Sulfide Oxidation - 911metallurgist

    Sulfide Oxidation. Sulfate was the ultimate reaction product in both the laboratory and the field, a result of the pH and oxidizing conditions which prevailed, and the relatively long reaction time. The rate of sulfide oxidation observed in batch reactors was a function of available sulfide surface area, dissolved oxygen concentration,...

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    Oxidation reaction process of ferrous sulfide - ResearchGate

    The oxidation process can be divided into three stages: when temperature of the samples is below 70°C, incomplete oxidation reactions of ferrous sulfide take place; part of ferrous sulfide is ...

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    5.10C: Oxidation of Reduced Sulfur Compounds - Biology ...

    Sep 25, 2019 · The oxidation of sulfide occurs in stages, with inorganic sulfur being stored either inside or outside of the cell until needed. This two step process occurs because sulfide is a better electron donor than inorganic sulfur or thiosulfate; this allows a greater .

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    Gold Sulphide Ore Oxidation by Alkaline Pressure

    Table of ContentsExperimental ProceduresResults and DiscussionProposed Process Flowsheet The U.S. Bureau of Mines developed an alkaline oxidative pretreatment to increase the recovery of gold from refractory sulfide ores containing arsenopyrite (FeAsS) and/or pyrite (FeS2). Pretreatment of a low grade ore containing 0.4% FeAsS, 3.5% FeS2, and 2.74g/mt Au with 1.2M NaOH, 40 psig 02, 100° C ...

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    DMSO Oxidation - Yale Department of Chemistry

    Swern Oxidation: (1978) This later Swern procedure is a convenient method for the production of reagent 24 without using dimethyl sulfide and chlorine. Dimethyl sulfoxide, which is at the same oxidation level as salt 24, reacts with oxalyl chloride ( 23 ) .

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    Microbial sulfide removal - Water Technology Online

    Mar 24, 2017 · The oxidation of sulfide to sulfur utilizes only one-fourth the amount of oxygen that oxidation of sulfur to sulfate requires, as shown in equations 2, 3 and 4. These bacteria can, alternatively, use sulfide, sulfur or thiosulfate as the energy source while producing sulfate as the end-product because they fix carbon dioxide to make their biomass in a manner similar to the process in plants.

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    Ozone Treatment of Iron, Manganese and Sulfide Ion – Part ...

    Jul 21, 2008 · Oxidation of iron, manganese, sulfide and organic compounds Typically, iron and manganese are found in well water in the soluble ferrous iron (Fe 2+ ) and manganous (Mn 2+ ) forms. While both are divalent (consisting of two fewer electrons, thus a double positive electronic charge), iron can only be oxidized to ferric iron (Fe 3+) .

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    Flexicone technology for sulfide ores | flexicone

    Flexicone Oxidation Process. The Flexicone Oxidation technology is a combination of ultrafine grinding and the oxidation of sulphides with air. The process of atmospheric oxidation of sulphides occurs without the use of high temperatures (up to 100 ° C), at normal atmospheric pressure (open apparatus) and at an acidity of the medium close to neutral.

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    Microbial sulfide removal - Water Technology Online

    Mar 24, 2017 · These treatment methods include: Air stripping: Sulfide is highly volatile, and at slightly acidic pH,... Chemical oxidation: Many oxidants can be added to the sour water stream to oxidize sulfide. Chemical precipitation: The addition of iron salts will produce insoluble iron sulfides...

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    Sulfide Oxidation with Hydrogen Peroxide (H2O2)Sulfide Odor Control
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    Discrimination of chemical and biological sulfide ...

    Hybrid sulfide oxidation at 1000 mg l −1 (A), 2000 mg l −1 (B) and product distribution comparison (at day = 7) for chemical, biological and hybrid process (C). At 1000 mg l −1, complete sulfide depletion was observed after a one day abiotic phase alongside accumulation of partially oxidized products such as thiosulfate and OP as well as small amount of S 0, while no sulfate was detected.

    Author: Panteha Pirieh, Fereshteh Naeimpoor[DOC]
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    Removal of Hydrogen Sulfide - Tallahassee, FL · Web view

    Although the complete Hydrogens Sulfide oxidation mechanisms by this group of bacteria is unknown, Hydrogen Sulfide oxidation is believed to convert Hydrogen Sulfide to Sulfate. Biofilters are very easy to construct and consist of a blower to move Hydrogen Sulfide laden air, media support, PVC air distribution piping, and biofilter media.

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    Sulfide Oxidation as a Process for the Formation of copper ...

    Sulfide Oxidation as a Process for the Formation of copper-rich magmatic Sulfides. Typically, these types of sulfide assemblages occur in the upper parts of moderately to highly fractionated layered mafic–ultramafic intrusions, a well known example being the Pd/Au reef in the Upper Middle Zone of the Skaergaard intrusion.

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    Pyrophoric Iron Fires - Safety and Pressure Relief ...

    Iron sulfide is one such pyrophoric material that oxidizes exothermically when exposed to air. It is frequently found in solid iron sulfide scales in refinery units. It makes no difference whether these pyrophoric sulfides exist as pyrite, troilite, marcasite, or pyrrhotite.

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    Thermodynamics and Kinetics of Sulfide Oxidation by Oxygen ...

    Apr 09, 2011 · Sulfide oxidation kinetics of anaerobic photolithotrophic bacteria. Any minor sulfide loss is due to volatilization. The loss of sulfide over time with C. tepidum (3.3 × 10 9 cells mL −1) and light is linear with r2 = 0.949 versus a first order plot for the ln (sulfide) versus time giving r2 = 0.930.

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    Sulfide - Wikipedia

    Chemical reactionsEdit. Upon treatment with a standard acid, sulfide converts to hydrogen sulfide (H 2 S) and a metal salt. Oxidation of sulfide gives sulfur or sulfate. Metal sulfides react with nonmetals including iodine, bromine, and chlorine forming sulfur and metal salts.

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    Oxidation/Reduction Process - Water Filters

    When hydrogen sulfide contaminated water enters the Redox (Oxidation/reduction process) media filter, the copper in the Eagle Redox Alloy media loses an electron and the sulfur gains an electron and copper sulfide and water are formed. The copper sulfide is insoluble in water and can be backwashed off the Eagle Redox Alloy filter media.

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    Chemolithotrophy | Boundless Microbiology

    The oxidation of sulfide occurs in stages, with inorganic sulfur being stored either inside or outside of the cell until needed. This two step process occurs because sulfide is a better electron donor than inorganic sulfur or thiosulfate; this allows a greater number of protons to be translocated across the membrane.

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    Hydrogen Sulfide | Wastewater Treatment | Carus Corporation

    Permanganate oxidation treatment rapidly destroys hydrogen sulfide in wastewater and biosolids. Sulfide oxidation chemistry is very complex and the reaction can follow different pathways depending on the conditions encountered. In anaerobic systems, permanganate directly oxidizes hydrogen sulfide.

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    Bacterial oxidation - Wikipedia

    Bacterial oxidation. The bacterial oxidation process comprises contacting refractory sulfide ROM ore or concentrate with a strain of the bacterial culture for a suitable treatment period under an optimum operating environment. The bacteria oxidise the sulfide minerals, thus liberating the occluded gold for subsequent recovery via cyanidation .

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    METHOD 9030B ACID-SOLUBLE AND ACID-INSOLUBLE .

    Tin(II) chlorid e is present to prevent oxidation of sulfide to sulfur by the metal ion (as in copper(II)), by the matrix, or by dissolved oxygen in the reagents. The prepared sample is distilled under acidic

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