Тип публикации: статья из журнала
Год издания: 2015
Идентификатор DOI: 10.1016/j.microc.2015.05.022
Ключевые слова: Sorption, Silica, Arsenazo I, Polyhexamethylene guanidine, Preconcentration of metals, River water
Аннотация: Silica based sorbent sequentially modified with polyhexamethylene guanidine and 2-(1,8-dihydroxy-3,6-disulfo-2-naphthylazo)benzenearsonic add (Arsenazo I) was developed and studied in the present work. Conditions for immobilizing Arsenazo I on the aminated silica surface were studied: optimal equilibration time was 10 min, and a maximum reagent extraction was achieved between pHs 4 and 7. The stability of the sorbent in highly saline and weakly acidic solutions was examined: it was found that the reagent had not been desorbed from the surface by treatment with dilute solutions of HNO3 and NaCl solutions up to a concentration of 10 g/L. Maximum recovery of Al(III), Ca(II), Cd(II), Co(II), Cu(II), Fe(II), Fe(III), Mg(II), Ni(II), Pb(II), and St(II) was observed in the pH range of 5-7. Metals were desorbed from the surface with 1 M HNO3. Sorptioninductively coupled plasma optical emission method for the determination of metal ions had been developed, including group sorption preconcentration of metal ions from aqueous solutions at pH 7 in the hydrocarbonate buffer medium, their desorption with 1 M HNO3, and inductively coupled plasma optical emission determination. The proposed method was used to determine metal concentration in river waters of Krasnoyarsk Krai. (C) 2015 Elsevier B.V. All rights reserved.
Журнал: MICROCHEMICAL JOURNAL
Выпуск журнала: Vol. 123
Номера страниц: 84-89
ISSN журнала: 0026265X
Место издания: AMSTERDAM
Издатель: ELSEVIER SCIENCE BV
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