Influence of ionic strength, pH, and cation valence on aggregation kinetics of TiO2 nanoparticles French, Rebecca A. ; Jacobson, Astrid R. ; Kim, Bojeong ; Isley, Sara L. ; Penn, R. Lee ; Baveye, Philippe C. Abstract Publication: Geochimica et Cosmochimica Acta Supplement Pub Date: July 2008 Bibcode: 2008GeCAS..72R.283F