Physicochemical characterization and behavior of manufactured cerium ( IV ) oxide nanoparticles in aquatic systems
نویسندگان
چکیده
Nowadays engineered nanomaterials (ENM) are widely present in different areas of our life. Large application of ENM in daily used customer products leads to its released into the environment. The fate of ENM in aquatic system isn’t clearly understood that pose the threat for leaving organisms and for human health. Before making the risk assessment and the toxicity tests ENM should be fully characterized, also their behavior in the environment should be studied. By considering cerium(IV) oxide (CeO2) nanoparticles (NPs) we investigated the fate of ENM in aquatic environment. First, we characterized CeO2 NPs, and the point of zero charge was defined and the stability of CeO2 NPs versus pH was assessed. Then, the influence of physicochemical properties of aqueous medium as ionic strength, pH, and presence of natural polyelectrolytes on the CeO2 NPs behavior was investigated. We found that natural organic matter and electrolytes are modifying the surface of CeO2 NPs. Our results indicate that the effect on stabilization / destabilization and aggregate formation is due to the water chemistry. This study covers the [...] ORIEKHOVA, Olena, STOLL, Serge. Physicochemical characterization and behavior of manufactured cerium(IV) oxide nanoparticles in aquatic systems. In: 17th Frühjahrssymposium 2015, German Chemical Society's Young Chemists Section JCF, Münster (Germany), 25 – 28 March, 2015
منابع مشابه
Engineered nanomaterials , their fate and behavior in the environment . Case study of cerium ( IV ) oxide
Nowadays engineered nanomaterials (ENM) are widely used in different customer products that lead to their released into the environment. The ENM behavior in aquatic system is influenced by many factors including water chemistry, presence of natural colloids, biota etc. Despite intensive research conducted in this area the fate of ENM in aquatic system isn’t clearly understood that poses the thr...
متن کاملIn-vitro study of Radioprotection Effects of Cerium Oxide Nanoparticles in Exposure to MRC-5 Fibroblastic Cell lines with 6MV Photon Beams Using MTT Assay
Introduction: Recently Cerium oxide nanoparticles (CONPs) are being checked as interventional treatments in biological systems. The scavenging of free radicals by nanoparticles performance is the inhibition of Reactive Oxygen Species (ROS). Ionizing radiations can prevent the proliferation and differentiation of cells and even cause apoptosis. CONPs, as radioprotection, can pro...
متن کاملBioavailability of nanoscale metal oxides TiO(2), CeO(2), and ZnO to fish.
Nanoparticles (NPs) are reported to be a potential environmental health hazard. For organisms living in the aquatic environment, there is uncertainty on exposure because of a lack of understanding and data regarding the fate, behavior, and bioavailability of the nanomaterials in the water column. This paper reports on a series of integrative biological and physicochemical studies on the uptake ...
متن کاملSurface charge and stability of CeO 2 nanoparticles in natural water
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 i...
متن کاملWet chemical synthesis and physical characterization of doped CeO2 nanoparticles
Solid electrolytes based on doped cerium oxide, Ce(M)O2-δ (M = rare-earth cations), are of considerable interest for potential use in low temperature solid oxide fuel cells (LTSOFCs) due to its higher ionic conductivity than YSZ based solid electrolyte. In this research work, crystalline, pure Ce1-xMxO2-δ (where M = Gd or Sm, x = 0.10 or 0.20) based nanoparticles were prepared by chemical prec...
متن کامل