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T. I. Tikhomirova, N. M. Sorokina, O. O. Lashtabega, D. N. Konshina, V. V. Konshin, Z. A. Temerdashev, G. I. Tsysin

Preconcentration of element anions on the filters with bound quaternary amino groups

Abstract

Sorption of molybdosilicic and molybdovanadophosporic heteropolyacids (HPA), as well as anion forms of arsenic(V), vanadium (V) and chromium(VI) on cellulose filters with bound quaternary amino groups was studied. It was found that HPA are quantitatively sorbed on filters from solutions with high ion strength and high concentration of mineral acids. It was shown that AsO43–,CrO42–, VO3are sorbed at pH 3 – 9. Solution ion strength significantly influences anions recovery. Conditions for preconcentration of vanadium, arsenic and chromium from 250 ml of aqueous solutions (preconcentration coefficient was 5´103) were found. A technique for sorption-XRF determination of these elements in ultrapure waters was proposed.
Moscow University Chemistry Bulletin.
2008, Vol. 49, No. 6, P. 403
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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