Photodegradation of the surfactants na-dodecylbenzenesulfonate and dodecylpyridinium-chloride as affected by humic substances
| Autor: | Reinhold Hermann, Jörg Gerke, Wolfgang Ziechmann |
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| Rok vydání: | 1997 |
| Předmět: |
chemistry.chemical_classification
Reaction mechanism Environmental Engineering Chemistry Ecological Modeling Inorganic chemistry Biodegradation complex mixtures Pollution chemistry.chemical_compound Sulfonate Adsorption Environmental chemistry Pyridine Environmental Chemistry Humic acid Photodegradation Sludge Water Science and Technology |
| Zdroj: | Water, Air, and Soil Pollution. 98:43-55 |
| ISSN: | 1573-2932 0049-6979 |
| DOI: | 10.1007/bf02128649 |
| Popis: | Surfactants account for a great proportion of organic xenobiotica released into the environment by anthropogenic action. In natural waters and sewage sludge they can be removed from solution by different reactions, including adsorption to solid phases, biodegradation and abiotic photolytic degradation. In the present investigation we found that photodegradation of Na- dodecylbenzenesulfonate (LAS) was reduced by humic substances by a factor of 2 or more. In contrast, photodegradation of dodecylpyridinium-chloride (LPC) was increased in the presence of humic substances by a factor of 1.16–1.43. These differences were explained by the strong bonding of LPC but not of LAS to the humics. Photolytic degradation of LAS begins at the aliphatic side chains followed by aromatic ring cleavage. Photodegradation of LPC mainly associated with the humics showed similarity to that of pyridine. |
| Databáze: | OpenAIRE |
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