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Applied and Environmental Microbiology, August 2003, p. 4997-5000, Vol. 69, No. 8
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.8.4997-5000.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Microbial Isotopic Fractionation of Perchlorate Chlorine

Max L. Coleman,1* Magali Ader,1,2 Swades Chaudhuri,3 and John D. Coates4

Postgraduate Research Institute for Sedimentology, The University of Reading, Reading, United Kingdom,1 Institut de Physique du Globe, Paris, France,2 Department of Microbiology, University of Massachusetts, Amherst, Massachusetts,3 Department of Plant and Microbial Biology, University of California, Berkeley, California4

Received 19 February 2003/ Accepted 2 June 2003

Perchlorate contamination can be microbially respired to innocuous chloride and thus can be treated effectively. However, monitoring a bioremediative strategy is often difficult due to the complexities of environmental samples. Here we demonstrate that microbial respiration of perchlorate results in a significant fractionation (~-15{per thousand}) of the chlorine stable isotope composition of perchlorate. This can be used to quantify the extent of biotic degradation and to separate biotic from abiotic attenuation of this contaminant.

* Corresponding author. Mailing address: Postgraduate Research Institute for Sedimentology, The University of Reading, Reading, United Kingdom. Phone: 44 118 378 6627. Fax: 44 118 931 0279. E-mail: m.l.coleman{at}reading.ac.uk.

Applied and Environmental Microbiology, August 2003, p. 4997-5000, Vol. 69, No. 8
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.8.4997-5000.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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