Abstract
Microbial chlorate (ClO3 −) and perchlorate (ClO4 −) reduction has recently been recognized as an important form of microbial metabolism for the removal of chlorine oxyanion contamination in the environment.1 Chlorine oxyanions have many industrial applications including use as bleaching agents by the paper and pulp industry,2,3 as disinfectants and defoliants by the agricultural industry,4 and as components of explosives and rocket propellants by the aerospace and defense industries.5 Chlorates can also be formed as a result of ozonation of drinking waters which have been treated with chlorine6 or photodecomposition of chlorite or chlorine dioxide7 which are used in addition to chlorine for water disinfection.
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