Highly concentrated, reactive and stable dispersion of zero-valent iron nanoparticles: Direct surface modification and site application
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33154874" target="_blank" >RIV/61989592:15310/15:33154874 - isvavai.cz</a>
Alternative codes found
RIV/46747885:24220/15:#0003363
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S138589471401345X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S138589471401345X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cej.2014.10.024" target="_blank" >10.1016/j.cej.2014.10.024</a>
Alternative languages
Result language
angličtina
Original language name
Highly concentrated, reactive and stable dispersion of zero-valent iron nanoparticles: Direct surface modification and site application
Original language description
Nanoscale zerovalent iron (nZVI) particles with a narrow size distribution (40-80 nm) were modified with an environmentally acceptable non-ionic surfactant, Tween 80, with the aim to produce a highly concentrated aqueous dispersion (20% (w/w)) exhibiting temporal stability against aggregation and therefore retaining its mobility and extreme reactivity with pollutants. Powdered nZVI particles, prepared via a large-scale thermally induced process, were directly transferred into the 5% (w/w) aqueous solution of the Tween 80, which has not been performed before. Due to the nature of the surfactant molecules, they adsorb immediately at the new phase interface, which results in the formation of a thin, compact but pollutant permeable surface layer on nZVI particles (confirmed by TEM analysis). The temporal stability against aggregation and oxidation of the Tween 80 modified nZVI particles was monitored by XRD, Mössbauer spectroscopy, and DLS during its two-month storage. These analyses revealed an extraordinarily low degree of oxidation of the nZVI surface (estimated to represent less than 15%) and a high stability against aggregation even after two-month storage. The batch experiments with solutions contaminated by a mixture of chlorinated ethenes confirmed excellent reactivity of the Tween 80 stabilized nZVI particles with all studied pollutants (i.e., PCE, TCE, cis-DCE, trans-DCE). The decomposition rates achieved with Tween 80 modified nZVI particles were significantly higher compared to the non-stabilized nZVI particles prepared via the borohydride reduction method.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DJ - Pollution and water control
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemical Engineering Journal
ISSN
1385-8947
e-ISSN
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Volume of the periodical
262
Issue of the periodical within the volume
FEB
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
813-822
UT code for WoS article
000347577700089
EID of the result in the Scopus database
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