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Applied and Environmental Microbiology, October 1998, p. 3759-3764, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Toxic Effects of Modified Fenton Reactions on Xanthobacter flavus FB71dagger

Fatïh Büyüksönmez,1 Thomas F. Hess,1,* Ronald L. Crawford,1 and Richard J. Watts2

Center for Hazardous Waste Remediation Research, University of Idaho, Moscow, Idaho 83844,1 and Department of Civil and Environmental Engineering, Washington State University, Pullman, Washington 991642

Received 9 March 1998/Accepted 21 July 1998

The toxic effects of modified Fenton reactions on Xanthobacter flavus FB71, measured as microbial survival rates, were determined as part of an investigation of simultaneous abiotic and biotic oxidations of xenobiotic chemicals. A central composite, rotatable experimental design was developed to study the survival rates of X. flavus under various concentrations of hydrogen peroxide and iron(II) and at different initial cell populations. A model based on the experimental results, relating microorganism survival to the variables of peroxide, iron, and cellular concentrations was formulated and fit the data reasonably well, with a coefficient of determination of 0.76. The results of this study indicate that the use of simultaneous abiotic and biotic processes for the treatment of xenobiotic compounds may be possible.

* Corresponding author. Mailing address: Center for Hazardous Waste Remediation Research, University of Idaho, Moscow, ID 83844-0904. Phone: (208) 885-7461. Fax: (208) 885-7908. E-mail: tfhess{at}uidaho.edu.

dagger Publication 98303 of the Idaho Agricultural Experiment Station.

Applied and Environmental Microbiology, October 1998, p. 3759-3764, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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