scholarly journals SYNTHESIS OF HYDROTALCITE Zn-Al-SO4 AS ANION EXCHANGER AND ITS APPLICATION TO TREAT OF POLLLUTANT CONTAINED HEXACYANOFERRAT(II)

2010 ◽  
Vol 8 (3) ◽  
pp. 307-313 ◽  
Author(s):  
Roto Roto ◽  
Iqmal Tahir ◽  
Umi Nur Sholikhah
Keyword(s):  
Ion Exchange ◽  
Hydrothermal Treatment ◽  
Anion Exchanger ◽  
Absorption Spectrometry ◽  
Exchange Capacity ◽  
Ion Exchange Reaction ◽  
Ir Spectrophotometry ◽  
Xrd Patterns ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

Synthesis of Zn-Al-SO4 hydrotalcite and its application as anion exchanger for hexacyanoferrat (II) have been studied. Synthesis of Zn-Al-SO4 hydrotalcite was carried out by stoichiometric method and hydrothermal treatment. Sulphate in hydrotalcite interlayer was exchanged by hexacyanoferrat (II) that was assumed as pollutant. Kinetics of ion exchange was also investigated. The product of ion exchange was characterized by XRD, IR spectrophotometry and atomic absorption spectrometry. Zn-Al-SO4 hydrotalcite can be obtained by stoichiometric method at pH 8 and followed by hydrothermal treatment. The chemical formula of the hydrotalcite was Zn0.74Al0.26(OH)1.74(SO4)0.13.0.52H2O. The hexacyanoferrat (II) anion could exchange sulphate in hydrotalcite interlayer as showed by IR spectra and XRD patterns. The anion exchange capacity was 645.35 meq/100 g, and the kinetics of ion exchange reaction was first order with k = 5 x 10-5 s-1. It showed that Zn-Al-Fe(CN)6  could be regenerated easily, so it has been regenerate frequently.   Keywords: hydrotalcite, anion exchanger, hexacyanoferrat

Kinetics of Ion-Exchange Reactions in Hybrid Organic–Inorganic Perovskite Thin Films Studied by In Situ Real-Time X-ray Scattering

2018 ◽  
Vol 9 (23) ◽  
pp. 6750-6754 ◽  
Author(s):  
Alessandro Greco ◽  
Alexander Hinderhofer ◽  
M. Ibrahim Dar ◽  
Neha Arora ◽  
Jan Hagenlocher ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Exchange ◽  
Real Time ◽  
Exchange Reactions ◽  
Inorganic Perovskite ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

scholarly journals The Li+, Na+ and K+ ion exchange reaction process on the surface of mixed oxide SiO2/TiO2/Sb2O5 surface prepared by the sol-gel processing method

2005 ◽  
Vol 30 (1) ◽  
pp. 51-58 ◽  
Author(s):  
C. U. Ferreira ◽  
J. E. Gonçalves ◽  
Y. V. Kholin ◽  
Y. Gushikem
Keyword(s):  
Ion Exchange ◽  
Mixed Oxide ◽  
Exchange Process ◽  
Sol Gel ◽  
Exchange Capacity ◽  
Processing Method ◽  
Exchange Property ◽  
Ion Exchange Process ◽  
Ion Exchange Reaction ◽  
Gel Processing

The porous mixed oxide SiO2/TiO2/Sb2O5 obtained by the sol-gel processing method presented a good ion exchange property and a high exchange capacity towards the Li+, Na+ and K+ ions. In the H+/M+ ion exchange process, the H+ / Na+ could be described as presenting an ideal character. The ion exchange equilibria of Li+ and K+ were quantitatively described with the help of the model of fixed tetradentate centers. The results of simulation evidence that for the H+ / Li+ exchange the usual situation takes place: the affinity of the material to the Li+ ions is decreased with increasing the degree of ion exchange. On the contrary, for K+ the effects of positive cooperativity, that facilitate the H+ / K+ exchange, were revealed.

Kinetics of ion-exchange in sodium rare-earth silicates

1985 ◽  
Vol 17 (2) ◽  
pp. 121-126 ◽  
Author(s):  
K YAMASHITA ◽  
P NICHOLSON
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

Solid-phase nanoreactor based on calix[4]resorcinarene: Gel diffusion kinetics of ion exchange

2009 ◽  
Vol 43 (1) ◽  
pp. 43-49 ◽  
Author(s):  
O. H. Altshuler ◽  
N. V. Malyshenko ◽  
G. J. Shkurenko ◽  
H. N. Altshuler
Keyword(s):  
Ion Exchange ◽  
Solid Phase ◽  
Diffusion Kinetics ◽  
Kinetics Of ◽  
Gel Diffusion ◽  
Kinetics Of Ion Exchange

scholarly journals The kinetics of ion exchange on natural sediments

1986 ◽  
Vol 22 (12) ◽  
pp. 1664-1674 ◽  
Author(s):  
Alan P. Jackman ◽  
King T. Ng
Keyword(s):  
Ion Exchange ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange
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