Removal and transformation of odorous aldehydes by UV/H2O2
| Autor: | Andrea M. Dietrich, Chang Hyun Jo |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Chromatography Chemistry Health Toxicology and Mutagenesis fungi Photodissociation Geosmin Aldehyde Transformation (genetics) chemistry.chemical_compound Odor Sensory tests parasitic diseases Organic chemistry Hydrogen peroxide Derivatization psychological phenomena and processes Water Science and Technology |
| Zdroj: | Journal of Water Supply: Research and Technology-Aqua. 58:580-586 |
| ISSN: | 1605-3974 0003-7214 |
| DOI: | 10.2166/aqua.2009.121 |
| Popis: | Removal of odorous aldehydes by UV/H 2 0 2 was compared to removal of geosmin and 2-MIB by the same process. Odour transformation was investigated by sensory test and by-products were monitored by a carbonyl derivatization method. Heptadienal, decadienal and nonadienal were removed faster than geosmin and 2-MIB. The primary mechanism was the direct UV photolysis in the UV/H 2 0 2 process. In sensory tests, new odours such as chalky or sweet odours were produced while the initial odour intensity of fishy/grassy-smelling aldehydes was reduced with increasing exposure time to UV/H 2 O 2 . New carbonyl compounds were detected from the UV photolysis of nonadienal and were not removed by further UV irradiation, which was thought to be related to production of new odours. Results indicate that new types of odour were produced from the oxidation of odorous aldehydes, and consequently, sensory tests coupled with chemical analysis should be considered in designing an oxidation process to control recalcitrant odorants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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