Separation of copper and cobalt from pyrite leach solution by solvent extraction

Çokgör, Onur


Extraction of nickel from lateritic ores at atmospheric pressure with agitation leaching
Buyukakinci, E.; Topkaya, Yavuz Ali (2009-06-01)
Nontronitic and limonitic type laterites from "Gordes" nickel deposit located in Western Turkey were subjected to sulfuric acid leaching at atmospheric pressure. Experiments were conducted in order to determine the optimum conditions for agitation leaching by studying various parameters, including time, acid concentration, leaching temperature and particle size. Agitation leach experiments showed that nickel and cobalt could be extracted from both ores. Nickel and cobalt extractions were 96.0% and 63.4% for...
Usage of microwave and ultrasound in the extraction of essential oils and phenolic compounds
İnce, Alev Emine; Şahin, Serpil; Şümnü, Servet Gülüm; Department of Food Engineering (2011)
The objective of this study is to extract phenolic compounds from nettle and melissa by using microwave and ultrasound and to compare these methods with conventional extraction and maceration, respectively. Extraction of melissa essential oil was also studied. In extraction of phenolics, effects of extraction time (5-20 min for microwave; 5-30 min for ultrasound) and solid to solvent ratio (1:10, 1:20, 1:30 g/ml) on total phenolic content (TPC) were investigated for microwave and ultrasound extractions. Dif...
Synthesis of zinc oxide nanoparticles elaborated by microemulsion method
Yildirim, Ozlem Altintas; Durucan, Caner (2010-09-17)
Zinc oxide (ZnO) nanoparticles were synthesized by a reverse microemulsion system formed from sodium bis(2-ethylhexyl)sulfosuccinate (Aerosol OT, or AOT):glycerol:n-heptane. The zinc precursor was zinc acetate dihydrate. The formation of ZnO nanoparticles was achieved by calcination of premature zinc glycerolate microemulsion product in air at 300, 400 and 500 degrees C. The crystal structure and the morphology of the ZnO nanoparticles were characterized by X-ray diffraction (XRD) and scanning electron micr...
Modification of Quinoa Starch by High Hydrostatic Pressure and Ultrasonication and Assessment of Its Physicochemical Properties
Unal, Kubra; Alpas, Hami; Öztop, Halil Mecit (2023-01-20)
Quinoa starch was extracted and treated with different technologies to modify its properties. High hydrostatic pressure (HHP) at 250, 350, and 500 MPa at 20 and 40 °C and ultrasonication at 100% power with a constant pulse for 15 min were applied as modification methods. Following the treatments, functional, rheological, morphological, and structural analyses were carried out. Time domain (TD) NMR relaxometry experiments confirmed that HHP treatment caused less granule swelling of starch. NMR relaxation spe...
Preparation and surface modification of noble metal nanoparticles with tunable optical properties for SERS applications
Kaya, Murat; Volkan, Mürvet; Department of Chemistry (2011)
Metal nanostructures exhibit a wide variety of interesting physical and chemical properties, which can be tailored by altering their size, morphology, composition, and environment. Gold and silver nanostructures have received considerable attention for many decades because of their widespread use in applications such as catalysis, photonics, electronics, optoelectronics, information storage, chemical and biological sensing, surface plasmon resonance and surface-enhanced Raman scattering (SERS) detection. Th...
Citation Formats
O. Çokgör, “Separation of copper and cobalt from pyrite leach solution by solvent extraction,” Ph.D. - Doctoral Program, Middle East Technical University, 1991.