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UID:20261031T044029EDT-1684cFv9Df@132.216.98.100
DTSTAMP:20261031T084029Z
DESCRIPTION:EVERYONE WELCOME\n\nIn the framework of groundwater remediation
 \, the injection of nanoscale and microscale zerovalent iron particles (NZ
 VI and MZVI\, respectively) for the generation of reactive zones represent
 s a promising remediation technology for the treatment of contamination so
 urces and dissolved plumes. To improve colloidal stability and mobility in
  the subsurface\, the use of biopolymers is usually required. Polymers are
  dosed in low concentrations to modify surface properties and increase par
 ticle-particle repulsion (mainly for NZVI) or in high concentration to for
 m shear-thinning fluids preventing particle sedimentation and improve deli
 very (mainly for MZVI). Nanoparticle (NP) transport in porous media is con
 trolled by particle-particle and particle-collector interactions\, typical
 ly modelled with kinetic terms of deposition onto the porous medium and co
 rresponding release. Ionic strength\, flow rate and fluid viscosity all pl
 ay a major role in determine the interactions between particles and porous
  medium\, and therefore deposition and release mechanisms and kinetics. Th
 is talk presents a modelling approach to simulate NP transport in porous m
 edia at laboratory and field scale\, under space- and time-variable ionic 
 strength and flow velocity. The key aspects considered here are the influe
 nce of salt concentration on attachment and detachment kinetics\, clogging
  phenomena\, and the rheological properties of the carrier fluid. The mode
 l was derived using a semi-empirical approach\, based on laboratory result
 s (colloidal stability\, rheological characterization of the slurries\, co
 lumn transport tests) and up-scaled for the simulation of large-scale scen
 arios. Applications to the analysis of laboratory transport tests\, to the
  preliminary design of NP-based remediation intervention\, and to the pred
 iction of long-term fate of NPs in the environment will be presented.\n
DTSTART:20160513T193000Z
DTEND:20160513T203000Z
LOCATION:Room 497\, Macdonald Engineering Building\, CA\, QC\, Montreal\, H
 3A 0C3\, 817 rue Sherbrooke Ouest
SUMMARY:Modelling the Transport in Porous Media of Iron Micro and Nanoparti
 cles for Groundwater Remediation
URL:https://www.mcgill.ca/tised/channels/event/modelling-transport-porous-m
 edia-iron-micro-and-nanoparticles-groundwater-remediation-260785
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