Magnetic Sorbent with a Mesoporous Shell for the Simultaneous Preconcentration of Ecotoxicants of Different Nature
- Авторы: Kiseleva M.1, Pryazhnikov D.1, Kubrakova I.1
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Учреждения:
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Выпуск: Том 73, № 1 (2018)
- Страницы: 10-17
- Раздел: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182944
- DOI: https://doi.org/10.1134/S1061934818010033
- ID: 182944
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Аннотация
A magnetic sorbent with a multilayer shell of the composition Fe3O4@TEOS@CTAB@TEOS + MPTEOS designed for the simultaneous or sequential preconcentration of components of various nature is obtained. The conditions of microwave synthesis and modification of a new magnetic sorption material are described; its composition and particle sizes are characterized. The sorption capacity of the sorbent is provided by creating a mesoporous silica layer filled with cetyltrimethylammonium bromide (CTAB) micelles and additionally modified with an S-containing polymer (MPTEOS) on the surface of the magnetic carrier. The properties of the obtained material with respect to the regulated substances from two groups of priority pollutants are studied: phenols of various structures and heavy metals. The main sorption characteristics (effect of pH, phase contact time, nature of eluent, V: m, salt background) are studied and the conditions for extracting ecotoxicants at their concentration in the solution at a level of μg/L are optimized. The data obtained under the conditions of separate and simultaneous extraction of analytes of different nature confirmed a possibility of the quantitative determination of various types of natural water pollutants at the levels significantly lower than the MPC using a single sorption material. In using HPLC methods and electrothermal atomic absorption spectrometry, a complete analysis of a single sample takes 40−50 min and of a series of samples, 2–3 h. Such characteristics, combined with the simplicity of material preparation make it promising for routine analytical studies.
Об авторах
M. Kiseleva
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: kubrakova@geokhi.ru
Россия, Moscow, 119991
D. Pryazhnikov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: kubrakova@geokhi.ru
Россия, Moscow, 119991
I. Kubrakova
Vernadsky Institute of Geochemistry and Analytical Chemistry
Автор, ответственный за переписку.
Email: kubrakova@geokhi.ru
Россия, Moscow, 119991
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