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M. A. Chukaeva, V. G. Povarov, I. P. Sverchkov
The use of iron-containing waste metal as a
chemosorbent for cleaning sewage from molybdene ions
Abstract
In this paper,
the extraction mechanism of Mo(VI) from model solutions with the
iron-containing waste metal has been studied. The experimental data of X-ray phase analysis and
energy-dispersive microanalysis showed that iron(III) molybdate is formed at
the first stages of chemisorption, followed by the formation of layers enriched
in molybdenum oxide(VI). Chemisorption kinetics for Mo(VI) ions from model
solutions with the iron-containing waste metal was investigated. It was shown,
that the total exchange capacity of modified steel chips with a specific
surface more than 15 cm2/g towards Mo(VI) ions will be limited only by the
corrosion rate of steel chips, and theoretically will be achieved after its
complete dissolution. The efficiency of the chemisorption process has been
determined. So the possibility of using the iron-containing waste metal as a
chemosorbent for sewage treatment from Mo(VI) ions to the reference value was
shown.
Key words: chemisorption,
Mo (VI) ions, waste metal, process kinetics, sewage treatment.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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