Adsorption of 2,4,6-trinitrotoluene on a novel adsorption material PEI/SiO2.
In this paper, functional macromolecule polyethyleneimine (PEI) was grafted onto the surface of silica gel particles in order to produce the novel adsorption material, PEI/SiO2. Then this novel material's adsorption properties for TNT were investigated through static methods, and the experimental results showed that PEI/SiO2 possessed strong adsorption ability for TNT. In fact, the saturated adsorption amount could reach 14.47 mg g(-1). The empirical Freundlich isotherm was also found to describe well the equilibrium adsorption data. In addition, the pH and temperature were found to have great influence on the adsorption amount. Finally, PEI/SiO2 was observed to possess excellent reusability properties as well.
An
Fuqiang
F
Department of Chemistry, North University of China, Taiyuan 030051, People's Republic of China.
Gao
Baojiao
B
Feng
Xiaoqin
X
D000327:Adsorption; D015386:Hazardous Substances / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D011094:Polyethyleneimine / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D014303:Trinitrotoluene / Q000302:isolation & purification*
D015386:Hazardous Substances; D014303:Trinitrotoluene; D012822:Silicon Dioxide; D011094:Polyethyleneimine