A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions

Masciopinto, Costantino, Volpe, Angela, Palmiotta, Domenico and Cherubini, Claudia (2010) A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions. Journal of Contaminant Hydrology, 117 1-4: 94-108. doi:10.1016/j.jconhyd.2010.07.003


Author Masciopinto, Costantino
Volpe, Angela
Palmiotta, Domenico
Cherubini, Claudia
Title A combined PHREEQC-2/parallel fracture model for the simulation of laminar/non-laminar flow and contaminant transport with reactions
Journal name Journal of Contaminant Hydrology   Check publisher's open access policy
ISSN 0169-7722
1873-6009
Publication date 2010-09-20
Sub-type Article (original research)
DOI 10.1016/j.jconhyd.2010.07.003
Volume 117
Issue 1-4
Start page 94
End page 108
Total pages 15
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Language eng
Abstract A combination of a parallel fracture model with the PHREEQC-2 geochemical model was developed to simulate sequential flow and chemical transport with reactions in fractured media where both laminar and turbulent flows occur. The integration of non-laminar flow resistances in one model produced relevant effects on water flow velocities, thus improving model prediction capabilities on contaminant transport. The proposed conceptual model consists of 3D rock-blocks, separated by horizontal bedding plane fractures with variable apertures. Particle tracking solved the transport equations for conservative compounds and provided input for PHREEQC-2. For each cluster of contaminant pathways, PHREEQC-2 determined the concentration for mass-transfer, sorption/desorption, ion exchange, mineral dissolution/precipitation and biodegradation, under kinetically controlled reactive processes of equilibrated chemical species. Field tests have been performed for the code verification. As an example, the combined model has been applied to a contaminated fractured aquifer of southern Italy in order to simulate the phenol transport. The code correctly fitted the field available data and also predicted a possible rapid depletion of phenols as a result of an increased biodegradation rate induced by a simulated artificial injection of nitrates, upgradient to the sources. Copyright
Keyword Bioremediation
Contaminant transport
Fractures flow
Geochemical model
Groundwater pollution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Mon, 07 Sep 2015, 21:43:54 EST by Jeannette Watson on behalf of School of Civil Engineering