Purification of aqueous solutions from radionuclide contamination is an extremely problematic topic, which is the subject of many scientific papers. This scientific topic is very relevant to Ukraine. In particular, the synthetic adsorbents � activated carbon, zeolites, metal oxide-adsorbents TiO2, titanium or zirconium phosphates, ion exchange resins, etc., are often used for the removal of heavy metal cations Pb (II), Cd (II), Ba (II), Hg (II), Sr (II) as well as some anions Cl-, F- from the aquatic environment. A special place among adsorbents is occupied by ion exchange resins, which, as a rule, have an organic matrix, for example, styrene-vinylbenzene with functional groups fixed on it. Ion-exchange resins, along with titanium dioxide and activated carbon, are most widely used in industry to purify aqueous solutions from heavy metal cation and radionuclides. These numbered adsorbents are synthetic materials. However, some adsorbents were created by nature. Natural zeolite, deposits of which are in the Zakarpattya region of Ukraine, are among them. The use of natural zeolites of Transcarpathia can solve some environmental problems caused by 90Sr pollution in the aquatic environment. All chemical processes including adsorption occur in complicated mechanisms and are reversible. After some time, equilibrium has been introduced. These complex mechanisms can be divided into several simple stages, which can be described by a relatively simple mathematical equation. In this study, the adsorption of Sr2+ ions from aqueous solutions by natural zeolite was investigated. And four most common kinetic models were applied for analysis of the experimental adsorption data.
The aim of the present work is titanium silicate influence on the zinc and strontium migration in the aquatic environment. The adsorption capacity of titanium silicate toward zinc and strontium ions was investigated. With the aid of a fluorescent X-ray analyzer and energy dispersive spectroscopy the composition of the sorbent formed was determined as well as zinc and strontium presence on the surface of the sorbent after the sorption process. It was shown, that adsorption of zinc and strontium by titanium silicate strongly depends on time of interaction and solution acidity and increases with increasing of both parameters. It was established, that for the initial concentration of zinc and strontium at the level of 0.005M the presence of ions that cause the natural mineralization of water does not affect their adsorption extraction.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.