Plant nickel

Norilsk Nickel Plant, Krasnoyarsk Region, Russia... 

At the conclusion of the paving work at Corpus Christi, two electrolytic cells were cast of sulfur concrete for use in the zinc refinery. Subsequent to the work at Corpus Christi, a sulfur concrete floor was applied in the nickel plant at the Asarco Amarillo copper refinery. An isolating barrier of bitu-mastic material was mopped on the concrete before the sulfur concrete pour. This floor, a substantially smaller area, was overlaid on a damaged existing floor. Similar techniques to those described were used in mixing and placement. 

L. G. Nickell, Plant Growth Regulators, Springer-Verlag, New York 1982, p. 173. 

Copper, Manganese, Nickel Plants — Flow injection on-line sorption preconcentration in a reactor, electrothermal [84]... 

Hannah Nickel OR Pact Unknom At one tins, burned tlrea for 2-3 years In nickel caldnere. Prlnary nickel plant producing nickel natal abandoned tire burning and cloaad plant new owner has opened plant, but has no plana to burn tiros. Reference 4... 

Hyperaccumulators of Ni ( nickel plants ) are distributed throughout the world but only in regions that have not previously been glaciated. The main centres of distribution are shown in Fig. 4-2. The presence of these plants only in non-glaciated regions is probably a temporal factor. Presumably plant evolution and adaptation to the hostile environment of nickel-rich soils is a process considerably longer than the 10000 years that have elapsed since the last period of glaciation. 

Nickel plants are confined to eight major regions as shown in Fig. 4-2 New Caledonia, Australia, Southern Europe and Asia Minor, The Malay Archipelago, Cuba, Western United States, Southern Africa, and Central Brazil. Some of these regions will be discussed below, but the reader is referred to Baker and Brooks (1989) for a more complete description and discussion. 

Until recently, there had been no record of nickel plants from South America. However, Brooks et al. (1990) have now identified 12 hyperaccumulators from ultramafic soils in Goias State. Among them is a Jatropha sp. (Euphorbiaceae) with a creamy latex containing 1.35% Ni on a dry weight basis. This is analogous to Sebertia acuminata from New Caledonia. 

Hyperaccumulation of metallic elements in plants as reviewed above, is likely to draw increasing attention from scientists throughout the world for the reasons outlined in the introduction to this chapter. Studies on nickel plants could well involve scientists from such diverse fields as ecology, biogeography, mineral exploration, evolutionary biology, taxonomy, physiology, phytochemistry, and even archaeology (phyto-... 

For the recovery of Ni2+ from the waste liquors (WL) of the nickel plant located in Nicaro, Cuba, the following methodology was proposed [5,37,60] (see Figure 7.14) carbonate-ammonium liquors (fresh liquors [FL]) are used for the exchange of the natural zeolite to the ammonium form (first cycle), and for the activation of the exhausted natural zeolite after the removal of nickel from the WL previously passed through the zeolite column. The exchanged nickel is recovered and the obtained NH4-zeolite is heated to get H-zeolite, thereby recovering the ammonium. The process is thus repeated cyclically. 

Hydroxypyrene was measured in the urine, and PAH-DNA adducts were measured in white blood cells to demonstrate their relationship to the exposure. Results from these workers were compared to two reference control groups research and development (R D) workers and nickel refinery workers. Mean values of PAH-DNA adducts in the white blood cells from randomly selected participants in the three groups were only marginally different, with the exception of two smokers in the electrode plant, who had the highest levels. Mean PAH-DNA adduct levels were 10.9 adducts per 108 nucleotides for the electrode workers, 10.8 adducts per 10 nucleotides for the R D personnel, and 10.0 adducts per 10 nucleotides for nickel plant workers not occupationally exposed to PAHs. No correlation was found between PAH-DNA adducts and 1-hydroxypyrene in the urine. 

After the plastic has been removed, the batteries are charged into a cadmium furnace and the cadmium is distilled off at high temperatures and collected. Negative cadmium plates from industrial batteries are also charged into the cadmium furnace for distillation of the cadmium. Carbon is added as a reductant. The charge is heated and the cadmium distilled, then collected in a water bath. The final cadmium product is in shot form. The cadmium shot is drummed, weighed, assayed, and shipped to the customer. The residue from the cadmium furnace, mostly iron and nickel, is shredded and fed to the nickel plant for nickel and iron recovery. 

Roustan, J.P., Latche, A. Fallot, J. (1989). Stimulation of Daucus carota somatic embryogenesis by inhibitors of ethylene synthesis cobalt and nickel. Plant Cell Reports, 8 182-185... 

In chloride electrolyte systems, titanium anodes with iridium or ruthenium compound catalytic coatings are used to allow evolution of chlorine at the anodes. For these anodes, each short circuit from nodules and dendrites not only destroys the local active coating and its catalytic effect but also completely destroys any ability for that area to oxidize chloride to chlorine. Shorts thereby reduce the life of these anodes which is important since these anodes are relatively expensive compared to lead alloy anodes normally utilized in sulphate based systems. The use of such catalytic anodes is expanding with some sulphate electrolyte copper electrowinning plants now moving to a form of these titanium catalytic anodes a nickel plant has these anodes for mixed chloride/sulphate duty and there appears scope for further expansion into nickel sulphate electrowinning. 

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