当前位置： SCI文献检索 > ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY期刊下所有文献 > Residue-based interpretation of toxicity and bioconcentration QSARs from aquatic bioassays: polar narcotic organics.

Residue-based interpretation of toxicity and bioconcentration QSARs from aquatic bioassays: polar narcotic organics.

Abstract：

:Bioconcentration and toxicity estimation for a group of substituted phenols often categorized as "polar narcotics" can be confounded by pH-dependent ionization. Two methods of correction for ionization were applied to toxicity data obtained by U.S. EPA-Duluth for fathead minnows exposed to 30 different phenols in 37 bioassays. Toxicity QSARs with corrected data were substantially different from those obtained with raw toxicity data. When ionization-corrected toxicity data were used in the critical body residue (CBR) estimation process previously successful with neutral narcotic organics, several categories of CBR, apparently related to different modes of toxic action, resulted. Published data on lethal CBR for substituted phenols were in general agreement, although such information is limited. Elimination half-life rate constants, estimated from nonlinear curve fitting to time-toxicity information, were relatively constant for the Duluth bioassay data, averaging 0.3 days. Half-life information for small aquatic organisms, both from toxicity- and bioconcentration-based tests in the literature, was in a similar range. Much of the relatively high variability encountered experimental data for substituted phenols may in large part be due to differences in metabolic degradation between chemicals and species.

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

McCarty LS,Mackay D,Smith AD,Ozburn GW,Dixon DG

doi

10.1006/eesa.1993.1024

subject

Has Abstract

pub_date

1993-06-01 00:00:00

pages

253-70

issue

3

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(83)71024-9

journal_volume

25

pub_type

杂志文章

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