Determining the reactivity of reduced components in Dutch aquifer sediments
conference paper
Sediments from a single aquifer were incubated under atmospheric conditions for 54 days to determine the reactivity of reductants present. The stoichiometric relationships between O2 consumption and CO2 production were used to evaluate the relative importance of ongoing redox processes. Respiration of bulk organic matter (BOM) and pyrite oxidation were the major processes occurring, but there was also evidence of siderite oxidation. The rates of BOM oxidation decreased continuously during the experiment. Pyrite oxidation had a maximum in its oxidation rate during the acidification process. When the acidification was buffered by carbonate dissolution, the pyrite oxidation rates decreased continuously. More than one reductant in a sample could be oxidized simultaneously.
TNO Identifier
458462
Publisher
IAHS
Source title
Impact of human activity on groundwater dynamics, Proceedings of symposium held during the Sixth IAHS Scientific Assembly at Maasrricht, the Netherlands
Place of publication
Utrecht
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