Abstract:

Surface of ordinary bamboo-charcoal was pretreated with nitric acid and microwave heating,ammonia. Fourier transform infrared(FTIR)spectrometer, elemental analysis measurements demonstrate that the contents of O-containing groups and N-containing groups on the bamboo-charcoal surface increase via HNO₃ and NH₃·H₂O treatment. Results showed of adsorption that adsorption capacity of the modified bamboo-charcoal for metal ions were elevated remarkably. Among them, the mercury(Ⅱ)adsorption capacity increased by 25%, and palladium(Ⅱ)adsorption capacity increased by 32% or more. And the adsorption process was changed from the physical adsorption to the chemical adsorption. This study will expanded the applications of bamboo charcoal, and become into functional adsorption material.

Key words: surface modification of bamboo-charcoal, surface groups characterization, adsorption value of metal ion, adsorption type