Predicting Bioavailability of Sediment Polycyclic Aromatic Hydrocarbons to Hyalella azteca using Equilibrium Partitioning, Supercritical Fluid Extraction, and Pore Water Concentrations
| العنوان: | Predicting Bioavailability of Sediment Polycyclic Aromatic Hydrocarbons to Hyalella azteca using Equilibrium Partitioning, Supercritical Fluid Extraction, and Pore Water Concentrations |
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| المؤلفون: | Joseph P. Kreitinger, Nicholas A. Azzolina, Steven B. Hawthorne, Edward F. Neuhauser |
| المصدر: | Environmental Science & Technology. 41:6297-6304 |
| بيانات النشر: | American Chemical Society (ACS), 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Geologic Sediments, Biological Availability, Polycyclic aromatic hydrocarbon, Models, Biological, Lethal Dose 50, Pore water pressure, Predictive Value of Tests, Animals, Environmental Chemistry, Amphipoda, Mortality, Polycyclic Aromatic Hydrocarbons, chemistry.chemical_classification, Fluorenes, Persistent organic pollutant, Chromatography, biology, Chemistry, Hyalella azteca, Supercritical fluid extraction, Water, Sediment, General Chemistry, biology.organism_classification, Lipids, Bioavailability, Hydrocarbon, Environmental chemistry, Water Pollutants, Chemical, Environmental Monitoring |
| الوصف: | Polycyclic aromatic hydrocarbon (PAH) bioavailability to Hyalella azteca was determined in 97 sediments from six former manufactured-gas plants and two aluminum smelter sites. Measurements of Soxhlet extractable, rapidly released based on mild supercritical fluid extraction, and pore water dissolved concentrations of 18 parent and 16 groups of alkyl PAHs (PAH34) were used to predict 28 daysurvival based on equilibrium partitioning and hydrocarbon narcosis models. Total PAH concentrations had little relationship to toxicity. Amphipods survived in sediments with PAH34 concentrations as high as 2990 microg/g, while sediments as low as 2.4 microg/g of PAH34 resulted in significant mortality. Equilibrium partitioning using either total extractable or rapidly released concentrations significantly improved predictions. However, pore water PAH34 concentrations were best for predicting amphipod survival and correctly classified toxic and nontoxic sediment samples with an overall model efficiency of 90%. Alkyl PAHs accounted for 80% of the toxicity, demonstrating that careful measurement of the 16 alkyl clusters in pore water is required. Regression analysis of the pore water PAH34 data from 97 field sediments against amphipod survival resulted in a mean 50% lethal residue value of 33 micromol/g of lipid, consistent with 32 micromol/g of lipid for fluoranthene determined by others in controlled laboratory conditions, thus demonstrating the applicability of EPA's hydrocarbon narcosis model when using pore water PAH34 concentrations. |
| تدمد: | 1520-5851 0013-936X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a78cbe7e045445691efcaf629fd94c14Test https://doi.org/10.1021/es0702162Test |
| رقم الانضمام: | edsair.doi.dedup.....a78cbe7e045445691efcaf629fd94c14 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15205851 0013936X |
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