Polar metabolites of polycyclic aromatic compounds from fungi are potential soil and groundwater contaminants
| Autor: | Esther S. Boll, Anders R. Johnsen, Jan H. Christensen |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
endocrine system diseases Health Toxicology and Mutagenesis Carboxylic acid education Soil chemistry.chemical_compound health services administration Soil Pollutants Environmental Chemistry Organic chemistry Polycyclic Aromatic Hydrocarbons Sulfate Groundwater Cunninghamella chemistry.chemical_classification Cunninghamella elegans biology Public Health Environmental and Occupational Health food and beverages Sorption General Medicine General Chemistry Phenanthrene biology.organism_classification Pollution humanities chemistry Dibenzothiophene Pyrene Adsorption Water Pollutants Chemical Methyl group |
| Zdroj: | Chemosphere. 119:250-257 |
| ISSN: | 0045-6535 |
| Popis: | This study investigated the sorption to soil of water-soluble metabolites from polycyclic aromatic compounds (PACs). The soil fungus Cunninghamella elegans was used to produce PAC metabolites from two un-substituted PACs (phenanthrene, pyrene), three alkyl-substituted PACs (2-methylnaphthalene, 1-methylphenanthrene, 1-methylpyrene), and one sulfur-containing heterocyclic PAC (dibenzothiophene). Fifty-eight metabolites were tentatively identified; metabolites from the un-substituted PACs were hydroxylated and sulfate conjugated, whereas metabolites from alkyl-substituted PACs were sulfate conjugated and either hydroxylated or oxidized to carboxylic acids at the methyl group. The metabolism of the sulfur-containing heterocyclic PAC resulted in sulfate conjugates. The sorption of the PAC metabolites to three soils was determined using a batch equilibrium method, and partition coefficients ( K d ’s) were calculated for fourteen representative metabolites. Sulfate conjugated metabolites displayed K d ’s below 70 whereas the metabolites with both a sulfate and a carboxylic acid group had K d ’s below 2.8. The low K d ’s of water-soluble PAC metabolites indicate high mobility in soil and a potential for leaching to surface- and groundwaters. |
| Databáze: | OpenAIRE |
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