• 文献标题:   Composites based on zirconium dioxide and zirconium hydrophosphate containing graphene-like additions for removal of U(VI) compounds from water
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   PERLOVA OV, DZYAZKO YS, PALCHIK AV, IVANOVA IS, PERLOVA NO, DANILOV MO, RUSETSKII IA, KOLBASOV GY, DZYAZKO AG
  • 作者关键词:   uranium, zirconium phosphate, zirconium oxide, graphene oxide, composite, sorption
  • 出版物名称:   APPLIED NANOSCIENCE
  • ISSN:   2190-5509 EI 2190-5517
  • 通讯作者地址:   Odesa II Mechnikov Natl Univ
  • 被引频次:   0
  • DOI:   10.1007/s13204-020-01313-1 EA MAR 2020
  • 出版年:   2020

▎ 摘  要

The composites based on hydrated zirconium dioxide and zirconium hydrophosphate have been obtained. The materials contained 0.5-7% of graphene-like additions, which were obtained by chemical treatment of multiwalled carbon nanotubes (8-15 layers). The composites as well as their constituents were investigated with the XRD, FTIR, TEM, and porometric methods. When the content of carbon material is 2%, large granules (0.3-0.35 mm) are formed. GO was found to increase specific surface area of zirconium hydrophosphate and reduces it in the case of zirconium dioxide. Despite the small amount of GO additions, these composites show a growth of total sorption capacity of 12-14% in alkaline media. Sorption of cationic complexes of U(VI) under batch conditions was investigated. The composite based on zirconium hydrophosphate allows us to remove U(VI) from water practically completely in the presence of hardness ions; the highest regeneration degree is also achieved. Sorption kinetics is described by the model of pseudo-second order. The Dubinin-Raduchkevich model was applied to adsorption isotherms. As found, the mechanism of sorption is ion exchange that is accompanied by additional interaction of sorbed ions with functional groups.