TWO STEP OXIDATION OF 2,4,6-TRINITRORESORCINE (TNR) USING ZERO-VALENT IRON (ZVI) AND ITS APPLICATION IN REMOVAL OF TNR FROM GROUNDWATER

This paper describes the character of the reduction of TNR by ZVI in anaerobic conditions and the oxidative reaction of amine resorcine in the system of ZVI-EDTA-O2. The products of TNR by ZVI in anaerobic conditions were amine resorcine compounds. These compounds tend to be easier to oxidize by the generated in the system of ZVI-EDTA-O2. HPLC and Chemical Oxygen Demand analysis (COD) were used to monitor the efficiency of reactions. The experiments have suggested that the removal of TNR from groundwater should be implemented by a two step process. The first step is reduction of TNR by ZVI to form amine resorcine. The second step is oxidation of amine resorcine in a system consisting of ZVI-EDTA-O2. From the obtained results, a model for TNR contaminated groundwater treatment has been suggested and tested.