摘要
合成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 ,其化学式为MnO2 ·0 4H2 O 考虑了其对Na+ 、K+ 的表观离子交换容易随溶液 pH值的变化情况 ;分配系数及分离系数的测定结果均表明CRYMO对K+ 具有高选择性 ,可用于溶液中Na+ 、K+
Cryptomelane-type Hydrous Manganese Dioxide(CRYMO) was synthesized.It's a kind of inorganic ion-memory exchanger.Its crystal structure and chemical formula were determined by power X-radiation diffraction and thermal gravity analysis.It belonged to α-MnO 2. Its chemical formula was MnO 2·0 4H 2O.Changes of its apparent ion-exchange capacity of Na +?K + with pH value of solution were studied.Both ion-exchange isotherms and distribution plots have shown CRYMO has high ion-exchange selectivity to K + and can be used to separated Na +,K +in aqueous solution.
出处
《贵州大学学报（自然科学版）》
2001年第2期124-126,共3页
Journal of Guizhou University:Natural Sciences
