نتایج جستجو برای: hydrometallurgical method

تعداد نتایج: 1630455  

Journal: :Metals 2021

Printed circuit boards (PCBs) can be an important source of non-ferrous metals (Al, Sn, Zn, and Ni) precious (Au, Ag, Cu, Pd). With the continuous increase in demand for due to depletion ores, recycling this waste is becoming attractive alternative. The printed circuits also contain hazardous metals, such as Pb, Hg, As, Cd. Due huge amount e-waste, processing metal recovery proper handling subs...

Journal: :Minerals 2021

By developing technologies, spent lithium-ion batteries (LIBs) are considered a great source of nickel-cobalt ions to fabricate metal sulfide nanoparticles. However, the presence unnecessary such as manganese and lithium may hamper formation pure nanostructures where utilization proper ligand(s) can be very critical. For this reason, present study initially introduces promising cost-effective a...

Journal: :Chemical Engineering Journal 2023

One way to overcome the complex problem of increasing demand for metals coupled with rapid depletion high-grade raw materials is boost research into innovative methods metal recovery. Electrochemical recovery production has already gained ground in electrowinning and electrorefining Cu, Zn, Au, example, from highly concentrated purified hydrometallurgical solutions. Since 2015, an electrochemic...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1392

in the area of vocabulary teaching and learning although much research has been done, only some of it has led to effective techniques of vocabulary teaching and many language learners still have problem learning vocabulary. the urge behind this study was to investigate three methods of teaching words. the first one was teaching words in context based on a traditional method of teaching that is,...

Journal: :Modeling, Identification and Control: A Norwegian Research Bulletin 2002

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