低分子量有机酸对钾长石中元素促释性能研究  

Effect of low-molecular-weight organic acids on element release from potash feldspar

作　　者：陈太平[1,2] 韩效钊[1] 郑云霞[1] 姚卫棠[1] 

机构地区：[1]合肥工业大学 化学工程学院,安徽 合肥 230009 [2]合肥工业大学 化学工程学院,安徽 合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2014年第3期343-346,384,共5页Journal of Hefei University of Technology：Natural Science

基　　金：广东省教育部产学研结合资助项目(2011B090400174)

摘　　要：文章研究了钾长石矿在低分子量有机酸作用下的钾、铝、铁释放效果,其中草酸处理钾累计释放量相对最大,铁累计释放量也明显高于其他几种有机酸,酒石酸处理铝累计释放量相对最大。采用3种动力学方程描述了5种有机酸处理钾长石过程中钾、铝、铁的释放动力学,其中Elovich方程、抛物线扩散方程、双常数方程对钾释放拟合效果都较好,均达到极显著水平,Elovich方程和双常数方程能较好地拟合钾长石中铝、铁的释放过程。The effect of organic acids with low molecular weight on releasing potassium ,aluminum and iron from potash feldspar was investigated .Cumulative release of potassium and iron could achieve maximum when potash feldspar was treated by oxalic acid .Cumulative release of aluminum was rela-tively large when potash feldspar was treated by tartaric acid .Three kinetic equations were employed to describe the release kinetics of potassium ,aluminum and iron when potash feldspar was treated by five kinds of organic acids .The release of potassium could be fitted well by Elovich equation ,parabol-ic diffusion equation and double constant equation and the significant level was extremely high .Elov-ich equation and double constant equation fitted the process of releasing aluminum and iron in potash feldspar better .

关 键 词：钾长石 低分子量有机酸 释放动力学 

分 类 号：S153[农业科学—土壤学]