Adsorption of bulky molecules of nonylphenol ethoxylate on ordered mesoporous carbons.
Ordered mesoporous carbons (OMCs) with varying pore sizes were prepared using ordered mesoporous silica SBA-15 as hard templates. The OMCs possess abundant mesopores with narrow pore size distribution, on which the adsorption behavior of bulky molecules of nonylphenol ethoxylate (NPE) were investigated. The isotherms of NPE on OMCs can be fitted by Langmuir adsorption model, evidenced by the adsorption data. The surface area of the pores larger than 1.5 nm is a crucial factor to the adsorption capacity of NPE, whereas the most probable pore diameter of OMCs is crucial to the adsorption rate of NPE. The adsorption temperature has more significant effects on adsorption rate than the adsorption capacity. Theoretical studies show that the adsorption kinetics of NPE on OMCs can be depicted with the pseudo-second-order kinetic model. In addition, thermodynamic parameters of adsorption were evaluated based on the equilibrium constants related to the equilibrium of adsorption at different temperatures.
Yuan
Xun
X
School of Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China.
Xing
Wei
W
Zhuo
Shu-Ping
SP
Si
Weijiang
W
Gao
Xiuli
X
Han
Zhaohui
Z
Yan
Zi-Feng
ZF
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry*; D007700:Kinetics; D012822:Silicon Dioxide; D013499:Surface Properties; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D020099:Coated Materials, Biocompatible; D005026:Ethylene Glycols; D014874:Water Pollutants, Chemical; C021754:terics; D002244:Carbon; D012822:Silicon Dioxide