Project 4.

<Decontamination of polluted soils>

Lecturer: Stoyan Gaydardzhiev University of Liege, Belgium

Group members: J. Tun Tun, H. Kissiger Noudjom, L. Mbogne, L. Wiendieck,

M. Hanöffner, B. Meyer, K. Günther, S. Held, F. Mucke, D. Menzel

22 April 2023 12. IPW - FH Nordhausen

Structure• 1 Introduction• 2 Project work

2.1 Task2.2 Method

2.2.1 Biological treament (in situ) 2.2.2 Screening (on site) 2.2.3 Soil washing (ex situ) 2.3 Calculation• 3 Summary

22 April 2023 12. IPW - FH Nordhausen

Introduction:• Definition of remediation

22 April 2023 12. IPW - FH Nordhausen

Remediation strategies for polluted soil

22 April 2023 12. IPW - FH Nordhausen

Further data:

• The surface area: 10 ha = 100,000 m²• Depht = 0.8 m• Soil = 80,000 m³• Mass = 128,000 t

22 April 2023 12. IPW - FH Nordhausen

Project work - Task• Given Facts:

- Density = 1.6 g/ cm³- pH = 7.1- CEC = 23 mg/g- Heavy Metals [μg/ g] - Pb: 1240- Zn: 1200- Cd: 15– [ Sand ] [Silt] [Clay ] [Carbon ]

56 % 32% 11% 1%

-Humidity: water content 1.5% mass of dry soil

-Organics: (from fuel leackage)

Vinylchloride – soluble (water)

Naphtalene – in water and gas

Phenol – in water and in solid

22 April 2023 12. IPW - FH Nordhausen

Method

22 April 2023 12. IPW - FH Nordhausen

Biological treatment

22 April 2023 12. IPW - FH Nordhausen

Soil washing (ex situ)

22 April 2023 12. IPW - FH Nordhausen

Moving drum screen - trommel

Centrifugal non-mechanical classifiers - Hydrocyclone

22 April 2023 12. IPW - FH Nordhausen

22 April 2023 12. IPW - FH Nordhausen

Calculation• Cost for renting mashines• Energy cost • Biological treatment• Excavation• Soil washing• Laboratory test• Labour charge

Approximate cost 200 € per m³

22 April 2023 12. IPW - FH Nordhausen

Summary

• Economical• Effective• Simple