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In agricultural areas, nitrate (NO 3− ) is a common groundwater pollutant as a result of extensive fertilizer application. At elevated concentrations, NO 3− consumption causes methemoglobinemia in infants and has been linked to several cancers; therefore, its removal from groundwater is important. The addition of hydrogen gas (H 2 ) via gas-permeable membranes has...
Column experiments were performed to investigate a technology for remediating aquifers contaminated with chlorinated solvents. The technology involves installation of hollow-fiber membranes in the subsurface to supply hydrogen gas (H 2 ) to groundwater to support biological reductive dechlorination in situ. Three laboratory-scale columns [control (N 2 only), continuous H 2 ...
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