Chemistry, waste form development, and properties of the Nitrate to Ammonia and Ceramic (NAC) process

摘要

A process for the conversion of alkaline, aqueous nitrate wastes to ammonia gas at low temperature, based upon the use of the active metal reductant aluminum, has been developed at the Oak Ridge National Laboratory (ORNL). The process is also well suited for the removal of low-level waste (LLW) radioelements and hazardous metals which report to the solid, alumina-based by-product. The chemistry of the interaction of aluminum powders with nitrate, and other waste stream metals is presented.