Surface charge and stability of CeO 2 nanoparticles in natural water
نویسندگان
چکیده
Engineered nanoparticles are widely incorporated into a large number of consumer products due to their specific physico-chemical properties in comparison to bulk materials. Cerium dioxide nanoparticles (CeO2) are currently used in several applications: as a component of catalytic converters, as a UV blocking or polishing agent or as a diesel fuel additive. The fate of engineered nanoparticles in the aquatic environment is highly dependent on their aggregation, transport and surface chemistry. Interaction with natural organic matter (NOM) and solution chemistry are expected to play an important role in the behavior of nanoparticles in natural water. In our work we investigated the fate of cerium dioxide nanoparticles (JRC NM-212) in various models of natural waters. In particular, we adjusted the composition of some solutions according to the characteristic of the Geneva lake water. The influence of pH, ionic strength and concentration of NOM was also investigated by considering the CeO2 nanoparticle stability. Dynamic light scattering and electrophoretic measurement were used to study the surface charge and z-average [...] ORIEKHOVA, Olena, STOLL, Serge. Surface charge and stability of CeO 2 nanoparticles in natural water. In: 24th Earth Sciences Meeting, Pau (France), 27 – 31 October, 2015
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