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以硫酸锰和高锰酸钾为原料 ,合成了离子记忆无机离子交换剂—隐钾锰型水合二氧化锰 (CRYMO)。通过粉末X射线衍射以及热重分析确证了其晶体结构为α MnO2 ,化学式为MnO2 ·0 .4H2 O。考察了其对Na+ ,K+ ,Rb+ 的表观离子交换容量随溶液pH值的变化情况 ;离子交换等温线及分配系数曲线均表明隐钾锰型水合二氧化锰对K+ 和Rb+ 具有高选择性
Manganese sulfate and potassium permanganate were used as raw materials to synthesize ion-exchange inorganic ion exchangers, Hidden Manganese Manganese Hydrate Manganese Dioxide (CRYMO). By X-ray powder diffraction and thermal gravimetric analysis confirmed the crystal structure of α MnO2, chemical formula MnO2 · 0.4H2O. The changes of apparent ion exchange capacity of Na +, K +, Rb + with the pH value of the solution were investigated. The curves of ion exchange isotherms and partition coefficients showed that the potassium cryptate manganese hydrated manganese dioxide has high selectivity to K + and Rb +