THE SYNTHESIS OF Fe-AC NANOCOMPOSITE FOR ADSORPTION OF VANADIUM FROM ALUMINATE SOLUTION Arzu Osmanova Institute of Catalysis and Inorganic Chemistry. M. Nagiyeva, Azerbaijan National Academy of Sciences Baku, Azerbaijan E-mail: arzuosmanova235@gmail.com Supervisor: professor, DSci. Chem. Arif Haydarov Key words: vanadium, nanocomposite based on iron oxide, activated carbon
Alunite ore is a local raw material and is mainly used in the production
of aluminum [1]. During its complex processing, vanadium and gallium, useful
microelements, pass into the solution together with aluminum. Vanadium is of
special importance in recent years, as it is widely used in steel production, in
the manufacture of batteries [2].
The amount of vanadium transferred to the recirculated solution during
the treatment of alunite by Bayer method reaches 0.6-3 g/l. Adsorption of
vanadium from such solutions was carried out with Fe-AC nanocomposite.
To synthesize Fe – AC, 10 g of the CAC sample was mixed with 200 mL of
0.6 M FeSO
4
∙7H
2
O solution inside a sealed glass container. The sample was
placed in an agitating incubator at 55C for 24 h. Finally, the mixture was
altered with filter paper and the Fe – AC sample was rinsed with ultrapure
water until all soluble iron and iron particles that were not anchored to the
surface of CAC were removed. To ensure this, the iron of washing water was
analyzed using an atomic absorption spectrophotometer (AAS). The sample
was dried in an air oven at 60
0
C for 24 h and the dried samples of adsorbents
(CAC and Fe – AC) were kept in a desiccator, 18,19 A preparing Fe – AC,
the iron leaching tests were conducted to investigate the stability of iron
nanoparticles on CAC surface. Doing this, 0.05 g of the Fe – AC was agitated
with 25 mL of HCl solution at different pH (2, 4, 5, 6) at 25 C.
