中文摘要：

目的制备两种EDTA键合硅胶（SG-EDTA）并对其Cu^2＋吸附性能进行研究。方法采用均相法和异相法制备SGEDTA。结果均相法制备SG-EDTA的收率比异相法制备SG-EDTA高;SG-EDTA在p H2时对Cu^2＋表现出了最大吸附量;从动力学吸附曲线来看,异相法与均相法制备的SG-EDTA对铜离子的吸附行为无明显差异。SG-EDTA在吸附动力学机制方面属于液膜扩散且符合拟二级动力学吸附;热力学吸附过程可用Freundlich热力学模型描述。结论两种方法制备的SGEDTA吸附量分别为1.413、1.457 mmol·g^-1。吸附重金属离子后,均相法制备的EDTA键合硅胶较异相法制备的更易洗脱。

英文摘要：

OBJECTIVE To prepare two sort of diethylamine tetraethylammonium anhydride（ EDTA anhydride） bonded silica gels（ SG- EDTA） and to study the adsorption performance of these two materials. METHODS The homogeneous method and heterogenous method were applied to prepare SG- EDTA. RESULTS The homogeneous bonded silica had a higher productive yield. The static adsorbent showed the maximum adsorption apacity to Cu^2＋with p H2. According to the adsorption kinetic curve,the adsorption equilibrium of Cu^2＋on SG- EDTA prepared by homogeneous method and neterogenous method had no obvious differences between two methods.The fitted curve proved the adsorption kinetic was controlled by liquid film diffusion. Adsorption isotherms revealed that adsorption capacities could be well described by Freundlich isotherm model. EDTA bonded silica gel had shown in line with secondary kinetic adsorption. CONCLUSION SG- EDTA prepared by both methods had a good dynamic adsorption performance,and the amount of adsorption is 1. 413 mmol·g^-1and 1. 457 mmol·g^-1,respectively. After the adsorption of copper ion,the elution on SG- EDTA prepared by homogeneous method is easier than that by heterogeneous method.