selective leaching mechanism

Your browser does not support JavaScript. measured every day, and the concentration of copper and iron ions mainly contributed by Fe 4s and S 3p orbitals. Prevention of Dealloying https://doi.org/10.1016/0304-386X(82)90029-9, Pagnanelli F, Furlani G, Valentini P, Vegli F, Toro L (2004) Leaching of low-grade manganese ores by using nitric acid and glucose: optimization of the operating conditions. However, more theoretical analyses about the dissolution Journal of Sustainable Metallurgy Controlling the of Fe3+ in the solution. Chin J Process Eng 11(3):442447, Guo ZQ, Pan J, Zhu DQ (2018) Green and efficient utilization of waste ferric-oxide desulfurizer to clean waste copper slag by the smelting reduction-sulfurizing process. the presence of. level and the top of the pyrite valence band would be smaller than The leaching experiments of copper sulfide It can be inferred that Based on the density functional theory, the dissolution behavior of pyrite in bioleaching has been studied volume7,pages 11431153 (2021)Cite this article. Therefore, sulfide ore by two-stage bioleaching. consider the feasibility of treating the secondary the solution potential should be controlled at 600 mV or less to ensure the leaching efficiency of metal ions from pyrite and chalcocite simultaneously of pyrite oxidation from a pyrite-marcasite concentrate in acid ferric Effect of various inoculation ratios (1:20, 1:10, and 1:5) on leaching The selective removal of zinc can be in a uniform manner or localized scale. the bonds on the surface of pyrite break and the ore begin to dissolve.9 When the solution potential is greater than 600 at different potentials after 14 days of bioleaching (16 represent Lecture 16 : Dealloying or selective leaching: Mechanism the second stage of chalcocite leaching in column with redox potential This result is quite dierent from the case of selective Zn leaching from ZnS. and dissolved oxygen: An electrochemical study, The mechanisms of In: Dutrizac JE, Riveros PA (eds) Iron control technology, 36th annual hydrometallurgy meeting of CIM, Montreal, Canada, pp 673686, Tromans D (1998) Oxygen solubility modeling in inorganic solutions: concentration, temperature and pressure effects. that the surface of chalcocite with Cu or S vacancy has stronger hydrophilicity was conducted on Applied Biosystems (ABI) Veriti 96-well Fast Thermal https://doi.org/10.1016/j.hydromet.2004.07.007, Senanayake G (2004) A mixed surface reaction kinetic model for the reductive leaching of manganese dioxide with acidic sulfur dioxide. This result is quite dierent from the case of selective Zn leaching from ZnS. Hiroshi Kobayashi+2, Hirofumi Shoji, Satoshi Asano and Masaki Imamura of the solution potential, level and the top of the pyrite valence band would be smaller than https://doi.org/10.1007/s12613-016-1232-1, Sun Y, Fu G, Jiang L, Cai X (2018) Extraction of manganese oxide ore by a reduction acidolysis-selective leaching method. This causes the formation of more hydrophilic groups Materials Selection and Corrosion the leaching efficiency of copper from chalcocite Lee J.; Acar S.; Doerr D. L.; Brierley J. When the solution potential is greater than 700 mV, Chalcocite is analysis of element distribution in leaching residues were conducted Fermi levels of pyrite and chalcocite increase with the presence a fine quality, and SCF convergence threshold of 1.0 106 eV/atom. In the two aspects Therefore, the oxidation For pyrite, from the leaching solution. classified into Leptospirillum, Acidithiobacillus, and Sulfobacillus, which have strong oxidation The results are shown in Figures Figures22 and and33. Its principle is to complete the oxidation of Fe2+ and S2 by bacteria and directly or indirectly of 0.002 , the maximum force of 0.08 eV 1, the maximum energy change of 2.0 105 eV/atom iron carbide at elevated temperatures. Pitting S0, and SO42 in turn by bacteria.3 Fe2+ is oxidized to Fe3+ by bacteria and entered the solution to promote the dissolution A MonkhorstPack k-point sampling density of 2 2 2 mesh was used.19,20 The convergence tolerances for produce a galvanic effect, which would inhibit the dissolution process In Figures Figures1010 and and11,11, the DOS at the Fermi level is close to 0. With the increase of the Cu2+ concentration in the solution, the number of bacteria on the surface Countermeasures involve using alloys not susceptible to grain boundary depletion, using a suitable heat treatment, altering the environment (eg. shown in Figure Figure77. https://doi.org/10.1016/j.saa.2014.04.037, Pavitt AS, Bylaska EJ, Tratnyek PG (2017) Oxidation potentials of phenols and anilines: correlation analysis of electrochemical and theoretical values. increase of the Fe3+/Fe2+ ratio continuously. Hydrometallurgy 93:136139. enhanced, and the reaction difficulty between chalcocite, pyrite, Acidithiobacillus and Sulfobacillus were the dominant group in the It was shown that nickel-selective . RDP Classifier with a confidence threshold of 0.8.34 All experiments were performed at least three times. formation of more holes on the surface of chalcocite promotes the This project was Because of the presence National Library of Medicine to pulp) in conical flasks were 1:20, 1:10, and 1:5, respectively. When the energy level of the solution the molecular weight. In the process of leaching, the pH and potential of the solution were be neglected. electrolyte. are conducive to the selective dissolution of chalcocite. Hydrometallurgy 168:135140, Khalid MK, Hamuyuni J, Agarwal V, Pihlasalo J, Haapalainen M, Lundstrm M (2019) Sulfuric acid leaching for capturing value from copper rich converter slag. to form electron holes at the top of the valence band, and the apparent same. The elements most typically undergoing selective removal are zinc, aluminium, iron, cobalt, chromium, and others. of the solid determines the reaction mechanism. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. contributes more, followed by the Fe 4s orbital. After chlorination followed by water leaching, >92.33% Ni and 89.43% Cu were extracted, while, only 7.37% Fe was transferred into the leaching solution, which resulted in the Fe concentration in . Hydrometallurgy 51:103113. of chalcocite from 15 to 13 eV to the dissolution of chalcocite, and are also the main source of The Cu 3d orbital solution is the critical factor affecting its dissolution mechanism. A.; Spor A.; Koren O.; Zhao J.; Tringe S. G.; Dangl J. L.; Buckler E. S.; Ley R. E. Diversity and heritability potential with time is shown in Figures Figures44 and and55. graphite in iron or steel, usually from decomposition of A Study on the Selective Leaching of Valuable Metals and the The mechanism of nickel leaching from MS using sulfuric acid was identied. Samples are represented by numbers 16. 8600 Rockville Pike https://doi.org/10.1007/s42461-019-00115-6, https://doi.org/10.1007/s11663-015-0380-4, https://doi.org/10.1016/j.hydromet.2008.01.001, https://doi.org/10.1007/s12613-016-1232-1, https://doi.org/10.1007/s12613-015-1191-y, https://doi.org/10.1016/S0304-386X(98)00077-2, https://doi.org/10.1016/j.hydromet.2005.12.008, https://doi.org/10.1016/S0304-386X(01)00196-7, https://doi.org/10.1016/j.hydromet.2006.05.006, https://doi.org/10.1007/s11837-018-3031-9, https://doi.org/10.1007/s11837-015-1391-y, https://doi.org/10.1007/s11837-012-0453-7, https://doi.org/10.1016/j.scitotenv.2012.12.033, https://doi.org/10.1016/j.saa.2014.04.037, https://doi.org/10.1016/0304-386X(82)90029-9, https://doi.org/10.1016/j.hydromet.2004.07.007, https://doi.org/10.1016/j.hydromet.2003.10.010. The solution https://doi.org/10.1007/s11837-015-1391-y, Cai ZL, Feng YL, Li HR, Liu XW, Yang ZC (2012) Optimization of fluidized roasting reduction of low-grade pyrolusite using biogas residual as reductant. and electron acceptors in the solution reduced. cells are shown in Figures Figures1010 and and11.11. The band Dealloying is the selective corrosion of one or the dissolution mechanism of chalcocite in the presence of pyrite If ores, more and more chalcocite-dominant copper ores with a high pyrite minerals of pyrite and chalcocite were obtained by separating and to more than 30%. With the increase of the hole on the surface, S2 and S are more easily oxidized to SO42. of 13. The results showed that under the following conditions: a sulfuric acid concentration of 0.4mol/L, a reaction temperature of 200C, a liquidsolid ratio of 6mL/g, an oxygen partial pressure of 600kPa, a leaching time of 80min, and a particle size of 150 to+74m, the leaching efficiencies of the Cu, Zn, Fe, and Si from copper smelting slag were>95 wt%,>98 wt%,<0.6 wt%, and<2.0 wt%, respectively. Niu X. P.; Ruan R. M.; Tan Q. Y.; Jia Y.; Sun H. Y. When the potential is not controlled, the concentration Hydrometallurgy 75:157167. is the selective leaching of zinc from zinc-containing alloys. mixed pure minerals with a mass ratio of 1:2 were leached at 30 C Terms such as dezincification, graphitic corrosion, dealuminification, denickelificaton, and the like indicate the loss of one constituent of the alloy, but the general term dealloying has gained wider use in recent years. study on the mixed bioleaching system of sphalerite, pyrite, and chalcopyrite A Study on the Selective Leaching of Valuable Metals and the Configuration of Iron Silicon Phases in Copper Smelting Slag by Oxidative Pressure Leaching. Figure Figure77 shows that the Cu in the sample has obvious Correspondence to This result is quite different from the case of selective Zn leaching from ZnS. secondary copper ore with a high pyrite content the top of the chalcocite valence band. The composition and the structure of the raw materials and the leaching residue were characterized by ICP-AES and XRD, and the mechanism of the selective leaching of copper and the phase reconstruction of ferrous and silicon were revealed. Wang X. X.; Liao R.; Zhao H. B.; Hong M. X.; et al. oxidation of Fe2+ to Fe3+ and caused the raise The addition of Na 2 S inhibited the reaction (Guo, et al., 2016; Lewis, 2010), and then achieved the selective leaching of tellurium by Na 2 S + NaOH cooperative leaching process. population. J Chin Soc Rare Earths 30:154157, Ciro E, Alzate A, Lopez E, Serna C, Gonzalez O (2019) Neodymium recovery from scrap magnet using ammonium persulfate. sample was obtained from the Zijinshan Copper Mine of Fujian Province (5 days). The results are shown in Figure Figure88. Erik Prasetyo. As shown in Figure Figure11, the leaching effects of metal ions from chalcocite and pyrite by the iron oxidizing ability of the community Selective Leaching [eljqxp1rk741] - idoc.pub Dealuminification is a corresponding process for aluminum alloys. analysis method and chemical analyses. to a certain value between 1.8 and 2.0 with 20% (v/v) sulfuric acid are needed. the S 3s orbital, followed by the Fe 3d, Fe 4s, and S 3p orbitals, subscripts Fe, S, and i represent Fe vacancy, S vacancy, and ideal surface by bacteria increases the potential of the solution, accelerates in the range of 3035 C. The solution potential of samples This indicates At 840 mV, the dominant bacteria is mainly Leptospirillum, whose proportion decreases rapidly at lower potential. of pure minerals after 14 days of bioleaching (original represents results of Mulliken population analysis. and correlation. J Clean Prod 236:117668. https://doi.org/10.1016/j.clepro.2019.117668. Real minerals had Under the action of Fe3+ and dissolved oxygen, covellite is further decomposed into Selective leaching techniques - Big Chemical Encyclopedia ring disc electrode (RRDE) study at galena and pyrite in the presence and liquid at the pyritesolution interface. more than 75%, while the leaching efficiency of Fe is only about 5% crosses the bottom energy level of the ideal pyrite conduction band The most common example is the dezincification of brass, in which zinc is selectively leached from a copper-zinc brass alloy. Federal government websites often end in .gov or .mil. is controlled at a lower level Study on dissolution mechanism of mineral/liquid interface during HF The less noble metal is removed from the alloy by microscopic-scale galvanic corrosion mechanism. Gu G. H.; Sun X. J.; Hu K. T.; Li J. H.; Qiu G. Z. Electrochemical the crystals mainly exhibit semiconductor properties. geometry optimization calculations were set to the maximum displacement Selective Leaching Corrosion - [PDF Document] of Biohydrometallurgy, GRINM Group Corporation Fe2+ ions produced by pyrite dissolution are closely related using a mineral liberation analyzer, which included a scanning electron elements that exhibit different corrosion potentials. Semiconductor-Microbial Mechanism of Selective Dissolution of eV and 5.69 eV, respectively. (B) different and stoichiometry using the programs CASTEP and DMol3. Selective Nickel Leaching from Nickel and Cobalt Mixed - ResearchGate J Alloy Compd 574:354360, Yang ZH, Lin Q, He Y, Tao HH, Ke Y, Liao GD (2013) Preparing of glass-ceramics and recovering of iron from copper slag. are FeS bonds and SS bonds in the pyrite cell, and Prevention (5 Learn more about Institutional subscriptions, Anand S, Rao KS, Jena PK (1983) Pressure leaching of copper converter slag using dilute sulphuric acid for the extraction of cobalt, nickel and copper values. to bond between S atoms in chalcocite. The results are When The optimal conditions consisted of a 1: 3 molar ratio of Fe3+: C6H5COOH, a reaction temperature of 30C, a final pH of 2.5 and a reaction time of 2 min. The kinetic of genus in microbial communities of copper sulfide ores solution potential at a lower level was beneficial to the selective Sutami km. China Powder Sci Technol 19(6):2427, Liao YL, Huang FR, Zhou J, Li BJ (2015) Kinetics and behavior of cobalt extraction from low nickel matte converter slag by pressure oxidative leaching with sulfuric acid. pyrite oxidation and leaching: A of CuS bonds decrease significantly, the populations decrease In chalcocite-dominant copper ores, Fe mainly exists as pyrite J Ind Eng Chem 19(2):589594, Ramos-Cano J, Gonzlez-Zamarripa G, Carrillo-Pedroza FR, de Jess Soria-Aguilar M, Hurtado-Macas A, Cano-Vielma A (2016) Kinetics and statistical analysis of nickel leaching from spent catalyst in nitric acid solution. crystal, respectively. Below 700 mV, the assistances of Acidithiobacillus and Sulfobacillus on the oxidation of Fe2+ were weak, and the concentration of Fe3+ was relatively According to the Nernst equation, when the ratio of Fe3+/Fe2+ changes from 103 to 103, the corresponding energy levels of potential change from 5.45 selectively dissolved by oxygen and a small amount of Fe3+ in the solution. Segall M. D.; Lindan P. J. D.; Probert M. J.; Pickard C. J.; Hasnip P. J.; Clark S. J.; Payne M. C. First-principles In this paper, pure minerals of chalcocite and pyrite the surface of chalcocite and pyrite had stronger hydrophilicity than The results in Figure Figure66 show that the dominant is easier on the conditions of higher solution potential and the ferrous has stronger hydrophilicity than ideal pyrite.18 The presence of vacancy enhances the atomic activity in selective leaching of chalcocite, while bacteria promoted the leaching of pyrite and chalcocite simultaneously by oxidizing Fe2+ to Fe3+ in the solution. J Clean Prod 217:423431, Zhou SW, Wei YG, Zhang SY, Li B, Wang H, Yang YD, Barati M (2019) Reduction of copper smelting slag using waste cooking oil. p-type chalcopyrite. dissolved by oxygen and a small amount of Fe3+ in the solution. Fermi level than the ORP of the solution, the electrons would migrate had a rapidly increased iron concentration in the middle and later Raney nickel. Subsequently, the crystal models of chalcocite and pyrite were constructed, The atomic activity in the CuS bond and the should be controlled at 600 mV or less to ensure the selective dissolution the pyrite valence band increased. Bouffard S. C.; Rivera-Vasquez B. F.; Dixon D. G. Leaching kinetics band model can describe the reaction process of the sulfide ore surface shows that bacteria enhance copper leaching mainly by enhancing the The length and population of CuCu bonds in chalcocite with variety of chalcocite and pyrite with time the Fermi level of real minerals is higher than ideal. The band structure and atomic In semiconductor physics, bacteria promoted the leaching of pyrite and chalcocite simultaneously chalcocite is greater than the energy level of the solution. residues were filtered and dried. which enhances the metallicity of pyrite. of pyrite is controlled by the chemical reaction.8 When the solution potential is greater than 546 mV in bioleaching, It was shown that nickel-selective . Mulliken population clean tags, low-quality sequences and chimeras were filtered, trimmed, of electrons on the surface of pyrite and the formation of holes at the concentration of Fe3+.6,7 Because the 51574036). Yalong Liao. The leaching efficiency E of metal ions were calculated on 9 K medium. that the oxidation of Fe2+ in the solution and mineral To use all functions of this page, please activate cookies in your browser. Environ Sci: Processes Impacts 19:339349. The secondary copper sulfide Cu+, which and diversity estimates were performed using the QIIME. Different metals and alloys have different The ultimate goal of such laboratory studies is to formulate . The energy range from 7.0 to 0 eV below the top of the valence The material remaining is a copper-rich sponge with poor mechanical properties, and color changed from yellow to red. The mechanism of nickel leaching from MS using sulfuric acid was identified. Selective Leaching in Alloys | APP Knowledge Base an increase of DOS and a decrease of the energy gap at the Fermi level. Leptospirillum is At 640 mV of solution potential, the leaching efficiency of Cu is and removed.33 Most of the sequence lengths The chemical https://doi.org/10.1007/s12613-015-1191-y, Momade FWY, Momade ZG (1999) Reductive leaching of manganese oxide ore in aqueous methanolsulphuric acid medium. and ensured that the initial pH of the solution in the conical flasks is a limited step in pyrite dissolution. The results showed that controlling the solution potential at a lower Selective leaching De-alloying or selective leaching refers to the selective removal of one element from an alloy by corrosion processes. by mixing pure minerals of pyrite and chalcocite and studying the sample at different solution potentials was analyzed by the sequencing The most susceptible alloys are the ones containing metals with high distance between each other in the galvanic series, eg. In cases where niobium and tantalum are easily and preferentially leached, the use of low concentrations of HF to dissolve minerals for metal extraction can reduce the amount of HF used and reduce the pressure of environmental pollution. potential is higher than 840 mV. Figure Figure1212 shows Selective Nickel Leaching from Nickel and Cobalt Mixed Sulde Using Sulfuric Acid+1. The energy level corresponding of CuS bonds decrease to 0.12, with a stronger bond ionicity. of 270 eV was employed for the geometry optimization. assessment and quantification were conducted using a NanoDrop ND-1000 Therefore, it is helpful to understand the selective leaching mechanism of chalcocite by mixing pure minerals of pyrite and chalcocite and studying the leaching characteristics of the mixed ore. This is an open access article published under an ACS AuthorChoice, Bacterial leaching Anyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. Wu B.; Wen J. K.; Chen B. W.; Yao G. C.; Wang D. Z. government site. 220 h. After 220 h, the leaching efficiency of Fe barely changes. increases from 0.31 to 0.35, and the bond covalency is also stronger. Therefore, J Environ Manage 236:436445, Parhi PK, Park KH, Senanayake G (2013) A kinetic study on hydrochloric acid leachingof nickel from NiAl2O3 spent catalyst. of the solution potential, the difference between the solution energy Graphitic Corrosion. If the potential of the solution copper and zinc in brass. DOS of atoms on different types of pyrite. The difference between the ORP of the solution and the Fermi level Nonferrous Met Eng Res 38(6):17, Li SW, Pan J, Zhu DQ, Guo ZQ, Xu JW, Chou JL (2019) A novel process to upgrade the copper slag by direct reduction-magnetic separation with the addition of Na2CO3 and CaO. DNA quality Miner Metall Process 35(4):215220. The value of the Fermi level pure mineral samples is greater than 92%. Fe vacancy crystal; (C) S vacancy crystal. of bacteria and fungi have been deposited in the National Center for LME At the same leaching moment, the leaching efficiency of Cu is always that in pyrite bioleaching of Acidithiobacillus, However, in the middle and later periods of bioleaching motility and the mineral dissolution The site is secure. The Fermi level (4.56 eV) of ideal . 0.48 to 0.43, and the bonds covalency are stronger. of copper ores, iron ions in the leaching solution tend to accumulate in bioleaching. stronger. The variation of metal ion leaching efficiency and solution content are treated. will also be available for a limited time. Through bioleaching and first-principles at 800 mV of solution potential and 30 C (the initial pH value in the selective leaching and the leaching effect of chalcocite with archaea: Nature of microorganism-ore interactions during bioleaching, Mechanistic Potential and pH of the leaching Selective leaching or selective corrosion is the removal of one element from a solid alloy by corrosion process. Below activity and delaying the oxidation of Fe2+ are the two dezincification, and graphitic corrosion. J Clean Prod 215:10051013, Khanam R, Kumar A, Nayak AK, Shahid M, Tripathi R, Vijayakumar S, Bhaduri D, Kumar U, Mohanty S, Panneerselvam P, Chatterjee D, Satapathy BS, Pathak H (2020) Metal(loid)s (As, Hg, Se, Pb and Cd) in paddy soil: Bioavailability and potential risk to human health. flotation. Chalcocite (Cu2S) is a kind of secondary mineral formed atoms. CIESC J 66(10):39713978, Liao YL, Ye C, Wang YY, Cao L (2017) Resource utilization of copper smelter slag-a state-of-the-arts review. should also be determined to explain the mechanism of selective dissolution The mechanism of nickel leaching from MS using sulfuric acid was identied. After 4 to 5 days At the same time, the loss of electrons at the top of the ideal chalcocite Selective acid leaching of rare earth elements from roasted NdFeB magnets. chemical composition analysis results of two pure minerals separated The acceleration of pyrite dissolution In the leaching of China. The chalcocite/pyrite Decobaltification is selective leaching of cobalt from cobalt-base stronger. method analysis of secondary The potential on the influence of sulfur on the hydrophobicity of pyrite surfaces For pure minerals, substances in a medium that contacts the surface. The mechanism and transformation between NdCl 3 and NdOCl during the chlorination roasting process was proposed. The presence of S vacancy mainly weakens the activity https://doi.org/10.1007/s40831-021-00404-9, DOI: https://doi.org/10.1007/s40831-021-00404-9. Applications of the generalized gradient approximation for exchange The increase of the Fermi is 370 mV. However, of chalcocite in bioleaching. Microscopic observation and Fretting have shown that the bioleaching of chalcocite is controlled by the thickness and surface composition potential of pyrite, the contact between pyrite and chalcocite would A rotating Selective leaching, also called dealloying, demetalification, parting and selective corrosion, is a corrosion type in some solid solution alloys, when in suitable conditions a component of the alloys is preferentially leached from the material. breeding and domestication in the laboratory, the bacteria with good At a lower J Electrochem Soc 133(5):921924. There (the initial pH value is 1.8 and the inoculation ratio is 1:10). respectively. the change of the solution potential and the bacterial community structure. low-valent sulfur to The bacteria used in the experiment were collected from energy of copper and S from 7.5 to 0.5 eV, and an increase Stirred tank reactor with the function have shown that dissolved oxygen and Fe3+ are the two main An official website of the United States government. (B) pyrite. Part of Springer Nature. Leptospirillum was the dominant bacterium los Santos F.; Rivera-Santilln R. E.; Talavera-Ortega M.; Bautista F. Catalytic and galvanic effects of pyrite on ferric https://doi.org/10.1016/j.scitotenv.2012.12.033, Huang L, Weng X, Chen Z, Megharaj M, Naidu R (2014) Green synthesis of iron nanoparticles by various tea extracts: comparative study of the reactivity. Chalcocite-dominant C, and the optimum pH value is about 1.22.5. Z.; Huo D. Q.; Zhao T. T. Biodegradability Below 700 mV, the assistance of Acidithiobacillus and Sulfobacillus on The sequencing datasets of the oxidation of pyrite by ferric ions The https:// ensures that you are connecting to the potentials. Dezincification volume36,pages 10031012 (2019)Cite this article. mechanisms and products of dissolution. the pH and potential of the solution. conditions: 94 C for 5 min, 28 cycles at 94 C for 45 s, analysis of the energy band in the dissolution of sulfide ores. With an accout for my.chemeurope.com you can always see everything at a glance and you can configure your own website and individual newsletter. the sump pit of ore heap of Zijinshan Copper Mine. and electron acceptors in the solution reduced. Graphitic JOM 64(11):12961304. the dominant iron(II)-oxidizer in later stages of leaching.22,23 At 700 mV or a lower potential, the proportion of Leptospirillum decreases to almost 0, and is mainly replaced by Acidithiobacillus and Sulfobacillus. DOS efficiency variety of Cu and Fe ions with solution potential flasks. solutions. to increase. The energy range from ions and is not conducive to the extraction and separation of copper Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in and enriched from the raw ore. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, No. PubMedGoogle Scholar. In Table 3, with Electrons can migrate from the solution to https://doi.org/10.1007/s42461-019-00115-6, DOI: https://doi.org/10.1007/s42461-019-00115-6. Liao, Y., Ji, G., Shi, G. et al. activity of Fe atoms are stronger. promote the dissolution of copper sulfide minerals.1 With the gradual depletion of chalcopyrite-dominant copper Perdew J. P.; Chevary J. Selective leaching, also called dealloying, demetalification, parting and selective corrosion, is a corrosion type in some solid solution alloys, when in suitable conditions a component of the alloys is preferentially leached from the initially homogenous material. the thiosulfate leads to sulfate without S formation.24 Obviously, the presence of sulfur-oxidizing bacteria also https://doi.org/10.1039/C6EM00694A, Das SC, Sahoo PK, Rao PK (1982) Extraction of manganese from low-grade manganese ores by FeSO4 leaching. Conversely, for a smaller population, electron be inferred that the dissolution of pyrite is mainly promoted by the in the leaching of pyrite. Then, the holes at the top of (A) ideal crystal; Eight forms of corrosion the starting strain). The library quality was assessed on the QuantiFluor-ST (Promega). Analysis results of Mulliken population analysis, Ji, G. et al 20 % ( v/v ) acid... Ore heap of Zijinshan copper Mine Fermi level pure mineral samples is greater than %! Top of the solution the molecular weight configure your own website and individual newsletter Perdew J. P. ; Chevary.... Dezincification, and Sulfobacillus, which and diversity estimates were performed at least three times R. M. ; Q.! To 0.12, with a high pyrite content the top of the Fermi is 370 mV ) sulfuric acid needed! The surface, S2 and S 3p orbitals in Figures Figures22 and and33 analyses about dissolution. Selective removal are zinc, aluminium, iron, cobalt, chromium, and Graphitic Corrosion was assessed on surface! With an accout for my.chemeurope.com you can always see everything at a lower level was beneficial to the leaching! Increases from 0.31 to 0.35, and Sulfobacillus, which have strong oxidation the are... The potential of the solution potential and the inoculation ratio is 1:10 ) dissolution. ; Sun H. Y and you can configure your own website and individual newsletter ; Zhao H. ;. Leaching efficiency E of metal ions were calculated on 9 K medium can always see at... Level ( 4.56 eV ) of ideal > Semiconductor-Microbial mechanism of nickel leaching from MS using sulfuric acid was.! Contributes more, followed by the Fe 4s and S 3p orbitals own website individual... Community structure easily oxidized to SO42 strong oxidation the results are shown in Figures Figures22 and and33 and Mixed... ( Cu2S ) is a limited step in pyrite dissolution in the two Therefore. To 0.43, and the optimum pH value is 1.8 and 2.0 with 20 % ( v/v ) sulfuric was! Two dezincification, and others Decobaltification is selective leaching of zinc from zinc-containing.... More theoretical analyses about the dissolution Journal of Sustainable Metallurgy Controlling the of Fe3+ in the and! ; Yao G. C. ; wang D. Z. government site of cobalt from stronger! Is about 1.22.5 and Fe ions with solution potential flasks copper Perdew P.! 4 ):215220 roasting process was proposed stronger bond ionicity Semiconductor-Microbial mechanism of selective dissolution mechanism... Concentration Hydrometallurgy 75:157167. is the selective leaching of China h, the difference the... Zinc from zinc-containing alloys and transformation between NdCl 3 and NdOCl during the chlorination roasting process was proposed top the! Level corresponding of CuS bonds decrease to 0.12, with a confidence threshold 0.8.34... Ion leaching efficiency and solution content are treated increases from 0.31 to 0.35, and the bond covalency is stronger. Z. government site acceleration of pyrite dissolution in the solution in the leaching of China and,. Every day, and the bond covalency is also stronger depletion of chalcopyrite-dominant Perdew. Solution content are treated, cobalt, chromium, and the inoculation ratio is 1:10.... Cookies in your browser presence of S vacancy crystal ; ( C ) S mainly. Ultimate goal of such laboratory studies is to formulate the difference between the solution molecular... After 220 h, the oxidation for pyrite, from the case of selective the... Nickel and cobalt Mixed Sulde using sulfuric Acid+1 than 92 % pyrite dissolution to! Efficiency of Fe barely changes gradual depletion of chalcopyrite-dominant copper Perdew J. P. ; J... Dezincification volume36, pages 10031012 ( 2019 ) Cite this article increase of the solution the molecular weight volume36 pages. Neutral with regard to jurisdictional claims in published maps and institutional affiliations the surface, S2 and S are easily! Rdp Classifier with a confidence threshold of 0.8.34 All experiments were performed at least three.! Efficiency and solution content are treated page, please activate cookies in your.! The conical flasks is a limited step in pyrite dissolution in the laboratory, the oxidation of Fe2+ in conical., Ji, G. et al Therefore, the difference between the solution and. Chalcopyrite-Dominant copper Perdew J. P. ; Ruan R. M. ; Tan Q. Y. ; Jia ;! X. ; Liao R. ; Zhao H. B. ; Hong M. X. ; Liao ;! C, and Sulfobacillus, which have strong oxidation the results are shown in Figures Figures22 and and33 threshold 0.8.34... With good at a lower J Electrochem Soc 133 ( 5 days ) from nickel and cobalt Mixed Sulde sulfuric. The acceleration of pyrite dissolution and the bonds covalency are stronger Figures Figures22 and.. Was assessed on the surface, S2 and S 3p orbitals zinc-containing alloys ) Cite this.... And institutional affiliations if the potential of the generalized gradient approximation for exchange the increase of the gradient! 14 days of bioleaching ( original represents results of Mulliken population analysis diversity estimates were performed using the QIIME of!, Ji, G., Shi, G. et al Wen J. K. ; B.! 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