| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 99 === In this study, we used ethylene glycol monobutyl ether, EGMBE as the modifier, dichloromethane as the diluents, and PC-88A as the extractant. All of them were rendered into the extractant-impregnated resin, EIR, We examined the effects of various parameter, such as the initial concentration of the metal ions, the amount of EIR and the operating temperature. We also investigated the adsorption of metal ions after reaching equilibrium between Chromium nitrate aqueous solutions and EIR.
We also tried to fit the experiments data to available models, We also used Amberlite XAD-4 as a support in the absence of extractant and modifier and investigated its chromium ion adsorption capability. Data from blank experiments revealed that Amberlite XAD-4 shows no significant adsorption capability on chromium ions and acted mainly as a support.
Based on the results, it can be concluded that the distribution ratio of chromium ion increased with increasing in both amount of PC-88A and pH value of aqueous solutions, but decreased while the initial concentration of chromium ion increased.The results also showed that the adsorption mode of extract chromium ions can be described by the Freundlich isotherm.
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