Lab and Field work

1
Lab and Field work

• REMTEC WP4 On the feasibility of using ochre to
  stabilize CCA polluted soils

Sanne Skov Nielsen, Peter Kjeldsen and Rasmus
Jakobsen
2
The method

• CCA polluted soils
• -Wood impregnation with arsenic, chromium, cupper
• -Arsenic is leaching
• -Clean up is expensive
• Ochre
• -Iron oxide
• -Waste from water treatment
• -Sorbs arsenic strongly
• .but looses sorption capacity with time
• Mix ochre and soil in situ Cheap and easy?

3
Status september 2009

• April-August 2009 4 months on leave
• -Report on Collstrup site to The Capital Region
  (Region Hovedstaden)
• Starting up Fieldwork
• -Hopefully on Collstrup site
• -Larger scale
• Starting up Bachelor Thesis
• -Labwork

4
Field work

• Objective To try the method on a larger scale
• Finding the right tools for mixing of ochre and
  soil
• Monitoring on a larger scale
• -Pore vater samplers
• -Geoprobe wells

5
Lab work

• Objective To speed up the processes of ochre in
  soil
• Artificial watertable
• -The effect of water logging om ochre
• -How much arsenic will be released?
• -Modelling

Communitcating vessels