Environmentally Friendly Leaching of Antimony from Mining …
This paper focuses on the environmental leaching of antimony, a critical mineral, using deep eutectic solvents. Mining residues often contain embedded antimony, posing environmental risks. Deep eutectic solvents, known for being low in toxicity, cost-effective, and environmentally friendly, present a promising avenue for sustainable …
Identification of antimony- and arsenic-oxidizing bacteria …
Antimony (Sb) is a naturally occurring toxic element commonly associated with arsenic (As) in the environment and both elements have similar chemistry and toxicity. Increasing numbers of studies have focused on microbial As transformations, while microbial Sb interactions are still not well understo …
Metagenomic analysis of Fe(II)-oxidizing bacteria for Fe(III) mineral …
The gradient tube method was used to enrich microaerophiles from the inocula of paddy soil using FeS, FeCO 3, or Fe 3 (PO 4) 2 separately, and agarose only (without Fe(II) addition) over a 15-day incubation period. After three days of incubation, cell growth was notable as distinct colored bands that formed approximately 0.6–1.0 cm …
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 …
The distinction between ore processing and post …
Antimony(III) bound to S was present in the ore as stibnite and sulfosalts, but these Sb ore minerals were completely converted in the roaster (Fawcett and Jamieson, 2011). Also, in micro-XANES ...
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
Antimony redox processes in the environment: A critical …
The reaction proceeds via initial adsorption of Sb(III) onto the minerals, followed by electron transfer resulting in oxidation of Sb(III) to Sb(V) and reduction of …
A review of the environmental chemical behavior, detection and
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 − ...
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 …
Dissolution of Ruthenium Metal by Combined Oxidizing and Reducing
The dissolution procedure consisted of two steps: (i) oxidation of Ru metal to RuO 4 – by using pure NaClO solution; (ii) reduction of RuO 4 – to stable Ru 2 OCl 10 4– by using HCl as a reducing agent. The role of NaClO and HCl in the dissolution of Ru metal was discussed on the basis of the potential-pH diagram and the corresponding ...
Biotechnology of Concentrate and Antimony Ore Processing
The results are presented for using microorganisms for mercury and antimony separation and extraction of oxidized antimony minerals. The problems on technology of direct processing of gold ...
(PDF) Antimony Production and Commodites
controlled volatilization of antimony metal in an oxidizing fur nace. It is used in halogen ... mineral processing of antimony. ... Motoo, W., 1974, "Equilibrium in Reduction of Antimony Oxide ...
A mechanistic analysis of the influence of iron‐oxidizing …
Microscale zero-valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron-oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments. RESULTS
Understanding the Weathering Process of Antimony Minerals…
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 reducing conditions can lead to release and mobilization of Sb, As, and Pb into the environment. Keywords. Sb deposits
Efficiency and mechanisms of antimony removal from
1. Introduction. Antimony (Sb) is a metalloid in the pnictogen group of the periodic table. Its compounds have been mainly used in many industrial products worldwide, such as batteries, solders, and catalysts [1].Trivalent and pentavalent forms of Sb are its most principal oxidation states in the water environment, and solubility of Sb(V) are …
Efficiency and mechanisms of antimony removal from …
Biogenetic iron oxide minerals from iron corrosion by iron-oxidizing bacteria may prove promising for antimony adsorption, while the micro-environment generated from iron corroding bacteria may provide better growth conditions for …
Antimony redox processes in the environment: A critical …
Antimony-oxidizing bacteria alleviate Sb stress in Arabidopsis by attenuating Sb toxicity and reducing Sb uptake. Gu, Tianyuan; Yu, Huang; Li, Fang; …
Microbial Transformations of Antimony | SpringerLink
Sb naturally co-occurs with about 120 minerals, of which Sb is primarily in the forms of Sb 2 S 3 and Sb ... Nitrate can be an alternative electron accepter in the anaerobic Sb(III) reduction process. The coupling of Sb(III) ... (2015) Antimony-oxidizing bacteria isolated from antimony-contaminated sediment-a phylogenetic study. Geomicrobiol J ...
Synergistic promotion of antimony transformation in the …
As one of the important microorganisms in the mining area, the role of iron-sulfur oxidizing microorganisms in antimony (element symbolized as Sb) migration and transformation in mining environments has been largely neglected for a long time. ... 1 School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of ...
A Review on Pyrometallurgical Extraction of Antimony from …
In the smelting process, antimony sulfide is volatilized and oxidized (producing ATO) at high temperatures, and discharged with gangue materials from the …
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 …
Preparation of Antimony Metal by Carbothermal Reduction of Antimony
Antimony is often used as a hardener for alloys. There are few studies on the preparation of antimony from Sb2O3 by microwave carbothermal reduction. In this study, Sb2O3 was used as the raw material, and the resonant cavity perturbation method was used to select anthracite as the reducing agent according to the microwave absorption of the material …
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 (> ...
Dispersion of antimony from oxidizing ore deposits
The main ore minerals of antimony are antimonite and jamesonite. The extensive mining and use of antimony have led to its introduction into the bio-sphere, where it can be hazardous, depending on ...
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. Experiments were conducted at laboratory scale on a refractory gold-bearing stibnite …
A Critical Review of Resistance and Oxidation Mechanisms of …
Especially, antimony-oxidizing bacteria can promote the release of antimony from ore deposits to the wider environment. ... The purpose of this paper is to provide a theoretical basis for understanding the role of Sb-oxidizing bacteria in the process of Sb geochemical cycle, to prevent and control Sb pollution at their source and …
Efficiency and mechanisms of antimony removal from
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 ...
REE geochemistry of gangue minerals and their geological
The Muli antimony deposit is located in the Au–Sb polymetallic metallogenic belt in south-eastern Yunnan, China. In this paper, we investigated the concentrations of trace elements in gangue minerals, mainly calcite, quartz, and pyrite, which were formed at different metallogenic stages. Meanwhile, the host rocks, …
Mobilization and transformation of antimony in stibnite by …
Microorganisms play a crucial role in the oxidation process of metallic sulfide minerals, leading to the release of metal ions into surrounding soil or water systems. ... Since the first discovery of an antimony-oxidizing bacterium, Stibiobacter senarmontii, reported in 1974 (Lialikova, 1974), more and more bacteria strains have been reported ...
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. …