Nickel in water

Sunderman et al. (1989b) have developed a model to predict nickel absorption, serum levels, and excretion following oral exposure to nickel in water and food. The model was developed based on two experiments in humans in which serum nickel levels and urinary and fecal excretion of nickel... 

In other papers by the same group, the effects of sulfur adsorbed or segregated on the Ni surface on corrosion or passivation were described, including the sulfur-induced enhancement of dissolution and the blocking of passivation. It was shown how the conditions of stability of adsorbed sulfur monolayers could be predicted on thermodynamical grounds and this was illustrated by a potential-pH diagram for adsorbed sulfur on nickel in water at 25 °C. (See Refs. 22, 25-29 and papers cited therein.)... 

High concentrations of nickel may occur in groundwater in areas with mafic or ultra-mafic rocks. Concentrations of nickel in water from natural occurrences are only likely to be of health concern in environments where pH is less than 4.5 or where groundwater pumping has introduced oxygen into an anaerobic aquifer. 

Tables 7.9 and 7.10 show the results from minteqa2. The model predicts that the dominant aqueous species for uranium and nickel in water are carbonate complexes. A significant proportion of sorption sites on the ferric oxides are occupied by sulfate ions, which results in fewer sorption sites available for metals and radionuclides.

Chemical and physical degradation of rocks and soils, atmospheric deposition of nickel-containing particulates, and discharges of industrial and municipal wastes release nickel into ambient waters. Nickel enters natural waterways from wastewater because it is poorly removed by treatment processes. The main anthropogenic sources of nickel in water are primary nickel production, metallurgical processes, combustion and incineration of fossil fuels, and chemical and... 

Catalytic reductions of substituted pyridinecarboxylic acids continue to play an important role in some syntheses of pyridoxol. Thus 4-carbethoxy-6-chloro-5-cyano-2-methyl-3-nitropyridine (X-132) is reduced over Raney Nickel in water to 3-amino-5-aminomethyl-4-carboxy-2-methylpyridine-4,5-lactam (X-133). - ... 

Preparation by hydrogenation of 4,4 -dihyd-roxy-3,3 -di-nitrobenzophenone in the presence of Raney nickel in water at 85-90° for 1 h under 100 atmospheres (69%) [1071]. 

Prolonged treatment with Raney nickel in water causes methyl a-L-arablnopyranoslde to be converted appreciably into methyl B-D-xylo-... 

Park, C. J., and Yim, S. A. (1999). Determination of nickel in water samples by isotope dilution inductively coupled plasma mass spectrometry with sample introduction by carbonyl vapor generotion.J. Anal. At. Spectrom. 14(7), 1061. 

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