By a News Reporter-Staff News Editor at Ecology, Environment & Conservation -- Current study results on Environmental Science and Technology have been published. According to news reporting out of Plymouth, United Kingdom, by VerticalNews editors, research stated, "Manufactured nanoparticles (NPs) can associate with toxicants in the aqueous phase and these associations can influence the environmental fate, transport, and bioavailability of these toxicants in organisms. Dissolved metals (e.g., Hg2+) can be toxic in aquatic organisms, and, if metals associate with NPs in the aqueous phase, changes in bioavailability and toxicology may result."
Our news journalists obtained a quote from the research from the University of Plymouth, "Here we demonstrated that Hg2+ (25 mu g/L) can associate with aqueous (C-60)n (termed nC(60)) and increase aggregate size and settlement of nC(60) aggregates out of the water column over 24 h. The concentration of C-60 was directly related to concentration of Hg for nC(60) aggregates that settled to the bottom of the container. Bioavallability of Hg2+ in larval zebrafish Danio rerio, evaluated by assessment of metallothionein gene (mt2) expression, was reduced in the water column when nC(60)was present. However, zebrafish residing at the container bottom and exposed to nC(60) aggregates with associated Hg2+ had elevated expression of mt2 when compared to fish exposed to 25 mu g/L Hg2+. preparations without nC(60), which indicated nC(60) led to a localized increase in Hg2+ bioavailability."
According to the news editors, the research concluded: "Results indicate that aqueous nC(60) can sorb Hg2+, transport Hg2+ to substrate surface; and increase concentrations of bioavailable Hg2+ in organisms located where settled nC(60) aggregates accumulate."
For more information on this research see: Association of Hg2+ with Aqueous (C-60)n Aggregates Facilitates Increased Bioavailability of Hg2+ in Zebrafish (Danio rerio). Environmental Science & Technology, 2013;47(17):9997-10004. Environmental Science & Technology can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Environmental Science & Technology - www.pubs.acs.org/journal/esthag)
Our news journalists report that additional information may be obtained by contacting T.B. Henry, University of Plymouth, Biogeochem Res Center, Petr & Environm Geochem Grp, Plymouth PL4 8AA, Devon, United Kingdom. Additional authors for this research include S.J. Wileman, H. Boran and P. Sutton.
Keywords for this news article include: Europe, Plymouth, United Kingdom, Environmental Science and Technology
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