出版社：Korean Society of Environmental Health and Toxicology
摘要：Aim of the present study was the development of a bioassay which enables the detection of toxic efcts of heavy metal ions to a bacterium,Escherichia coli. Inhibition efects of the metals on growth rates of the bac- terium were studied in the absence or presence of fulvic acid. This method does not clearly differentiate among metals,but does detect overall AGB inhibition rate (toxicity) for 5 different heavy metals. The toxicity of the melals in the absence of fulvic acid in the same testing conditions was significantly increased in following order;Hg< Pb,Zn< Cd < Cu,whereas the inhibition rate (loxicity) in the presence of FA was shown to be increased in following order: Cd< Pb,Hg< Cu < Zn. The results of the present study indicate that this simple and fast biomonitoring assay with direct exposure of E coli. might be a valuable supplement to analytical meth- ods of contaminated media.
