Dokl Biol Sci. 2010 Mar-Apr;431:124-127.
The aquatic macrophyte Ceratophyllum demersum immobilizes Au nanoparticles after their addition to water.
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PMID: 20506851 [PubMed - indexed for MEDLINE]
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ABSTRACT:
In the paper, it was discovered that the aquatic higher plant (macrophyte) hornwort (other English names: rigid hornwort, coontail, coon's tail; the Latin name: Ceratophyllum demersum) immobilized gold (Au) nanoparticles after their addition to water. This is the first time it was shown that the nanoparticles of gold (Au) in substantial amount bind to the living biomass of the aquatic macrophyte (namely, Ceratophyllum demersum).
The concentrations of Au were measured in the samples of the phytomass using neutron activation analysis (NAA). As a result of the binding and/or immobilization of the nanoparticles, the amount of Au in the samples of the phytomass increased manifold (by a factor of 430) above the background level of gold in the plant tissues. The increase was by two orders of magnitude.
The new data added some new information to the modern vision of the multifunctional role of the biota in the migration of elements in aquatic ecosystems, and water self-purification. Also, the result added new information to the studies of interactions of Au with organisms that may contribute to new biotechnologies (namely, phytotechnologies to remove heavy metals from water).
DOI: 10.1134/S0012496610020158.
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Some additional key words:
nanomaterials, sorption, biosorption, immobilization, environmental chemistry, biogeochemistry, water quality,
aquatic, higher plant, macrophyte, hornwort, rigid hornwort, coontail, coon's tail, gold, heavy metal, adsorption,
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