Adsorption nickel

An analysis of the thermodynamic stability models of various nickel minerals and solution species indicates that nickel ferrite is the solid species that will most likely precipitate in soils (Sadiq and Enfield 1984a). Experiments on 21 mineral soils supported its formation in soil suspensions following nickel adsorption (Sadiq and Enfield 1984b). The formation of nickel aluminate, phosphate, or silicate was not significant. Ni and Ni(OHX are major components of the soil solution in alkaline soils. In acid soils, the predominant solution species will probably be NE, NiS04°, and NiHP04° (Sadiq and Enfield 1984a). 

Abia, A.A. and Asuquo, E.D. 2006. Lead and nickel adsorption kinetics from aqneons metal solntions nsing chemically modified and unmodified agricultural adsorbents. African Journal of Biotechnology, 5(16) 1475-82. 

Nickel. Adsorption heats of hydrogen on an evaporated nickel film as measured by Beeck (28) and on reduced nickel found by Eucken (18) and... 

The susceptibility of solid surfaces to contamination often results in a requirement for an ultrahigh vacuum (UHV) chamber for preparation and observation of particular samples. For many materials, including metals such as platinum and nickel, adsorption of hydrocarbons and chemisorption of oxygen are quite fast at atmospheric pressure, and the surface must be isolated in UHV to prevent rapid degradation. In addition, a sample in UHV may be subjected to surface analytical techniques such as X-ray photoelectron and Auger spectroscopy to verify or corroborate Raman results. As a result, much of the early and well-characterized surface Raman experiments were carried out in UHV chambers operating below 10 torr (12). 

Bryce, A. L., Komicker, W. A., and Elzerman, A. W. (1994). Nickel adsorption to hydrous ferric oxide in the presence of EDTA effects of component addition sequence. Environ. Sci. Technol. 28, 2353-2359. 

Green-Pedersen, H., Jensen, B.T., and Pind, N., Nickel adsorption on MnOj, l c(OI I), montmorillonite, humic acid and calcite A comparative study, Environ. 

Fig. 3. Molecular (left) and acetone (right) TPD spectra from 0.5, 2.0, and 4.0 L of 2-propyl iodide adsorbed on Ni(lOO) pretreated with a fixed 3.0 L oxygen dose at 300 K. The results from this figure indicate that acetone production starts at the point where the nickel adsorption sites become saturated, suggesting that the proximity of alkyl and oxygen groups on the surface is a requisite for partial oxidation reactions.

Raney Nickel Adsorption. Raney nickel can adsorb selenium and certain other elements from solution. It can be separated by filtration,... 

Nickel Adsorption onto Silica and Goethite. Figure 4 contains adsorption isotherms for nickel onto -Si02 and a-FeOOH as compared with precipitation which occurs in the absence of oxide surfaces. The lines in Figure 4, as with all figures in this chapter showing sorptive behavior, are predicted using the James and Healy model in conjunction... 

Hydrocarbon Catalysis on Metals. The ReaxFF force-field can model catalytic properties of metal clusters toward C-H and C-C bond activation. This is exemplified by the work of Mueller, van Duin, and Goddard, in which the authors developed a Ni/C/H potential by parameterizing the ReaxFF force-field to reproduce a training set populated with DFT results for hydrocarbon-nickel adsorption energies, activation barriers, and bulk... 

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