TY - JOUR ID - TI - Removal of heavy metals from aqueous solution by carbon nanotubes:adsorption equilibrium and kinetics AU - LI Yan-hui AU - DI Ze-chao AU - LUAN Zhao-kun AU - DING Jun AU - ZUO Hua AU - WU Xiao-qing AU - XU Cai-Lu AU - WU De-hai VL - 16 IS - 2 PB - SP - 208 EP - 211 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=20040208&flag=1 KW - carbon nanotubes; heavy metals; adsorption KW - carbon nanotubes; heavy metals; adsorption AB - Carbon nanotubes prepared by catalytic chemical vapor deposition of hydrocarbon at 650℃ show goodadsorption capability of Pb2+ , Cu2+ and Cd2+ ions from aqueous solution after oxidized with concentrated nitric acidat 140℃ for 1 h. The specific surface area and particle size distribution of the as-grown and oxidized CNTs werestudied by BET method and laser particle analyzer. Three kinetic models, that is, first-, pseudo second- andsecond-order, were used to investigate the adsorption data and the pseudo second-order model can represent theexperimental data better than two others. The equilibrium data fitted well with the Langmuir model and showed thefollowing adsorption order: Pb2+ > Cu2+ > Cd2+. ER -