Influence of Ionic Strength, pH, and Cation Valence on Aggregation Kinetics of Titanium Dioxide Nanoparticles

• Published in: Environmental science & technology Vol. 43; no. 5; pp. 1354 - 1359
• Main Authors: French, Rebecca A, Jacobson, Astrid R, Kim, Bojeong, Isley, Sara L, Penn, R. Lee, Baveye, Philippe C
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.03.2009
• Subjects: Animal, plant and microbial ecology; Applied ecology; Applied sciences; Biological and medical sciences; Cations, Divalent - chemistry; Cations, Monovalent - chemistry; Chemical compounds; Chemical reactions; Consumer goods; Ecotoxicology, biological effects of pollution; Environment; Environmental Processes; Environmental science; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Hydrogen-Ion Concentration; Ions; Kinetics; Nanoparticles; Nanoparticles - chemistry; Nanoparticles - ultrastructure; Osmolar Concentration; Pollution; Reaction kinetics; Soil; Suspensions; Time Factors; Titanium; Titanium - chemistry; Ionic strength; Nanoparticle; Light scattering; Morphology; Surface water; Kinetics; Titanium oxide; Catalyst; Interstitial water

The extensive use of titanium dioxide nanoparticles (nano-TiO2) in many consumer products has raised concerns about possible risks to the environment. The magnitude of the threat may depend on whether nano-TiO2 remains dispersed in the environment, or forms much larger-sized aggregates or clusters....