Sphalerite dissolution kinetics were studied by means of long-term (>500 h) flow-through experiments in the pH range of 1–4.2, at 25, 50 and 70 °C and at three different dissolved O 2 concentrations, from 0.2 to 8.7 mg L −1 to obtain a dissolution rate law useful to predict sphalerite long-term dissolution behavior in environments affected …
Environment: In sulfide ore veins in all rock classes. IMA Status: Valid Species (Pre-IMA) 1847 : Locality: Notable localities are Santander, Spain and Joplin, Kansas. Link to MinDat Location Data. ... Optical Properties of Sphalerite : …
The period of sphalerite formation near the Middle–Late Jurassic boundary is characterized by enhanced tectonic and hydrothermal activity in Europe, related to the opening of the Central Atlantic and …
Banded sphalerite, near Hazel Green in Lafayette County, Wisconsin. Sample is about 1 cm long. Sphalerite occurs in a wide range of hydrothermal environments. It is common with chalcopyrite in exhalative massive sulfide bodies associated with volcanic rocks, such as those deposits near Rhinelander and Crandon. It is abundant in low temperature …
This study proposes a green analysis method for direct measurement of Zn and Fe contents in natural sphalerite that is environmental friendly, highly accurate, and has no secondary pollution …
However, traditional sphalerite depressants are harmful to environment (Wang et al., 2020). Thus, it is urgent to explore environmental-friendly alternative to substitute conventional reagents. In order to overcome the drawbacks of traditional sphalerite depressants, many investigations have been devoted to explore novel …
This study proposes a green analysis method for direct measurement of Zn and Fe contents in natural sphalerite that is environmental friendly, highly accurate, and has no secondary pollution was established based on the CIELAB color space comparative method. As Fe atoms replace Zn atoms in ZnS, the sphalerite exhibits distinct color …
High-resolution transmission electron microscopy (HRTEM) analysis of the triple-cation mixed sphalerite-structured ZnGeSiP 3 compound reveals a distinct d-spacing of 0.312 nm, consistent with the characteristic crystalline plane of (111) within the cubic ZnS lattice, as depicted in Fig. 1(c).Concurrently, the selected area electron diffraction …
Sphalerite is a common sulfide mineral, and xanthate is usually used as the collector of sphalerite flotation. In order to realize the simultaneous flotation of sphalerite- and zinc-containing oxide ores, in this paper, dodecylamine was used as the collector and sodium sulfide as the regulator to explore the flotation behavior of sphalerite in a …
This chapter describes Sphalerite (abbrv. sp), as seen with optical, reflected light microscopy. After summing up compositional data, main properties and optical …
The research aims to: (1) clarify the systematic structure and composition of sphalerite, (2) explore the elemental remobilization mechanisms, (3) reveal the ore …
Sphalerite, also known as blende or zinc blende, is the major ore of zinc. When pure (with little or no iron) it forms clear to white crystals (known as Cleiophane). Yellow to orange sphalerite is often called "golden sphalerite." Red shades of sphalerite are known as Ruby Blende or Ruby Jack.
Sphalerite and arsenopyrite can host trace elements (e.g., Ge, Cd and Au) that are important for high technology applications.These trace elements are incorporated into the structure of the host mineral (e.g., by substitution) if inclusions are apparently absent.Focused ion beam technique and transmission electron microscopy combined …
Sphalerite is commonly floated in an alkaline environment and under such conditions the overall activation mechanism is obscured by the hydrolysis of Cu 2+ and precipitation of Cu(OH) 2.. Electrokinetic and kinetic flotation tests showed that the activation of sphalerite is a two-stage process; the activation products formed on the …
The high Mn contents in sphalerite generally reflect the mineralization having been formed under a reduced environment [25,88,100]. The Mn concentrations in sphalerite from the Pusangguo deposit are high (1317–6443 ppm, average 2868 ppm), indicating that the quartz–sulfide-ore stage of mineralization occurred under relatively …
Sphalerite is a common sulphide and is the dominant ore mineral in Zn-Pb sulphide deposits. Precise determination of minor and trace element concentrations in sulphides, including sphalerite, by Laser-Ablation Inductively-Coupled-Plasma Mass-Spectrometry (LA-ICP-MS) is a potentially valuable petrogenetic tool. In this study, LA …
Semantic Scholar extracted view of "Study on the depression mechanism of calcium on the flotation of high-iron sphalerite under a high-alkalinity environment" by Shengdong Zhang et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,736,365 papers from all fields of science ...
Sphalerite and galena are the primary sources for the extraction of Zn and Pb. However, these two minerals generally associated closely with each other in nature [3]. ... carboxyl and phosphoric acid groups within its molecular [20]. HPAA is stable and environmental-friendly, which has been applied as scale and corrosion inhibitor in ...
Carbon and Oxygen isotopes are used to understand the physicochemical conditions of the ore-forming environment. Sphalerite, pyrite, and chalcopyrite from Banskhapa deposit suggest a broad range of δ 34 S values (7.27–7.79‰, 8.37–8.61‰, and 6.58–6.72‰ respectively, n = 7), which advocate sulfur mostly derived by …
Sphalerite: Galena and sphalerite commonly occur together and darker varieties of sphalerite may initially be confused with galena. Pure sphalerite samples can be distinguished from galena because they are harder (3.5 to 4) and have a lower specific gravity (3.9-4.1). The color of their streak provides an even simpler way to distinguish …
Sphalerite shows significant variations in concentrations, differences in trace element patterns among the four deposits, shown in box and whisker plots. Sphalerite is …
The effect of the alkaline environment on sphalerite flotation is significantly correlated with the iron content of sphalerite: with increasing alkalinity, the flotation recovery of all four kinds of sphalerite show downward trends and the degree of reduction in recovery increases with increasing iron content of the sphalerite. The highly ...
1. Introduction. Sulfide (e.g., sphalerite) and oxide (e.g., smithsonite) zinc (Zn) ores are important mineral resources that have been exploited extensively worldwide for thousands of years and mining and smelting of non-ferrous metals are major contributors to environmental contamination (Zhou et al., 2020).Careless exploitation of natural …
Scottish Universities Environmental Research Centre, East Kilbride, Glasgow G75 0QF, United Kingdom. Search for other works by this author on: GSW. ... Sphalerite precipitated from deep, hydrothermal fluids with 34 S-enriched sulfide is enriched in Cd, Sb, Cu, and Ag, whereas Fe and As are enriched in sphalerite …
The photocatalytic disinfection capability of the natural semiconducting mineral sphalerite is studied here for the first time. Natural sphalerite can completely inactivate 1.5 × 107 cfu/mL E. coli K-12 within 6 h under visible light irradiation. The photocatalytic disinfection mechanism of natural sphalerite is investigated using multiple scavengers. The critical …
sphalerite, zinc sulfide (ZnS), the chief ore mineral of zinc. It is found associated with galena in most important lead-zinc deposits. The name sphalerite is derived from a Greek word meaning "treacherous," an …
Sphalerite, zinc sulfide (ZnS), the chief ore mineral of zinc. It is found associated with galena in most important lead-zinc deposits. The name sphalerite is derived from a Greek word meaning "treacherous," an …
Contrasting fluid systems and ore-forming mechanisms correspond to markedly different trace element systematics in sphalerite. Permian sphalerite is significantly enriched in In (up to 2500 μg/g In) …
Since the flotation of sphalerite occurs in an aqueous environment, and it has been demonstrated that water molecules have a non-negligible influence on the surface properties of minerals and their interaction with reagents [15], [16]. However, the above techniques can only measure the mineral surface characteristics but not the …
Microflotation Tests. Sphalerite and galena were tested for floatability with and without ZnSO 4 using single mineral flotation tests. Figure 2 displayed the outcomes of sphalerite and galena flotation recoveries as a function of pH. As shown in Fig. 2, under acidic conditions, the recovery rate of sphalerite could reach about 55% when the …
The effect of the alkaline environment on sphalerite flotation is significantly correlated with the iron content of sphalerite: with. Conclusions. In this paper, the depression mechanism of high-iron sphalerite flotation under environment of high alkalinity and high calcium concentration were studied by means of flotation tests, …
Sphalerite is a common mineral, and occurs in many distinct colors and forms. Iron impurities are often present in this mineral, and for this reason it is not commonly transparent. If Sphalerite contains a large amount of iron impurities, it will have a metallic dark gray or black color, which is typical of most sulfide minerals. Sphalerite is one of …
The study for the effect of ferric ion concentration on sphalerite dissolution is given in Fig. 2.As shown from Fig. 2, the sphalerite dissolution increases gradually with leaching time and with increasing ferric ion concentration.At the end of 4 h leaching, 0.26 and 14.66% zinc extraction were achieved with 0 M FeCl 3 and 0.1 M Fe 3+, respectively.
1. Introduction. Copper and zinc represent critical metal resources and essential materials for modern construction [1].However, the depletion of high-quality mineral resources has become a growing concern [2, 3].Chalcopyrite serves as a primary source of copper extraction, but it often occurs alongside sphalerite and other sulfide …
Sphalerite, the most important ore of the zinc ore, is a very common mineral and is associated with galena, pyrite, marcasite, …
Sphalerite, also known as blende or zinc blende, is the major ore of zinc. When pure (with little or no iron) it forms clear to white crystals (known as Cleiophane ). Yellow to orange …
Supernormal enrichment of cadmium in sphalerite via coupled dissolution-reprecipitation process Hongyu Duan 1, Changming Wang 1, Rong Hu 1, Jiaxuan Zhu 1 & Jun Deng 1,2
