The removal of cesium ion with natural Itaya zeolite and the ion exchange characteristics | Zendy

Endo Masatoshi | Zendy; Yoshikawa Eishi | Zendy; Muramatsu Natsumi | Zendy; Takizawa Norifumi | Zendy; Kawai Takahiro | Zendy; Unuma Hidero | Zendy; Sasaki Atsushi | Zendy; Masano Akihisa | Zendy; Takeyama Yoshiyuki | Zendy; Kahara Tomoo | Zendy

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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

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