Abstract The adsorption process of activated carbon on fuchsin was quantitatively determined by handheld technology (Vernier colorimeter), and a systematic analysis was performed in combination with Python software. The results showed that the adsorption of fuchsin on activated carbon had two stages: rapid (0-1 h) and slow (1 h-4 h), and the adsorption equilibrium was reached in 4 h, with the maximum adsorption amount of 22.46 mg/g; the Redlich-Peterson model (R2=0.997 0) and the Langmuir model (R2=0.995 1) had the best fitting effect, indicating that monolayer adsorption was the dominant mechanism; the fitting degree of the pseudo-second-order kinetic model (R2=0.992 7) was better than that of the pseudo-first-order model, revealing that chemical adsorption dominated the process. By turning the qualitative experiment of traditional activated carbon adsorption of pigments into quantitative research, a complete experimental process from phenomenon observation to mechanism exploration is provided, which can not only help teachers improve their scientific understanding of the adsorption process, but also provide a reference for middle school chemistry experimental teaching and interdisciplinary practical activities.
LAN Hai-Hang. Adsorption Behavior of Activated Carbon on Fuchsin Based on Handheld Digital Experiment[J]. Chinese Journal of Chemical Education, 2025, 46(17): 78-83.
