Contaminated soil – new and innovative remediation methods

14. August 2014

Solution provider

The Capital Region of Denmark is working to ensure sustainable growth and development – and thus a good, healthy life for the region’s residents. Together with the municipalities, the business community and various organisations the capital region is aiming to become more energy efficient, climate prepared and attractive – green, safe and healthy.

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Challenge

The Capital Region of Denmark is responsible for mapping, investigating, and remediating contaminated soil and groundwater in the Greater Copenhagen area. Remediation of contaminated sites can be very expensive. Therefore, the region is continuously engaged in developing and adopting new and innovative remediation techniques with the aim of making remediation both cheaper, more efficient, and greener (i.e. less energy and material consuming).

Solution

The region is collaborating with universities, research institutions and companies in Denmark and internationally on this task. The work is carried out at several test sites. Current development projects focus on:

In situ remediation of contaminated groundwater:
Addition of chemicals, catalysts and/or bacteria to contaminant plumes in groundwater to enhance the degradation of contaminants to harmless products (water, carbondioxide etc).
Methods for stabilization of arsenic and other metals in polluted soil:
Various processes for immobilization of metals in soil and groundwater from a former wood treatment facility will be tested.
Delivery and mixing of remediation chemicals in the subsurface:
Testing of different tools and concepts for delivery of reactants in various geological conditions (direct push, screened wells equipped with packers etc.) and the subsequent documentation of delivery success.
Indoor air environment:
Development of investigation and remediation methods in relation to the impact of soil contamination on indoor air on houses on the surface. Methods include “fingerprinting” tools to distinguish indoor sources from the contribution from the soil contamination.