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  • Characterization and Growth Mechanism of Nickel Nanowires

    A decrease in the nickel formate concentration in the solution results in a decrease in the diameters of the nanowires. Thus, at nickel to ethylene glycol ratios of 1 : 20, 1 : 100, 1 : 400, and 1 : 1000, the average diameters of the nanowires are 300, 150, 100, and 50 nm, respectively, while their lengths almost do not change, remaining in the

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  • 11.4: Dependence of Cell Potential on Concentration

    A You have constructed a concentration cell, with one compartment containing a 1.0 M solution of \\ce{Pb^{2+}}\ and the other containing a dilute solution of Pb 2 + in 1.0 M Na 2 SO 4. As for any concentration cell, the voltage between the two compartments can

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  • EP2606163A1NICKEL pH ADJUSTMENT METHOD AND

    An electrolytic cell for adjusting pH and replenishing nickel in a nickel plating solution of a nickel plating bath and a method of using the same is disclosed. The electrolytic cell comprises an inlet for receiving nickel plating solution from the nickel plating bath; a cooled cathode connected to a first bus bar connected, to a negative terminal of a power supply: a plurality of nickel

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  • Nickel: a review of occurrence, uses, emissions, and

    In this study, nickel in the air, stream waters, soils, and lake and river sediments have been examined. It is noted that the background concentration of nickel in the air is about 0.5 ng·m3, and nickel in stream water varies from 0.14 to 4.0 µg·L1. There was no significant change of nickel concentration in arable lands between 1974 and 1987.

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  • Nickel CompoundsUS EPA

    Soluble nickel compounds are more toxic to the respiratory tract than less soluble compounds. 6 EPA has not established a Reference Concentration RfC for nickel. 2,3,4,5 The Reference Dose RfD for nickel soluble salts is 0.02 milligrams per kilogram body weight per day mg/kg/d based on decreased body and organ weights in rats.

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  • The Risk Assessment Information System

    Feb 13, 1998· Nickel subsulfide 1.8 mg nickel/m 3 decreased activity levels of natural killer cells while both nickel oxide 0.47, 2.0, and 7.9 mg nickel/m 3 and nickel subsulfate 0.45 and 1.8 mg nickel/m 3 inhibited phagocytic ability of alveolar macrophages. In studies with mice and rats, Smialowicz et al. 1984, 1985, 1987 found that nickel chloride

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  • II. Electrodeposition/removal of nickel in a spouted

    Aug 17, 2011· As shown, the corrosion rates under these conditions exhibit close to zeroth order behavior with respect to nickel ion concentration, and increase monotonically with decreasing pH at 35°C. The measured nickel corrosion rates i.e., the slopes of the linear fits in Figure 3 , as well as fit corrosion rates, determined as described above

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  • 11.4: Dependence of Cell Potential on Concentration

    A You have constructed a concentration cell, with one compartment containing a 1.0 M solution of \\ce{Pb^{2+}}\ and the other containing a dilute solution of Pb 2 + in 1.0 M Na 2 SO 4. As for any concentration cell, the voltage between the two compartments can

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  • Nickel: a review of occurrence, uses, emissions, and

    In this study, nickel in the air, stream waters, soils, and lake and river sediments have been examined. It is noted that the background concentration of nickel in the air is about 0.5 ng·m3, and nickel in stream water varies from 0.14 to 4.0 µg·L1. There was no significant change of nickel concentration in arable lands between 1974 and 1987.

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  • Nitinol biocompatibilityWikipedia

    The decrease in nickel concentration in the surface layer of nitinol is correlated with a greater corrosion resistance. A potentiodynamic test is commonly employed to measure a materials resistance to corrosion. This test determines the electrical potential at which a material begins to corrode.

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  • PDF THE STUDY OF CHELATING RESIN DOWEX XUS 43605 FOR

    The main problem of nickel limonite is high concentration of iron, which decrease metals recovery hydrometallurgical process efficiency.flow rate and nickel concentration are applied. Removal

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  • Nickel concentration dependent structural and optical

    XRD pattern depicts multiphase nature of NiDLC film. Incorporation of Ni nanoparticles in DLC matrix has been confirmed by TEM. Interestingly optical bandgap energy decreases from 2.31 to 1.58 eV with decrease in nickel content in the electrolytic bath. Simultaneously Urbach energy exhibits an increasing trend from 1.972 to 2.374 eV.

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  • link.springer.com

    A new biomassbased carbonaceous adsorbent has been developed from Pongamia pinnata and its effect upon nickel modification and adsorptioncoupled ultrasonication was investigated. Adsorption experiment of the model oil constituting 50 ppm dibenzothiophene in cyclohexane showed the maximum capacity as 8.11, 13.36, and 17.15 mg·g1 for the commercial carbon DARCO, virgin bioadsorbent

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  • HS1191/HS1191: Nickel Nutrition in Plants

    Nickel Concentration in Soils. Nickel comprises approximately 3% of the earth's crust composition and is the twentyfourth most abundant element. Total Ni concentration commonly ranges from 5 to 500 mg kg1, with an average of 50 mg kg1 in soils.

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  • PlantsFree FullTextNickel Toxicity Induced Changes

    Both shoot and root Zn concentration decreased significantly at 20 and 40 mg L 1 as compared with 0 mg L 1 Ni level, whereas its root toshoot translocation increased. Both shoot and root Cu concentration decreased significantly p < 0.05 by increasing Ni 20 and 40 mg L 1 levels in both maize hybrids Figure 5D. The maize hybrids

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  • link.springer.com

    A new biomassbased carbonaceous adsorbent has been developed from Pongamia pinnata and its effect upon nickel modification and adsorptioncoupled ultrasonication was investigated. Adsorption experiment of the model oil constituting 50 ppm dibenzothiophene in cyclohexane showed the maximum capacity as 8.11, 13.36, and 17.15 mg·g1 for the commercial carbon DARCO, virgin bioadsorbent

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  • METHOD FOR NICKEL CONCENTRATION PROCESSING OF

    1. A method for nickel concentration processing of a saprolite ore, characterized by comprising the steps of the following 1 to 4. 1 a saprolite ore is subjected to crushing processing to adjust the ore particle size to a size passing a sieve with an mesh opening of 50 mm. 2 a crushed ore obtained in the step of the above 1 is subjected to drytype grinding processing of the surface

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  • Effect of nickel on the comparative performance of inverse

    A simulated wastewater with an inlet NO 3 N concentration of 225 mg/L and a decreasing concentration of biogenic sulphur bioS from 1.5 to 0.375 g/L was used. Both reactors were operated at a retention time HRT of 48 h for 140 days and at an HRT of 42 h for the following 68 days.

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  • Nickel and Inorganic Nickel Compounds

    Aug 12, 2008· Nickel and Inorganic Nickel Compounds CAS Registry Numbers: Nickel: 744002010 benchmark concentration lower corresponding to the 10% response level20 Provocation concentration producing a 20% decrease in Forced Expiratory Volume in

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  • Nickel in soils: A review of its distribution and impacts

    United States reported Nickel concentration range of less than 5 to 700 ppm, with a geometric mean of 13 ± 2.31 ppm. Industrial waste materials, lime, fertilizer and sewageWith decreasing pH, the solubility and mobility of nickel increases, hence, soil pH is the major factor controlling nickel solubility, mobility and sorption, while clay

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  • Water Quality Criteria for Nickel 1986

    and hydroxide precipitates of nickel, that might exist in an effluent and dissolve when the effluent is diluted with receiving water. If desired, dilution of effluent with receiving water before measurement of acidsoluble nickel might be used to determine whether the receiving water can decrease the concentration of acidsoluble nickel because

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  • Nickel chlorideNiCl2PubChem

    Nickel Chloride is a green or yellow colored, crystalline inorganic compound that produces toxic gases upon heating. Nickel chloride is used in electroplating, in nickel catalysts and to absorb ammonia in industrial gas masks. Exposure to this substance can cause severe dermatitis, skin and asthmalike allergies and affects the lungs, kidneys, gastrointestinal tract and neurological system.

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  • EP2606163A1NICKEL pH ADJUSTMENT METHOD AND

    An electrolytic cell for adjusting pH and replenishing nickel in a nickel plating solution of a nickel plating bath and a method of using the same is disclosed. The electrolytic cell comprises an inlet for receiving nickel plating solution from the nickel plating bath; a cooled cathode connected to a first bus bar connected, to a negative terminal of a power supply: a plurality of nickel

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  • nickel concentration decreasingzsz3kielce.pl

    Abstract The effect of field aging on nickel Ni concentration in soil solutions was studied on three soils, with pH 4.5, 6.1, and 7.6, that were spiked with Ni and aged outdoors for 5, 10, and 15 months. Field aging resulted in a minor decrease in total Ni content and a dramatic decrease in Ni concentration

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  • Chapter 6.10 NickelWorld Health Organization

    The highest concentration of nickel was found in the smallest particles emitted from a coalfired plant 20. Particles with an MMD of 0.651.1 µm contained nickel at a concentration of 1600 mg/kg, while particles of 4.711 µm contained 400 mg/kg. Nickelcontaining particles released from oil combustion California, urban area are in the

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  • Nickel CompoundsUS EPA

    Soluble nickel compounds are more toxic to the respiratory tract than less soluble compounds. 6 EPA has not established a Reference Concentration RfC for nickel. 2,3,4,5 The Reference Dose RfD for nickel soluble salts is 0.02 milligrams per kilogram body weight per day mg/kg/d based on decreased body and organ weights in rats.

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  • Removal of nickel from aqueous solutions using Saudi

    concentration decreased nickel removal percentage due to the saturation of clay with nickel ions. Furthermore, the adsorption of nickel increases from 70 to 100% with an increase in solution pH from 2.0 to 9.0. The adsorption isotherm data were well fitted with

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  • Nickel Ni and waterLenntech

    When water with a 40 ppm nickel concentration is added these grains may die. Liming of the soil may rapidly decrease nickel uptake. On the other hand, high nickel concentrations may throng other heavy metals. Sludge containing more than 200 ppm nickel dry mass may not

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  • I1

    The nickel concentration of commercial acidtype pH 4 to 6 electroless nickel solutions lies within the range of 4.5 to 11 g/L 0.08 to 0.19M. Simple calculations based on the nickel concentration range and the preferred molar ratio of Ni''/H.POI yields a molar concentration range

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  • Removal of low concentrations of nickel ions in

    The low concentration of nickel in electroplating wastewater is difficult to treat to meet the discharge standard. In this study, a commercial cation exchange membrane was used to combine the electrodialysis on a titanium plate anode sintered rutheniumiridium and the electrodeposition on a stainless steel cathode to reduce the nickel concentration to less 0.1 mg L 1.

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  • Passivation of ZincNickel Surfaces: An optimal process

    During the acid attack of the passivation Eq. 1 slightly more zinc is dissolved than nickel leading to an increase of the nickel concentration within the zincnickel layer Table 2, Fig. 9. Fig. 9: Increase of nickel concentration in the layer and decrease of layer thickness during passivation

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  • Nickel and Inorganic Nickel Compounds

    Aug 12, 2008· Nickel and Inorganic Nickel Compounds CAS Registry Numbers: Nickel: 744002010 benchmark concentration lower corresponding to the 10% response level20 Provocation concentration producing a 20% decrease in Forced Expiratory Volume in

    Inquire Now
  • Nickel concentration dependent structural and optical

    XRD pattern depicts multiphase nature of NiDLC film. Incorporation of Ni nanoparticles in DLC matrix has been confirmed by TEM. Interestingly optical bandgap energy decreases from 2.31 to 1.58 eV with decrease in nickel content in the electrolytic bath. Simultaneously Urbach energy exhibits an increasing trend from 1.972 to 2.374 eV.

    Inquire Now
  • Chapter 6.10 NickelWorld Health Organization

    The highest concentration of nickel was found in the smallest particles emitted from a coalfired plant 20. Particles with an MMD of 0.651.1 µm contained nickel at a concentration of 1600 mg/kg, while particles of 4.711 µm contained 400 mg/kg. Nickelcontaining particles released from oil combustion California, urban area are in the

    Inquire Now
  • Water Quality Criteria for Nickel 1986

    and hydroxide precipitates of nickel, that might exist in an effluent and dissolve when the effluent is diluted with receiving water. If desired, dilution of effluent with receiving water before measurement of acidsoluble nickel might be used to determine whether the receiving water can decrease the concentration of acidsoluble nickel because

    Inquire Now
  • Nickel in soils: A review of its distribution and impacts

    United States reported Nickel concentration range of less than 5 to 700 ppm, with a geometric mean of 13 ± 2.31 ppm. Industrial waste materials, lime, fertilizer and sewageWith decreasing pH, the solubility and mobility of nickel increases, hence, soil pH is the major factor controlling nickel solubility, mobility and sorption, while clay

    Inquire Now
  • Effect of nickel concentration on tomato plant nutrition

    Nov 21, 2008· The presence of Ni in nutrient medium affected plant growth, decreasing dramatically dry matter yield compared to control plants. This plant reduction was likely due to the disturbances and imbalances of the different essential mineral elements. The general effect was a decrease in the absorption and accumulation of these nutrients.

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  • Effect of nickel concentration on tomato plant nutrition

    Apr 03, 2009· The presence of Ni in nutrient medium affected plant growth, decreasing dramatically dry matter yield compared to control plants. This plant reduction was likely due to the disturbances and imbalances of the different essential mineral elements. The general effect was a decrease in the absorption and accumulation of these nutrients.

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