title: Mineralization of diuron [3-(3,4-dichlorophenyl)-1, 1-dimethylurea] by co-immobilized Arthrobacter sp. and Delftia acidovorans.
abstract: 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).
authors.affiliation: Equipe Dépollution Biologique des Sols, Université de Haute Alsace, 33, rue de Herrlisheim, 50568, 68008, Colmar Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Bazot
authors.forename: P
authors.initials: P
authors.lastname: Bois
authors.forename: C
authors.initials: C
authors.lastname: Joyeux
authors.forename: T
authors.initials: T
authors.lastname: Lebeau
mesh_terms: 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*
chemical_list: D000814:Aniline Compounds; C014464:3,4-dichloroaniline; D004237:Diuron