Quantitative Determination of Fluorochemicals in Municipal Landfill Leachates
| Autor: | Douglas F. Barofsky, Carin A. Huset, Morton A. Barlaz, Jennifer A. Field |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Environmental Engineering
Sorbent Health Toxicology and Mutagenesis Tandem mass spectrometry Article Tandem Mass Spectrometry Water Pollution Chemical Environmental Chemistry Solid phase extraction Leachate Caprylates Fluorotelomer chemistry.chemical_classification Fluorocarbons Chromatography Chemistry Extraction (chemistry) Solid Phase Extraction Public Health Environmental and Occupational Health General Medicine General Chemistry Pollution Sulfonamide Refuse Disposal Alkanesulfonic Acids Environmental chemistry Water Pollutants Chemical Chromatography Liquid Environmental Monitoring |
| Popis: | Twenty-four fluorochemicals were quantified in landfill leachates recovered from municipal refuse using an analytical method based on solid-phase extraction, dispersive-carbon sorbent cleanup, and liquid chromatography/tandem mass spectrometry. The method was applied to six landfill leachates from four locations in the US as well as to a leachate generated by a laboratory bioreactor containing residential refuse. All seven leachates had the common characteristic that short-chain (C(4)-C(7)) carboxylates or sulfonates were greater in abundance than their respective longer-chain homologs (≥ C(8)). Perfluoroalkyl carboxylates were the most abundant (67 ± 4% on a nanomolar (nM) basis) fluorochemicals measured in leachates; concentrations of individual carboxylates reaching levels up to 2800 ng L(-1). Perfluoroalkyl sulfonates were the next most abundant class (22 ± 2%) on a nM basis; their abundances in each of the seven leachates derived from municipal refuse were greater for the shorter-chain homologs (C(4) and C(6)) compared to longer-chain homologs (C(8) and C(10)). Perfluorobutane sulfonate concentrations were as high as 2300 ng L(-1). Sulfonamide derivatives composed 8 ± 2.1% (nM basis) of the fluorochemicals in landfill leachates with methyl (C(4) and C(8)) and ethyl (C(8)) sulfonamide acetic acids being the most abundant. Fluorotelomer sulfonates (6:2 and 8:2) composed 2.4 ± 1.3% (nM basis) of the fluorochemicals detected and were present in all leachates. |
| Databáze: | OpenAIRE |
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