Treating of antimony mine drainage: challenges and opportunities with
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 ...
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Synergistic promotion of antimony transformation in the …
In mines, Sb-bearing minerals are frequently associated with other sulfide minerals such as pyrite, and this association promotes the dissolution release of Sb from the minerals under certain conditions (Wilson et al., 2004; Yan et al., 2020).Simultaneously, pyrite is also involved in the redox process of Sb(III) via reactive oxygen species produced during its …
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Processing of antimony minerals by oxidizing and reducing …
The objectives of this work were to evaluate the use of iron- and sulphur-oxidising bacteria Acidithiobacillus ferrooxidans and sulphate-reducing bacteria Desulfovibrio desulfuricans in the biohydrometallurgical processing of gold-bearing antimony sulphide minerals.
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Reduction of antimony mobility from Sb-rich smelting slag …
The concentrations of Total Sb in the iron-free and iron-added groups were largely decreasing in 0–48 h, and tended to be stable in 48–72 h (Fig. 1 D,F), which was caused by the adsorption of antimony by S. oneidensis.SEM results of S. oneidensis before and after reaction with antimony in the iron-free group were shown in Fig. 2 A,B. After the reaction with …
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METHODS FOR PROCESSING OF ANTIMONY …
antimony sulfide concentrates to obtain metallic antimony and antimony xide are discussed, and methods of refining antimony from impurities are also analyzed. Keywords: antimony, …
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Dissimilatory Antimonate Reduction and Production of Antimony …
Antimony (Sb) is a metalloid that has been exploited by humans since the beginning of modern civilization. The importance of Sb to such diverse industries as nanotechnology and health is underscored by the fact that it is currently the ninth-most mined metal worldwide. Although its toxicity mirrors that of its Group 15 neighbor arsenic, its …
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Kinetics of antimony biogeochemical processes under pre …
This suggests that the adsorption process of Sb on Fe–Mn minerals was much faster than that of the reduction process. The decrease in the HCl-extracted Fe(III) under anaerobic conditions provides evidence of the reduction of amorphous Fe(III) (Heron et al., 1994). The increase in HCl-extracted Fe(III) under aerobic conditions indicates that ...
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Efficiency and mechanisms of antimony removal from …
Recently, removal of metals ions from acid mine wastewater by sulfate-reducing bacteria (SRB) has become a creative method [25], [26]. It was proved that Sb(V) in wastewater could be reduced to Sb(III) by S 2− resulting from sulfate reduction by SRB, and precipitated as stibnite (Sb 2 S 3) [27].Generally, SRB was one kind of strict anaerobic bacteria, and dissolved …
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Three Methods To Antimony Ore Beneficiation And Processing
The specific process flow needs to be designed according to the nature and characteristics of the ore. This process flow is a general process flow and is universal. The specific mineral processing process needs to provide antimony ore samples from the customer to determine the best mineral processing plant. The selection of suitable antimony ...
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"Understanding the Weathering Process of Antimony …
Based on these findings, we argue that sources of toxic elements and weathering process in Sulzburg are important from the ecotoxicity perspective. Changes in oxidizing or …
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METHODS FOR PROCESSING OF ANTIMONY …
The article presents the results of scientific developments in the field of pyro- and hydrometallurgical processing of antimony-containing mineral and technogenic raw materials. Important industrial antimony products are metallic ... ores and antimony concentrates is realized by reducing melting in the presence of carbon: Sb 2 O 3 + 3C=2Sb +3CO ...
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Identification of Antimony- and Arsenic-Oxidizing Bacteria …
Antimony (Sb) is a naturally occurring toxic element and is considered to be a priority pollutant of interest by the USEPA (the maximum contaminant level in drinking water is 6 μg L −1).Although the concentrations of Sb in natural systems are generally low (less than 1 mg kg −1 in soil and 1 μg L −1 in surface waters []), elevated levels of Sb have been released via …
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(PDF) Processing of Antimony at the Sunshine Mine
antimony ions are freed by the electrowinning cathode process. This al-Iows recycle back to the leach step where the free sulfide solubilizes additional antimony.
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Treatment of antimony mine drainage: challenges and
The present article summarizes antimony mine distribution, antimony mine drainage generation and environmental impacts, and critically analyses the remediation approach with special …
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Microbial reduction of schwertmannite by co-cultured iron
These findings allow for a better understanding of the process and mechanism of microbial mediated reduction of Sch in the environment. ... Sch is a bioavailable iron oxyhydroxysulfate mineral prone to dissimilatory reduction by Fe 3 ... (pH 2.5–3.5) and strongly oxidizing conditions, however, researches further showed that Sch ...
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"Understanding the Weathering Process of Antimony Minerals…
Changes in oxidizing or reducing conditions can lead to release and mobilization of Sb, As, and Pb into the environment. ... Raphael (2018) "Understanding the Weathering Process of Antimony Minerals: Case Study Sb-Mine Sulzburg, Black Forest, Germany," Applied Environmental Research: Vol. 40: No. 2, Article 1. Available at: https://digital.car ...
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Antimony precipitation and removal by antimony hyper …
Antimony (Sb) is widely used in the manufacturing of semiconductors, diodes, flameproof retardants, lead hardener, batteries, small arms, tracer bullets, automobile brake linings, and pigments, which results in serious antimony contamination in the environments (Nishad and Bhaskarapillai, 2021).Sb contamination may also be introduced into the …
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Bioremediation of antimony from wastewater by sulfate-reducing bacteria
Metal sulfide precipitation by sulfate-reducing bacteria (SRB) is considered to be a promising method for antimony (Sb) removal from wastewater. Moreover, the addition of ferrous ions (Fe(II)) to the SRB system is expected to increase the metabolic activity of SRB. In this study, batch microcosms of SRB, with 0–600 mg/L Fe(II), are used to assess the effect of Fe(II) on …
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Treatment of antimony mine drainage: challenges and …
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 symbiotic sulfate reducing bacteria.
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Oxidizing Roast; Stibnite the Antimony Mineral
The leading antimony mineral is stibnite. In smelting stibnite ore two processes are available, precipitation and roasting-reduction. The former is suited, only for high-grade ores. As low-grade ores are more common than high-grade, roasting-reduction is of greater importance than precipitation.
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Selective recovery of antimony from Sb-bearing copper …
The challenges arising from the presence of Sb, Bi and As in copper metallurgy have been widely reviewed (Awe and Sandström, 2013; Thanu and Jayakumar, 2020; Torres et al., 2022).The adverse effects of these impurities on the quality of copper metal underscore the need for special attention to limit their presence at low levels in the final cathode.
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the coupling of iron and typical antimony oxidizing …
19 Abstracts: Antimony oxidizing bacteria (SbOB) and iron oxides are the main driving factors to the 20 weathering dissolution and oxidation of stibnite (Sb2S3) waste ore. The characteristics of the dissolution and 21 oxidation process of stibnite in the absence of strain AO-1 and iron oxides, Pseudomonas sp. AO-1-mediated
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Antimony in the metallurgical industry: A review of its …
Like most mineral processing, antimony ore processing consists of ore crushing, grinding, classification (gravity separation and cyclones) and flotation. ... (OH) 6 − and Sb(OH) 3 o as the dominant species in oxidizing and reducing conditions, respectively, over the environmental pH range (5–9). For concentrated systems (> ...
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Kinetic Fractionation of Antimony Isotopes during …
input includes mining and processing of antimony-containing ores and the production of antimony metal.1 Sulfide minerals such as stibnite are commonly mined for Sb extraction, and the tailings left behind from this process are vulnerable to leaching.2 Monitoring of Sb contamination in the
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Antimony-oxidizing bacteria alleviate Sb stress in …
Aims Antimony (Sb)-oxidizing bacteria play an important role in Sb biogeochemical cycle in soil, but the benefits of microbial oxidation for plants have not been well documented. The aim of this study was to explore the contribution of Sb(III)-oxidizing bacteria to alleviate the Sb toxicity in plants. Methods The plant growth-promoting (PGP) characteristics …
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Toxic effects of antimony in plants: Reasons and …
Stomata closure is an important physiological process, and Sb stress-induced closing of stomata reduces ... These authors also found that NO 3-also inhibited the reduction dissolution of iron minerals and resulted in a substantial reduction in Sb ... Isolation and characterization of antimony-reducing bacteria from sediments collected in the ...
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Mechanism of dissolution and oxidation of stibnite mediated …
Antimony oxidizing bacteria (SbOB) and iron oxides are the main driving factors to the weathering dissolution and oxidation of stibnite (Sb 2 S 3) waste ore.The characteristics of the dissolution and oxidation process of stibnite in the absence of strain AO-1 and iron oxides, Pseudomonas sp. AO-1-mediated (AO-1-mediated), Fe (Fe, Fe 2 (SO 4) 3, and FeS 2) …
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Reaction pathways and Sb(III) minerals formation during the reduction …
Antimony (Sb), a non-essential metalloid, can be released into the environment through various industrial activities.Sb(III) is considered more toxic than Sb(V), but Sb(III) can be immobilized through the precipitation of insoluble Sb 2 S 3 or Sb 2 O 3.In the subsurface, Sb redox chemistry is largely controlled by microorganisms; however, the exact mechanisms of …
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Bioremoval of arsenic and antimony from wastewater by a …
We investigated the remediation of wastewater containing As and Sb through the application of a mixed culture of sulfate-reducing bacteria (SRB). The effect of Fe(II) and different carbon sources on the removal of As and Sb was evaluated. The wastewater initially contained 5 mg L −1 of both As(V) and Sb(V), and the treatment was conducted over a 12-d period.
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Microbial Transformations of Antimony | SpringerLink
Microorganisms are one of the main drivers of Sb transformation, which is closely associated with its mobility, toxicity and bioavailability. This chapter examines Sb biotransformation processes …
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