Transfer of chemical elements in vapor-gas streams at the dehydration of secondary sulfates

Бортникова, С Б; Yurkevich, Nataliya; Devyatova, Anna; Abrosimova, Natalya; Saeva, Olga; Cherny, Nikolay; Palchik, N. A.; Даниленко, И. В.; Shuvaeva, Olga V.; Troitskii, D. I.

doi:10.1051/e3sconf/20199805004

Cited by 2 publications

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“…The concentrations of elements in condensates from solids increased depending on the oxidation state of the tailings matter, and there is a direct correlation with the amount of water-soluble species of elements [34]. It was shown that secondary sulfates forming on tailings surfaces can be a significant source of chemical elements because of their volatilization and transport by vapor-gas flows [34][35][36]. The investigation of sulfates and hydrated sulfate minerals plays a key role in the interpretation of the hydrochemical history of anthropogenic toxic tailings (and rock dumps) [36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Volatility of Chemical Elements During the Dehydration of Secondary Sulfates

et al. 2022

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Link for citation: Bortnikova S.B., Abrosimova N.A., Devyatova A.Yu., Shevko E.P., Yurkevich N.V., Cherny N.K., Danilenko I.V., Palchik N.A. Volatility of chemical elements during the dehydration of secondary sulfates. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2022, vol. 333, no. 1, рр. 121-133. In Rus. The relevance. Air pollution due to the activities of the mining and metallurgical industries is a serious problem for the environment. This study was conducted to determine the possible mechanisms of migration and the sources of elements in the atmosphere above the surface of tailings. The main aim of the research is to show that chemical elements can be trapped by the water vapor and can migrate with the vapor phase during the desorption and dehydration of hydrous sulfates. Object: samples from the surface of the Belovo waste heaps (Belovo zinc processing plant, Belovo, Russia). Methods. Powder X-ray diffractometry (XRD) was used to determine the phase compositions of the crystalline substances, their quantitative phase relationships and transformations. An Agilent 8800 ICP-MS instrument (Tokyo, Japan), equipped with a MicroMist nebulizer, was used to determine the elements in the water samples (pore solution and condensates). Also, we used binocular microscope and physicochemical modeling methods. Results. By analyzing the condensates, it was determined that a wide range of chemical elements can migrate with vapor-gas streams from secondary hydrous sulfates under relatively low-temperature conditions (60 °C). Condensate from the wet sample contains high element concentrations due to the input of elements from the pore solution and hydrous sulfates. Alterations in mineral structure and water release are indicated by losses of sample weight. With dehydration, cations and trace elements can be extracted from the crystal lattice, replaced by protons, and can then enter the vapor-gas phase when the solution evaporates.

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Section: Introductionmentioning

confidence: 99%

Volatility of Chemical Elements During the Dehydration of Secondary Sulfates

et al. 2022

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Formation dynamics of phase and elemental composition of the oxalate-calcium nephrolithes

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Сергеевич²,

Troitskij

et al. 2021

Urology reports (St. - Petersburg)

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BACKGROUND: Fundamental investigation of the issue how various factors influence on origin and behavior of the nephrolithiasis is very actual because of necessity of the information about of early diagnostic methods as well as a prognostication. So, the information about of formation dynamics of phase and elemental composition of oxalate-calcic nephrolithes pending of lifetime of one patient is useful. AIM: The aim of the investigation is to obtain the information about of elemental composition as well as phase composition of the one patient nephrolithes formed pending of lifetime. MATERIALS AND METHODS: In the paper the data of the careful investigation of the elemental and phase composition of the two nephrolithes ablated from one patient at different times are presented. First nephrolith had been ablated from the right kidney in the March of 2002 (patient was 41 years old), subsequently second that had been did from the left kidney in the December of 2019 (patient was 58 years old; the nephrolith was found in 2012). The study was carried out using mass spectrometry and atomic adsorption spectrometry with inductively coupled plasma, infrared spectroscopy, X-ray phase analysis, CHN/S analysis. RESULTS: Both calculi were calcium oxalate, predominantly Vevellite structures. The chemical composition of the both nephrolithes is alike. They contain microimpurities of all essential as well as conditionally essential elements. Quantities of the toxic elements in the nephrolithes are identical too. Microquantities of the nitrogen and sulphur indicate a presence of amino acids and proteins in the nephrolithes structure. CONCLUSIONS: The results indicate that the nephrolithes with invariable phase and elemental composition would be forming in the different kidneys of one patient pending of lifetime.

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Transfer of chemical elements in vapor-gas streams at the dehydration of secondary sulfates

Cited by 2 publications

References 10 publications

Volatility of Chemical Elements During the Dehydration of Secondary Sulfates

Volatility of Chemical Elements During the Dehydration of Secondary Sulfates

Formation dynamics of phase and elemental composition of the oxalate-calcium nephrolithes

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