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SUMMARY:Innovative materials for permeable reactive barriers - Claudiane O
 uellet-Plamondon\, CUED
DTSTART:20111104T160000Z
DTEND:20111104T170000Z
UID:TALK33150@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:Permeable reactive barriers (PRBs) are geoenvironmental remedi
 ation technology to treat contaminated groundwater as it flows though the 
 ground. Such installation can be needed to treat land prior to redevelopme
 nt. Natural zeolites\, organoclay and inorgano-bentonites are innovative m
 aterials for PRBs to reduce the groundwater toxicity. They are specific fo
 r certain compounds. Their modifications allow to target a wide range of t
 oxic molecules. The granular reactive materials are suitable for PRBs. Lab
 oratory experiments on adsorption isotherms\, reaction kinetics and mass b
 alance can guide the design of soil mix technology PRBs. The ICP-OES measu
 red metal and gas chromatography measured hydrocarbons. The inorgano-organ
 o-bentonite was decomposed into a pillared and an organoclays\, and charac
 terised with SEM\, XRD\, FTIR\, TGA and adsorption tests. The organic surf
 actant increased the distance between the clay layers\, which both increas
 ed the treatment ability and the permeability. Polypropylene glycol and le
 cithin are environmentally friendly compounds that can intercalate the ben
 tonite and change the zeolite surface. To extrapolate the results to long-
 term PRB installations\, the adsorption capacity of the reactive material 
 suggests that they can treat effectively groundwater from former industria
 l sites\, abandoned non-coal mines\, and petroleum compound leakages.
LOCATION:Engineering Department - Lecture Room 6
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