process leaching oxidizing

ROLE OF OXIDIZING AGENTS IN LEACHING PROCESS OF

2018-9-20  Leaching in 0.1-1 M HCl plus ozone as an oxidizing agent, which was supplied by blowing gas through the pulp. [22] Chalcopyrite CuFeS 2 Microwave leaching with H 2SO 4 in presence of ozone at T = 293K; results do not depend on acid concentrations; H 2SO 4 is needed only to avoid iron hydrolysis; process is accelerated with the increasing ozone ...

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Comparative Study of Iron-Oxidizing and Sulfur-Oxidizing ...

2020-1-16  However, in sulfur-oxidizing process, TP in the bioleached PM was reduced to 11.4 g/kg, and the leaching ratio was reached up to 63.3%, nearly twice that (32.8%) of iron-oxidizing process. It was reported that the solibilization of P can be significantly influenced by the pH during bioleaching (Zhang et al., 2008 ).

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Comparative Study of Iron-Oxidizing and Sulfur-Oxidizing ...

2020-1-16  Furthermore, 18.1% of TN, 63.3% of TP, 65.4% of TK, and 45.6% of TOC were leached from the PM in the sulfur-oxidizing bioleaching process, whereas only 21.6% of TN, 32.8% of TP, 4% of TK, and 49% ...

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Mechanism underlying the bioleaching process of LiCoO2

2019-9-1  The bioleaching mechanism of LiCoO 2 was explored by using sulfur- and iron-oxidizing bacteria.. The lithium in the LiCoO 2 was dissolved by acid.. The cobalt in the LiCoO 2 was released by the reduction of Fe 2+ and acid dissolution.. Bacteria could produce acid by oxidizing pyrite to promote the dissolution of LiCoO 2.. EPS were proved to be a factor for the

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US2829964A - Cyclic leaching process employing iron ...

Cyclic leaching process employing iron oxidizing bacteria Download PDF Info Publication number US2829964A. US2829964A US542387A US54238755A US2829964A US 2829964 A US2829964 A US 2829964A US 542387 A US542387 A US 542387A US 54238755 A US54238755 A US 54238755A US 2829964 A US2829964 A US 2829964A Authority US

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Mechanism underlying the bioleaching process of LiCoO 2

Benefiting from lower operational costs and energy requirements than do hydrometallurgical and pyrometallurgical processes in metal recovery, the bioleaching of LiCoO 2 through the use of sulfur-oxidizing and iron-oxidizing bacteria has drawn increasing attention. However, the bioleaching mechanism of LiCoO 2 has not been clearly elaborated. In the present study, the

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A novel and clean process for extracting tellurium and ...

2020-1-1  Besides, FeCl 3 in the metal leaching process has an advantage as an oxidizing agent because it can be recycled by chlorination. In recent years, global demand for tellurium and bismuth has increased rapidly ( Candelise et al., 2012 ; Rocchetti and Beolchini, 2015 ).

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(PDF) Bioleaching: A microbial process of metal recovery ...

2022-1-5  Further applications of the bacterial thin-layer leaching process to Cerro Colorado and Qucbrada Blanca ores in North Chile are being studied. ... A new

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Bioleaching - an overview ScienceDirect Topics

In this process, acidophilic iron- or sulfur-oxidizing microorganisms such as Acidithiobacillus ferrooxidans and A. thiooxidans generate ferric iron and sulfuric acid [28]. Biogenic ferric iron is an additional oxidizing agent for acid-soluble sulfide minerals, while sulfuric acid provides acidic conditions for the growth of acidophiles ...

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US8859249B2 - Process of treatment for oxidizing an

A method for producing an iron (III) ion from the acidic solution containing an iodide ion and an iron (II) ion efficiently and stably is provided. The method including performing the following steps (a)-(b), repeatedly and continuously: (a) a step wherein the iron (II) ion in the acidic solution containing the iodide ion and the iron (II) ion is oxidized into iron (III) ion in a reactor using ...

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Comparative Study of Iron-Oxidizing and Sulfur-Oxidizing ...

2020-1-16  Furthermore, 18.1% of TN, 63.3% of TP, 65.4% of TK, and 45.6% of TOC were leached from the PM in the sulfur-oxidizing bioleaching process, whereas only 21.6% of TN, 32.8% of TP, 4% of TK, and 49% ...

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Mechanism underlying the bioleaching process of LiCoO2

2019-9-1  The bioleaching mechanism of LiCoO 2 was explored by using sulfur- and iron-oxidizing bacteria.. The lithium in the LiCoO 2 was dissolved by acid.. The cobalt in the LiCoO 2 was released by the reduction of Fe 2+ and acid dissolution.. Bacteria could produce acid by oxidizing pyrite to promote the dissolution of LiCoO 2.. EPS were proved to be a factor for the

More

Manipulation of pyrite colonization and leaching by iron ...

In this study, the process of pyrite colonization and leaching by three iron-oxidizing Acidithiobacillus species was investigated by fluorescence microscopy, bacterial attachment, and leaching assays. Within the first 4-5 days, only the biofilm subpopulation was responsible for pyrite dissolution. P

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A novel and clean process for extracting tellurium and ...

2020-1-1  Besides, FeCl 3 in the metal leaching process has an advantage as an oxidizing agent because it can be recycled by chlorination. In recent years, global demand for tellurium and bismuth has increased rapidly ( Candelise et al., 2012 ; Rocchetti and Beolchini, 2015 ).

More

Extraction of Molybdenum from Spent HDS Catalyst by ...

2021-8-20  Molybdenum can be recovered by the process of direct oxidizing acid leaching or oxidizing roasting followed by acid leaching. However, the solubility of molybdenum acid is low, only 0.023 mol/L Mo at room temperature with 1 mol/L H + , so high molybdenum leaching can only be obtained at a high liquid–solid ratio. Compared with acid leaching ...

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Progress, Challenges, and Perspectives of Bioleaching for ...

2021-5-7  The essence of the biological leaching process is that Thiobacillus acquires the energy needed for growth by oxidizing reduced sulphur compounds, which leads to a decrease in the pH value and changes in the redox

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(PDF) Bioleaching: A microbial process of metal recovery ...

2022-1-5  Further applications of the bacterial thin-layer leaching process to Cerro Colorado and Qucbrada Blanca ores in North Chile are being studied. ... A new species of ferrous-iron-oxidizing ...

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Bio-oxidation behavior of pyrite, marcasite, pyrrhotite ...

2021-9-1  Sulfur-oxidizing microorganisms (SOMs) and iron-oxidizing microorganisms (IOMs) ... The pH value is only adjusted for bio-oxidation and for the control of leaching process over the first day. Fig. 2a shows that the pH values are almost in the control leaching test are steady. For pyrrhotite, the increase of pH can be associated to the presence ...

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Hydrometallurgical Recovery of Metals from Large Printed ...

2015-9-29  No significant reaction should occur between Cu and HCl because HCl is a non-oxidizing acid 24. During the leaching process, the oxygen from the surrounding atmosphere enters the solution and acts ...

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Ammonia-oxidizing archaea are integral to nitrogen

2021-6-1  Nitrification is a central process in the global nitrogen cycle, carried out by a complex network of ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), complete ammonia-oxidizing ...

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Manipulation of pyrite colonization and leaching by iron ...

In this study, the process of pyrite colonization and leaching by three iron-oxidizing Acidithiobacillus species was investigated by fluorescence microscopy, bacterial attachment, and leaching assays. Within the first 4-5 days, only the biofilm subpopulation was responsible for pyrite dissolution. P

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The mechanisms of pyrite oxidation and leaching: A ...

The ozone and ultrasound pretreatment prominently increased the leaching percentage of gold from 49.12% to 93.52% and the leaching percentage of silver from 4.01% to 61.25% after 4h.

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Extraction of Molybdenum from Spent HDS Catalyst by ...

2021-8-20  Molybdenum can be recovered by the process of direct oxidizing acid leaching or oxidizing roasting followed by acid leaching. However, the solubility of molybdenum acid is low, only 0.023 mol/L Mo at room temperature with 1 mol/L H + , so high molybdenum leaching can only be obtained at a high liquid–solid ratio. Compared with acid leaching ...

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Processes Free Full-Text A Novel Technology for ...

2019-6-18  In this work, oxidizing roasting was combined with leaching to separate copper, lead, and zinc from a concentrate obtained by bulk flotation of a low-grade ore sourced from the Jiama mining area of Tibet. The flotation concentrate

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Recovery of Pd as PdO from Pd/SiO2 catalyst by leaching ...

2021-5-19  The leaching efficiency of Pd improved with an increase in temperature, time, and introduction of H 2 O 2 as an oxidizing agent. A leaching efficiency of 100% for Pd was successfully achieved by leaching 3 M HCl and 5 vol% H 2 O 2 into a Pd solution at 80 °C for 120 min with pulp density of 50 g/L. In the recovery process, the powder ...

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Dissolution of Palladium Metal in Solvent Leaching System ...

The solvent leaching systems consisted of concentrated hydrochloric acid solution and commercial extractants such as tributyl phosphate (TBP), 7-hydroxydodecan-6-one oxime (LIX 63), and di-n-octyl sulfide (DOS) in the presence of H2O2 as an oxidizing agent. Among the three systems, TBP showed the best efficiency for the dissolution of Pd.

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(PDF) Bioleaching: A microbial process of metal recovery ...

2022-1-5  Further applications of the bacterial thin-layer leaching process to Cerro Colorado and Qucbrada Blanca ores in North Chile are being studied. ... A new species of ferrous-iron-oxidizing ...

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Bioleaching mechanism of Co and Li from spent lithium

The bioleaching mechanism of Co and Li from spent lithium-ion batteries by mixed culture of sulfur-oxidizing and iron-oxidizing bacteria was investigated. It was found that the highest release of Li occurred at the lowest pH of 1.54 with elemental sulfur as an energy source, the lowest occurred at t

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Process for in-situ leaching of uranium - Mobil Oil ...

Process for the in-situ leaching of uranium from a subterranean ore deposit employing a lixiviant containing a carbonate leaching agent and an oxidizing agent. The lixiviant is heated to a temperature of at least 110° F. prior to injection into the subterranean ore deposit.

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Hydrometallurgical Recovery of Metals from Large Printed ...

2015-9-29  No significant reaction should occur between Cu and HCl because HCl is a non-oxidizing acid 24. During the leaching process, the oxygen from the surrounding atmosphere enters the solution and acts ...

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