Heteroaggregation and sedimentation rates for nanomaterials in natural waters.

  title={Heteroaggregation and sedimentation rates for nanomaterials in natural waters.},
  author={Joris T K Quik and Ilona Velzeboer and Marja Wouterse and Albert A Koelmans and Dik van de Meent},
  journal={Water research},
Exposure modeling of engineered nanomaterials requires input parameters such as sedimentation rates and heteroaggregation rates. Here, we estimate these rates using quiescent settling experiments under environmentally relevant conditions. We investigated 4 different nanomaterials (C60, CeO2, SiO2-Ag and PVP-Ag) in 6 different water types ranging from a small stream to seawater. In the presence of natural colloids, sedimentation rates ranged from 0.0001 m d(-1) for SiO2-Ag to 0.14 m d(-1) for… CONTINUE READING