1.4. Environmental occurrence. Arsenic is the 20 th most common element in the earth's crust, and is emitted to the environment as a result of volcanic activity and industrial activities. Mining, smelting of non-ferrous metals …

A number of technologies are being used to capture and remove arsenic from smelting stacks and mine tailings. Air pollution can be controlled effectively using scrubbers, …

The 21-square mile Box area includes a former smelting facility that lies along I-90 in Northern Idaho's Silver Valley, encompassing the towns of Pinehurst, Smelterville, Wardner, and Kellogg, and the communities of Page, Ross Ranch, Elizabeth Park, and Montgomery Gulch. ... The lead smelting and arsenic refining operations …

Oxygen-rich side-blow bath smelting (OSBS) technology offers an efficient method for processing complex bismuth-lead concentrates; however, the element distributions in the process remain unclear. This work determined the distributions of elements, i.e., bismuth, lead, silver, copper, arsenic and antimony, in an industrial-scale …

Arsenic can be mobilized by dissolution into water or emitted into the atmosphere through natural processes as well as anthropogenic activity. Of the many …

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 …

Inorganic arsenic was used in the treatment of leukaemia, psoriasis, and chronic bronchial asthma, and organic arsenic was used in antibiotics …

Metalware and scraps were melted down and recast, but arsenic is a volatile element and can evaporate during the smelting process (Crawford, 2004; Shibayama et al., 2010). Repeated hot annealing of arsenic copper would gradually see a decline of the arsenic content and thus lead to degradation of the alloy (Greenfield, 2017; Mödlinger et al ...

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 …

Arsenic is found everywhere in natural surroundings. It is a well-known toxic element for all forms of life (Banerjee et al. 2011; Tripathi et al. 2007; Villadangos et al. 2012).The main sources of arsenic in nature are anthropogenic and natural activities (Mandal and Suzuki 2002).Arsenic is released in the environment, primarily by natural …

The lead may be refined through several processes, depending on the end use and the contained amounts of silver, gold and impurities such as copper, iron, arsenic, etc. ZINC SMELTING. Zinc is produced from concentrates of Calamine, Smithsonite, Zincite, Franklinite with principal production being from the sulfide mineral Sphalerite.

12.6 Primary Lead Smelting 12.6.1 General15 Lead is found naturally as a sulfide ore containing small amounts of copper, iron, zinc, ... concentrates that are high in impurities such as arsenic, antimony, and bismuth, as well ... which is high in silver content but low in lead and may have been dried elsewhere within the facility, coke fines ...

This is the first published study from South America to have recorded evidence of copper smelting slags that were fully liquid in furnaces apparently powered by blowpipes. The copper prills produced at 256A01 contained up to 5.5% arsenic, but we have found no evidence for deliberate addition of an arsenic-bearing mineral to the …

Most commercial arsenic is recovered as a by-product of the smelting of copper, lead, cobalt, and gold ores. Only one stable isotope of arsenic, that of mass 75, occurs in nature. Among the artificial radioactive isotopes is one of mass 76, which has a half-life of 26.4 hours. Arsenic-72, -74, and -76 have been used in medical diagnostic ...

Human activities have the potential to increase arsenic concentrations in the air, water, and soil. The rate of arsenic release from sulfide minerals can be accelerated by mining activities, which expose the minerals to weathering processes during excavation. Arsenic oxide dust is produced during copper and gold smelting, and coal combustion.

Table 1. indicate that the main elemental composition of the FS dust is copper, iron, sulfur, arsenic and zinc. The analyzed sample also include a nu mber of minor. elements, among them a relative ...

The overall decrease in the quality of mineral raw materials, combined with the use of arsenic-containing ores, results in large amounts of various intermediate products containing this highly toxic element. The use of hydrometallurgical technologies for these materials is complicated by the formation of multicomponent solutions and the difficulty of …

This work presents a systematic theoretical and experimental study on sulfurization roasting at low temperature for removal of arsenic from high-arsenic …

During the roasting and smelting of arsenic-bearing ores and concentrates, arsenic oxides, volatile compounds and large volumes of off-gas constituents are generated. ... Silver S (1994) Resistance to arsenic compounds in microorganisms. FEMS Microbiol Rev 15:355–367. Article CAS Google Scholar Challenger F (1945) Biological …

Arsenic (As) is classed as a semi-metal, or metalloid. In nature it is commonly found as a metal in low levels in most soils and in higher concentrations associated with some copper, lead and zinc ores. The most common arsenic mineral is arsenopyrite, a compound of iron, arsenic, and sulfur.

Arsenic (As) is a toxic trace element with many sources, including hydrocarbons such as oil, natural gas, oil sands, and oil- and gas-bearing shales. ... (silver nitrate or nitric acid) to take up the volatile species such as trimethylarsine (TMA) from natural gas prior to analysis. ... smelting, and coal combustion. Research on persistence …

Arsenic is a group V element, together with nitrogen, phosphorus, antimony and bismuth. Its electronic configuration is [Ar]3d 10 4s 2 4p 3; it has an atomic weight of 75 and commonly occurs naturally in two oxidation states, +5, +3, and, more rarely, in the 0 or –3 state.Arsenic is classified as a metalloid in that it has a chemical nature intermediate …

A lot of anthropogenic activities can discharge arsenic into the ecosystem such as industrial wastes, incineration of municipal, pesticide production and wood preserving. In addition, most arsenic soluble species can enter surface waters via runoff and leach into the groundwater. Around forty million people from all over the world are …

Investigation has been carried out for arsenic removal from a silver bearing copper ore. The copper ore was roasted in nitrogen atmosphere (> 99%) at temperatures ranging from 923.15 K to1123.15 K ...

Arsenic is a naturally occurring element commonly found as an impurity in metal ores, and is produced commercially for use in pesticides, wood preservatives, and metal alloys. Arsenic can be toxic in large doses, and the mining industry monitors and prevents its release into the environment. [32] Background.

Arsenic Removal from Arsenopyrite-Bearing Iron Ore and Arsenic Recovery from Dust Ash by Roasting Method. 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.….

Based on the thermodynamic analysis, the selective leaching of arsenic from copper smelting dust was carried out in the NaOH-Na 2 S system. In the alkali leaching system, more than 80% arsenic can be leached out from the dust with the diffusion-controlled type in the Avrami model, while the leaching rates of valuable metals are less …

Unlike gold, silver rarely occurs in a pure form in a sufficient quantity to be useful. Usually it has been procured by smelting other ores, of which it can be thought of as almost a by-product. In antiquity a common ore used to produce silver was galena, or lead sulfide, although it appears that lead carbonate (cerussite) was also used.

In addition, compounds containing arsenic, antimony, silver, lead and bismuth as well as gangue rich in calcium (the slag centre is Ca-rich; Fig. 9) were certainly present. Bronze prills could thus reflect co-smelting of copper and tin-bearing minerals, whereas metallic copper might originate from localised reduction of copper minerals.

Journal of hazardous materials. 2022. This study comprehensively investigated arsenic's enrichment, distribution, and characteristics in tailings. XRD and SEM-EDS …