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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Developing mobile nanometals for insitu remediation applications
DTSTART:20110223T161500
DTSTAMP:20260509T113047Z
UID:f2be36d042f07d404d2a013d9cf80420adb4def736bd1f5e1910d83b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Denis M. O'Carroll\, Assistant professor\, University of We
 stern Ontario (CA)\nNanometals have received significant attention in rece
 nt years due to their ability to rapidly degrade numerous priority source 
 zone contaminants in controlled laboratory studies.  Unfortunately nanosca
 le metals rapidly grow to micron-sized particles\, due magnetic attractive
  forces\, and ultimately settle out of aqueous solutions.  This makes effe
 ctive in situ delivery to contaminated sediments very difficult.  The addi
 tion of polymers on the surface of nanometals significantly improves their
  stability in aqueous solutions.  This talk will briefly highlight the sig
 nificant reactivity of nanometals and then discuss a series of 1D column e
 xperiments that were conducted to explore the mobility of polymer stabiliz
 ed nanometals in sand systems.  For the range of conditions tested the nan
 ometals exhibited good mobility in the 10 cm long columns.  The ability of
  a newly developed numerical model to predict observed behaviour will be p
 resented.   To further explore the utility of nanometals for site remediat
 ion the developed numerical simulator was used to model nanometal mobility
  at the field scale.  The two-dimensional finite element model\, which inc
 luded a heterogeneous permeability field from an actual field site\, was u
 sed to explore challenges associated with field scale application of nanom
 etals.  Finally the talk will discuss scale up of laboratory synthesis pro
 cedures for a recent field trial and present preliminary results.
LOCATION:GR C0 01
STATUS:CONFIRMED
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