Adsorption laboratory experiment for undergraduate chemical engineering: Introducing kinetic, equilibrium and thermodynamic concepts

2nd International Conference on Chemical Engineering (ICCE) UNPAR

Muryanto, S.^1 ; Hadi, S Djatmiko^1

Department of Chemical Engineering, UNTAG University in Semarang, Bendhan Dhuwur Campus, Semarang

50233, Indonesia^1

关键词: Adsorbent dose;    Adsorption capacities;    Adsorption process;    Adsorption time;    Chemical engineering programs;    Kinetic data;    Laboratory experiments;    Pseudo first-order kinetics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/162/1/012004/pdf
DOI  :  10.1088/1757-899X/162/1/012004

来源: IOP

【 摘 要 】

Adsorption laboratory experiment for undergraduate chemical engineering program is discussed. The experiment demonstrated adsorption of copper ions commonly found in wastewater using bio-sorbent, i.e. agricultural wastes. The adsorption was performed in a batch mode under various parameters: adsorption time (up to 120 min), initial pH (2 to 6), adsorbent dose (2.0 to 12.0 g L-1), adsorbent size (50 to 170 mesh), initial Cu2+concentration (25 to 100 ppm) and temperatures (room temp to 40°C). The equilibrium and kinetic data of the experiments were calculated using the two commonly used isotherms: Langmuir and Lagergren pseudo-first-order kinetics. The maximum adsorption capacity for Cu2+was found as 94.34 mg g-1. Thermodynamically, the adsorption process was spontaneous and endothermic. The calculated activation energy for the adsorption was observed as high as 127.94 kJ mol-1. Pedagogically, the experiment was assumed to be important in increasing student understanding of kinetic, equilibrium and thermodynamic concepts.