[Adsorption of phenylurea derivative and chlorine-substituted aniline herbicides by microorganisms]

Adsorption of phenylurea derivatives and chlorosubstituted anilines by Pseudomonas and Aspergillus was studied. All these substances were adsorbed by the microorganisms in large quantities. The bacteria adsorbed more of these substances per biomass unit than the fungi. Adsorption of herbicides by the microorganisms is a physical process and is characterized by the same correlation as adsorption of herbicides by soil. Derivatives of phenylurea and chlorosubstituted anilines are easily washed from the cells with water. Conditions under which the substances were completely desorbed have been studied. Acetylation of 3,4-dichloroaniline by Pseudomonas aurantiaca results in desorption of 3,4-dichloroaniline from the cells of Pseudomonas boreopolis.