Sorption of norfloxacin from aqueous solutions by activated carbon developed from Trapa natans husk  

作　　者：XIE HuiJun LIU WeiFeng ZHANG Jian ZHANG ChengLu REN Liang 

机构地区：[1]Environment Research Institute,Shandong University,Jinan 250100,China [2]Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering,Shandong University,Jinan 250100,China

出　　处：《Science China Chemistry》2011年第5期835-843,共9页中国科学（化学英文版）

基　　金：support from the National Key Technology R&D Program for the Eleventh Five-year Plan (2006BAC10B03);Major National Science and Technology Project (2009ZX07210-009);Graduate Independent Innovation Foundation of Shandong University (2009JQ009)

摘　　要：The low-cost activated carbon was prepared from a renewable aquatic plant residue,Trapa natans husk,and tested for its ability to remove norfloxacin (NOR) from aqueous solutions. Physical and chemical properties of the Trapa natans husk activated carbon (TAC) were characterized. TAC has a large surface area of 1274 m2/g and mesoporous structure. Carboxylic and hydroxyl groups contributed to the sorption of NOR onto TAC but they were not the most important factors in the sorption process. The rates of adsorption followed the pseudo-second-order kinetics and the overall rate of NOR uptake was controlled by both external mass transfer and intro particle diffusion during the entire adsorption period. The equilibrium data fitted well with the Freundlich and Tempkin models and the sorption was found to be a favorable process. The adsorption of NOR by TAC was strongly dependent on the solution pH. Electrostatic interaction and hydrophobic interaction were proposed to be the principal NOR sorption mechanism.The low-cost activated carbon was prepared from a renewable aquatic plant residue,Trapa natans husk,and tested for its ability to remove norfloxacin （NOR） from aqueous solutions. Physical and chemical properties of the Trapa natans husk activated carbon （TAC） were characterized. TAC has a large surface area of 1274 m2/g and mesoporous structure. Carboxylic and hydroxyl groups contributed to the sorption of NOR onto TAC but they were not the most important factors in the sorption process. The rates of adsorption followed the pseudo-second-order kinetics and the overall rate of NOR uptake was controlled by both external mass transfer and intro particle diffusion during the entire adsorption period. The equilibrium data fitted well with the Freundlich and Tempkin models and the sorption was found to be a favorable process. The adsorption of NOR by TAC was strongly dependent on the solution pH. Electrostatic interaction and hydrophobic interaction were proposed to be the principal NOR sorption mechanism.

关 键 词：NORFLOXACIN Trapa natans husk activated carbon adsorption kinetic and isotherms 

分 类 号：TQ127.2[化学工程—无机化工] X783.03[环境科学与工程—环境工程]