淀粉基炭的制备及其对重金属离子的吸附性能  

Fabrication of Starch-based Carbon and Adsorption Capacity for Heavy Metal Ions

作　　者：张雷[1] 李丹君[1] 李晶[1] 欧阳新平[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《精细化工》2010年第5期476-479,共4页Fine Chemicals

基　　金：广东省教育部产学研结合项目(2007B090400036)~~

摘　　要：通过不完全炭化淀粉制备出无定形淀粉基炭材料,用X射线粉末衍射,TGA-DSC,红外光谱和比表面积测定对其进行了表征;研究了淀粉基炭对Cu2+,Pb2+,Cd2+,Zn2+的吸附性能,考察了淀粉基炭投加量、pH、温度和金属离子初始质量浓度对吸附效果的影响。金属离子的去除率随着淀粉基炭投加量的增加而上升,各种金属离子的最佳吸附pH分别为7.0(Cu2+),6.0(Pb2+),8.0(Cd2+),8.0(Zn2+)。温度越高越有利于吸附,吸附行为符合Langmuir等温吸附方程。The starch-based carbon was prepared by the incomplete carbonation of starch and characterized by powder X-ray diffraction,TGA-DSC,infrared spectroscopy and BET.The adsorptions of Cu2＋,Pb2＋,Cd2＋ and Zn2＋ on the starch-based carbon were investigated.The effects of adsorbent dosage,pH value,adsorption temperature and initial metal concentration on the adsorption capacity were investigated in detail.The removal percentages of heavy metal ions increased with the adsorbent dosage increase.The optimum pH values were found to be 7.0 for Cu2＋,6.0 for Pb2＋,8.0 for Cd2＋and 7.0 for Zn2＋,respectively.A higher temperature was in favor of adsorption.The adsorption behaviors were well fitted to the liner Langmuir isotherms equation.

关 键 词：淀粉基炭 炭化 吸附 等温吸附模型 淀粉化学品 

分 类 号：TQ424.1[化学工程]