Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effectiveness of Zerovalent Iron and Nickel Catalysts for Degrading Chlorinated Solvents and n‐Nitrosodimethylamine in Natural Groundwater
Laboratory batch experiments were performed to evaluate the effectiveness of nickel catalysts, nanoscale zerovalent iron (nZVI) doped with palladium, and microscale ZVI for treatment of tetrachloroethene, trichloroethene, and n‐nitrosodimethylamine (NDMA) in soil‐groundwater slurries. Results indicated that the presence of NDMA inhibited degradation of chlorinated solvents. Although both the nickel catalyst and nZVI were able to degrade NDMA in deionized water, neither of these metals was effective at degrading NDMA in the soil–groundwater system evaluated in this study. The effectiveness of the nickel catalyst and nZVI, with respect to treatment of the chlorinated solvents, also appeared to be highly dependent on the groundwater geochemical conditions. Overall results of this study suggest that the degradation mechanisms involving nickel catalysts and nZVI in natural soil/groundwater systems are not well‐understood, and addition of metal catalysts to ZVI may not necessarily enhance observed degradation rates in natural systems.
Effectiveness of Zerovalent Iron and Nickel Catalysts for Degrading Chlorinated Solvents and n‐Nitrosodimethylamine in Natural Groundwater
Laboratory batch experiments were performed to evaluate the effectiveness of nickel catalysts, nanoscale zerovalent iron (nZVI) doped with palladium, and microscale ZVI for treatment of tetrachloroethene, trichloroethene, and n‐nitrosodimethylamine (NDMA) in soil‐groundwater slurries. Results indicated that the presence of NDMA inhibited degradation of chlorinated solvents. Although both the nickel catalyst and nZVI were able to degrade NDMA in deionized water, neither of these metals was effective at degrading NDMA in the soil–groundwater system evaluated in this study. The effectiveness of the nickel catalyst and nZVI, with respect to treatment of the chlorinated solvents, also appeared to be highly dependent on the groundwater geochemical conditions. Overall results of this study suggest that the degradation mechanisms involving nickel catalysts and nZVI in natural soil/groundwater systems are not well‐understood, and addition of metal catalysts to ZVI may not necessarily enhance observed degradation rates in natural systems.
Effectiveness of Zerovalent Iron and Nickel Catalysts for Degrading Chlorinated Solvents and n‐Nitrosodimethylamine in Natural Groundwater
Schaefer, Charles E. (Autor:in) / Topoleski, Corinne (Autor:in) / Fuller, Mark E. (Autor:in)
Water Environment Research ; 79 ; 57-62
01.01.2007
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Natural attenuation of chlorinated solvents in soil and groundwater
| British Library Conference Proceedings | 2002