Equilibrium and rates of ammonium ion exchange by clinoptilolite.

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概要

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• The fundamental relations such as equilibrium and intraparticle diffusion in removal of ammonium from wastewaters by natural zeolite are examined by using two different clinoptilolite samples collected from Korea and Japan. The selectivity coefficient of ammonium ion versus sodium ion in these materials defined from mass action law, ?? does not take a constant value as in the case of organic exchange resin, but varies with degree of exchange, YNH4+, in the zeolite. Then it can be correlated as: ?? Also, the intraparticle diffusion coefficient was determined from ion exchange measurement in a stirred tank. The effective diffusion coefficient of the two ions in clinoptilolite was evaluated as 4-5 × 10-12m2/s.

• 公益社団法人 化学工学会の論文

著者

• HA Kl-SUNG

  Institute of Industrial Science, University of Tokyo

関連論文

• Equilibrium and rates of ammonium ion exchange by clinoptilolite.

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