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The removal of cesium ion with natural Itaya zeolite and the ion exchange characteristics
Author(s) -
Endo Masatoshi,
Yoshikawa Eishi,
Muramatsu Natsumi,
Takizawa Norifumi,
Kawai Takahiro,
Unuma Hidero,
Sasaki Atsushi,
Masano Akihisa,
Takeyama Yoshiyuki,
Kahara Tomoo
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4140
Subject(s) - zeolite , clinoptilolite , ion exchange , mordenite , chemistry , adsorption , caesium , inorganic chemistry , cation exchange capacity , potassium , selectivity , nuclear chemistry , ion , catalysis , organic chemistry , environmental science , soil science , soil water
BACKGROUND The large Itaya zeolite deposit in Yonezawa, Japan produces good quality, natural zeolite. Its properties as an adsorbent and a functional carrier were assessed and the ion exchange characteristics examined. Natural zeolite has a useful high cation exchange capacity, but has a disadvantage in scattering of the powder. In this study a nonwoven fabric containing zeolite was tested for the removal of cesium.RESULTS The X‐ray diffraction ( XRD ) peak pattern confirmed that Itaya zeolite is mainly clinoptilolite and contains some mordenite. Ion exchange selectivity of the natural zeolite was Ag + > Pb 2+ > Cu 2+ > Zn 2+ > Cd 2+ > Cr 3+ > Ni 2+ with almost 100% removal of Ag + and Pb 2+ ions. The cation exchange capacity ( CEC ) of Itaya zeolite was 131 cmol kg ‐1 . Low concentrations of Cs + were removed effectively from the solution with natural zeolite. Cesium ions were removed by ion exchange with potassium and sodium. Cs + was desorbed from the zeolite with ammonium salt solutions. Elution of Cs + was influenced by the coordination ability of counter anions.CONCLUSION Satisfactory results were obtained using zeolite‐containing nonwoven fabric for the removal of cesium ions. © 2013 Society of Chemical Industry