Exploració per autor "Sánchez Vila, Francisco Javier"
Ara es mostren els items 29-48 de 63
-
Improving degradation of emerging organic compounds by applying chaotic advection in Managed Aquifer Recharge in randomly heterogeneous porous media
Rodríguez Escales, Paula-Felicidad; Fernández García, Daniel; DRECHSEL, J.; Folch Sancho, Albert; Sánchez Vila, Francisco Javier (2017-05)
Article
Accés obertImproving degradation rates of emerging organic compounds (EOCs) in groundwater is still a challenge. Although their degradation is not fully understood, it has been observed that some substances are preferably degraded ... -
Improving the accuracy of risk prediction from particle-based breakthrough curves reconstructed with kernel density estimators
Siirila, Erica; Fernández García, Daniel; Sánchez Vila, Francisco Javier (2015-06)
Article
Accés obertWhile particle tracking techniques are often used in risk frameworks, the number of particles needed to properly derive risk metrics such as average concentration for a given exposure duration is often unknown. If too few ... -
Infilitration tests at the Sant Vicenç dels Horts artificial recharge experimental site
Barahona-Palomo, Marco; Pedretti, Daniele; Sánchez Vila, Francisco Javier (2010-05-07)
Text en actes de congrés
Accés obertInfiltration capacity is the key parameter in an artificial recharge operation site. Infiltration capacity is spatially variable, and during operation it is also temporally variable due to surface clogging processes. ... -
Injection of CO2-saturated brine in geological reservoir: a way to enhanced storage safety
Ahmad, Nawaz; Worman, Anders; Sánchez Vila, Francisco Javier; Jarsjö, Jerker; Bottacin Busolin, Andrea; Hellevang, Helge (John Gale, 2016-11)
Article
Accés obertInjection of free-phase supercritical CO2 into deep geological reservoirs is associated with risk of considerable return flows towards the land surface due to the buoyancy of CO2, which is lighter than the resident brine ... -
Interaction between physical heterogeneity and microbial processes in subsurface sediments: a laboratory-scale column experiment
Perujo Buxeda, Nuria; Sánchez Vila, Francisco Javier; Proia, Lorenzo; Romani Cornet, Anna Maria (2017-06)
Article
Accés obertPhysical heterogeneity determines interstitial fluxes in porous media. Nutrients and organic matter distribution in depth influence physicochemical and microbial processes occurring in subsurface. Columns 50 cm long were ... -
Linking biofilm spatial structure to real-time microscopic oxygen decay imaging
Rubol, Simonetta; Freixa, Anna; Sánchez Vila, Francisco Javier; Romani Cornet, Anna Maria (2018-02)
Article
Accés obertTwo non-destructive techniques, confocal laser scanning microscopy (CLSM) and planar optode (VisiSens imaging), were combined to relate the fine-scale spatial structure of biofilm components to real-time images of oxygen ... -
Mathematical equivalence between time-dependent single-rate and multirate mass transfer models
Fernández García, Daniel; Sánchez Vila, Francisco Javier (2015-05)
Article
Accés obertThe often observed tailing of tracer breakthrough curves is caused by a multitude of mass transfer processes taking place over multiple scales. Yet, in some cases, it is convenient to fit a transport model with a single-rate ... -
Microbial activity enhancement in constructed wetlands operated as bioelectrochemical systems
Fernández Gatell, Marta; Corbella Vidal, Clara; Sánchez Vila, Francisco Javier; Puigagut Juárez, Jaume (2022-01)
Article
Accés obertTreatment wetlands (TW) operated as bioelectrochemical systems (BES-TW) provide a higher degree of treatment than conventional TW. Yet, the fundamental processes or mechanisms for the envisaged better performance of BES-TW ... -
Microbial community changes induced by Managed Aquifer Recharge activities: linking hydrogeological and biological processes
Barba Ferrer, Maria del Carme; Folch Sancho, Albert; Gaju Ricart, Nuria; Sánchez Vila, Francisco Javier; Carrasquilla Gallego, Marc; Grau Martinez, Alba; Martínez Alonso, Maira (2019-01)
Article
Accés obertManaged Aquifer Recharge (MAR) is a technique used worldwide to increase the availability of water resources. We study how MAR modifies microbial ecosystems and its implications for enhancing biodegradation processes to ... -
Mobility and interaction of heavy metals in a natural soil
Bianchi Janetti, Emanuela; Dror,Ishai; Riva, Monica; Guadagnini, Alberto; Sánchez Vila, Francisco Javier; Berkowitz, Brian (2013-04)
Article
Accés restringit per política de l'editorialWe study the mobility and interaction under competing conditions observed for copper (Cu2+) and zinc (Zn2+) ions in the context of laboratory-scale experiments performed in natural soil columns. The experiments focus on ... -
Modeling long term Enhanced in situ Biodenitrification and induced heterogeneity in column experiments under different feeding strategies
Rodríguez Escales, Paula-Felicidad; Folch Sancho, Albert; Van Breukelen, Boris; Vidal Gavilan, Georgina; Sánchez Vila, Francisco Javier (Elsevier, 2016-07)
Article
Accés obertEnhanced In situ Biodenitrification (EIB) is a capable technology for nitrate removal in subsurface water resources. Optimizing the performance of EIB implies devising an appropriate feeding strategy involving two design ... -
Modeling the fate of UV filters in subsurface: co-metabolic degradation and the role of biomass in sorption processes
Rodríguez Escales, Paula-Felicidad; Sánchez Vila, Francisco Javier (Elsevier, 2020-01)
Article
Accés obertUltraviolet filters (UVFs) are emerging organic compounds found in most water systems. They are constituents of personal care products, as well as industrial ones. The concentration of UVFs in the water bodies in space and ... -
Modelling a large oil spill in the aquifer of the Llobregat Lower Valley, Barcelona
Custodio Gimena, Emilio; Carrera Ramírez, Jesús; Sánchez Vila, Francisco Javier; Medina Sierra, Agustín; Manzano Arellano, María del Sol; Galarza López, German (European Center for Pollution research, 1993)
Text en actes de congrés
Accés restringit per política de l'editorialAbout 70 m3 of gasoline were poured as the result of an intentíonal breakdown of a major pipeline along the Lower Llobregat Valley. The main groundwater aquifer of the Barcelona area was affected by the gasoline that was ... -
Multicomponent reactive transport in multicontinuum media
Donado, Leonardo David; Sánchez Vila, Francisco Javier; Dentz, Marco; Carrera Ramírez, Jesús; Bolster, Diogo (2009)
Article
Accés obertMulticomponent reactive transport in aquifers is a highly complex process, owing to a combination of variability in the processes involved and the inherent heterogeneity of nature. To date, the most common approach is to ... -
On multi-model assessment of complex degradation paths: the fate of diclofenac and its transformation products
Ceresa, Laura; Guadagnini, Alberto; Rodríguez Escales, Paula-Felicidad; Riva, Monica; Sánchez Vila, Francisco Javier; Porta, Giovanni M. (John Wiley & sons, 2023-01)
Article
Accés obertWe present a methodology to quantify the impact of model structure and parametric uncertainty on formulations targeting biotransformation processes of Emerging Contaminants in subsurface water resources. The study is ... -
On the formation of multiple local peaks in breakthrough curves
Siirila, Erica; Sánchez Vila, Francisco Javier; Fernández García, Daniel (2015-04)
Article
Accés obertThe analysis of breakthrough curves (BTCs) is of interest in hydrogeology as a way to parameterize and explain processes related to anomalous transport. Classical BTCs assume the presence of a single peak in the curve, ... -
Optimal reconstruction of reaction rates from particles distributions
Fernández García, Daniel; Sánchez Vila, Francisco Javier (2010-05-07)
Text en actes de congrés
Accés obertRandom walk particle tracking methodologies to simulate solute transport of conservative species constitute an attractive alternative for their computational efficiency and absence of numerical dispersion. Yet, problems ... -
Particle density estimation with grid-projected and boundary-corrected adaptive kernels
Solé Marí, Guillem; Bolster, Diogo; Fernández García, Daniel; Sánchez Vila, Francisco Javier (Elsevier, 2019-09)
Article
Accés obertThe reconstruction of smooth density fields from scattered data points is a procedure that has multiple applications in a variety of disciplines, including Lagrangian (particle-based) models of solute transport in fluids. ... -
Power assisted MFC-based biosensor for continuous assessment of microbial activity and biomass in freshwater ecosystems
Fernández Gatell, Marta; Sánchez Vila, Francisco Javier; Puigagut Juárez, Jaume (Elsevier, 2022-08)
Article
Accés restringit per política de l'editorialMicrobial activity and biomass are important factors that determine nutrient and carbon fluxes in freshwater ecosystems and, therefore are also related to both water quality and climate change induced stressors. This study ... -
Probabilistic assessment of spatial heterogeneity of natural background concentrations in large-scale groundwater bodies through Functional Geostatistics
Guadagnini, Laura; Menafoglio, Alessandra; Sánchez Vila, Francisco Javier; Guadagnini, Alberto (Elsevier, 2020-10)
Article
Accés obertWe propose and exemplify a framework to assess Natural Background Levels (NBLs) of target chemical species in large-scale groundwater bodies based on the context of Object Oriented Spatial Statistics. The approach enables ...