Composition and structure of agents responsible for development of water repellency in soils following oil contamination
| Autor: | Marina Litvina, Cooper H. Langford, Tiona R. Todoruk |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Magnetic Resonance Spectroscopy Environmental remediation Environmental engineering Environmental pollution General Chemistry Contamination Soil contamination chemistry.chemical_compound Hydrocarbon Petroleum chemistry Solubility Environmental chemistry Soil water Spectroscopy Fourier Transform Infrared Environmental Chemistry Soil Pollutants Organic matter Environmental Pollution |
| Zdroj: | Environmental sciencetechnology. 37(13) |
| ISSN: | 0013-936X |
| Popis: | Soil from the Ellerslie site of experimental oil contamination in Alberta developed water repellency some years after initial remediation. The water-repellent soils were compared to clean soils and contaminated but wettable soils by solid-state nuclear magnetic resonance (NMR). The effects of extraction with CH2Cl2 (for petroleum hydrocarbons), NaOH (for natural organic matter), and 2-propanol/ammonia (IPA/NH3) on wettability were evaluated by the molarity of the ethanol droplet (MED) test. Soil extracts and whole soils, after extraction, were examined using NMR and Fourier transform infrared spectroscopy (FTIR). On the basis of the structure--MED correlations, a model of a thin-layer natural organic matter--petroleum products complex formed under strong drying conditions is proposed to account for the development of water repellency. Studies of two similar soils from accidental oil spills are supportive. |
| Databáze: | OpenAIRE |
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