+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Stability of commercial metal oxide nanoparticles in water

, : Stability of commercial metal oxide nanoparticles in water. Water Research 42(8-9): 2204-2212

The fate of commercial nanoparticles in water is of significant interest to health and regulatory authorities. This research investigated the dispersion and stability of metal oxide nanoparticles in water as well as their removal by potable water treatment processes. Commercial nanoparticles were received as powder aggregates, and in water neither ultrasound nor chemical dispersants could break them up into primary nanoparticles. Lab-synthesized hematite was prepared as a primary nanoparticle (85 nm) suspension; upon drying and 1-month storage, however, hematite formed aggregates that could not be dispersed completely as primary nanoparticles in water. This observation may explain why it is difficult to disperse dry commercial nanoparticles. Except for silica, other nanoparticles rapidly aggregated in tap water due to electric double layer (EDL) compression. The stability of silica in tap water is related to its low Hamaker constant. For all these nanoparticles, at an alum dosage of 60 mg/L, coagulation followed by sedimentation could remove 20-60% of the total nanoparticle mass. Filtration using a 0.45 microm filter was required to remove more than 90% of the nanoparticle mass.


PMID: 18164742

DOI: 10.1016/j.watres.2007.11.036

Other references

Yang, B.; Xu, J.; Xu, F.; Zou, Z.; Ye, C.; Mei, C.; Mao, Z., 2014: Intravascular administration of mannitol for acute kidney injury prevention: a systematic review and meta-analysis. The effects of mannitol administration on acute kidney injury (AKI) prevention remain uncertain, as the results from clinical studies were conflicting. Due to the lack of strong evidence, the KDIGO Guideline for AKI did not propose completely evid...

Kitamura, S.; Ando, S.; Shibata, M.; Tanabe, K.; Sato, C.; Inagaki, M., 1989: Protein kinase C phosphorylation of desmin at four serine residues within the non-alpha-helical head domain. We reported that phosphorylation by either cAMP-dependent protein kinase or protein kinase C (Ca2+/phospholipid-dependent enzyme) in vitro induces disassembly of the desmin filaments (Inagaki, M., Gonda, Y., Matsuyama, M., Nishizawa, K., Nishi, Y....

Heslop, I.R.P., 1962: Fifth supplement to the Indexed check-list of British Lepidoptera with the English name of each of the 2,313 species (1947). Entomologist's Gazette, 13: 7-9

Armbrecht, B.H., 1970: Reaction between paperazine and chlorpromazine. New England Journal of Medicine 282(26): 1490-1491

Shemer, H.; Narkis, N., 2004: Mechanisms and inorganic byproducts of trihalomethane compounds sonodegradation. Organic pollutants can be sonodegraded by two pathways: pyrolysis, oxidation by free radicals, or the combination of both. The sonolytic degradation mechanisms and byproducts formation of aqueous trihalomethanes (THMs) were investigated at acousti...

Heiman, G.A.; Greenberg, D.A., 2003: Computer simulation study of population stratification. American Journal of Human Genetics 73(5): 620, November

Averell, James L., 1945: Rules of thumb for thinning loblolly pine. Stand densities resulting from the application of 6 different spacing rules derived from functions of av. tree diam. are compared graphically. Choice of a rule depends on length of cutting cycle employed.

Haichun Zhang; A.P.R.snitsyn, 2006: Two new anaxyelid sawflies (Insecta, Hymenoptera, Siricoidea) from the Yixian Formation of western Liaoning, China. Two new species, Brachysyntexis robusta and Syntexyela continentalis, are described from the Yixian Formation of Beipiao, Liaoning Province, China and assigned to the subfamily Anaxyelinae of the Anaxyelidae. Their palaeobiology is briefly discuss...

Marston, D.J.; Goldstein, B., 2006: Actin-based forces driving embryonic morphogenesis in Caenorhabditis elegans. Morphogenesis is the process by which multicellular organisms transform themselves from a ball of cells into an organized animal. Certain virtues of Caenorhabditis elegans make it an excellent model system for the study of this process: it is gene...

Jeener, R.; Lemoine, P.; Lavand'-Homme, C., 1954: Detection and properties of forms of tobacco mosaic virus which are non-infectious and contain no ribonucleic acid. The form of 2 non-infectious proteins, found in tobacco plants in which a systemic infection due to mosaic virus has developed, is described, and their possible roles as virus precursors are discussed.