Published March 2020 | Version v1
Journal article Metadata-only

Ion exchange of Cs+ and Sr2+ by natural clinoptilolite from bi-cationic solutions and XRD control of their structural positioning

Creators

  • 1. Bulgarian Academy of Sciences, Sofia (Bulgaria). Institute of Mineralogy and Crystallography
  • 2. Bulgarian Academy of Sciences, Sofia (Bulgaria). Institute of Physical Chemistry
  • 3. Bulgarian Academy of Sciences, Sofia (Bulgaria). Institute of Polymers

Description

Clinoptilolite from Bulgaria was tested for uptake towards Cs+ and Sr2+ from bi-cationic solutions using batch technique. Contact time and cation concentrations were investigated, revealing minor difference in Cs+ sorption from single and mixed solutions but clear difference in Sr2+ uptake. Kinetic data were fit with pseudo-second-order kinetic model. The Langmuir isotherm model provided best description of equilibrium ion-exchange data [qmax (mg/g) is 122.7 for Cs+ and 21.50 for Sr2+]. Desorption experiments show that cesium and strontium ions are retained strongly by clinoptilolite. Rietveld structure refinement showed that approximately four Cs+ ions were exchanged versus one Sr2+ ion in clinoptilolite. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
323
Journal Issue
3
Journal Page Range
p. 1093-1102
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
51069206
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CESIUM IONS; CLINOPTILOLITE; ION EXCHANGE; SOLUTIONS; SORPTION; STRONTIUM IONS
Descriptors DEC
CHARGED PARTICLES; CLAYS; DISPERSIONS; HOMOGENEOUS MIXTURES; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IONS; MATERIALS; MINERALS; MIXTURES; SILICATE MINERALS; ZEOLITES

Optional Information

Notes
43 refs.