Water treatment method involves contacting water containing a dissolved contaminant or unwanted reducible species or a recoverable species and metal porphyrin as a reductive catalyst in the presence of an electron donor in a reactor under conditions to reduce the reducible species. The reduction of the contaminant or unwanted or recoverable species can be catalyzed by light or electrical activation of the metal porphyrin.
CONTRACTUAL ORIGIN OF THE INVENTION
 This invention was supported in part by funding from the Federal Government through the Consortium for Environmental Education and Technology Development in cooperation with the Department of Energy. The Government may have certain rights in the invention.