By J. Lawrynowicz, J. Lodz
Textual content: English, French
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Additional resources for Analytic Functions, Blazejewko 1982
3 Speciﬁcally, these included enhancements to the mixing, nanoparticle recovery, and storage elements of the synthesis. 9 L) polyethylene containers ﬁtted with variable-speed, explosion-resistant mixers. No attempt was made to exclude air from the reaction mixture. The freshly prepared nZVI particles were allowed to settle for approximately one hour and were then harvested by vacuum ﬁltration. The harvested nanoparticles were washed with copious amounts of distilled water (> 100 mL/g), then by ethanol, purged with nitrogen, and refrigerated in a sealed polyethylene container under ethanol until needed.
It was found that the extent of reaction was greater than what could be accounted for by reaction only on the surfaces of Fe2 O3 ; this suggested that Fe2 O3 on the surface was regenerated. The apparent regeneration of Fe2 O3 on the surface of the particles suggested that coating other metal oxide nanoparticles with iron(III) oxide June 29, 2012 9:24 Environmental Applications of Nanomaterials: Synthesis, . . 12 O. B. Koper et al. b1291-ch01 might enable more complete utilization of the core metal oxide.
Paraoxon is an insecticide and is a suitable simulant for nerve warfare agents. 7 illustrates the rate of removal of paraoxon from a pentane solution over time employing various adsorbents. The removal was monitored using UV-Vis spectroscopy and reduction of the paraoxon (265–270 nm) peak was observed over time. A. A. A. A. 7. Rate of adsorption of paraoxon by various samples. June 29, 2012 9:24 Environmental Applications of Nanomaterials: Synthesis, . . 16 O. B. Koper et al. b1291-ch01 paraoxon while all the activated carbon and ion-exchange resin (IER) samples were signiﬁcantly less adsorptive and unable to adsorb paraoxon completely, even after 20 hours of exposure.
Analytic Functions, Blazejewko 1982 by J. Lawrynowicz, J. Lodz