In 2011, an artificial hook-shaped peninsula of 128 ha beach area was created along the Dutch coast, containing thousands of iron ore lumps, which include arsenic from natural origin. Elemental arsenic and inorganic arsenic induce a range of toxicological effects and has been classified as proven human carcinogens. The …
The high grade iron ore has depleted necessitating the need to investigate the use of low grade ores that may include arsenic-containing iron ores. ArsenicArsenic (As) is volatile increasing the possibility of its removal from the ore by roasting or...
Extracting iron while minimizing the health and environmental risks associated with arsenic contamination necessitates the removal of arsenic from arsenic-bearing iron ores to ensure a safe and sustainable supply of this metal for industries. The beneficiation ...
Understanding the As(III) oxidative performance of MnO 2 polymorphs (α, β, and γ) and synthesis of an efficient nanocomposite of iron ore slime derived 2-line ferrihydrite and γ-MnO 2 for sequestration of total arsenic from aqueous solution
Request PDF | Study of the arsenic adsorption properties on modified manganese ore of iron ore | The management and restoration of Arsenic pollution, which is urgent to be solved currently, has ...
Arsenic is widespread in the environment where it occurs combined with metals and sulfur and as secondary minerals in combination with oxygen. Its atomic structure allows it to be trivalent or pentavalent, and its properties lead to its classification as a metalloid in the periodic classification of the elements. Arsenic xide is a by-product …
Colocalization of arsenic, NOM, iron oxide, and sulfur A special emphasis is placed here on the analysis of the spatial distribution of secondary ions and the statistical treatment for the colocalization between elements.
This study aimed to utilize indigenous iron ore for the reduction of arsenic from contaminated water. In this regard, iron ore was chemically activated through hydrogen peroxide to enhance its adsorption potential.
The efficient removal and recovery of arsenic from copper smelting flue dust have received widespread attention due to its extremely high toxicity and carcinogenicity.
Due to the increase in steel production in the world and the depletion of high-grade ore resources, there is a need to investigate the use of low-grade ores that includes arsenic-containing iron ores. Arsenic (As) is volatile, and As removal from the ore by roasting or sintering is limited because of many chemical interactions with other …
Sequential washing techniques using single or dual agents [sodium hydroxide (NaOH) and hydrochloric acid (HCl) solutions] were applied to arsenic-contaminated soils in an abandoned iron-ore mine area.
Arsenopyrite is an iron arsenic sulfide with a chemical composition of FeAsS. It is the most abundant arsenic-bearing mineral and the primary ore of arsenic metal. It is associated with other sulfide minerals in organic-rich sedimentary rocks, metamorphic rocks, and igneous rocks in many parts of the world.
In most cases, arsenic is an unfavorable element in metallurgical processes. The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite-bearing iron ore. Thermodynamic calculation of arsenic recovery was carried out by FactSage 7.0 software (Thermfact/CRCT, Montreal, Canada; GTT …
Substantial quantities of openly dumped slag contribute to the absence of recovery and utilization of valuable metals as well as potential environmental pollution to water and soil. Owing to the excessively high arsenic content present in iron extracted from copper smelting slag, we propose a new arsenic removal process in this paper. The …
Arsenopyrite is an iron arsenic sulfide with a chemical composition of FeAsS. It is the most abundant arsenic-bearing mineral and the primary ore of arsenic metal.
The pretreatment technology of high refractory arsenic Au ore is an inevitable approach for gold recovery. The processing is related to arsenic wastes generation either in the form of solid residues or as effluent streams.
Arsenic is a gray metal rarely encountered as a free element, but is widely distributed in minerals and ores that contain copper, iron and lead. Arsenic is often found in groundwater as a result of the natural weathering of rock and soil.
The most common arsenic mineral is arsenopyrite, a compound of iron, arsenic, and sulfur. Several other, less-common minerals contain arsenic, including orpiment, realgar, and enargite, which are arsenic sulfides.
The affinity of arsenic (As) with iron (oxyhydr)oxides is known, at least, since 1835, when Robert Bunsen used iron hydroxides to revert As poisonings [1].Since then, technologies utilizing iron oxides and (oxyhydr)oxides for As removal and fixation are applied worldwide.
Indigenous hematite iron ore was chemically activated as a function of various hydrogen peroxide concentrations (0.5, 1, 1.5, and 2.0 M), activation time, and iron ore size. Adsorption potential was evaluated at various initial arsenic concentrations, contact time, adsorbent dose, and particle size. …
Microorganisms can also indirectly participate in the biogeochemical cycling of arsenic. Iron–sulfur-oxidizing microorganisms form acidic environments by oxidizing iron and sulfur elements in ores, resulting in the release of arsenic from ores, which are the main sources of arsenic pollution in mines (Wu et al., 2021). Microbial-mediated ...
The experimental results revealed that the arsenic in arsenopyrite-bearing iron ore can be removed in the form of As2O3 (g) in an air or nitrogen atmosphere by a …
Overall results demonstrated that MPAN adsorbent is better than the iron ore adsorbent for the treatment of both As +3 and As +5 . Comparative studies of PAN Fiber and iron ore adsorbents revealed that PAN fibers had better adsorption properties than iron ore for As +3 and As +5 in terms of percentage removal and capacity.
Limited quantities of arsenic metal have been recovered from gallium-arsenide semiconductor scrap. [23] Arsenic may also be obtained from copper, gold, and lead smelter flue dust as well as from roasting arsenopyrite, the most abundant ore mineral of arsenic. However, arsenic is not recovered from these sources
This arsenic-driven gold pump explains how these iron sulfides can massively capture and then release gold, so controlling ore deposit formation and distribution.
In most cases, the release of arsenic from sediment was caused by microbial reductive dissolution of arsenic-bearing iron(III) minerals with organic carbon …
Extracting iron while minimizing the health and environmental risks associated with arsenic contamination necessitates the removal of arsenic from arsenic-bearing iron ores to …
Arsenic and arsenic compounds were considered by previous IARC Working Groups in 1979, 1987, and 2002 (IARC, 1980, 1987, 2004). ... antimony, cobalt, and iron. Arsenic is present in more than 200 mineral species, the most common of which is arsenopyrite. ... iron and steel mills and ferro-alloy manufacturing, oil and gas extraction, metal ore ...
The arsenic content in the iron ore concentrate and scrap steel used by the steelworks was 30 mg/kg and 220 mg/kg, respectively, which were considered low levels of arsenic content for raw materials. The arsenic content in higher-quality iron ore ranged from 25 mg/kg to 30 mg/kg (Fang and Liu, 2015).
In this study, sequential washing techniques using single or dual agents (NaOH and hydrochloric acid) were applied for arsenic-contaminated soils in an abandoned iron-ore mine area. Arsenic-containing iron-ore fines in this area can produce mobile colloids through coagulation and flocculation in natural waters contacting the soils …
The experimental results revealed that the arsenic in arsenopyrite-bearing iron ore can be removed in the form of As2O3 (g) in an air or nitrogen atmosphere by a roasting method. The efficiency of arsenic removal through roasting in air was found to …
Abstract. Impact of arsenic (As) contaminated groundwater on human health, through drinking and irrigation practices, is of grave-concern worldwide. This paper …
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