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Transient flow enhanced aquifer remediation

Total activity: 7
Type of activity
Competitive project
Funding entity
MIN DE ECONOMIA Y COMPETITIVIDAD
Acronym
FEAR
Funding entity code
CGL2012-38120
Amount
85.410,00 €
Start date
2013-01-01
End date
2015-12-31
Keywords
acuíferos, clogging, descontaminación, fluctuaciones del flujo, inyección de sustancias, mezcla, transporte reactivo, tratamiento in situ
Abstract
Improper disposals of hazardous wastes in the subsurface are threatening the environment and public
health worldwide. In situ treatment technologies for restoring groundwater quality are often based on
the delivery of chemical substances into the contaminated media to promote favourable reactions.
Local heterogeneities and the presence of well-connected permeable structures typically prevent those
chemicals from fully mixing within the contaminated media, i.e., the injected compounds cannot
access the contamination trapped in low permeability areas. The rationale of the proposal contends
that by inducing temporal fluctuations of water fluxes through a set of extraction/injection wells one can
enhance the delivery and subsequent mixing of chemical compounds into the contaminated media.
Moreover, for sites contaminated with heavy metals, these temporal fluctuations of water fluxes can
further disperse the precipitation front associated with immobilization techniques, retarding clogging
effects and enlarging the area of application. This project proposes a combined numerical-theoretical
analysis to examine the potential applicability of such techniques. The project tackles basic research
questions as well as the development of new modeling methodologies and tools aimed at making
proper predictions of this type of remedial efforts. Basic research will analyse the effects of enhanced
mixing and delivery due to temporal fluctuations of water fluxes, and their corresponding effects on the
precipitation front formed during metal remediation. First, solute tansport experiments perfomed in
large-scale experimental tanks with synthetic heterogeneous aquifers will be used to identify and
characterize processes so as to better quantify the efficiencies obtained during the application of such
techniques. These processes will be incoporated into efficient reactive transport codes that can
properly describe in detail natural heterogeneity as well as geochemical reactions. These models will
be used to interpret the experiments and to study unknwon processes.
Scope
Adm. Estat
Plan
Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica 2008-2011
Call year
2012
Funcding program
Biodiversidad, Ciencias de la Tierra y Cambio Global
Funding subprogram
Ciencias de la Tierra
Funding call
Proyectos de investigación y acciones complementarias-CGL (BTE). Proyectos de investigación
Grant institution
Gobierno De España. Ministerio De Economía Y Competitividad, Mineco

Participants

Scientific and technological production

1 to 7 of 7 results