نتایج جستجو برای: trace and rare earth elements
تعداد نتایج: 16915845 فیلتر نتایج به سال:
Because of their unique properties, rare earth elements (REEs), comprising the lanthanide plus Sc and Y, have a variety integral applications in modern electronic equipment. Consequently, it has been suggested that REEs may act as contaminants tracers for recycled electrical plastics consumer goods. In this study, determined range different polymeric makeup (n = 31), purchased new societal circ...
The dissolution rates of rare earth oxides and two types of rare earth containing functional materials into water, saline solution, and Gamble's fluid were measured in order to evaluate the biological effects of rare earth-containing functional materials. The tested materials were yttrium, lanthanum, cerium and neodymium oxides, and neodymium-boron-iron magnet alloy (NdBFe) and lanthanum-mish-m...
Background and Objectives: Rare earth elements (REEs) are examples of emerging contaminants that have recently been increasingly spread to the environment through the extensive use in modern commodities, medical facilities, petroleum refining, mining, chemical fertilizers, electronic wastes and recycling plants. However, these elements are considered due to their potential human and ecological ...
Rare earth (RE) magnets have become virtually indispensible in a wide variety of industries such as aerospace, automotive, electronics, medical, and military. RE elements are essential ingredients in these high performance magnets based on intermetallic compounds RECo5, RE2TM17 (TM: transition metal), and RE2TM14B. Rare earth magnets are known for their superior magnetic properties—high inducti...
Khut Copper deposit, located in west of Yazd, is one of the most important skarn deposits in Taft mining area that situated in the middle part of the Urumieh-Dokhtar magmatic belt. Intrusion of Khut granodioritic stock into carbonate component of the Nayband Formation has led to the formation of Cu skarn deposit and different skarn zones. Mass changes has led to mineralogical changes in the dif...
The Zailic gold-bearing veins are located in the Arasbaran metallogenic zone, east of Ahar, East-Azarbaidjan Province. The most important lithologic units in this area are andesitic and trachy-andesitic tuffs and lavas of Upper Eocene age hosting vein-type gold mineralization. Theses rocks have suffered silicic, argillic, phyllic, and propylitic alterations brought about by hydrothermal fluids....
Rare studies have been performed to trace the mineral elements in Dendrobium officinale. In this study, we aim to trace the mineral elements in D. officinale collected from ten geographical locations in China. ICP-MS system was used for simultaneous determination of mineral elements. Principal component analysis was performed using the obtained data in the quantification of mineral contents. Cl...
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