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Ruey-Shin Juang Horng-Chyuan Lin 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1995,62(2):132-140
Kinetic measurements were made for the sorption of copper ions from aqueous sulfate solutions with di(2-ethylhexyl)phosphoric acid-impregnated Amberlite XAD macroporous resins in finite bath by a batch-contact time method. The sorption process of copper was first determined to be controlled by particle diffusion using a modified shrinking-core mechanism, which considered reversibility of the sorption. A more rigorous model based on Fick's law was then applied to justify the applicability of the modified shrinking-core model to the present sorption systems. The effective particle diffusivity had an order of 10?12 (in m2 s?1), which was in agreement with those obtained for chelating ion-exchange processes. 相似文献