谷氨酸插层水滑石吸附水中铅离子  

REMOVAL OF LEAD ION FROM AQUEOUS SOLUTION USING GLUTAMATE INTERCALATED LAYERED DOUBLE HYDROXIDE

作　　者：王蕾[1] 肖鹏[1] 

机构地区：[1]吉林工业职业技术学院,吉林132013

出　　处：《离子交换与吸附》2013年第3期253-261,共9页Ion Exchange and Adsorption

摘　　要：采用共沉淀法合成了谷氨酸插层镁铝类水滑石(LDH),对所制备的试样进行了X-射线衍射和红外光谱表征,对LDH去除水中铅离子的能力进行了讨论,研究了吸附过程的吸附动力学和吸附等温线。结果表明,谷氨酸能嵌入镁铝水滑石的层间,该插层水滑石能有效吸附水中铅离子,吸附过程符合准二级动力学模型,吸附等温曲线可用Langmuir模型来描述,吸附量可达68.49mg/g。Glutamate intercalated Mg-A1 layered double hydroxide （LDH） was prepared by co-precipitation and characterized by XRD and FT-IR. It was shown that glutamate can intercalate into the interlayer space of Mg-A1 LDH. The glutamate intercalated Mg-A1 LDH as adsorbent can effectively remove Pb2＋ from the aqueous solution with the maximum adsorption capacity of 68.49mg/g. The adsorption of Pb2＋ on glutamate intercalated Mg-A1 LDH was fitted pseudo-second-order kinetics model and the isotherm can be well defined by Langmuir model.

关 键 词：水滑石 类水滑石化合物 谷氨酸 重金属离子 

分 类 号：O647[理学—物理化学]