Pulsed corona discharge oxidation of aqueous carbamazepine micropollutant
| Autor: | Leif Kronberg, Sergey Preis, Iakov Kornev, Ewelina Krzymyk, Petri Ajo, Marjatta Louhi-Kultanen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0208 environmental biotechnology
02 engineering and technology Wastewater 010501 environmental sciences 01 natural sciences Water Purification Ozone Environmental Chemistry Waste Management and Disposal Effluent Corona discharge 0105 earth and related environmental sciences Water Science and Technology Aqueous solution Hydroxyl Radical Chemistry General Medicine Biodegradation 020801 environmental engineering Waste treatment Biodegradation Environmental Carbamazepine Chemical engineering Sewage treatment Water treatment Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Environmental Technology. 37:2072-2081 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2016.1141236 |
| Popis: | The anti-epileptic drug carbamazepine (CBZ) receives growing attention due to slow biodegradation and inherent accumulation in the aquatic environment. The application of a gas-phase pulsed corona discharge (PCD) was investigated to remove CBZ from synthetic solutions and spiked wastewater effluent from a municipal wastewater treatment facility. The treated water was showered between high voltage (HV) wires and grounded plate electrodes, to which ultra-short HV pulses were applied. CBZ was readily oxidized and 1-(2-benzaldehyde)-4-hydroquinazoline-2-one (BQM) and 1-(2-benzaldehyde)-4-hydro-quinazoline-2,4-dione (BQD) were identified as the most abundant primary transformation products, which, contrary to CBZ ozonation data available in the literature, were further easily oxidized with PCD: BQM and BQD attributed to only a minor portion of the target compound oxidized. In concentrations commonly found in wastewater treatment plant effluents (around 5 µg L−1), up to 97% reduction in CBZ concentration was achieved at mere 0.3 kW h m−3 energy consumption, and over 99.9% was removed at 1 kW h m−3. The PCD application proved to be efficient in the removal of both the parent substance and its known transformation products, even with the competing reactions in the complex composition of wastewater. |
| Databáze: | OpenAIRE |
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