The addition of inert particles of lighter density and smaller diameter increases considerably the mass transfer coefficient in comparison to that of mono-component active particles at the same liquid velocity. This effect was applied to elimination of copper ions by adsorption on a chelating resin. An intensification of the film mass transfer coefficient in binary system leads to a 15 % increase of the usable adsorbent efficiency.
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Yang et al. (2000) studied this question.
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