The use of ozone in the remediation of polycyclic aromatic hydrocarbon contaminated soil
| Autor: | Alan D. W. Dobson, Mark M. O'Mahony, Ian Singleton, Jeremy Barnes |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Environmental remediation Health Toxicology and Mutagenesis Polycyclic aromatic hydrocarbon complex mixtures chemistry.chemical_compound Ozone Bioremediation Waste Management Soil Pollutants Environmental Chemistry chemistry.chemical_classification biology Chemistry Public Health Environmental and Occupational Health General Medicine General Chemistry Phenanthrenes Biodegradation Phenanthrene biology.organism_classification Pollution Soil contamination Pseudomonas alcaligenes Biodegradation Environmental Environmental chemistry Soil water |
| Zdroj: | Chemosphere. 63:307-314 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2005.07.018 |
| Popis: | The potential of using ozone for the removal of phenanthrene from several different soils, both alone and in combination with biodegradation using a microbial inoculant (Pseudomonas alcaligenes PA-10), was examined. The greater the water content of the soil the less effective the ozone treatment, with air-dried soils showing the greatest removal of phenanthrene; while soils with higher levels of clay also reduced the effectiveness of the ozone treatments. However, at least a 50% reduction in phenanthrene levels was achieved in air-dried soil after an ozone treatment of 6 h at 20 ppm, with up to 85% removal of phenanthrene achieved in sandy soils. The biodegradation results indicate that P. alcaligenes PA-10 may be useful as an inoculant for the removal of PAHs from contaminated soils. Under the conditions used in our experiments, however, pre-ozonation did not enhance subsequent biodegradation of phenanthrene in the soils. Similar levels of phenanthrene removal occurred in both non-ozonated and ozonated Cruden Bay soil inoculated with P. alcaligenes PA-10. However, the biodegradation of phenanthrene in ozonated Boyndie soil was much slower. This may be due to the release of toxic products in this soil during ozonation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect