2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Extremely active Pd/Magnetite Nano-Catalysts for Water Treatment

H. Hildebrand, K. Mackenzie and F-D Kopinke
Helmholtz Centre for Environmental Research - UFZ, DE

Keywords:
palladium, hydrodehalogenation, nano-catalyst

Abstract:
Halogenated organic compounds (HOCs) are among the most widely distributed water pollutants. The present paper aims at a treatment solution designed for special industrial wastewater contaminated with only small amounts of halogenated hydrocarbons – amounts which are big enough to make a discharge into municipal sewage works impossible. Our research follows the idea to detoxify the water by a selective destruction of the HOCs by reductive hydrodehalogenation reactions on palladium-containing nano-catalysts. Detoxification means that persistent HOCs are converted to organic molecules which can easily be removed by biodegradation in a wastewater treatment plant. Novel Pd/Fe3O4 nano-catalysts could be synthesized and successfully tested in hydrodechlorination reactions under laboratory conditions. Extremely high catalytic activities (> 3000 L/(g(Pd)min) could be observed in batch experiments with monochlorobenzene and even higher activities for trichloroethylene as probe substances. There is no comparable catalytic system mentioned in the present scientific literature.

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