TY - JOUR
T1 - Adsorption isotherms of caffeine and theophylline on metal-organic frameworks
AU - Lee, Yu Ri
AU - Tian, Minglei
AU - Kim, Se Na
AU - Ahn, Wha Seung
AU - Row, Kyung Ho
PY - 2014/9/1
Y1 - 2014/9/1
N2 - The adsorption behaviours of caffeine and theophylline on different metal-organic frameworks were examined by comparing their adsorption isotherms. Among C18, UIO-66, UIO-66-NH2 and MIL-125-NH2, UIO-66 showed the highest amount of adsorption of target compounds (i.e. caffeine and theophylline). The maximum adsorbed amounts of caffeine and theophylline on UIO-66 were 0.451 and 0.392 mg, respectively. The experimental parameters in the equilibrium isotherms were estimated by linear and non-linear regression analyses. The adsorption equilibrium data of caffeine and theophylline were investigated using the following four models: linear, Langmuir, Freundlich and Langmuir-Freundlich models. Of these models, the Langmuir-Freundlich model showed the best fit. The regression coefficients (r2) of the Langmuir-Freundlich model for adsorption of caffeine and theophylline on UIO-66 were 0.976 and 0.989, respectively.
AB - The adsorption behaviours of caffeine and theophylline on different metal-organic frameworks were examined by comparing their adsorption isotherms. Among C18, UIO-66, UIO-66-NH2 and MIL-125-NH2, UIO-66 showed the highest amount of adsorption of target compounds (i.e. caffeine and theophylline). The maximum adsorbed amounts of caffeine and theophylline on UIO-66 were 0.451 and 0.392 mg, respectively. The experimental parameters in the equilibrium isotherms were estimated by linear and non-linear regression analyses. The adsorption equilibrium data of caffeine and theophylline were investigated using the following four models: linear, Langmuir, Freundlich and Langmuir-Freundlich models. Of these models, the Langmuir-Freundlich model showed the best fit. The regression coefficients (r2) of the Langmuir-Freundlich model for adsorption of caffeine and theophylline on UIO-66 were 0.976 and 0.989, respectively.
UR - http://www.scopus.com/inward/record.url?scp=84919791960&partnerID=8YFLogxK
U2 - 10.1260/0263-6174.32.9.725
DO - 10.1260/0263-6174.32.9.725
M3 - Article
AN - SCOPUS:84919791960
SN - 0263-6174
VL - 32
SP - 725
EP - 735
JO - Adsorption Science and Technology
JF - Adsorption Science and Technology
IS - 9
ER -