ADSORPTION OF ARSENIC, CHROMIUM, LEAD, CADMIUM BY ADSORBENTS ON THE BASIS OF Zr(IV), Ti(IV), Sn(IV), Al(III), Fe(III) OXIDES

Authors

  • Ye. O. Kolomiets Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine, Kiev-142, Ukraine
  • E. О. Kudelko Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine, Kiev-142, Ukraine
  • T. V. Maltseva Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine, Kiev-142, Ukraine
  • S. L. Vasilyuk Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine, Kiev-142, Ukraine
  • Yu. S. Dzyazko Vernadsky Institute of General and Inorganic Chemistry of National Academy of Sciences of Ukraine, Kiev-142, Ukraine

DOI:

https://doi.org/10.20535/2218-93002212018144235

Keywords:

adsorption, distribution coefficient, organic-inorganic oxide, multivalent metal

Abstract

It was studied sorption of As (V), Cr (VI), Cu (II), Cd (II), Pb (II) ions by inorganic and organic-inorganic ionites based on hydrated oxides of Zr (IV), Ti (IV), Sn ( IV), Al (III), Fe (III) from isotherms of sorption and  values of the distribution coefficients are calculated. High selectivity of oxides was observed in the presence of singly charged competing ions. It was found that in the case of the use of Zr (IV), Ti (IV), Sn (IV) oxyhydrates as a hybrid ionite in the composition, regeneration of 0.1 M with NaOH results in a 70-80% reduction in the absorptivity. The use of Fe (III) oxide as adsorbent leads to formation of intraspheric complexes. In this case, regeneration of ion-exchange adsorbents is difficult and requires higher concentrations of regenerating reagents and/or energy inputs.

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Published

2018-10-01

Issue

Vol. 22 No. 1 (2018)

Section

Статті

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Copyright (c) 2020 Ye. O. Kolomiets, E. О. Kudelko, T. V. Maltseva, S. L. Vasilyuk, Yu. S. Dzyazko

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