【摘要】 将正长石与氯化钠进行混合,在810℃的温度条件下进行反应。对反应前后的样品进行XRF的定量成分分析。2 g长石与20 g NaCl反应时间分别为12、24、36、48、72 h,反应后Na2O含量从3.35%分别达到了9.05%、9.33%、10.1%、10.5%和10.8%;与40 g NaCl混合后长石中的Na2O含量则分别变为9.98%、10.3%、10.5%、10.9%和11.9%。反应12 h后正长石的离子交换速度减缓,离子交换量缓慢增加。计算离子交换反应的Na+分配系数,可以看出高浓度的NaCl熔盐相对于低浓度的熔盐,离子交换反应的分配系数值更高,反应进行的更加充分。正长石在高温条件下显示部分离子筛效应,可以成为良好的离子交换剂材料。更多还原

【Abstract】 In this study,orthoclase and sodium chloride powder were mixed up,and their chemical reaction was carried out at 810℃.The XRF analysis was applied to analyze the chemical composition before and after the reaction quantitatively.Two grams of orthoclase were mixed with 20 g and 40 g powders of NaCl,and the reaction lasted for 12,24,36,48,72 hours respectively.After mixture with 20 g NaCl,the contentof Na2O in orthoclase varied from 3.35%in original samples to 9.05%,9.33%,10.1%,10.5%and 10.8% in the resultant materials,separately.However,after mixture with 40 g NaCl,the content varied to 9.98%,10.3%, 10.5%,10.9% and 11.9% correspondingly in the same time span.Ion exchange velocities for orthoclase slowed down after 12 hours and the quantity of ion exchange increased slowly.The Na+distribution coefficient was calculated according to the formula of ion exchange reaction.The Na+distribution coefficient for molten salt of higher concentrationwashigherthan thatof lowerconcentrationin theexperimentand the reactionunderthe condition of higher concentration proceeded more thoroughly.Orthoclase could serve as a good material of ion exchange.更多还原