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Application of a Σpolycyclic aromatic hydrocarbon model and a logistic regression model to sediment toxicity data based on a species‐specific, water‐only LC50 toxic unit for Hyalella azteca by Jong‐Hyeon Lee; Peter F. Landrum; L. Jay Field; Chul‐Hwan Koh is a Environmental Science article available to read on EtoBox.

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## Abstract Two models, a Σpolycyclic aromatic hydrocarbon (PAH) model based on equilibrium partitioning theory and a logistic‐regression model, were developed and evaluated to predict sediment‐associated PAH toxicity to __Hyalella azteca.__ A ΣPAH model was applied to freshwater sediments. This study is the first attempt to use a ΣPAH model based on water‐only, median lethal concentration (LC50) toxic unit (TU) values for sediment‐associated PAH mixtures and its application to freshwater sediments. To predict the toxicity (i.e., mortality) from contaminated sediments to __H. azteca__, an interstitial water TU, calculated as the ambient interstitial water concentration divided by the water‐only LC50 in which the interstitial water concentrations were predicted by equilibrium partitioning theory, was used. Assuming additive toxicity for PAH, the sum of TUs was calculated to predict the total toxicity of PAH mixtures in sediments. The ΣPAH model was developed from 10‐ and 14‐d __H. azteca__ water‐only LC50 values. To obtain estimates of LC50 values for a wide range of PAHs, a quantitative structure‐activity relationship (QSAR) model (log LC50 – log __K__~ow~) with a constant slope wa

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Author

Jong‐Hyeon Lee; Peter F. Landrum; L. Jay Field; Chul‐Hwan Koh

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley; Research Square (ISSN 0730-7268)

Published

2001

Language

EN

Field

Environmental Science (Physical Sciences)