Removing Cd^(2+) by Composite Adsorbent Nano-Fe_3O_4/Bacterial Cellulose  

作　　者：LU Min GUAN Xiao-hui WEI De-zhou 

机构地区：[1]School of Chemical Engineering, Northeast Dianli University, Jilin 132012, P. R. China [2]School of Resources ＆ Civil Engineering, Northeastern University, Shenyang 110004, P. R. China

出　　处：《Chemical Research in Chinese Universities》2011年第6期1031-1034,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.50174014)

摘　　要：A new composite adsorbent, nano-Fe3O4/bacterial cellulose（BC）, was prepared through blending method. The process of adsorbing Cd2＋ including its isotherm and kinetics measured was studied. The results show that the adsorption efficiency is improved because of huge surface area and surface coordination of nano-Fe3O4 particles. Its adsorption capacity is 27.97 mg/g and the maximum of Cd2＋ removal is 74%. The adsorption kinetics can be described by pseudo-second rate model and the adsorption equilibrium by Langmuir type. The superparamagnetism of nano-Fe3O4 particles can help to solve the difficult separation of single BC adsorbent and lead to the quick separation of composite adsorbent from the liquid if a magnetic field was applied. Cd2＋ can be desorbed effectively by EDTA and HCl from the composite adsorbent, which can make it be reused.A new composite adsorbent, nano-Fe3O4/bacterial cellulose（BC）, was prepared through blending method. The process of adsorbing Cd2＋ including its isotherm and kinetics measured was studied. The results show that the adsorption efficiency is improved because of huge surface area and surface coordination of nano-Fe3O4 particles. Its adsorption capacity is 27.97 mg/g and the maximum of Cd2＋ removal is 74%. The adsorption kinetics can be described by pseudo-second rate model and the adsorption equilibrium by Langmuir type. The superparamagnetism of nano-Fe3O4 particles can help to solve the difficult separation of single BC adsorbent and lead to the quick separation of composite adsorbent from the liquid if a magnetic field was applied. Cd2＋ can be desorbed effectively by EDTA and HCl from the composite adsorbent, which can make it be reused.

关 键 词：NANO-FE3O4 Bacterial cellulose Composite adsorbent Cadmium ion 

分 类 号：TQ424.3[化学工程] O636.11[理学—高分子化学]