Novel sandwich structure adsorptive membranes for removal of 4-nitrotoluene from water.
Novel sandwich PES-SPES/PS-PDVB/PTFE adsorptive membranes were prepared by a filtration/immersion precipitation method and employed for the removal of 4-nitrotoluene from water. The static adsorption thermodynamics, kinetics, dynamic adsorption/desorption and membrane reusability were investigated. The results showed that the Freundlich model describes the adsorption isotherm satisfactorily. With increased PS-PDVB content, the maximum static adsorption capacity, partition coefficient, apparent adsorption rate constant, and dynamic adsorption capacity all significantly increased. The sandwich membranes showed much higher removal efficiency and adsorption capacity than those of mixed matrix membranes. With respect to dynamics adsorption/desorption, the sandwich membranes exhibited excellent reusability, with a removal efficiency greater than 95% even after five recycles.
College of Chemistry, Beijing Normal University, Beijing 100875, PR China; School of Pharmacy, North China University of Science and Technology, Tangshan 063000, PR China.
Yuexin
Y
Guo
College of Chemistry, Beijing Normal University, Beijing 100875, PR China. Electronic address: zhqjia@bnu.edu.cn.
Zhiqian
Z
Jia
4-Nitrotoluene; Adsorption; Adsorptive membrane; PS-PDVB microspheres; Sandwich structure