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Nickel

About: Nickel is a research topic. Over the lifetime, 79308 publications have been published within this topic receiving 1210058 citations. The topic is also known as: Ni & element 28.


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Journal ArticleDOI
TL;DR: Granular activated carbon produced from palm kernel shell was used as adsorbent to remove copper, nickel and lead ions from a synthesized industrial wastewater as mentioned in this paper, which fitted the equilibrium adsorption process more than Freundlich model for the three metals.
Abstract: Granular activated carbon produced from palm kernel shell was used as adsorbent to remove copper, nickel and lead ions from a synthesized industrial wastewater.Laboratory experimental investigation was carried out to identify the effect of pH and contact time on adsorption of lead, copper and nickel from the mixed metals solution. Equilibrium adsorption experiments at ambient room temperature were carried out and fitted to Langmuir and Freundlich models. Results showed that pH 5 was the most suitable, while the maximum adsorbent capacity was at a dosage of 1 g/L, recording a sorption capacity of 1.337 mg/g for lead, 1.581 mg/g for copper and 0.130 mg/g for nickel. The percentage metal removal approached equilibrium within 30 min for lead, 75 min for copper and nickel, with lead recording 100 %, copper 97 % and nickel 55 % removal, having a trend of Pb 2+ values of 0.977, 0.817 and 0.978 for copper, nickel and lead respectively, which fitted the equilibrium adsorption process more than Freundlich model for the three metals.

258 citations

Journal ArticleDOI
TL;DR: In this article, the capacity of raw rice bran for chromium and nickel removal from aqueous solutions was investigated using the Langmuir and Freundlich adsorption models, which are in common use for describing sorption equilibrium for wastewater treatment applications.

258 citations

Journal ArticleDOI
TL;DR: In this article, the deactivation of Ni/SiO2 catalysts under the conditions of carbon dioxide reforming of methane was studied as a function of different operating parameters, including temperature programmed hydrogenation, magnetic measurements, transmission electron microscopy, and thermogravimetric analysis.

258 citations

Journal ArticleDOI
TL;DR: In this article, the mixed transition metal layered compound, LiNi0.4Mn 0.4Co0.2O2, with the α-NaFeO2 layer structure has been synthesized and characterized.
Abstract: The mixed transition metal layered compound, LiNi0.4Mn0.4Co0.2O2, with the α-NaFeO2 layer structure has been synthesized and characterized. The optimum temperature of synthesis was found to be 800–900 °C. Rietveld refinement showed that cobalt suppresses transition metal ion migration into the Li sites whereas nickel promotes the migration. XPS analysis shows that the Co and about 20% of the Ni and Mn are in the 3+ oxidation state, while 80% of the Ni and Mn are in the 2+ and 4+ oxidation states, respectively. LiNi0.4Mn0.4Co0.2O2 shows Curie–Weiss paramagnetic behavior above 150 K, and the value of the Curie constant is consistent with the above oxidation states. In lithium electrochemical cells the composition LiNi0.4Mn0.4Co0.2O2 gave the highest reversible capacity among the studied compositions. It shows excellent rate capability, giving reversible capacities ranging from 180 to 155 mA h g−1 at current densities from 0.1 to 2.0 mA cm−2.

257 citations

Journal ArticleDOI
TL;DR: The results from these four sites suggest that the pore water profiles of these metals are controlled by processes involving the major oxidants (O2, NO3−, Mn and Fe oxides) as discussed by the authors.

257 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20233,184
20226,229
20211,949
20202,693
20193,234
20183,107