scholarly journals Contamination Level of Chromium, Iron, Nickel, Lead and Cobalt in Soil from an Agricultural area of Urmar Bala, Peshawar Pakistan

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Fazal Wahid ◽  
Arif Ullah Shah ◽  
Muhammad Rahim ◽  
Fazal Dad ◽  
Nadir Khan ◽  
...  
Keyword(s):  
Agricultural Area ◽  
Contamination Level ◽  
Iron Nickel ◽  
Nickel Lead

A Technique for Brazing Aluminum Nitride Substrates

1989 ◽  
Vol 167 ◽  
Author(s):  
M. Grant Norton ◽  
Jacek M. Kajda ◽  
Brian C. H. Steele
Keyword(s):  
Aluminum Nitride ◽  
High Strength ◽  
Lead Frame ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
X Ray ◽  
Iron Nickel ◽  
In Situ Decomposition ◽  
Nickel Lead

AbstractA technique for brazing aluminum nitride (AIN) using conventional (non-active) brazing alloys has been investigated. The process involves the in-situ decomposition of a metal hydride. This process alters the surface chemistry of the substrate and improves the wettability of the molten braze. The development of high strength bonding between braze and ceramic results. The ceramic-braze interface was studied using scanning electron microscopy (SEM). The nature of the interfacial reactions and the reaction products have been identified using x-ray diffraction (XRD). The progress of the reaction has been followed using differential thermal analysis (DTA).The experimental results have been correlated with thermodynamic predictions of the reaction process. In addition to joining ceramic to ceramic, braze joints of AIN to a low expansion iron-nickel lead frame alloy were made.

Results of Research into the Content of Rare Earth Materials in Man-Made Phosphogypsum Deposits

2020 ◽  
Vol 844 ◽  
pp. 77-87 ◽  
Author(s):  
Zynovii Malanchuk ◽  
Viktor Moshynskyi ◽  
Yevhenii Malanchuk ◽  
Valerii Korniienko ◽  
Mykola Koziar
Keyword(s):  
Trace Elements ◽  
Rare Earth ◽  
Water Saturation ◽  
Pore Space ◽  
Economic Value ◽  
Environmental Safety ◽  
Manganese Zinc ◽  
Environmentally Safe ◽  
Iron Nickel ◽  
Nickel Lead

According to the materials of the Rivne exploration expedition in Rivne region more than 15.3 million tons of phosphogypsum materials in rock dumps are stored. For further use and recycling of waste, it is necessary to evaluate the content of rare earth elements in phosphogypsum, which are of considerable economic value. The possible recycling of this production will increase the level of environmental safety through the use of more reliable engineering systems for the environmentally safe storage of phosphogypsum rock dumps. The migration of phosphorus, fluorine, sulfur, copper, chromium, manganese, zinc, lead, cadmium, iron, nickel and cobalt along the profile of the artificial ground cross-section was investigated experimentally. The results of studies confirmed the increased accumulation of metal in the phosphogypsum rock dumps. Analyzing the content of nickel, lead, sulfur, manganese, cobalt and zinc in experimental samples, we observe the distribution pattern, the content of which in samples is 2 – 3 times higher than the content of trace elements of the above-mentioned groundwater deposits. The results of the sorption and desorption of nickel, lead, sulfur, manganese, cobalt and zinc indicate that the rock is not an obstacle to the migration of trace elements and its aggregates in the rock and is observed only in the zone of full water saturation due to the filling of pore space. The conducted researches established the presence of phosphogypsum in man-made wastes of nickel, lead, cobalt, zinc, iron with a percentage content up to 1% per ton of rock waste.

scholarly journals Preparation of Soft Magnetic Fe-Ni-Pb-B Alloy Nanoparticles by Room Temperature Solid-Solid Reaction

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Guo-Qing Zhong ◽  
Qin Zhong
Keyword(s):  
Room Temperature ◽  
Nickel Chloride ◽  
Metal Salts ◽  
Spherical Particles ◽  
Alloy Nanoparticles ◽  
Soft Magnetic ◽  
Solid Reaction ◽  
Potassium Borohydride ◽  
Iron Nickel ◽  
Nickel Lead

The Fe-Ni-Pb-B alloy nanoparticles was prepared by a solid-solid chemical reaction of ferric trichloride, nickel chloride, lead acetate, and potassium borohydride powders at room temperature. The research results of the ICP and thermal analysis indicate that the resultants are composed of iron, nickel, lead, boron, and PVP, and the component of the alloy is connected with the mole ratio of potassium borohydride and the metal salts. The TEM images show that the resultants are ultrafine and spherical particles, and the particle size is about a diameter of 25 nm. The largest saturation magnetization value of the 21.18 emu g−1is obtained in the Fe-Ni-Pb-B alloy. The mechanism of the preparation reaction for the Fe-Ni-Pb-B multicomponent alloys is discussed.

Cobalt(III) Hexamethylenedithiocarbamate as a New Collector for Flotation Preconcentration of Iron, Nickel, Lead, and Zinc Prior to ETAAS

2004 ◽  
Vol 37 (4) ◽  
pp. 695-710 ◽  
Author(s):  
Umit Ay ◽  
Katarina Čundeva ◽  
Göksel Akçin ◽  
Trajče Stafilov ◽  
Vesna Paneva Zajkova ◽  
...  
Keyword(s):  
Lead And Zinc ◽  
Iron Nickel ◽  
Nickel Lead

Synchronous Determination of Copper, Iron, Nickel, Lead, Cadmium and Chromium in Electroplating Wastewater by ICP-AES

2014 ◽  
Vol 1033-1034 ◽  
pp. 558-562 ◽  
Author(s):  
Wei Qu ◽  
Cheng Ying Zhou ◽  
Shuang Liu
Keyword(s):  
Detection Limit ◽  
High Ratio ◽  
Spectral Lines ◽  
National Standard ◽  
Electroplating Wastewater ◽  
Relative Standard ◽  
Iron Nickel ◽  
Nickel Lead ◽  
Determination Of Copper

A method was proposed for the determination of copper, iron, nickel, lead, cadmium and chromium in electroplating wastewater by ICP-AES. Working conditions and selection of spectral lines were optimized. The mixed and single standard for 6 elements were analyzed, spectrum with high sensitivity, low spectral interference, high ratio of signal with background, low detection limit were selected. The detection limit was 0.002, 0.003, 0002, 0.008, 0.002, 0.007mg/L. The effects of inhalation rate and the spectral intensity in nitric acid, hydrochloric acid, perchloric acid and sulfuric acid solution were tested. Nitrate acid with low viscosity, low surface tension and high atomization efficiency was selected. The accuracy and precision were tested, the relative error was less than 5.2%, relative standard deviation was less than 2.4%.It was accord with national standard. It proved that the determination of copper, iron, nickel, lead, cadmium and chromium in electroplating wastewater by ICP-AES was feasible.

Fe-Ni-Pb-Zn (Iron-Nickel-Lead-Zinc)

2003 ◽  
Vol 24 (6) ◽  
pp. 568-568
Author(s):  
V. Raghavan
Keyword(s):  
Iron Nickel ◽  
Lead Zinc ◽  
Nickel Lead
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