吡嘧磺隆在高岭土、海泡石和沸石中的吸附行为研究

吡嘧磺隆在高岭土、海泡石和沸石中的吸附行为研究(8600字)

摘  要：为了解吡嘧磺隆在高岭土，海泡石和沸石中的吸附状态，使用批量平衡法，借助高效液相色谱检测技术，研究了吡嘧磺隆在高岭土、海泡石和沸石中的吸附行为。结果表明：吡嘧磺隆在海泡石和高岭土的吸附平衡时间为10h，在沸石中的吸附平衡时间为12h；随着吡嘧磺隆浓度的上升，吡嘧磺隆在海泡石、高岭土和沸石中的吸附浓度也随之上升，其吸附等温线符合Freundlich等温吸附线；当水溶液中的pH值在3-8时吡嘧磺隆在海泡石,高岭土和沸石中的吸附量变化不大，而当其pH值为9时其吸附量则会明显降低。
关键词：吡嘧磺隆；粘土矿物；批量平衡法；吸附行为

Adsorption behavior of Pyrazosulfuron on the Kaolin , Sepiolite and Zeolite

Abstract: In order to understand the Adsorption of Pyrazosulfuron on Kaolin,Sepiolite and Zeolite, using the batch equilibrium method，with high performance liquid chromatography,The adsorption behavior of pyrazosulfuron on Kaolin,Sepiolite and Zeolite was probed and its effect factor was studied too.The exprimental results showed that :The adsorption equilibrium time of pyrazosulfuron on kaolin and sepiolite was 10 hours,while that on zeolite was 12 hours;With the concentration of aqueous pyrazosulfuron increased,its adsorption capacity on three clay minerals tested also increased,its adsorption process could be described with the Freundlich adsorption isotherms.When the pH values of this aqueous solution changed from three to eight,on three clay minerals tested changed very little,but when its pH values increased to nine,that decreased obvious.
Key words: Pyrazosulfuron；Clay minerals；Batch equilibrium method ；Adsorption behavior;
 

目  录

摘要    1
关键词    1
1 前言    2
1.1 吡嘧磺隆除草剂的简介    2
1.2 粘土矿物    3
2 研究目的和内容    5
2.1 研究目的    5
2.2 研究内容    5
3 材料与设计    5
3.1 实验材料    5
3.1.1 主要试剂    5
3.1.2 主要仪器    5
3.2 实验设计    5
3.2.1 吡嘧磺隆在高岭土、海泡石和沸石中的吸附动力学过程    5
3.2.2 吡嘧磺隆在高岭土、海泡石和沸石中的等温吸附实验    6
3.2.3 pH值对吡嘧磺隆在高岭土、海泡石和沸石中的吸附影响    6
4 结果与分析    6
4.1 HPLC分析吡嘧磺隆的标准曲线    6
4.1.1 吡嘧磺隆的HPLC分析条件    6
4.1.2 吡嘧磺隆标准曲线    7
4.2 吡嘧磺隆在高岭土、海泡石和沸石中的吸附动力学过程    7
4.3 吡嘧磺隆在高岭土、海泡石和沸石中的等温吸附实验结果    9
4.4 pH值对吡嘧磺隆在高岭土、海泡石和沸石中的吸附行为影响    10
5 结论    12
参考文献    12
致谢    14