@article{Baranchiyeva_Seilkhanova_Rakhym_Mastai_Ussipbekova_2021, title={Adsorption of Pb(II) and Cd(II) from aqueous solutions on polyvinylpyrrolidone modified Kyzylsok natural clay}, volume={14}, url={https://ijbch.kaznu.kz/index.php/kaznu/article/view/506}, DOI={10.26577/ijbch.2021.v14.i1.018}, abstractNote={<p>The present work considers the production of a cheap and effective sorbent based on natural clay from the Kyzylsok deposit (Almaty region) in order to purify wastewater from heavy metal ions (Cd<sup>2+</sup>, Pb<sup>2+</sup>). It was found that the starting material is applicable for the extraction of Cd<sup>2+</sup> ions (the degree of extraction is (97.00 ± 1.99) %), while for the extraction of Pb<sup>2+</sup> ions the initial clay must be modified. The modification was carried out using polyvinylpyrrolidone (PVP). The degree of extraction of Pb<sup>2+</sup> ions with modified clay increased from (70.00 ± 1.77)% to (98 ± 1.13)% The influence of PVP concentration in the composite material (modified clay) on its sorption properties was studied: the optimal concentration of PVP was 0.1 % solution. The desorption of metal ions was also investigated in the work, it does not exceed 2%. It was found that the sorption process is described by the monomolecular Langmuir isotherm model and the kinetic model of the pseudo-second order.</p>}, number={1}, journal={International Journal of Biology and Chemistry}, author={Baranchiyeva, Zarina and Seilkhanova, Gulziya and Rakhym, Akmaral and Mastai, Yitzhak and Ussipbekova, Yenlik}, year={2021}, month={Jul.}, pages={164–171} }