Arman Ehsani

• Doctor of Philosophy
• Professor (Assistant) at Adana Alparslan Türkeş Science and Technology University

In this paper, the electrowinning of copper from a synthetic copper sulfate solution and the pregnant leach solution (PLS) derived from the leaching of e-waste was investigated. The effects of impurity ions (Co 2+ , Fe 3+ and Cl -) and additives (thiourea and gelatine) on the corrosion of lead anode, deposit quality and morphology were studied. The...

The downstream treatment of chloride leach solutions of WPCB for recovery of base and precious metals by a combination of adsorption and precipitation processes were carried out. A synthetic leach solution (1 M HCl, 116.5 g/L Cl-, 30 g/L Cu2+, 2.5 g/L Fe3+, 5 mg/L Au3+, 10 mg/L Ag+ and 20 mg/L Pd2+), which was prepared based on the composition of t...

In this paper, the electro-winning of copper from synthetic copper sulphate solutions and the pregnant leach solution (PLS) derived from the leaching of e-waste was investigated in an attempt to reduce energy consumption by using a polyoxometallate (POM), ammonium metatungstate hydrate (AMTH) as a novel additive. Effect of addition of AMTH on the c...

In this study, firstly, the effects of ammonia concentration, leaching time and solid/liquid ratio on the leaching behaviour of zinc from a smithsonite (ZnCO3) ore sample in aqueous ammonia solutions were investigated at room temperature by chemical, X-ray diffraction (XRD) and Fourier-transform infrared (FT-IR) spectroscopy analyses. It was found...

In this study, the direct conversion behaviors of different alkaline earth metal solids (the hydroxides and the sulfates of alkaline earth metals Ca, Sr, Ba and Mg) to their corresponding carbonates in dissolved carbonate-containing pregnant solutions obtained by direct leaching of a smithsonite (ZnCO3) ore sample in aqueous ammonia solutions havin...

Besides sulfide ores, non-sulfide and mixed oxide-sulfide zinc have become important resources for zinc. Prior to processing these types of ores using non-conventional methods, chemical, and mineralogical characterization is required. In this study the chemical and mineralogical characteristics of domestic mixed zinc ore were studied using optical...

In recent years, because of the decreasing liberation sizes of the minerals, processes such as grinding need to be evaluated in more detail. As is well known, size reduction processes are very important both in mineral processing and in many industrial applications. However, to increase the efficiency of the processes after size reduction, variatio...

In this study, the interaction of barium (Ba(OH)2·8H2O and BaSO4) or magnesium (Mg(OH)2 and MgSO4·7H2O) containing solids with dissolved carbonate-loaded solutions formed after leaching of a local smithsonite (ZnCO3) ore sample in aqueous sodium hydroxide solutions was investigated using X-ray diffraction analyses for the removal of dissolved carbo...

The impact of particle shape and surface properties has been mainly overlooked in the literature for different mineral systems. In this study, to investigate the effects of morphological variations, samples of clean coal particles (−0.212 + 0.075 mm) were used and the flotation experimental in a batch condition (2 L Denver cell) were conducted in t...

Ülkemizin önemli sektörlerinden olan ve sanayi için hammadde sağlayan madencilik sektörü, doğası gereği içerdiği riskler nedeniyle bilgi, deneyim, uzmanlık ve sürekli denetim gerektiren sektörlerin başında gelmektedir. Madencilik sektöründe iş kazalarıyla ve meslek hastalıklarıyla diğer sektörlere nazaran daha çok karşılaşılmasının sebebi yoğun eme...

X-Işını difraksiyonu yöntemi (XRD), daha çok mineral tipi tanımlaması (kalitatif analiz) için kullanılırken, minerallerin kantitatif kimyasal içerik analizi için titrasyon (yaş kimyasal analiz), X-Ray Fluressance (XRF), Atomik Absorbsiyon Spektrometresi (AAS), İndüktif Çiftlenmiş Plazma Kütle Spektrometresi (ICP-MS) gibi yöntemler kullanılmaktad...

Vermiculite, a hydrated Mg/Al/Fe silicate mica-like clay mineral with a laminate structure. Vermiculite is a very versatile material. It has a remarkable ability to expand to many times its original volume (exfoliation) when heated (>300°C). The majority of applications call for vermiculite in its exfoliated form, and it has a wide range of appl...

Marine surroundings (i.e., Seas and Oceans) constitute about 71% of the earth's surface. It consists of an enormous reservoir of numerous mineral deposits such as massive sulfides, manganese nodules and cobalt-rich ferromanganese crusts. These mineral deposits could be a possible choice to satisfy the rising demand for raw materials and ores in the...

In this study, the historical development of the ocean and undersea mining has been discussed briefly. The oceans and seas cover about 71% of the earth surface area. The development of the deep-sea and ocean mining has passed through the sea and ocean science (oceanographic) studies. The first studies about sea and submarine carried out by the Cret...

In this paper, a brief overview of the effect of temperature on the electrowinning of copper was provided. Furthermore experimental data for the influence of temperature on current efficiency, energy consumption, rate and morphology of Cu deposition in the electrowinning of copper from a synthetic copper sulfate solution were also presented. Temper...

Seas and oceans constitute about 70% of the earth’s surface. They contain an enormous stock of various mineral resources such as sedimentary (marine placers), massive sulfide ore deposits, manganese nodules and cobalt-rich ferromanganese crusts. Sea and ocean floor ore deposits could well contribute to the meeting of ever-rising demand for raw mate...

Copper, first metal discovered by mankind after gold, ensured the transition of human being from Stone Age to Bronze Age. Up to date, it is observed that copper is the world's most useful metal. Historic development of mankind is mainly affected by discovery and usage of metals and especially copper. Based on the initial findings of the various...

Seas and oceans constitute 72% of the earth surface area. The mineral deposits that occur on the sea and ocean floor perhaps is the only option that will be encountered to meet the needs of present and future raw materials. Due to this reason, we need to perform variety of scientific studies to provide the utmost benefit of seas and oceans' mineral...

In this thesis, the recovery of copper by electro-winning (EW) and precipitation, from a synthetic and pregnant leach solution (SLS/PLS: 27-30 g/L Cu) derived from the leaching of e-waste was investigated. The effects of impurity ions (Co2+ , Fe 3+ and Cl - ), inorganic additives (thiourea, gelatine) and organic ammonium meta tungstate hydrate...

In this study, recovery of copper by precipitation from copper-rich real/synthetic leach solutions derived from the acidic peroxide leaching of waste printed circuit boards (WPCBs) was investigated as an alternative to electro-winning. Copper was precipitated using ethanol as copper sulphate (CuSO4.5H2O) and using sodium sulphite (Na2SO3) as Chevre...

Bu çalışmada, atık baskılı devre kartlarının (ABDK) asidik peroksit liçi sonucu elde edilen bakır içeriği yüksek (27-30 g/L Cu2+) gerçek/sentetik liç çözeltilerinden bakırın, elektro-kazanıma alternatif olarak, çöktürülerek kazanılması araştırılmıştır. Bakır, etanol ile bakır sülfat (CuSO4.5H2O) ve sodyum sülfit (Na2SO3) ile Chevreul tuzu (Cu2SO3.C...

In this paper, the electrowinning of copper from a synthetic copper sulfate solution and the pregnant leach solution (PLS) derived from the leaching of e-waste was investigated. The effects of impurity ions (Co 2+ , Fe 3+ and Cl-) and additives (thiourea and gelatine) on the corrosion of lead anode, deposit quality and morphology were studied. The...