The reduction mechanism of molybdenum-methyl thymol blue (MTB)-chlorate system has been investigated in water on a mercury electrode. As this system is very sensitive for ultratrace determination of molybdenum, the actual mechanism involved was studied. Electrochemical techniques, including dc tast polarography and cyclic voltammetry were employed. It is shown that, the cathodic wave of mol...

A novel dissimilatory perchlorate-reducing bacterium (DPRB), Arcobacter sp. strain CAB, was isolated from a marina in Berkeley, CA. Phylogenetically, this halophile was most closely related to Arcobacter defluvii strain SW30-2 and Arcobacter ellisii. With acetate as the electron donor, strain CAB completely reduced perchlorate (ClO4(-)) or chlorate (ClO3(-)) [collectively designated (per)chlora...

Introduction: The identification of perchlorate (ClO4) on Mars [1,2] has led to the possibility that complete redox couples are available for microbial metabolism in contemporary surface environments [3]. Perchlorate-reducing bacteria (PRB) utilize ClO4 and chlorate (ClO3) as terminal electron acceptors due to the high reduction potential [3]. Additionally, ClO4 salts have been suggested as a p...

As a continuation of our studies devoted to the vibrational and bond properties of molecules and ions containing interhalogen or halogen-oxygen bonds we have now performed an analysis of the bond characteristics of chlorine trifluoride oxide (chlorosyl trifluoride, F3ClO), through a calculation of its mean amplitudes of vibration from spectroscopic data. The interesting F3ClO molecule has been ...

Perchlorate (ClO4 ) has been detected in numerous ground and surface waters, and has recently been added to the drinking water Candidate Contaminant List in the United States. Perchlorate can be removed from drinking water using ion exchange, but this results in the production of highly saline (7–12%) perchlorate-contaminated brines. Perchlorate-degrading microbial enrichments capable of growth...

Groundwater at the Crafton-Redlands site in Redlands, California is contaminated with perchlorate in addition to chlorinated volatile organic compounds (VOCs). VOCs are removed from extracted groundwater using granular activated carbon, which is ineffective for perchlorate removal. Side-by-side pilot-scale bioreactors for perchlorate removal from extracted groundwater were tested at the site. P...