Thallium Isotopes and Their Application to Problems in …
This process leads to an enrichment of Tl in the volcanic section of oceanic crust (on average the uppermost 500–600 m) that has been shown to be affected by low temperature (low-T) alteration. ... Ihlenfeld C et al (2010a) Thallium isotope variations in an ore-bearing continental igneous setting: Collahuasi Formation, Northern Chile. Geochim ...
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Applied Sciences | Free Full-Text | Thallium Use, Toxicity, and …
Thallium (Tl) is released into the environment, where is present at very low levels, from both natural and anthropogenic sources. Tl is considered as one of the most toxic heavy metals; it is a non-essential metal, present in low concentrations in humans. Tl toxicity causes dermatological and gastrointestinal diseases and disorders of the nervous system, and …
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Secondary Sulfate Minerals from Thallium Mineralized …
A study of ore compositions and thallium occurrence in a mercury-thallium deposit at Lanmuchang in Xingren County in southwestern Guizhou. Guizhou Geol. 1996, 13, 24–37.
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Thallium isotopes in metallurgical wastes/contaminated
The discharge of Tl-containing wastewaters from mining, smelting, ore processing, cement production and coal-fired power generation has become the main source for abnormally raised concentration ...
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Thallium in Drinking Water | Contaminant Source | Water …
Depending on the exposure route there may be elevated levels of thallium in blood, hair, or urine. You live near a hazardous waste site or region with a historic use of thallium in manufacturing, such as in: iron and steel manufacturing, mining, refining, fossil fuel combustion, semiconductor production, and ore processing.
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Solid-phase distribution and mobility of thallium in mining
In this work, sample M28 is a good example of this phenomenon as the fly ash from the Zn–Pb ore roasting process is strongly enriched in Tl (49.6 mg kg −1, Table 1) compared to the crude ore (0.13 mg kg −1) (M25, Table 1). Thallium partitioning between the slag, fly ash, and flue gas mainly depends on its mode of occurrence in the raw and ...
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Thallium
Anthropogenic sources of thallium include gaseous emissions from cement industries, copper smelting, petroleum refining, coal-based power plants, and metal sewers and from ore processing operations. 108 Thallium intoxication can result from skin contact, since thallium salts are easily absorbed through the skin. 109 Exposure via inhalation may ...
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Agromining of Thallium and Noble Metals | SpringerLink
Thallium is a co-contaminant in some mining ores and slags, as well as a product of coal combustion (Bunzl et al. 2001). Lis et al. reported that Zn-Pb ore mining and processing increased soil Tl concentrations by up to two orders of magnitude, with concentrations reaching 35 mg kg −1 in affected areas.
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Presence of thallium in the environment: sources of …
The highest thallium content was found in ore-bearing formations of limestone from the middle Trias, which ranged from 0.45 to 4.66 mg kg −1 for the ... The presence of contaminants comprising thallium in air results in its absorption by plants—a process, which is further enhanced by high thallium content in soil (Groesslova et al ...
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Special Issue "Thallium: Mineralogy, Geochemistry …
This Special Issue welcomes contributions on thallium mineralogy, geochemistry, and ore geology, helping to describe the intriguing crystal-chemistry of …
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Thallium: a review of public health and environmental …
Since the 1920s, thallium became widely used in industry. During mining, ore processing and product application, numerous cases of industrial thallium poisoning occurred (Schoer, 1984). Exposure to high levels of …
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(PDF) Thallium Toxicity in Humans
thallium from ore processing operations is the major . source of elevated thallium concentrations in water. Major industrial sources of elevated thallium include .
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Re-emergence of Thallium as a Heavy Metal Contaminant …
The primary source of elevated thallium concentrations in water is the leaching of thallium from ore-processing operations. Approximately 60–70% of thallium production is utilized in the electronics industry in superconducting materials, and the remainder in the pharmaceutical industry and optics manufacturing.
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Pinaacle 900H Thallium in Water
thallium is widespread, mostly in specialized electronic equipment and as an additive in glass to increase its refractive index and density, a catalyst or intermediate in the synthesis of organic compounds, and a component in high-density liquids for sink-float separation of minerals. Leaching from ore processing operations is the
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(PDF) Evaluation of thallium isotopic fractionation during the
We also present the first evaluation of Tl isotopic ratios over a cycle of sulfide processing, from the ore flotation to pyro- and hydrometallurgical stages. ... Thallium/element concentrations ...
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Thallium
thallium deposits with a sufficiently high ore concentration to warrant mining op erations have not been found. On the other hand, thallium occurs in relatively high concentrations some sulfidic deposits. During the processing of such ores it is enriched on dust particles due to the volatility of most thallium compounds.
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Translocation and mobility of thallium from zinc–lead ores
Thallium is a toxic, non-essential element. Zinc–lead ores are a known source of thallium pollution. The aim of this paper was to investigate the translocation of thallium from zinc–lead ores from the Cracow–Silesia Upland due to ore flotation processing and natural processes and the element's mobility in these samples as determined by …
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Understanding stable Tl isotopes in industrial processes and …
Thallium isotopic compositions can be affected during industrial processes. ... In Zn ore processing, Tl must be eliminated from the Zn circuit. The use of the jarosite process has become widely used to eliminate Tl in Zn circuits, as jarosite is a scavenger for Tl (Dutrizac, 1997).
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The mobility of thallium from bottom soil of the Silesian …
Thallium is a nonessential toxic element that may pose an environmental hazard. A crucial factor for the toxic effect of Tl is the mobility of the element. ... The top soil in this area is 1.3–3 times richer in Tl than the bottom soil, due to Zn-Pb ore processing (Lis et al., 2003). Therefore only the bottom soil (0.8–1.0 ...
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Thallium isotopes in metallurgical wastes/contaminated soils…
Thallium (Tl) concentration and isotope data have been recorded for contaminated soils and a set of industrial wastes that were produced within different stages of Zn ore mining and metallurgical processing of Zn-rich materials. ... -jarosite, which can form in ore processing wastes [34].
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Mineral Resource of the Month: Thallium
The leading sources of thallium released into the environment are coal-burning power plants and smelters of copper, lead and zinc ores. The major sources of …
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15 Thallium Uses: Facts You Should Know!
Thallium is a chemical element with the symbol Tl and atomic number 81. It is a soft, bluish-gray metal that belongs to the group of elements known as the ... It is primarily obtained as a byproduct of lead, zinc, and copper ore processing. Thallium has a low melting point and is highly malleable, making it easy to shape into various forms.
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US7645372B2
The amount of thallium precipitated was doubled even though the amount entering the process stage remained the same. The final thallium content fell to a level of 0.5-0.9 mg/l, which corresponds to a content of about 3 g/t in pure zinc i.e. 3 ppm. The thallium content in pure zinc is thus low enough for commercial purposes.
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Abundance and fate of thallium and its stable isotopes in …
The raw material and four processing wastes revealed the following ε 205 Tl values: pyrite ore + 1.28, electrostatic precipitation fly ash − 1.10, cyclone fly ash + 2.17, boiler fly ash + 8.34 and fluidized-bed furnace slag + 16.24. These large variations in Tl isotope composition may be brought about by both Rayleigh fractionation and ...
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Potential Technologies for Removing Thallium from …
All of the following thallium bearing water sources have been included in the literature survey: groundwater pumped to conduct mining operations, waters emitted from abandoned mines, process waters used in mining and mineral processing operations (including milling, * Corresponding author. E-mail: [email protected]
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Stable isotope fractionation of thallium as novel evidence …
The chalcophile feature of Tl is causative of pollution arising from sulfide ore processing. At temperatures higher than 600 °C, Tl 2 SO 4 can be converted into Tl 2 O and/or Tl 2 O 3. The latter can be evaporated into combustion gas during the pyrolytic process of smelting and can be decomposed owing to its limited thermal stability (Vaněk ...
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Thallium Statistics and Information | U.S. Geological Survey
Thallium also is recovered as a byproduct from the flue dust and residues generated during the roasting and smelting steps in the processing of these ores. Thallium metal and its compounds are consumed in a wide variety of applications; for example, thallium is used in semiconductor material for selenium rectifiers, in gamma radiation detection ...
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Consumer Factsheet on: THALLIU
What is Thallium and how is it used? Thallium is a metal found in natural deposits as ores containing other elements. The greatest use of ... coal burning power plants, and metal sewers. The leaching of thallium from ore processing operations is the major source of elevated thallium concentrations in water. Thallium is a trace metal associated ...
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Thallium
During the processing of such ores it is enriched on dust particles due to the volatility of most thallium compounds. Almost all used in world today is produced from such dusts. …
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Toxicity and pollution potential of thallium
Toxicity and pollution potential of thallium are reviewed. Thallium is slightly more acutely toxic to mammals than mercury, and as acutely toxic as copper to fish. Its present industrial uses are too limited to generate pollution, but thallium, discharged in wastes from mines, ore-processing, and coal-burning plants, is contaminating the ...
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