Examination on Utilization of Regenerated Amorphous Iron Oxide for Reduction Catalyst of Nitrate Nitrogen

Abstract

In this study, we examined the utilization of amorphous iron oxide for reduction catalyst of nitrate nitrogen in underground water economically and in large quantities. The results indicated that nitrate nitrogen could be reduced to ammonium nitrogen through nitrite nitrogen by addition with iron powder for reducer, and that the reaction velocity was changed widely by the proportion of addition with iron powder and iron oxide.
An addtion with acid had an effect of prevention from the decline of reaction by forming of iron (II) hydroxide on the surface of iron powder, and minute iron powder was effective for rise of reaction velocity.
These observations indicate that this catalyst is useful for removal of nitrate nitrogen in underground water by combination with existing removal methods of ammonium nitrate.