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Antimony is a dissolved state in water that has a strong migration ability, and when antimony is adsorbed to particles or sediments in water, its migration ability will be reduced. The reduction process can release antimony from sediments into the water environment. The transformation process of antimony is Sb(III) → Sb(V) → Sb(OH) 6 − ...
Biogenetic iron oxide minerals from iron corrosion by iron-oxidizing bacteria may prove promising for antimony adsorption, while the micro-environment generated from iron corrosion by iron oxidizing bacteria may provide better growth conditions for …
Anaerobic microbial iron oxidation and reduction contributes significantly to soil and sediment biogeochemistry and mineralogy in anaerobic environments. Here, Weber and colleagues review the ...
Native gold and its satellite minerals were studied throughout the 300 m section of oxidized ores of the Olympiada deposit (Eastern Siberia, Russia). Three zones are identified in the studied section: Upper Zone ~60 g/t Au; Middle Zone ~3 g/t Au; Lower Zone ~20 g/t Au. Supergene and hypogene native gold have been found in these zones. …
The choice of methods for depressing antimony minerals in complex sulphide ores depends on what kind of mineral is the predominant impurity. It ought to be possible …
This article investigates the behavior of tin and antimony, both commonly present as trace elements in electrical and electronic waste, in secondary (i.e., sulfur-free) copper smelting conditions. The experiments were conducted in oxygen partial pressure range of 10 −10 –10 −5 atm, covering the different process steps in copper smelting.
@article{osti_1915396, title = {Antimony redox processes in the environment: A critical review of associated oxidants and reductants}, author = {Zhang, Yidan and O'Loughlin, Edward J. and Kwon, Man Jae}, abstractNote = {The environmental behavior of antimony (Sb) has recently received greater attention due to the increasing global use of …
The objective of this research was to study the precipitation of Sb and the stability of Sb 2 S 3 during treatment of synthetic Sb(V) wastewater by sulfate-reducing bacteria (SRB). We investigated the transformation and precipitation of Sb, as well as the re-dissolution of Sb 2 S 3 under different pH and carbon sources. The results showed that …
The left antimony existing in the roasted products can be reclaimed through a process of reduction roasting and dust collection. XRD pattern of the high arsenic-bearing flue dust. Mineral phase's ...
Removal of antimony from wastewater is essential because of its potential harm to the environment and human health. Nano–silica and biogenic iron (oxyhydr)oxides composites (BS–Fe) were prepared by iron oxidizing bacteria (IOB) mediation and the batch adsorption experiments were applied to investigate antimonite (Sb(III)) and …
Antimony and natural Sb-bearing sulfides were found as early as 4000 BCE. Up to date, a variety of industrial operations such as production of paint pigments, flame retardants, plastics, glassware and ceramics, and alloys in ammunition and battery manufacturing plants extensively utilize Sb; as a result the global consumption of Sb has …
Microorganisms mediate the S-oxidizing Sb(V) reduction process Multiple lines of evidence indicate that S-oxidizing Sb(V) reduction, a novel biogeochemical process, is mediated by indigenous ...
Biogenetic iron oxide minerals from iron corrosion by iron-oxidizing bacteria may prove promising for antimony adsorption, while the micro-environment generated from iron corrosion by iron...
In this study, Pseudomonas aeruginosa PA-1, a manganese-oxidizing bacterium screened from the soil at a manganese mining area, was found to be tolerated to Sb(III) stress during the Mn(II) oxidation, and the generated biological manganese oxide (BMO) outperformed the identical type of Abiotic-MnOX in terms of oxidation and …
Dispersion of antimony from oxidizing ore deposits* ... Sulfide and sulfosalt minerals mostly form deep in the Earth at high temperatures and under compara-tively reducing conditions. They remain stable as long as they are protected from oxygen but, with few ... eral process has a very important consequence with respect to solubility …
Introduction Section snippets References (58) Separation and Purification Technology Volume 246, 1 September 2020, 116756 Efficiency and mechanisms of …
In this review, we summarize the recent research on bacterial antimony transformations, especially those regarding antimony uptake, efflux, antimonite …
Abstract: This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted. CO–CO2 mixture gas was used as reducing agent, and the antimony-containing phase was reduced into Sb4O6, volatilized into smoke, and finally recovered through the cooling cylinder.
Some Sb- and As-bearing minerals are closely related, e.g., stibnite (Sb 2 S 3) ... Nitrate can be an alternative electron accepter in the anaerobic Sb(III) reduction process. The coupling of Sb(III) ... Lee JU (2015) Antimony-oxidizing bacteria isolated from antimony-contaminated sediment-a phylogenetic study. Geomicrobiol J …
Toxic response of antimony in the Comamonas testosteroni and its applica- tion in soil antimony bioremediation Xiong Luo, Jiayi Guo, Yan Lan, Lijin An, Xiaoyan Zhang, Kaixiang Shi,
Under weathering conditions, antimony sulfide or stibnite (Sb 2 S 3), a sulfide mineral of antimony, will be rapidly oxidized and dissolved (Klimko et al., 2011; Maruška et al., 2000). Therefore, Sb 2 S 3 formed by the bioprecipitation (Wang et al., 2013) can be oxidatively dissolved by exposure to air during transportation.
In nature, there is a small amount of the simple substance of bismuth. The most common bismuth minerals include bismuthinite (Bi 2 S 3), bismutite (Bi 2 O 3 or bismite), copper bismuthinite (3Cu2S·4Bi2S3), plumbum bismuthinite (2PbS·Bi 2 S 3), and so on, among which Bi 2 S 3 and Bi2O3 are of the highest value. The bismuth minerals …
Methods of reducing melting and sulfide-alkaline leaching of antimony sulfide concentrates to obtain metallic antimony and antimony trioxide are discussed, and methods of …
The mineral processing of antimony Originally antimony was mined and hand sorted to effect concentration Since the bulk of primary production is in China, where labor is plentiful and cheap, surprisingly, hand sorting still finds a large application However, in recent years, many other unit operations are used in the mineral processing of
A review focused on the oxidation mechanisms of Sb(III)-oxidizing bacteria is also available recently (Deng et al., 2021b). The overall bioavailability of Sb in terrestrial ecosystems was reviewed by Bagherifam et al. (2019), while a review by Tschan et al. (2009) focused on uptake of Sb from contaminated soils by plants.
It can be seen from Eq. () that Sb 2 S 3 is deposited on the surface of gold particles, forming a dense product layer and hindering the diffusion of CN − and O 2 to the gold particles, leading to low leaching ratio [3, 4].Effect of Antimony on Pretreatment Process. The melting point of antimony compounds, generated in the roasting process …
An ecologically acceptable and yet economic alternative for processing of sulfidic low-grade ores, where metal sulfides cannot be concentrated economically by flotation, is the extraction of metals by means of microorganisms. This procedure is called biomining [ 18, 20 – 22, 38, 40, 124 – 127, 144, 150, 158, 179 ].
Microbial reduction of Fe(III) minerals is a prominent process in redoximorphic soils and is strongly affected by organic matter (OM). We herein determined the rate and extent of microbial reduction of ferrihydrite (Fh) with either adsorbed or coprecipitated OM by Geobacter sulfurreducens.We focused on OM-mediated effects on …
11.3. Manganese-oxidizing microbes and application in metals and other contaminants removal. Manganese (Mn), an important micronutrient occurring in oxidation states between −3 and +7, is required by most of the life forms. The manganese existing in oxidation states +2, +3, and +4 is biologically important form ( Brouwers et al., 2000).
Antimony is also widely used in metallic form in alloys and compounds, in lead alloys such as grids and terminals in lead-acid batteries to increase their hardness [4] [5] [6][7], and antimony ...
Much attention has been paid to improving the mineral processing technology of antimony oxide based on such experiments. This work presents the latest …
Oxidative dissolution of stibnite (Sb 2 S 3), one of the most prevalent geochemical processes for antimony (Sb) release, can be promoted by Sb-oxidizing microbes, which were studied under alkaline and neutral conditions but rarely under acidic conditions.This work is dedicated to unraveling the enhancement mechanism of stibnite …
This reducing process could produce S 2−, which could be precipitated with As or Sb. Moreover, Geobacter spp. are typical of Fe-reducing bacteria, and can be involved in the release of As and Sb from Fe (oxyhydr)oxide-bound fractions under anaerobic conditions (Yuan et al. 2019). The results indicated that the direct As/Sb …
Most commercial grades of antimony trioxide contain between 99.2% and 99.5% antimony trioxide with varying amounts of impurities such as arsenic, iron and lead. Commercial suppliers offer various grades of antimony trioxide. The mineral processing of antimony. Originally antimony was mined and hand sorted to effect concentration.
This process can exert a strong influence over the precipitation and sequestration of Sb in the form of insoluble mineral phases under both oxic and anoxic conditions. Future studies should focus on growing these and other Sb(III)-oxidizing organisms with a tartrate-free Sb(III) source, such as solid antimony trioxide, to confirm …
Environmental context Toxicity and mobility of antimony and arsenic in aqueous systems are largely determined by their speciation and redox chemistry. In a highly contaminated freshwater system, one antimony species (dissolved SbV) dominated, while dissolved arsenic was more responsive to environmental conditions. Arsenic (as AsV) …
