Effect of sorption conditions on the state of copper(II) ions in the phase of AN-31 ion exchange resin, according to data from ESR and UV–vis diffuse reflectance spectroscopy


如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅存取

详细

It is found that the sorption recovery of copper ions from water solutions in the phase of AN-31 low basicity anion exchanger has a mixed character. It is established via diffuse reflectance spectroscopy that ions are stabilized through complexation with the participation of the functional groups of the sorbent with the formation of structures [Cu(NR3)2(OH)2(H2O)2], [Cu(NR3)3(OH)(H2O)2], and as a result of the physical adsorption of oxide dimers and planar-squared copper clusters. It is shown that increasing the ionic strength of a solution by introducing sodium chloride into the system greatly improves the capacity of the sorbent and leads to the uniform distribution of copper ions in the resin matrix. The similarity between the ESR spectrum parameters of copper-containing samples of the ion exchanger, obtained in a wider range of pH, is determined via ESR and testifies to the homogeneity of the stabilization positions of Cu2+ ions. The crystalline field of tetragonal-elongated octahedron is typical of all Cu2+ ions. All of the complexes have Cu(NO3)2 coordination nodes with the covalent bonding of Cu2+ ions and the amine groups of the sorbent.

作者简介

E. Stroganova

Orenburg State University

编辑信件的主要联系方式.
Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Orenburg, 460018

V. Anufrienko

Boreskov Institute of Catalysis

Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Novosibirsk, 630090

T. Larina

Boreskov Institute of Catalysis

Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Novosibirsk, 630090

N. Vasenin

Boreskov Institute of Catalysis

Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Novosibirsk, 630090

Yu. Lebedev

Institute of the Physics of Molecules and Crystals

Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Ufa Scientific Center, Ufa, 450075

V. Parmon

Boreskov Institute of Catalysis

Email: Stroganova_Helen@mail.ru
俄罗斯联邦, Novosibirsk, 630090

补充文件

附件文件
动作
1. JATS XML

版权所有 © Pleiades Publishing, Ltd., 2017