Study on sorption of Cs from aqueous solution by microcapsules enclosing natural minerals

Chuan Pin Lee, Ming Chee Wu, Shih Chin Tsai, Ching Yuan Liu, Tsuey Lin Tsai, Lu Yen Ou

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2 Scopus citations


Zeolite, a natural mineral (Na8(AlO2)8(SiO2)40·20H2O) with an exchanger having high selectivity toward Cs, was encapsulated in a biopolymer matrices (sodium alginate, NaALG). The sorption of Cs on different microcapsules was investigated using batch methods under different conditions, such as time (1–24 h), acid (0.1–6 M HNO3), and salt concentration (0.001–1 M NaCl). Spherical and elastic granules were obtained, and the particle size of the microcapsules was about 700 μm. A relatively high sorption ratio of Cs (above 90 %) for MCs enclosing zeolite was obtained in the presence of 0.1–6 M HNO3 and 0.001–1 M NaCl solutions, with an equilibrium being attained within 5 h. The sorption isotherm of Cs followed a Langmuir-type equation. The relatively larger Kd value, 120 and 50 cm3/g, for Cs showed a selective sorption property in the presence of various metal ions under 2.5 M HNO3 and 1 M NaNO3.

Original languageEnglish
Pages (from-to)1743-1748
Number of pages6
JournalJournal of Radioanalytical and Nuclear Chemistry
Issue number3
StatePublished - 1 Mar 2016


  • Cs
  • Distribution coefficients
  • Microcapsules
  • Sorption
  • Zeolite


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