contribution
- €191,149
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
Enhanced micropollutant oxidation by permanganate- and manganese(II)-based processes in presence of dissolved organic matter and hydrogen peroxide
This EU MSCA-IF project Enhanced oxidation (No. 101022222) aimed to increase the removal efficiency of organic micropollutants in natural water and wastewaters during drinking water/wastewater treatment process, utilizing oxidation processes involving permanganate and a derived process (i.e. permanganate-hydrogen peroxide combined oxidation). It aimed to simultaneously reduce the side-effects of other oxidation technologies of e.g. disinfection-byproduct formation and high costs, when enhancing the micropollutant oxidation. The micropollutants are currently significant threats to ecosystems and the human health. Even though they are present at trace concentrations, they may bring much higher side-effects such as antibacterial resistance, endocrine disrupting effect, chronic toxicity, etc. Because people take drinking water every day, chemical drinking water safety is of health and economic importance to the whole society. The overall objectives of this study are to enhance the oxidation of micropollutants during water treatment processes, and simultaneously reduce the usage of oxidants by decreasing their amount or the combined usage of another reagent (e.g. hydrogen peroxide).
Data: CORDIS, © European Union
Project objective
Micropollutants are a serious problem for drinking water and wastewater due to their adverse human and ecosystem’s health effects. In Europe, their abatement often involves ozonation with O3 and hydroxyl radical abating a wide spectrum of micropollutants. However, the potential formation of carcinogenic disinfection byproducts such as bromate and N-nitrosamines threatens the safety of drinking water/wastewater. Permanganate (Mn(VII)) is a selective oxidant that is widely applied in pre-oxidation steps in water treatment to remove Mn(II), Fe(II) and taste/odor and produces little disinfection byproducts. It has a high reactivity with phenolic compounds. The applicant found that the phenolic moieties in dissolved organic matter (DOM) produce secondary oxidants with permanganate to enhance micropollutant abatement. Furthermore, the applicant discovered that hydrogen peroxide (H2O2) can not only produce secondary oxidants including Mn(VI) and superoxide radical when reacting with permanganate to enhance micropollutant abatement, but also reduce permanganate to MnO2 that can be removed during coagulation and filtration. Moreover, superoxide and hydroxyl radical were observed to be produced by the Mn(II)-H2O2 reaction. As another matrix, bicarbonate (HCO3–/CO32–) facilitated the Mn(II)-H2O2 reaction to achieve a fast micropollutant abatement, which shows a good application potential for reduced water sources by dosing H2O2. This project aims to investigate the kinetics and mechanisms of the enhancing role of DOM, its surrogate compounds and H2O2 on MnO4–-induced micropollutant abatement. Furthermore, the effectiveness of Mn(II)/H2O2(/HCO3–/CO32–) for micropollutant abatement will be investigated. Both processes will provide alternative enhanced oxidative treatment to abate micropollutants in water and wastewater.
Original text from CORDIS.
Participants
- EIDGENOESSISCHE ANSTALT FUER WASSERVERSORGUNG ABWASSERREINIGUNG UND GEWAESSERSCHUTZ · DubendorfCoordinatorSwitzerland
Links
Data: CORDIS, © European Union