The study aims at assessing the physicochemical properties, heavy metals, and aflatoxins content of crude palm groundnut oils produced sold in Adikpo, Wadata, Otukpa areas Benue state, Nigeria. Specific gravity, refractive index, acid value, saponification peroxide moisture content, smoke point are properties evaluated. metals analyzed include; Lead, Nickel, Copper, Iron, Arsenic, Iron. Total w...

Native nickel of composition Ni 96"3 ~, Fe 1"77 ~, and Co 0'69 ~ was found as tiny flakes up to o'75 mm across in a heavy mineral concentrate from stream sediments in the Jerry River, South Westland, New Zealand. The locality is approximately I3 km downstream from the original locality for awaruite (Ni~Fe), and it is shown that the nickel content of detrital grains increases with distance from ...

The processing of mined and beneficiated ores, concentrates or mattes to produce refined metallic products is an important step in the production of base metals such as zinc, copper and nickel. Despite increased recycling, as well as first tentative steps towards dematerialization of economic activity in industrialized countries, prospects are positive for continued growth in demand for these c...

Abstract To meet UN Sustainable Development goals, a clean‐energy transition with minimal ecological impact from its raw‐material supply chain is essential. Polymetallic nodules lying unattached on the abyssal seafloor of Pacific Ocean's Clarion Clipperton Zone contain four critical metals (nickel, cobalt, manganese, copper) in large quantities, and International Seabed Authority may soon enact...

The depleting and increasingly complex mineral resources bring challenges into the area of metal production, bringing new boundary conditions to smelting refining processes. Thermodynamics phases equilibria are key analysis pyrometallurgical processes, enabling descriptions their limiting conditions. raw material basis non-ferrous metals needs an effective control iron oxide fluxing due challen...

The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted nickel-enriched phase called matte, and further refined pure Ni products as well by-products, such cobalt (Co), copper (Cu) precious metals. However, the traditional smelting-matte refining process, whilst technologically robust, capital intensive suffers several environm...

this study sougth to the effect of occ pulp fractionation on produced paper strength properties improvement. using a pressure screen, occ pulp was devided to tow distinct fractions of accept ratio (short fibers) and reject ratio (long fibers) in accordance with optimum condition of fractionation based on the previous studies. in the next stage, long fiber stream was refined and recombined with ...

The study of a well-preserved crucible fragment from the Middle Kingdom Egyptian fortress in Buhen lower Nubia revealed unexpected presence numerous prills very arsenic- and nickel-rich copper alloy what looks like smelting slag. Based on optical scanning electron microscopy polished section, this paper discusses potential metallurgical process that was carried out type crucible. Strongly reduc...

The aim of this study was to measure the levels of nickel in the skin contaminant layer of workers involved in specific processes and tasks within the primary nickel production and primary nickel user industries. Dermal exposure samples were collected using moist wipes to recover surface contamination from defined areas of skin. These were analysed for soluble and insoluble nickel species. Pers...