Determination of Inorganic Thallium Compounds in the Particulate Matter of Emissions and Workplace Air by Sequential Dissolution

Abstract

Inorganic thallium compounds in the atmospheric particulate matter of emissions and in the workplace air of specific industrial production can be determined through selective sequential extractions: Tl(I) is separated from Tl(0) and Tl(III) in the first step, Tl(0) in the second one, while in the final extraction both Tl(III) soluble and insoluble compounds are determined. The procedure has been tested on 1633a Coal Fly Ash standard reference material. The thallium recovery was in the range 91 -98%.

Thallium and co-genetic trace elements in hydrothermal Fe-Mn deposits of Central Spain

“…The high toxicity of Tl and its possible presence in metal sulfides, coals and carbonaceous sediments have prompted studies on the biogeochemical cycling and bioavailability of Tl in mining wastes, smelting ashes, wastewaters, surface waters, soils, etc. (Lopez Antón et al, 2013;Ospina-Alvarez et al, 2015 and2014;Lopez-Arce et al, 2017;Sturini et al, 2009;Xiong, 2009;Xiao et al, 2003;Voegelin et al, 2015Grösslová et al, 2018;Vanĕk et al, 2018) describing different pollution sources, dispersion mechanisms and pathways as well as final speciation and secondary mineralization. For instance, a severe Tl pollution of drinkable water from the public distribution system in Tuscany region (Italy) (Biogiani et al, 2017) and the resulting health impact for the local inhabitants have recently been described (D'Orazio et al, 2020).…”

Epithermal Origin and Environmental Evolution of Iron-Hosted Thallium and Kerogen Deposits: The Lodares Area Case (Soria, Spain)

“…The high toxicity of Tl and its presence in coals and carbonaceous sediments had prompted studies on its bioavailability and geochemical cycling in smelting ashes, soils, coals, etc. [8][9][10][11][12][13][14]. The Lodares (Soria, Spain) area deposits and other similar carbonate rock-hosted epithermal deposits could be interesting polymetallic sources, e.g., the Jas Roux deposit (France) with Tl phases hosted in Triassic calcareous rocks [15], the Alshar Au-As-Sb-Tl deposit (Macedonia) developed as a mineralized breccia at the contact of volcanic rocks with dolomites, jasperoid beds in the carbonate rocks, and vein-disseminated zones in dolomites and Tertiary volcanic rocks [16], or the case of Agdarreh (Iran) [17] which includes: (1) pre-ore decalcification with dolomite dissolution re-precipitation, (2) a first-stage silicification process associated with pyrite, (3) a second-stage silicification linked with precipitation of galena and, Hg-Tl-Sb-As sulfides, (4) late-stages of cinnabar and baryte in pockets; (5) oxide ore stage and carbonate alteration, e.g., complex Mn-Fe-rich oxy-hydroxides, arsenates, sulfates in residual leached rock and infill of karstic cavities.…”