The application of all overlayer technique in evaluation of Pyrene-contaminated sites

Pyrene-contaminated sites of Xiamen western sea sediments are evaluated by using overlayer technique．The resuits show that the samples collected from the sediments with a high concentration of Pyrene contain 47 thousand Pyrene-degrading bacteria per gram while the samples collected from the sediments with a low concentration of Pyrene contain 12 thousand Pyrene degrading bacteria per gram．The number of Pyrene-degrading bacteria is positively related with the concentration of Pyrene．