A kinetic approach for simulating redox-controlled fringe and core biodegradation processes in groundwater: model development and application to a landfill site in Piedmont, Italy

Massimo Rolle, T. Prabhakar Clement, Rajandrea Sethi, Antonio Di Molfetta

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A three-dimensional model for predicting redox controlled, multi-species reactive transport processes in groundwater systems is presented. The model equations were fully integrated within a MODFLOW-family reactive transport code, RT3D. The model call simulate organic compound biodegradation Coupled to different terminal electron acceptor processes. A computational approach, Which uses the spatial and temporal distribution of the rates of different redox reactions, is proposed to map redox zones. The method allows one to quantify and visualize the biological degradation reactions occurring in three distinct patterns involving fringe, pseudo-core and core processes. The capabilities of the numerical model are demonstrated using two hypothetical examples: a batch problem and a simplified two-dimensional reactive transport problem. The model is then applied to all unconfined aquifer underlying a leaking landfill located near the city of Turin, in Piedmont (Italy). At this site, high organic load from the landfill leachate activates different biogeochemical processes, including aerobic degradation, denitrification, manganese reduction, iron reduction, sulfate reduction and methanogenesis. The model was able to describe and quantify these complex biogeochemical processes. The proposed model offers it rational framework for simulating coupled reactive transport processes occurring beneath a landfill site. Copyright (C) 2008 John Wiley & Sons, Ltd.
Original languageEnglish
JournalHydrological Processes
Volume22
Issue number25
Pages (from-to)4905-4921
Number of pages17
ISSN0885-6087
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Water Science and Technology
  • Landfill
  • Leachate
  • Reaction rates
  • Reactive transport modelling
  • Redox zonation
  • TEAPs
  • Aerobic degradation
  • Biodegradation process
  • Biogeochemical process
  • Biological degradation
  • Computational approach
  • Fully integrated
  • Groundwater system
  • High organic
  • Iron reduction
  • Kinetic approach
  • Landfill leachate
  • Landfill site
  • Methanogenesis
  • Model development
  • Model equations
  • MODFLOW
  • Multi-species
  • Numerical models
  • Reactive transport
  • Reactive transport codes
  • Reactive transport problems
  • Spatial and temporal distribution
  • Sulfate reduction
  • Terminal electron acceptor process
  • Three-dimensional model
  • Unconfined aquifers
  • Aquifers
  • Biochemistry
  • Biodegradation
  • Biogeochemistry
  • Degradation
  • Groundwater resources
  • Hydrogeology
  • Landforms
  • Leachate treatment
  • Leaching
  • Manganese
  • Microbiology
  • Organic compounds
  • Redox reactions
  • Wastewater treatment
  • Refuse disposal
  • biodegradation
  • groundwater
  • landfill
  • leachate
  • numerical model
  • organic compound
  • reactive transport
  • spatial distribution
  • temporal distribution
  • three-dimensional modeling
  • transport process
  • unconfined aquifer
  • Eurasia
  • Europe
  • Italy
  • Piedmont [Italy]
  • Southern Europe
  • Torino [Piedmont]
  • Turin
  • WATER
  • FIELD-SCALE APPLICATION
  • SOLUTE TRANSPORT MODEL
  • NATURAL ATTENUATION
  • BIOGEOCHEMICAL PROCESSES
  • CONTAMINATED AQUIFER
  • ANAEROBIC BIODEGRADATION
  • POLLUTION PLUMES
  • POROUS-MEDIA
  • DENMARK
  • GEOCHEMISTRY
  • redox zonation
  • reaction rates
  • reactive transport modelling

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