Peer-reviewed articles 17,970 +


Barbora Dousova; Miloslav Lhotka; Eva Bedrnova
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Arsenic (As) and antimony (Sb) are elements with similar chemistry and geochemistry, but their environmental risk differ depending on the origin and degree of the pollution. As and Sb are both very toxic, particularly their inorganic substances in the oxidation states of III and V, which also represent the most common As/Sb forms in the environment. In environmental systems, As mostly occurs as the tetrahedrally coordinated, pentavalent arsenate AsO43- (in oxidising environment), and the trivalent arsenite AsO33- (under weakly reducing to reducing conditions), while Sb is entirely found as the octahedrally coordinated, pentavalent antimonate Sb(OH)6-, over a wide redox potential range. Several low-grade materials (zeolite, biochar) and building waste (concrete slurry waste) in original and surface modified forms were tested as selective adsorbents of As and Sb oxyanions from contaminated waters. The adsorption stability of oxyanions was verified by the Langmuir adsorption model. In natural systems As oxyanions demonstrated the preferential affinity for iron (Fe) oxides/hydroxides, while Sb oxyanions were more selectively binded to organic matter (OM). The adsorption of tested oxyanions on Fe/Mn modified sorbents ran with a higher efficiency (?95%) compare to original materials, with a decreasing trend: As(V) ? Sb(V).
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This research was funded by Czech Science Foundation under the project 19-04682S.
Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 06-08 December, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
06-08 December, 2022
low-grade material, building waste, adsorption, arsenic, antimony