NAPASAN – Nanoparticles for groundwater damage repair

The NAPASAN project was dedicated to enhancing the processes of non-valent iron (nZVI) nanoparticles production regarding the selectivity of the pollutants to be removed and considering the relevant economic aspects. At the same time, the risks of using such nanoparticles for restoration of damage caused by groundwater were to be assessed, and proof was to be provided of the nanoparticles’ safe use regarding the success of restoration.

The following results were obtained within five interlinked work packages:

  • A new efficient method for production of non-valent iron (nZVI) nanoparticles through grinding of micro-iron was developed and was successfully tested on a large scale. Within the project, the new nZVI nanoparticles were characterised in detail and the production process and carrier suspension were optimised (UVR-FIA, KWI, TU Berlin, TZW, RWTH)

  • Methods for incorporation and dispersion of nanoparticles in the subsoil were developed successfully and the feasibility of their practical implementation at the pilot site was verified (VEGAS, Kiel University, TU Berlin, TZW, IBL)
  • To detect pollutants and iron nanoparticles (nZVI nanoparticles) in the aquifer, new monitoring arrays based on magnetic susceptibility measurement combined with micropumps were developed and tested both in the laboratory and at the pilot site (VEGAS, TU Berlin, Fugro, Hermes Messtechnik)
  • Model-assisted site investigation based on direct-push technologies as well as models for dispersion of the iron nanoparticles (nZVI nanoparticles) in the soil were refined (CAU, Fugro)
  • A scientifically supported pilot application was planned and implemented successfully (VEGAS, IBL, Fugro)

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