文摘
Two biosorbents were prepared using bamboo powder modified with mercaptoacetic acid and carbon disulfide, which exhibits strong adsorption properties for Cu2+ and Ni2+. The obtained materials were characterized by FTIR. Maximum adsorption for both metals was found to occur around pH 5.0-.5. The kinetic data followed the pseudo-second-order model. The maximum adsorption capacities of Cu2+ and Ni2+ on mercaptoacetic acid modified bamboo powder determined from Langmuir isotherm were 103.97mg g? and 61.35mg g?, respectively. While on carbon disulfide modified bamboo powder were 128.21mg g? and 56.82mg g?, respectively. The adsorption mechanism analysis revealed that the most possible adsorption mode of Cu2+ was coordination, and Ni2+ was ion exchange. The obtained adsorbents could effectively remove Cu2+ and Ni2+ from industrial electroplating wastewater and could be used repeatedly for more than five cycles.