So Soil il Mixin ixing De Developmen ent t of of a - - PowerPoint PPT Presentation

▶
so soil il mixin ixing
SMART_READER_LITE
LIVE PREVIEW

So Soil il Mixin ixing De Developmen ent t of of a - - PowerPoint PPT Presentation

Oct 04, 2022 170 likes •328 views

Reductiv ive dechlo lorin inatio ion via via ir iron based So Soil il Mixin ixing De Developmen ent t of of a sustainable le tech echnique a reg egional coll ollaborati tion Katerina Hantzi, Capitol Region of Denmark 21. May

slide-1
SLIDE 1

Reductiv ive dechlo lorin inatio ion via via ir iron based So Soil il Mixin ixing

De Developmen ent t of

  • f a sustainable

le tech echnique – a reg egional coll

  • llaborati

tion Katerina Hantzi, Capitol Region of Denmark

  • 21. May 2019 - AQUACONSOIL
slide-2
SLIDE 2

CROSS BORDER COOPERATION

1

St Stakehol

  • lder:

Funding

  • Duration: 1. Sep. 2017- 31. Aug. 2020
  • Budget: 1,35 mio. €
  • EU’s regional development fund Interreg

Öresund-Kattegat-Skagerak: 0,68 mio. €

slide-3
SLIDE 3

COMMON INTERESTS

2

Sites or probable sites contaminated with chlorinated solvents in the ÖKS-region (e.g. The Capitol Region of Denmark, and Skåne, Halland and Västra Götalands counties in Sweden).

CAPITOL REGION OF DENMARK SW SWEDEN Oeresund

slide-4
SLIDE 4

SOIL MIXING

3

➢ Develop the soil mixing technique regarding chlorinated solvents, ➢ Improve the geotechnical and energy efficiency performance, ➢ Demonstrate the new functions in-situ.

slide-5
SLIDE 5

SUSTAINABLE SOIL MIXING

4

Lab Pilot Full Scale

➢ Find suitable Fe-additives to reach chemical degradation of TCE:

  • FeCl2
  • FeCl2+magnetit,
  • S-nZVI
  • ZVI+ FeSO4

➢ Find the right combination of binder components ➢ Optimize recipe to increase the energy efficiency of the method

slide-6
SLIDE 6

RESULTS - Shear Strength

5

Clay Till

slide-7
SLIDE 7

RESULTS - Shear Strength FeCl2

6

10 20 30 40 50 60 70 80 90 1 2 3 4 5 6 7 8

Shear Strength (kPa) Days

B.1 B B.2 K.0 J.0 I.0 I J K

FeCl2 (green) and "Soft Control" (yellow)

slide-8
SLIDE 8

RESULTS - Shear Strength S-nZVI

7

50 100 150 200 250 300 1 2 3 4 5 6 7 8

Shear Strength (kPa) Days

F G H

S-nZVI (green) and "Hard Control" (blue)

Clay Till

slide-9
SLIDE 9

RESULTS reductive dechlorination

8

Day 7 14 34 Additive: Hard

Magnetite + Soft ZVI + Intermediate Contr. FeCl2 S-nZVI Contr. FeSO4 Contr. FeCl2 FeCl2

slide-10
SLIDE 10

RESULTS – TCE-concentration; Fe-additives

9

slide-11
SLIDE 11

RESULTS – Degradation; Fe-additives

10

slide-12
SLIDE 12

T½ 2.0 T½ 9.9 T½ in days T½ 17 T½ 2.3 T½ 17 T½ 3.0 T½ 11 T½ 3.9 T½ 17

RESULTS – Degradation rate; T½ in in days

slide-13
SLIDE 13

OPTIMIZE RECIPE

Next xt step in in lab lab: ❑ Continue with S-nZVI ❑ Test high and low concentrations of TCE:

1000 mg TCE /kg soil and 100 mg TCE/ kg soil

❑ Test dose of reactant ❑ Test dose of binder ❑ Test different binders:

Cement-slagg: 30-70 (%); 50-50 (%)

12

slide-14
SLIDE 14

HÅLLBAR SOIL MIXING

THANK YOU FOR YOUR ATTENTION QUESTIONS?

slide-15
SLIDE 15

HÅLLBAR SOIL MIXING

Geological Survey of Sweden: Klas las Arn rnerdal & Eri rik Bergstedt Swedish Geotechnical Institute: Da Dary rya Kupry ryia ianchyk, Wilh ilhelm Ra Rankka & Cecili ilia Toomväli i Capitol Region of Denmark: Anna Toft DTU Environment, Denmark: Annika Fjo Fjordbøge Swedish Transport Adm.: Per Lin Lind Our consultants: COWI an and Ge Geosyntec

AKNOWLEDGEMENTS