Nikitina Natalya V. RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia nikitina.natali0208@mail.ru Author's articles Sorbents Based on Natural Bentonites, Modified by Polyhydroxocationes Zirconium(IV), Aluminum and Iron(III) by the «Coprecipitation» Method Adsorption of organic reagents by natural bentonites modified with aluminum and iron (III) polyhydroxocations