The release of landfill leachate, with its load of organic material, gives rise to a succession of redox zones in the contaminated aquifer. Indigenous microbial populations can couple the oxidation of the organic compounds to the reduction of a number of electron acceptors. The sequence of TEAPs (terminal electron acceptor processes): aerobic respiration, denitrification, Mn(IV)-reduction, Fe(III)-reduction, sulfate-reduction and methanogenesis is determined by the energy yield of each redox reaction. This study presents a kinetic description of these processes using the multispecies reactive transport code RT3D. A user-defined kinetic was developed in order to take into account the principal biogeochemical processes that are likely to occur downgradient of a landfill. This model was tested on simple batch, 1D and 2D problems before applying to a field data set collected at a mixed municipal and industrial landfill site located close to the city of Turin in Italy.

Modeling of Redox Zonation Downgradient of Landfill Sites / DI MOLFETTA, Antonio; Rolle, Massimo; Sethi, Rajandrea; Clement, T. P.. - ELETTRONICO. - (2005), pp. 1-12. ((Intervento presentato al convegno World Water & Environmental Congress (EWRI 2005) tenutosi a Anchorage, Alaska nel 15-19 maggio 2005.

Modeling of Redox Zonation Downgradient of Landfill Sites

DI MOLFETTA, Antonio;ROLLE, MASSIMO;SETHI, RAJANDREA;
2005

Abstract

The release of landfill leachate, with its load of organic material, gives rise to a succession of redox zones in the contaminated aquifer. Indigenous microbial populations can couple the oxidation of the organic compounds to the reduction of a number of electron acceptors. The sequence of TEAPs (terminal electron acceptor processes): aerobic respiration, denitrification, Mn(IV)-reduction, Fe(III)-reduction, sulfate-reduction and methanogenesis is determined by the energy yield of each redox reaction. This study presents a kinetic description of these processes using the multispecies reactive transport code RT3D. A user-defined kinetic was developed in order to take into account the principal biogeochemical processes that are likely to occur downgradient of a landfill. This model was tested on simple batch, 1D and 2D problems before applying to a field data set collected at a mixed municipal and industrial landfill site located close to the city of Turin in Italy.
2005
9780784407929
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1410889
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