MinImpact - Best practices for sustainable stabilisation and reuse of sulfidic soils with minimised environmental impact

Interreg Aurora

Period: 1.10.2023 - 30.9.2026

Content: Sulfidic soils are a big challenge when encountered in infrastructure projects
and urban expansion due to poor geotechnical properties and severe
acidification when disturbed.

The microbiology, geochemistry and soil mechanics of these soils are
interconnected and therefore, a multidisciplinary approach is needed to assess
the long-term environmental consequences of current management methods of
excavated/dredged sulfidic soils. The project consortium in Finland and Sweden
consists of organisations with the complementary and practical expertise that
are needed in this project.

The aim of the project is to build cross-border best practices regarding the
handling of sulfidic soils. The best practices will be developed in the
projects cross-border network through a mutual transfer of knowledge between
the project partners and the target group, i.e. permit-granting and supervisory
authorities, consultants, municipal urban planning offices, landfill management
companies and national transport authorities involved in land development
projects. The project partners will provide the knowledge and support needed
and the participants in the reference group will provide a practical
orientation to ensure that the best practices will be tailored to the actual
situation. This will thereby bridge the gap between knowledge base and practice
and help the decision making by the authorities and the implementation of
methods of safe soil use and/or disposal by other stakeholders involved in land
development projects.

The activities consist of field experiments with complementary laboratory
experiments, where management techniques of sulfidic soils under waterlogged
and drained conditions and with different amendments are investigated in order
to enhance the existing knowledge base. The project results in a report on best
practices to support authorities and contractors during the permitting process
to allow a local and resource efficient management of the excavated soil.

Focus area: Hållbar energiteknik

Campus: Vasa Wolffskavägen 33

Financers: Interreg Aurora, Lapin_Liitto

Project owner: Novia University of Applied Sciences

Project manager: Eva Högfors-Rönnholm

Partners: Luleå University och Technology, Linnaeus University, Dåva DAC