Results 151 to 160 of about 1,187 (190)
Multivariate image analysis of realgar–orpiment flotation froths
Mineral Processing and Extractive Metallurgy, 2017 ABSTRACTMultivariate image analysis was used to estimate the arsenic concentrations in froths resulting from the flotation of different mixtures of realgar and orpiment particles in a laboratory batch flotation cell. The realgar floated rapidly and in excess of 90% of the mineral could be recovered after 2 minutes, whereas only 48–75% of the orpiment ...
Aldrich, Chris +4 more
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Studies on Orpiment (As2S3) Quantum Dots and their Self-Assemblies
Australian Journal of Chemistry, 2017 The natural mineral orpiment (As2S3) has long been used in traditional medicines for various diseases, although it is poorly soluble and has resulting low bioavailability. In this study, orpiment quantum dots (QDs) belonging to rare V–VI binary QDs were first synthesised through top-down and bottom-up routes, in which a mixture of ethanolamine and ...
Jinzhu Wu +3 more
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Structure comparison of Orpiment and Realgar by Raman spectroscopy
Spectroscopy Letters, 2017Raman spectroscopy was used to characterize and differentiate the two minerals, Orpiment and Realgar, and the bands related to the mineral structure.
Hongfei Cheng, Yi Zhou
exaly +3 more sources
Massive Human Ingestion of Orpiment (Arsenic Trisulfide)
Journal of Emergency Medicine, 2013Because the toxicity of arsenic is well known, arsenic-containing compounds have frequently been ingested for suicidal purposes. We report a case of attempted suicide by massive ingestion of arsenic trisulfide, an arsenic mineral of low solubility, which resulted in minimal symptoms.An asymptomatic 57-year-old man presented to an Emergency Department ...
Jennie A Buchanan +2 more
exaly +3 more sources
Electrochemical study of orpiment (As2S3) dissolution in a NaOH solution
Hydrometallurgy, 2011Abstract The chemical dissolution mechanism of natural orpiment polycrystals in a 1 M NaOH solution has been investigated using a combination of spectroscopic, chromatographic and electrochemical methods. Two different types of electrodes were used for characterization of dissolution process by open-circuit potential (OCP) measurements, linear sweep (
Ahmad Khodadadi Darban +2 more
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Pressure oxidation kinetics of orpiment (As2S3) in sulfuric acid
Hydrometallurgy, 2007Abstract Pressure oxidation kinetics of a massive orpiment (As 2 S 3 ) sample in sulfuric acid solution were systematically investigated. The effects of temperature (170 to 230 °C), mean particle size (48 to 125 μm diameter) and oxygen partial pressure (345 to 1035 kPa) were evaluated.
David G Dixon
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Chemosphere, 2022 Arsenic in acid mine drainage (AMD) is commonly associated with the bioleaching of arsenic sulfide minerals. Orpiment is iron free and one of the most common arsenic sulfide minerals, but no studies are involved with the relationship between the iron ...
Guangji Zhang, Chao Yang
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Oxidative dissolution of orpiment and realgar induced by dissolved and solid Mn(III) species
Geochimica Et Cosmochimica Acta, 2022 A thorough understanding of the complex redox coupling among manganese, arsenic, sulfur and oxygen in subsurface environments is still obscured by their metastable intermediate valances and speciation. Arsenic sulfide minerals may be disturbed by natural
Xingxing Wang +2 more
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Chemical Geology, 2022 Samples of active chimneys, chimney flanges and massive sulfides from the Daiyon-Yonaguni Knoll hydrothermal field are composed of major barite and minor stibnite and orpiment.
M Ivarsson
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