Mineralization of diuron [3-(3,4-dichlorophenyl)-1, 1-dimethylurea] by co-immobilized Arthrobacter sp. and Delftia acidovorans.
Mineralization of diuron has not been previously demonstrated despite the availability of some bacteria to degrade diuron into 3,4-dichloroaniline (3,4-DCA) and others that can mineralize 3,4-DCA. A bacterial co-culture of Arthrobacter sp. N4 and Delftia acidovorans W34, which respectively degraded diuron (20 mg l(-1)) to 3,4-DCA and mineralized 3,4-DCA, were able to mineralize diuron. Total diuron mineralization (20 mg l(-1)) was achieved with free cells in co-culture. When the bacteria were immobilized (either one bacteria or both), the degradation rate was higher. Best results were obtained with free Arthrobacter sp. N4 cells co-cultivated with immobilized cells of D. acidovorans W34 (mineralization of diuron in 96 h, i.e., 0.21 mg l(-1 )h(-1) vs. 0.06 mg l(-1 )h(-1) with free cells in co-culture).
Bazot
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Equipe Dépollution Biologique des Sols, Université de Haute Alsace, 33, rue de Herrlisheim, 50568, 68008, Colmar Cedex, France.
Bois
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Joyeux
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Lebeau
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T
D000814:Aniline Compounds / Q000378:metabolism; D001173:Arthrobacter / Q000166:cytology / Q000378:metabolism*; D001673:Biodegradation, Environmental; D049109:Cell Proliferation; D018914:Cells, Immobilized; D018920:Coculture Techniques; D020605:Delftia acidovorans / Q000166:cytology / Q000378:metabolism*; D004237:Diuron / Q000378:metabolism*
D000814:Aniline Compounds; C014464:3,4-dichloroaniline; D004237:Diuron