K. Hundt et al., EFFECT OF SELECTED ENVIRONMENTAL-FACTORS ON DEGRADATION AND MINERALIZATION OF BIARYL COMPOUNDS BY THE BACTERIUM RALSTONIA-PICKETII IN SOIL AND COMPOST, Chemosphere, 36(10), 1998, pp. 2321-2335
By varying selected environmental factors, the degradation and mineral
ization of biaryl compounds by the bacterium Ralstonia pickettii in so
il and compost were investigated. An optimized soil moisture and enhan
ced bioavailability by using the nonionic surfactant Tween 80 were of
great importance for the degradation rates of biaryl compounds like bi
phenyl and 4-chlorobiphenyl by cells of Ralstonia picketti SBUG 290 in
oculated into soil. Additionally, degradation of these compounds by th
e investigated strain in soil was strongly dependent upon the medium o
f precultivation. Also the influence of temperature and soil pH-value
was tested. In contrast to the used soil, the autochthonous flora of t
he compost seemed to have a higher physiological activity. All investi
gated compounds (biphenyl, 4-chlorobiphenyl and dibenzofuran) were deg
raded quickly in compost. Inoculation with the investigated bacterium
did not enhance the degradation rates significantly. (C) 1998 Elsevier
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