MnFe2 O4 /ZHETISAY COMPOSITE AS A NOVEL MAGNETIC MATERIAL FOR ADSORPTION OF Ni(II)
Baimuratova Z.A. Kalmakhanova M.S. Shynazbekova S.S. Kybyraeva N.S. Diaz de Tuesta J.L. Gomes H.T.
2022National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#2022Issue 258 - 72 pp.
This paper deals with the preparation of magnetic adsorbents from natural clays for the adsorption of Ni(II) from aqueous matrices. The phase composition and structure parameters of natural clays and their modified forms, as well as their application as adsorbing agents for the purification of drinking water and their sources were studied. In the study, natural clays from the Zhetisay deposit of Kazakhstan were used to obtain magnetic composites by chemical coprecipitation and applied as effective adsorbents to remove Ni(II) from water. The formation of sorbents by magnetic nanoparticles is an urgent task of our time. This is due to the needs of various branches of science and technology in magnetically controlled sorbents. The advantage of such sorbents in comparison with natural sorbents is the ability to control them using a magnetic field. Sorbents with magnetic properties are used for contact cleaning of substances, which greatly simplifies the sorption process and the completeness of the sorbent processing. The use of such materials makes it possible to replace the mechanical separation stage, which is one of the labor-intensive stages of this process. Magnetic pillared clays were obtained by intercalation of iron and manganese cations in the region between the clay silicate layers, upon hydrolysis of a solution of Fe2 (SO4 )3·9H2 O and MnCl2·4H2 O with NaOH. The intercalated clay is then dried and calcined at 400°C for 3 h. The basic physical and chemical properties were stu died by XRD, elemental analysis, FTIR and atomic emission spectral analysis (AES). The obtained magnetic pillared clays (MnFe2 O4 /Zhetisay) showed better characteristics than natural clays. The results of adsorption revealed that the optimal adsorption conditions were observed at pH 6.
adsorption , heavy metal , intercalation , magnetic pillared clays , modification , water treatment
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M.KH. Dulati Taraz Regional University, Taraz, Department of Chemistry and Chemical Technology, Tole bi 61, Taraz, Kazakhstan
South Kazakhstan State Pedagogical University, Department of Сhemistry, Shymkent, Kazakhstan
Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Bragança, 5300-253, Portugal
M.KH. Dulati Taraz Regional University
South Kazakhstan State Pedagogical University
Centro de Investigação de Montanha (CIMO)
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