The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.
Influence of Ionic Strength, pH, and Cation Valence on Aggregation Kinetics of Titanium Dioxide Nanoparticles
Abstract
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. Currently, limited information is available on the issue. In this context, the purpose of the present article is to report initial measurements of the morphology and rate of formation of nano-TiO2 aggregates in aqueous suspensions as a function of ionic strength and of the nature of the electrolyte in a moderately acid to circumneutral pH range typical of soil and surface water conditions. Dynamic light scattering results show that 4-5 nm titanium dioxide particles readily form stable aggregates with an average diameter of 50-60 nm at pH approximately 4.5 in a NaCl suspension adjusted to an ionic strength of 0.0045 M. Holding the pH constant but increasing the ionic strength to 0.0165 M, leads to the formation of micron-sized aggregates within 15 min. At all other pH values tested (5.8-8.2), micron-sized aggregates form in less than 5 min (minimum detection time), even at low ionic strength (0.0084-0.0099 M with NaCl). In contrast, micron-sized aggregates form within 5 min in an aqueous suspension of CaCl2 at an ionic strength of 0.0128 M and pH of 4.8, which is significantly faster than observed for NaCI suspensions with similar ionic strength and pH. This result indicates that divalent cations may enhance aggregation of nano-TiO2 in soils and surface waters. Optical micrographs show branching aggregates of sizes ranging from the 1 microm optical limit of the microscope to tens of micrometers in diameter.
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Cites
Environmental Chemistry of Soils
McBride, M. B. (1994) · Medical Entomology and Zoology · Cited by 5,997
Gaya, U. I., & Abdullah, A. H. (2008) · Journal of Photochemistry and Photobiology C: Photochemistry Reviews · doi:10.1016/j.jphotochemrev.2007.12.003 · Cited by 2,984
The potential environmental impact of engineered nanomaterials
Colvin, V. L. (2003) · Nature Biotechnology · doi:10.1038/nbt875 · Cited by 2,158
Environmental behavior and ecotoxicity of engineered nanoparticles to algae, plants, and fungi
Navarro, E., Baun, A., Behra, R., Hartmann, N. B., Filser, J., Miao, A.-J., Quigg, A., Santschi, P. H., & Sigg, L. (2008) · Ecotoxicology · doi:10.1007/s10646-008-0214-0 · Cited by 1,772
Comparative eco-toxicity of nanoscale TiO2, SiO2, and ZnO water suspensions
Adams, L. K., Lyon, D. Y., & Alvarez, P. J. J. (2006) · Water Research · doi:10.1016/j.watres.2006.08.004 · Cited by 1,543
Assessing the Risks of Manufactured Nanomaterials
Wiesner, M. R., Lowry, G. V., Alvarez, P., Dionysiou, D., & Biswas, P. (2006) · Environmental Science & Technology · doi:10.1021/es062726m · Cited by 1,160
Aggregation and Sedimentation of Aqueous Nanoscale Zerovalent Iron Dispersions
Phenrat, T., Saleh, N., Sirk, K., Tilton, R. D., & Lowry, G. V. (2007) · Environmental Science & Technology · doi:10.1021/es061349a · Cited by 1,084
Long, T. C., Saleh, N., Tilton, R. D., Lowry, G. V., & Veronesi, B. (2006) · Environmental Science & Technology · doi:10.1021/es060589n · Cited by 870
Daphnia magna mortality when exposed to titanium dioxide and fullerene (C60) nanoparticles
Lovern, S. B., & Klaper, R. (2006) · Environmental Toxicology and Chemistry · doi:10.1897/05-278r.1 · Cited by 600
Illés, E., & Tombácz, E. (2006) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2005.08.003 · Cited by 567
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Hotze, E. M., Phenrat, T., & Lowry, G. V. (2010) · Journal of Environmental Quality · doi:10.2134/jeq2009.0462 · Cited by 1,257
Nanoparticle colloidal stability in cell culture media and impact on cellular interactions
Moore, T. L., Rodriguez-Lorenzo, L., Hirsch, V., Balog, S., Urban, D., Jud, C., Rothen-Rutishauser, B., Lattuada, M., & Petri-Fink, A. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00487f · Cited by 1,082
Impact of water matrix on the removal of micropollutants by advanced oxidation technologies
Lado Ribeiro, A. R., Moreira, N. F. F., Li Puma, G., & Silva, A. M. T. (2019) · Chemical Engineering Journal · doi:10.1016/j.cej.2019.01.080 · Cited by 574
Effects of inorganic ions and natural organic matter on the aggregation of nanoplastics
Cai, L., Hu, L., Shi, H., Ye, J., Zhang, Y., & Kim, H. (2018) · Chemosphere · doi:10.1016/j.chemosphere.2018.01.052 · Cited by 263
Xekoukoulotakis, N. P., Drosou, C., Brebou, C., Chatzisymeon, E., Hapeshi, E., Fatta-Kassinos, D., & Mantzavinos, D. (2011) · Catalysis Today · doi:10.1016/j.cattod.2010.09.027 · Cited by 148
Metadata
- Authors
- French, R. A., Jacobson, A. R., Kim, B., Isley, S. L., Penn, R. L., & Baveye, P. C.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-01-21
- Volume
- 43
- Issue
- 5
- Pages
- 1354-1359
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2036980596
- Cited by
- 788
- References
- 26
- FWCI
- 24.43
- Type
- journal article
- Language
- en
- Open access
- closed
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- French, R. A., Jacobson, A. R., Kim, B., Isley, S. L., Penn, R. L., & Baveye, P. C. (2009). Influence of Ionic Strength, pH, and Cation Valence on Aggregation Kinetics of Titanium Dioxide Nanoparticles. Environmental Science & Technology. https://doi.org/10.1021/es802628n
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