Shear-induced hydrodynamic cavitation as a tool for pharmaceutical micropollutants removal from urban wastewater
| Autor: | Brane Širok, Martin Petkovšek, Boris Kompare, Tina Kosjek, Matevž Dular, Ester Heath, Mojca Zupanc, Marjeta Stražar |
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| Rok vydání: | 2014 |
| Předmět: |
Ketoprofen
Naproxen Time Factors Acoustics and Ultrasonics Hydraulic retention time 02 engineering and technology Wastewater 010501 environmental sciences 01 natural sciences Water Purification Inorganic Chemistry chemistry.chemical_compound medicine Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Cities Effluent Mechanical Phenomena 0105 earth and related environmental sciences Chromatography Chemistry Organic Chemistry Advanced oxidation process Temperature Clofibric acid Hydrogen Peroxide 021001 nanoscience & nanotechnology 6. Clean water Pharmaceutical Preparations 13. Climate action Cavitation Hydrodynamics 0210 nano-technology Water Pollutants Chemical medicine.drug |
| Zdroj: | Ultrasonics Sonochemistry |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2013.10.025 |
| Popis: | In this study, the removal of clofibric acid, ibuprofen, naproxen, ketoprofen, carbamazepine and diclofenac residues from wastewater, using a novel shear-induced cavitation generator has been systematically studied. The effects of temperature, cavitation time and H2O2 dose on removal efficiency were investigated. Optimisation (50°C; 15 min; 340 mg L(-1) of added H2O2) resulted in removal efficiencies of 47-86% in spiked deionised water samples. Treatment of actual wastewater effluents revealed that although matrix composition reduces removal efficiency, this effect can be compensated for by increasing H2O2 dose (3.4 g L(-1)) and prolonging cavitation time (30 min). Hydrodynamic cavitation has also been investigated as either a pre- or a post-treatment step to biological treatment. The results revealed a higher overall removal efficiency of recalcitrant diclofenac and carbamazepine, when hydrodynamic cavitation was used prior to as compared to post biological treatment i.e., 54% and 67% as compared to 39% and 56%, respectively. This is an important finding since diclofenac is considered as a priority substance to be included in the EU Water Framework Directive. |
| Databáze: | OpenAIRE |
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