Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.17516/1998-2836-0256

Ключевые слова: arsenic, separation of chemical species, silica gel, adsorption preconcentration

Аннотация: A method for the adsorption separation of inorganic arsenic species (As(III)/As(V)) using sequentially connected preconcentrating columns filled with functionalized silica gels and their determination by inductively coupled plasma optical emission spectrometry was proposed. As(V) was effectively retained at pH 3.5-6.5 by an adsorbent containing groups of quaternary phosphonium bases on the surface and exhibiting the properties of an anion exchanger. In this pH range. As(III) was not extracted, which made it possible to separate As(V) from As(III). As(III) was retained in a wide pH range of 1-6 by a complexing adsorbent containing mercapto groups on the surface. Adsorbed As(V) was quantitatively eluted from the surface with 1M HNO3, and As(III) - with 5 % unithiol solution in 2M HCl. The use of non-aggressive eluents allows us to reuse adsorbents for preconcentration of As(III) and As(V) at least 5 times. The separation efficiency was confirmed by the analysis of model solutions. A method for the adsorption separation of inorganic arsenic species (As(III)/As(V)) using sequentially connected preconcentrating columns filled with functionalized silica gels and their determination by inductively coupled plasma optical emission spectrometry was proposed. As(V) was effectively retained at pH 3.5-6.5 by an adsorbent containing groups of quaternary phosphonium bases on the surface and exhibiting the properties of an anion exchanger. In this pH range, As(III) was not extracted, which made it possible to separate As(V) from As(III). As(III) was retained in a wide pH range of 1-6 by a complexing adsorbent containing mercapto groups on the surface. Adsorbed As(V) was quantitatively eluted from the surface with 1M HNO3, and As(III) - with 5 % unithiol solution in 2M HCl. The use of «non-aggressive» eluents allows us to reuse adsorbents for preconcentration of As(III) and As(V) at least 5 times. The separation efficiency was confirmed by the analysis of model solutions. © Siberian Federal University. All rights reserved

Журнал: JOURNAL OF SIBERIAN FEDERAL UNIVERSITY-CHEMISTRY

Выпуск журнала: Vol. 14, Is. 4

Номера страниц: 477-488

Место издания: SIBERIAN FEDERAL UNIV

Издатель: 0

• Borodina Elena (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Krasnoyarsk, Russia)
• Didukh-Shadrina Svetlana L. (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Krasnoyarsk, Russia)
• Losev Vladimir N. (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Krasnoyarsk, Russia)
• Trofimchuk Anatoly K. (Taras Shevchenko Natl Univ Kyiv, Dept Inorgan Chem, Kiev, Ukraine)

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