本研究是在探討利用丁氧基乙醇(Ethylene glycol monobutyl ether, EGMBE)為修飾劑,二氯甲烷為稀釋劑,2-乙基己基膦酸單-2-乙基己基酯 (PC-88A)為萃取劑製備成的萃取劑含浸樹脂 (Extractant-impregnated resin, EIR),在不同的操作條件下,改變錳離子初濃度、不同EIR的使用量及改變溫度,與硫酸錳水溶液吸附平衡後,其金屬離子之吸附情形,並尋求相符的吸附模式。 在此實驗我們使用大孔性樹脂Amberlite XAD-4爲載體,將尚未含浸修飾劑及萃取劑的空白樹脂在不同濃度(0.001M~0.02M)的硫酸錳水溶液中進行吸附測試,結果顯示,空白之Amberlite XAD-4對上述各種不同濃度的硫酸錳水溶液,並無明顯吸附離子的情形。由此空白實驗可證實樹脂本身僅為載體並不參與反應。 由實驗數據得知,水溶液中錳離子的含量隨著萃取劑PC-88A含量的增加而遞增,亦隨著溶液的pH值的增加而遞增,但隨著金屬離子之初濃度增加而減少。 並由結果顯示樹脂萃取錳離子的吸附模式可用Langmuirh吸附等溫線來描述之,亦是屬於BET吸附等溫型式。另外,實驗結果經由實驗圖表分析,在有機相錳錯合物的組成分別為 和 ,而萃取平衡常數分別為 及 (mol/m3)-0.5,在此系統錳吸附焓Ha為39.67 kJ/mol。
In this paper, we used the 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 investigated the adsorption of metal ions after reaching equilibrium between Manganese sulfate aqueous solutions and EIR. We also tried to fit the experiments data base on available models, we also used Amberlite XAD-4 as a support in the absence of extractant and modifier, investigate its Manganese ion adsorption capability. Data from blank experiments revealed that Amberlite XAD-4 shows no significant adsorption capability on Manganese ions and acted mainly as a support. Based on the results, it can be concluded that the distribution ratio of Manganese ion increased with increasing in both amount of PC-88A and pH value of aqueous solutions, but decreased while the initial concentration of Manganese ion increased. The results also reveal the adsorption mode of extract Manganese ions can be described by the Langmuir and BET isotherm. Graphical analysis of the results from extraction equilibrium indicates that Manganese PC-88A complex, in the organic phase are and with the extraction equilibrium constants of 5.83×10-11 and 1.30×10-10 (mol/m3)-0.5. respectively. In this system enthalpy energy ( H ) is 39.67 kJ/mol.