In this study, rice husk and mulberry branch, which are the agricultural wastes, were utilized to prepare the biomass chars as the precusors. The physical activation method of usig steam as the activation gas was adopted in this study for its easy operation and causing little pollution. Also the researches about using the biomass chars to remove Cu2+, Cr6+and NH4+-N from aqueous solution were carried out in this study.
The biomass chars and precusors were charaterized with scanning electron microscope,...