I&EC 167 |
| Nanoscale zero-valent iron (nZVI) represents a highly promising emerging technology for the remediation of a wide variety of contaminants in soils and groundwater including chlorinated solvents, pesticides, polychlorinated biphenyls, nitroaromatics, and other redox-amenable species. In this study, high concentrations (~1mM) of lindane, gamma-hexachlorocyclohexane, were degraded by 10-50 g/L nZVI in 95% ethanol to evaluate the different degradation-related intermediates and products and to estimate the reductive capacity of the nZVI. The principal intermediate observed was gamma-3,4,5,6-Tetrachlorocyclohexene (gamma-TeCCH). Appreciable concentrations of a novel product, biphenyl, were also detected after long periods of exposure to nZVI. Trace products such as benzene were also detected. The degradation pathways linking these species to the parent compound will be presented as well as quantitative estimates of the capacity of the nZVI for contaminant degradation. |
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Nanotechnology and the Environment
1:30 PM-4:10 PM, Wednesday, 16 March 2005 Hyatt Regency -- Del Mar A, Oral
Division of Industrial and Engineering Chemistry |