摘要：通过共沉淀法合成乙二胺四乙酸根(EDTA^4-)插层的镁-铝水滑石(MgAl-EDTA-LDH),并采用X射线衍射和红外光谱对其结构和化学组成进行表征,研究MgAl-EDTA-LDH对水溶液中铜离子的去除能力。结果表明,乙二胺四乙酸根已插入镁-铝水滑石的层间,且插层水滑石能有效吸附水溶液中的铜离子,在2 h时吸附效率可达93.05%。

关键词：重金属废水；插层；水滑石；铜离子

Abstract：The EDTA^4- intercalated Mg-Al layered double hydroxide(MgAl-E DTA-LDH) was prepared by the method of co-precipitation.The structure and chemical compositions of Mg Al-EDTA-LDH were characterized by XRD and IR. The removal of copper ion in aqueous solution by MgAl-EDTA-LDH was researched. The results show that EDTA^4- is intercalated into the interlayer spaces of Mg-Al layered double hydroxide.The Mg Al-EDTA-LDH can remove Cu²⁺ from the aqueous solution effectively with the maximum adsorption efficiency of 93.05% at 2 h.

Keywords: heavy metal waste water；intercalation；layered double hydroxide；copper ion