نتایج جستجو برای: hydrometallurgical method
تعداد نتایج: 1630455 فیلتر نتایج به سال:
Abstract Szklary Massif is situated about 60 km from Wrocław (southwestern Poland) and around 7 Ząbkowice Śląskie. The history of raw materials in this region started the fifteenth century with discovery precious minerals like chrysoprase, chalcedony, opal. exploitation nickel ore nineteenth was conducted few stops until 1983. remaining 17.21 mln mg 125,000 might be a chance to satisfy rising d...
The aim of this study was to investigate the synthesis iron oxide pigments from IOT. sample IOT obtained through mining activity Quadrilátero Ferrífero in state Minas Gerais, Brazil. procedure carried out by hot acid leaching with hydrochloric (HCl) which allowed recovery about 95% a liquor. iron-based pigments—red (IBP_R), black (IBP_B), and yellow (IBP_Y)—were synthetised liquor selective pre...
A hydrometallurgical process for recycling spent Zn-MnO2 batteries was developed, involving leaching with sulfuric acid, purification by precipitation and metals separation for further recovery. Leaching of zinc oxide was easily attained while for manganese oxide was rather difficult depending on temperature and acid concentration. At 90oC and with the liquid/solid ratio of 20 L/kg, more than 9...
In recent years, the demand for copper and nickel has risen world-wide due to their use in printed circuit boards, batteries, application in marine alloys (due to excellent resistance to corrosion by seawater), and a wide range applications in day-to-day life (Doebrich, 2009). Increasing demand for these metals is leading to rapid depletion of high-grade resources. Alternative sources, such as ...
in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...
abstract objectives gradual increase length and complexity of utterance (gilcu) therapy method is a form of operant conditioning. this type of treatment is very precise and controlled that is done in 54 steps in 3 speech situations consisted of monologue, reading and conversation. this study aimed to examine the effects of gilcu treatment method on reduction of speech dysfluency of school-age...
Introduction: Benzene, Toluene, Ethylbenzene and Xylenes (BTEX) are important parts of the volatile organic compounds (VOCs) family, which are widely used in many industries. These have been classified as carcinogenic compounds and the neurotoxic effects of BTEX have been reported; so, a screening evaluation of workplace air quality for determining BTEX may seem necessary. Methods: In order ...
Vanadium containing sludge is a by-product of vanadium pentoxide obtained by hydrometallurgical methods from slag that can be estimated as promising technogeneous raw material for production. The phase analysis vanadium-containing the X-ray diffraction method showed it contains in spinel form (FeO∙V2O3). various oxidation roasting treatment were studied increasing extraction into solution. It m...
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