Adsorption of Pb(II) and Cd(II) from aqueous solutions on polyvinylpyrrolidone modified Kyzylsok natural clay




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 (Cd2+, Pb2+). It was found that the starting material is applicable for the extraction of Cd2+ ions (the degree of extraction is (97.00 ± 1.99) %), while for the extraction of Pb2+ ions the initial clay must be modified. The modification was carried out using polyvinylpyrrolidone (PVP). The degree of extraction of Pb2+ 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.


How to Cite

Baranchiyeva, Zarina, Gulziya Seilkhanova, Akmaral Rakhym, Yitzhak Mastai, and Yenlik Ussipbekova. 2021. “Adsorption of Pb(II) and Cd(II) from Aqueous Solutions on Polyvinylpyrrolidone Modified Kyzylsok Natural Clay”. International Journal of Biology and Chemistry 14 (1):164-71.