QUANTIFICATION AND MODELLING OF 2,4-DINITROTOLUENE REDUCTION WITH HIGH-PURITY AND CAST IRON

Cast iron has been used as a reactive material in permeable reactive barriers for site remediation. A recent study (by Oh et al. ) showed that graphite inclusions in cast iron can also serve as reaction sites for 2,4-dinitrotoluene (DNT). These study also found that graphite-mediated reduction of DNT has a regioselectivity that is different from that for iron surface. In this study, they quantified the observations reported by Oh et al. and examined the role of graphite in cast iron through numerical modelling. Models containing one and two reaction sites were developed to evaluate the mass transfer, sorption and reaction rates for DNT reduction in batch systems containing high-purity and cast iron.