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首页> 外文期刊>Environmental Science & Technology: ES&T >Predicting Bioavailability of Sediment Polycyclic Aromatic Hydrocarbons to Hyalella azteca using Equilibrium Partitioning,Supercritical Fluid Extraction,and Pore Water Concentrations
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Predicting Bioavailability of Sediment Polycyclic Aromatic Hydrocarbons to Hyalella azteca using Equilibrium Partitioning,Supercritical Fluid Extraction,and Pore Water Concentrations

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摘要

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(PAH_(34))were used to predict 28 day survival 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 mu g/g,while sediments as low as 2.4 mu g/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 mu mol/g of lipid,consistent with 32 mu mol/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.

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  • 来源
    《Environmental Science & Technology: ES&T》 |2007年第17期|6297-6304|共8页
  • 作者

    STEVEN B.HAWTHORNE; NICHOLAS A.AZZOLINA; EDWARD F.NEUHAUSER;

  • 作者单位

    Energy and Environmental Research Center,University of North Dakota,Grand Forks,North Dakota 58201,The RETEC Group,Incorporated,1001 West Seneca Street, Suite 204,Ithaca,New York 14850,and National Grid, 300 Erie Boulevard West,Syracuse,New York 1320;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类 环境化学;
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