Research & Projects

Colloidal properties

  • Analytical and numerical models describing the electrokinetic response of charged colloidal particles in water; electrokinetic experiments (electrophoresis, dielectric spectroscopy, electroacoustic methods); From the measurements and models, information about the surface charge and coating of the suspended clay is obtained. The flocculation behavior of clays can be deduced. 
  • Analytical and numerical models describing the transport of water and ions in clay pores; related streaming potential and electroosmosis experiments; From the experiments the permeability / leaching ability of the clay can be evaluated. 
  • Electrically induced birefringence (Kerr effect) measurements and related models describing the orientation or distribution of nanoparticles in electric fields hereby acquiring information about their charge and size. 
  • Numerical models simulating potentials and forces between interacting charged and coated surfaces; related experiments: atomic force microscopy (AFM), dynamic/static light scattering, titrations.

Clay flocculation and sediment bed properties (meso/macroscale)

  • Numerical models about the time evolution of particle size distributions (aggregation/break-up), Population Balance Equation.
  • Measuring the evolution of the floc size distribution in time and as function of the relevant parameters in the laboratory; link with the surface properties of the clay.
  • Rheology of clay slurries and link with the surface properties of the clay.
  • Analyzing the ions and water flows through clay layers by Seepage Induced Consolidation; in these macroscopic electroosmosis/streaming potentials experiments the compaction of the clay during the experiments play an important role and is representative  of in-situ clay behavior.