Abstract

A combination of a parallel fracture model with the PHREEQC-2 geochemical model wasdeveloped to simulate sequential flow and chemical transport with reactions in fracturedmedia where both laminar and turbulent flows occur. The integration of non-laminar flowresistances in one model produced relevant effects on water flow velocities, thus improvingmodel prediction capabilities on contaminant transport. The proposed conceptual modelconsists of 3D rock-blocks, separated by horizontal bedding plane fractures with variableapertures. Particle tracking solved the transport equations for conservative compounds andprovided input for PHREEQC-2. For each cluster of contaminant pathways, PHREEQC-2determined the concentration for mass-transfer, sorption/desorption, ion exchange, mineraldissolution/precipitation and biodegradation, under kinetically controlled reactive processes ofequilibrated chemical species. Field tests have been performed for the code verification. As anexample, the combined model has been applied to a contaminated fractured aquifer ofsouthern Italy in order to simulate the phenol transport. The code correctly fitted the fieldavailable data and also predicted a possible rapid depletion of phenols as a result of anincreased biodegradation rate induced by a simulated artificial injection of nitrates, upgradientto the sources.

Autore Pugliese

• Volpe Angela , Masciopinto Costantino

Tutti gli autori

• MASCIOPINTO C.; PALMIOTTA D.; VOLPE A.; CHERUBINI C.

Titolo volume/Rivista

Journal of contaminant hydrology

Anno di pubblicazione

2010

ISSN

0169-7722

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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