Preparation and characterization of high efficient Ion-sieve H8Nb22O59•8H2O

DOI

10.2991/mmeceb-15.2016.145How to use a DOI?

Keywords

Na+; K+; ion sieve; H8Nb22O59•8H2O; high-purity sodium chloride.

Abstract

The adsorbent H8Nb22O59•8H2O and its precursor Rb8Nb22O59 were prepared to produce high-purify NaCl. Their characteristics were studied by X-ray diffraction (XRD), thermogravimetric and differential scanning calorimetry (TG-DSC) and scanning electron microscope (SEM). Two main calcinations factors of calcinations time and temperature were investigated. Results suggest that calcination time rarely influenced the crystal structure probably owing to the high calcination temperature. Furthermore, the high calcination temperature contributed to the stronger crystallinity of precursor Rb8Nb22O59, which shows that the structure of Rb8Nb22O59 was not changed by the extraction of Rb+ from Rb8Nb22O59 and this process is topotactical. Finally, the present absorbent of H8Nb22O59•8H2O exhibited the excellent selectivity for K+ ion, indicating that it can be considered as a promising adsorbent for the selective removal of K+ from sodium chloride solutions.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chang Wang
AU  - Pengfei Cao
AU  - Xianglong Zhang
AU  - Denghui Wang
AU  - Baojuan Dou
AU  - Ming Zeng
PY  - 2015/12
DA  - 2015/12
TI  - Preparation and characterization of high efficient Ion-sieve H8Nb22O59•8H2O
BT  - Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
PB  - Atlantis Press
SP  - 736
EP  - 739
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmeceb-15.2016.145
DO  - 10.2991/mmeceb-15.2016.145
ID  - Wang2015/12
ER  -