Mobility of the Organochlorine Compound Dicofol in Soil Promoted by Pseudomonas fluorescens

Persistence and Bioaccumulation of Persistent Organic Pollutants (POPs)

“…Only 7% of the bacteria poured onto the soil remained within the first 1 cm of soil. In this experiment the acaricide dicofol moved away from the bacteria toward the soil particles [10] showing that it was more strongly attracted to the soil matrix than to the living cells. Therefore in this case the soil acted as a filter/sponge, protecting microorganisms, mesofauna, plant roots and prevent-ing ground water pollution.…”

“…Soil microorganisms represent a large part of the living biomass but in general are not used for bioaccumulation studies since they cannot be separated from the soil to measure the pollutants. Nevertheless important information could be obtained from an experiment in which antibiotic resistant bacteria with bioaccumulated difocol were introduced into the soil [10]. Radioactive 14 C-dicofol was bioaccumulated during the incubation of Pseudomonas fluorescens (soil bacteria) resistant to kanamicyn and rifampycin.…”