摘要
为了探讨2种典型的黏性土壤高岭石和伊利石对扑草净的吸附-解吸特性及机制,采取气相色谱-质谱法在不同温度下进行了吸附平衡实验,采用Langmuir和Freundlich模型对吸附数据进行拟合,最后进行了热力学分析。结果表明:随着温度升高,2种黏土矿物对扑草净的吸附量显著增加,表明吸附过程为吸热反应;Freundlich模型能更好地描述吸附过程,表明扑草净在黏土矿物上的吸附为多分子层吸附;吸附过程为自发进行的吸热反应并伴随着熵的增加。
In order to explore the adsorption desorption characteristics and mechanisms of two typical types of cohesive soils of kaolinite and illite for prometryne pesticide,by using gas chromatography-mass spectrometry,adsorption equilibrium experiments were conducted at different temperatures,Langmuir and Freundlich models were used to fit the adsorption data.Finally,the thermodynamic analysis was carried out.The results showed that as the temperature increased,the adsorption capacity of two clay minerals for prometryne pesticide significantly increased,indicating that the adsorption process was an endothermic reaction;Freundlich model could better describe the adsorption process,indicating that the adsorption of glyphosate on clay minerals was a multilayer adsorption;the adsorption process was a spontaneous endothermic reaction accompanied by an increase in entropy.
作者
金正熙
林庆文
JIN Zhengxi;LIN Qingwen(Institute of Geological Experiment of Anhui Province,Hefei Anhui 230001,China)
出处
《当代化工》
2025年第11期2688-2692,共5页
Contemporary Chemical Industry
关键词
扑草净
高岭石
伊利石
吸附-解吸特性
气相色谱-质谱法
热力学
状态方程
Prometryne
Kaolinite
Illite
Adsorption-desorption characteristics
Gas chromatography-mass spectrometry method
Thermodynamics
Equation of state
