Real occurring concentrations of cerium dioxide nanoparticles (CeO2) in the environment are not yet known. But as an alternative, the expected environmental cerium dioxide concentrations (PEC value) can be predicted using specific computer models.

 

Road run-off due to rain event © Mr. Twister / fotolia.comThe estimated release of cerium dioxide nanoparticles is in the range of 1000 - 1500 metric tons/year, which is significantly lower than other nanomaterials like titanium dioxide (38000 metric tons/year). Ceria nanoparticles are often applied in closed systems, e.g. for polishing wafers, where no release takes place.

The majority of released cerium dioxide nanoparticles is anticipated to occur in soil and landfills. By some estimation, approximately 0.0001 µg/l and 0.01 µg/kg from consumer products or diesel exhaust containing ceria nanoparticles will reach surface waters and soil, respectively. The values of ceria nanoparticles in soils located besides major roads in Great Britain were predicted to be 0.016 µg/kg. Due to draining water along the road surface, the water may contain up to 0.3 µg/l of cerium dioxide nanoparticles [1-4].

 

 

Overall, compared with other nanomaterials (e.g. TiO2 , Fullerenes, ZnO ) and many other chemicals, the expected environmental concentrations (PEC value) of ceria nanoparticles are very low

 

 

Literature arrow down

  1. Keller, AA et al. (2013), J Nanopart Res, 15(6).
  2. Tiede, K et al. (2009), J Chromatogr A, 1216(3): 503-509.
  3. Boxall ABA et al. (2008), Report: "Targeted monitoring for human pharmaceuticals in vulnerable source and final waters", Drinking Water Inspectorate Project No. WD0805 (Ref DWI 70/2/231)
  4. Johnson, AC et al. (2012), Environ Toxicol Chem, 31(11): 2582-2587.

 

 

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