Comparison of various advanced oxidation processes for the degradation of phenylurea herbicides
| Autor: | János Farkas, Gábor Veréb, Krisztina J. Kovács, Tünde Alapi, Klara Hernadi, Krisztina Schrantz, Gergő Simon, Eszter Arany, András Dombi |
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| Rok vydání: | 2016 |
| Předmět: |
Ozone
Ultraviolet Rays chemistry.chemical_element Portable water purification 02 engineering and technology 010501 environmental sciences Photochemistry 01 natural sciences Water Purification chemistry.chemical_compound polycyclic compounds Chlorine 0105 earth and related environmental sciences Methylurea Compounds Photolysis Phenylurea Compounds Herbicides Chemistry General Medicine Mineralization (soil science) 021001 nanoscience & nanotechnology Pollution Decomposition Diuron Environmental chemistry Photocatalysis Degradation (geology) 0210 nano-technology Oxidation-Reduction Water Pollutants Chemical Food Science |
| Zdroj: | Journal of Environmental Science and Health, Part B. 51:205-214 |
| ISSN: | 1532-4109 0360-1234 |
| DOI: | 10.1080/03601234.2015.1120597 |
| Popis: | Various types of advanced oxidation processes (AOPs), such as UV photolysis, ozonation, heterogeneous photocatalysis and their combinations were comparatively examined at the same energy input in a home-made reactor. The oxidative transformations of the phenylurea herbicides fenuron, monuron and diuron were investigated. The initial rates of transformation demonstrated that UV photolysis was highly efficient in the cases of diuron and monuron. Ozonation proved to be much more effective in the transformation of fenuron than in those of the chlorine containing monuron and diuron. In heterogeneous photocatalysis, the rate of decomposition decreased with increase of the number of chlorine atoms in the target molecule. Addition of ozone to UV-irradiated solutions and/or TiO2-containing suspensions markedly increased the initial rates of degradation. Dehalogenation of monuron and diuron showed that each of these procedures is suitable for the simultaneous removal of chlorinated pesticides and their chlorinated intermediates. Heterogeneous photocatalysis was found to be effective in the mineralization. |
| Databáze: | OpenAIRE |
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