| 王晓,姜虹,王爱丽.化学通报,2015,78(11):1049-1052. |
| 低品位盐矿中K+、Na 的溶解动力学研究 |
| RESEARCH ON THE DISSOLUTION KINETICS OF K , Na IN LOW-GRADE SALT MINES |
| 投稿时间：2015-03-05 修订日期：2015-05-17 |
| DOI： |
| 中文关键词: 溶剂类型 溶解动力学 非线性拟合 stumm模型 |
| 英文关键词:Solvent type dissolution kinetics nonlinear fitting stumm modle |
| 基金项目:国家科技支撑项目(2012BAC09B05)资助 |
|
| 摘要点击次数: 2088 |
| 全文下载次数: 0 |
| 中文摘要: |
| 为了更好地研究马海盐矿中K+、Na 溶解性能和溶解规律,根据本课题组之前正交试验结果分别选取质量分数为13.24%(即饱和度为50%)的NaCl溶液和NaCl MgCl2混合溶液(NaCl、MgCl2质量分数分别为13.24%、3%)为溶剂分别进行试验,并与水作比较,从而得出其在不同溶剂中的溶解动力学方程。测得数据绘制离子c-t图,进行非线性拟合后得到溶解动力学曲线；再用龙格-库塔微分方程组和单纯形优化法拟合求解stumm模型中的K、n两个参数,程序由matlab编写,最终确定离子的溶解动力学方程并得出不同溶剂中K 、Na 的溶解规律：溶剂中加入NaCl时,矿液中K 的溶解速率明显增大,且矿液中Na 的溶解速率大幅度减小；再引入Mg2 ,K 的溶解速率明显增大,溶解速率常数K由0.1126增大到0.8749,且矿液中Na 的溶解速率常数K也保持在10^-10级水平。 |
| 英文摘要: |
| In order to investigate the dissolution performance and rules of Mohair salt in different solvents, the dissolution tests were carried out. According to the our group’s previous orthogonal experiment, mass fraction of 13.24% (saturation of 50%) NaCl solution and mass fraction of 13.24% mass fraction of 3% MgCl2 solution were chosen as solvent for the dissolution tests, respectively, and the results were compared with the blank test which used pure water as solvent, and the dissolution kinetics of K , Na of Mohair salt mine in different conditions were calculated. Date was described by ion c-t chart, and dissolve kinetics curves were made by nonlinear fitting. Two parameters, K and n, of the stumm model were calculated by Runge-Kutta differential equations and simplex method. All the calculation was realized by matlab program. According to the the dissolution kinetics, the dissolution rules of K , Na in different conditions were found: After adding NaCl, the dissolution rate of K increased while the dissolution rate of Na decreased; On the basis of the top, the dissolution rate of K increased much obviously, and the rate constant of K increased from 0.1126 to 0.8749, and the rate constant of Na remained around 10^-10. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|