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SUMMARY:Novel in-situ chemical oxidation for soil remediation - Yemi Akiny
 ugha\, CUED
DTSTART:20130613T150000Z
DTEND:20130613T160000Z
UID:TALK44932@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:In-situ chemical oxidation is an established technology for th
 e remediation of contaminated soils and groundwater\, with over 20-year hi
 story of successful deployment particularly in the US. Conventional oxidan
 ts including Fenton’s reagent and ozone\, suffer from limitations such a
 s competing reactions with chemical species in the soil and aquifer matrix
 \, which often lead to remedial inefficiencies. Emerging oxidants such as 
 persulphate are being tested and proving to be effective in addressing the
  limitations of these conventional oxidants. However\, very little is know
 n about the interaction of the persulphate with reductive species within t
 he sub-surface. Further\, when injected into soils\, in-situ chemical oxid
 ation can create unstable ground conditions due to the high water content 
 required to achieve thorough mixing. \n\nThis seminar presents laboratory 
 studies on the effectiveness of ferrous-ion activated persulphate in treat
 ing diesel range organics-spiked sandy soils under soil-mixing conditions.
  Further\, the potential of treating these soils by cement-activated persu
 lphate was investigated with the aim of establishing post-remedial ground 
 conditions suitable for faster re-use. Using data from different sites acr
 oss the UK and EU\, the research studied the effects of select chemical pr
 operties of uncontaminated soil and groundwater on persulphate demand. Fin
 ally\, lessons learnt from pilot field trials will be discussed.\n
LOCATION:Engineering Department - Lecture Room 3
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