A new method for highly efficient separation and determination of arsenic species in natural water using silica modified with polyamines.

Autor: Losev VN; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation., Didukh-Shadrina SL; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation. Electronic address: semdid@mail.ru., Orobyeva AS; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation., Metelitsa SI; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation., Borodina EV; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation., Ondar UV; Tuvan State University, Kyzyl, Tuva Republic, 667000, Russian Federation., Nesterenko PN; Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, 119991, Russian Federation., Maznyak NV; Scientific Research Engineering Centre Kristall, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2021 Sep 15; Vol. 1178, pp. 338824. Date of Electronic Publication: 2021 Jul 02.
DOI: 10.1016/j.aca.2021.338824
Abstrakt: A simple and highly efficient method for the determination of highly toxic arsenic species using non-covalently aminated silica is proposed. The polyamines including poly(hexamethyleneguanidine), poly(4,9-dioxadodecane-1,12-guanidine), hexadimethrine, and poly(diallyldimethylammonium) were tested as silica modifiers. The prepared adsorbents allow effective preconcentration of anionic species of arsenic from aqueous solutions. It was found that As(V) can be quantitatively extracted from solutions at pH 4.5-7.0 by the anion exchange mechanism in less than 5 min, while neutral at this pH As(III) was not adsorbed at these conditions. A reaction with 2,3-dimercapto-1-propanesulphonic acid, which resulted in the formation of the negatively charged complex of As(III) with adsorbents was used for its quantitative extraction from solutions with a pH of 3.5-6.5. A system of two cartridges filled with poly(diallyldimethylammonium) modified silica and the on-line reaction of As(III) with 2,3-dimercapto-1-propanesulphonic acid proceeding between the cartridges was used for separate preconcentration and determination of As(V) and As(III) at pH 5. The proposed method was used for four-year monitoring of natural water pollution by arsenic in the area of residence of the indigenous peoples of Tyva Republic (Russia).
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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