Adsorption Kinetics and Isotherms: A Safe, Simple, and Inexpensive Experiment for Three Levels of Students
Adsorption Kinetics and Isotherms: A Safe, Simple, and Inexpensive Experiment for Three Levels of Students
复制标题
吸附动力学和等温线：适合三个级别学生的安全、简单且廉价的实验
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
P. Piergiovanni
中科院分区：
文献类型：
--
作者：
P. Piergiovanni
吸附动力学和等温线教授给化学和工程专业的学生，对于理解水污染处理等操作非常重要，但许多学生没有机会进行实践实验，以实际和有形的方式展示理论。本文描述了一个实验，是廉价的，安全的，视觉上的结论，可用于各种学生观众：非科学和非工程专业的学生，一年级的工程专业的学生，和高年级的工程专业的学生。通过对织物的染色研究了吸附动力学和吸附等温线。所有学生都观察到染色的水变得无色，而吸附剂变暗。学生们使用分光光度计测量染料浓度作为时间的函数，发现数据遵循他们在微积分中学到的一阶过程。高年级的学生注意到一阶模型中的系统性错误，并确定二阶模型适合该过程。
Adsorption kinetics and isotherms are taught to chemistry and engineering students and are important to understanding operations such as water pollution treatment, yet many students do not have the opportunity to perform a hands-on experiment that demonstrates the theory in a practical and tangible way. This paper describes an experiment that is inexpensive, safe, and visually conclusive and can be used for a variety of student audiences: non-science and non-engineering students, first-year engineering students, and upper-level engineering students. Adsorption kinetics and isotherms were examined through the dyeing of fabric. All students observed the dyed water becoming colorless, while the adsorbent darkens. Students used the spectrophotometer to measure dye concentrations as a function of time and found that the data followed the first-order process they learned in calculus. Upper-division students noted a systematic error in the first-order model and determined that a second-order model fits the proce...