Kinetics of RDX degradation by zero-valent iron (ZVI).
Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) is a common groundwater contaminant at military facilities. The current research has been conducted to evaluate the use of zero-valent iron (ZVI) for the remediation of water contaminated with RDX. RDX was found to degrade rapidly in the presence of ZVI. The observed first-order kinetic constant for RDX reduction follows an enzymatic-like kinetic model with respect to the ZVI concentration. At low ZVI concentrations, RDX reduction follows pseudo first order kinetics with respect to ZVI concentration; while at high ZVI concentrations the RDX reduction is zero-order. Nitroso compounds (MNX, DNX, and TNX), nitrate, nitrite and nitrous oxide were identified as the main by-products for the RDX reduction by ZVI. The nitroso compounds were found to undergo reduction by ZVI.
Wanaratna
Pischa
P
Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA.
Christodoulatos
Christos
C
Sidhoum
Mohammed
M
D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D009566:Nitrates / Q000737:chemistry; D009573:Nitrites / Q000737:chemistry; D010084:Oxidation-Reduction; D014227:Triazines / Q000737:chemistry*
D009566:Nitrates; D009573:Nitrites; D014227:Triazines; D007501:Iron; C009160:cyclonite