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    Title: Accumulation and elimination kinetics of herbicides butachlor, thiobencarb and chlomethoxyfen by Aristichthys nobilis
    Authors: Lin,Kuo-Hsiung;Yen,Jui-Hung;Wang,Yei-Shung
    Contributors: 輔英科技大學 環境工程與科學系
    Keywords: accumulation;elimination;butachlor;thiobencarb;chlomethoxyfen;Aristichthys nobilis
    Date: 1997-02-01
    Issue Date: 2010-10-15 14:01:13 (UTC+8)
    Abstract: Bioconcentration kinetics of three major paddy-field herbicides, butachlor, thiobencarb and chlomethoxyfen were investigated by accumulation and elimination measurements in laboratory experiments with black silver carp (Aristichthys nobilis). The biological half-lives of the three herbicides on exposure at high and low concentrations were 11�6 and 23�1 days for butachlor, 13�9 and 17�3 days for thiobencarb and 5�6 and 4�5 h for chlomethoxyfen, respectively. One- and two-compartment models were used to elucidate the bioconcentration kinetics. Data from a short-term, 14-day expiry experiment were used to estimate the parameters in the models by non-linear regression analysis, and the bioconcentration factors (BCF) in the steady state were calculated from those parameters. The BCF in the steady state have the descending order thiobencarb > chlomethoxyfen > butachlor at high concentration, and butachlor > thiobencarb > chlomethoxyfen at low concentration. One-compartment model for butachlor and thiobencarb and a two-compartment model for chlomethoxyfen are useful to predict the BCF on prolonged exposure and, further, to assess the influence of these pollutants.
    Relation: Pesticide Science,Volume 49, Issue 2, pages 178–184
    Appears in Collections:[Department of Environmental Engineering and Science] Journal Article

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