Origin自定义函数拟合在分析土壤吸附等温模型中的应用

摘要

由于吸附等温线线性拟合存在着随意性和误差性,因此在土壤对铜的吸附测试的实验数据中,Freundlich吸附等温线性模型的处理方法可能存在着不足.为此,提出了利用Origin自定义函数拟合非线性吸附等温模型,如Langmuir、Freundlich、Temkin、Redlich-Peterson、Koble-Corrigan和Toth模型,不但可以消除线性模型所带来的误差,而且可以让学生更全面地理解吸附等温模型,学会用Origin自定义函数拟合功能对实验数据进行更科学的处理.%Due to the existence of the randomness and error in the linear fitting of adsorption isotherm, the deficiencies may exist in the treatment method of Freundlich adsorption isotherm linear model according to the experimental data of adsorption test of copper in soil.For this reason, it is proposed to use the nonlinear adsorption isotherm models of Origin self-defined function fitting such as Langmuir, Freundlich, Temkin, Redlich-Peterson, Koble-Corrigan and Toth, which can not only eliminate the error caused by the linear models, but also help the students to understand isotherm models more comprehensively, and learn how to apply the function of Origin self-defined function fitting to more scientific treatment of experimental data.