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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–, VO3– are 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.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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