| 高容量亚胺基二乙酸型螯合树脂的制备及吸附性能 |
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| 引用本文： | 董佳斌,吴建波,杨静,宋玮,戴小军,冶正得,龚波林. 高容量亚胺基二乙酸型螯合树脂的制备及吸附性能[J]. 高等学校化学学报, 2013, 34(3): 714-719. DOI: 10.7503/cjcu20120616 |
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| 作者姓名： | 董佳斌 吴建波 杨静 宋玮 戴小军 冶正得 龚波林 |
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| 作者单位： | 宁夏大学能源化工重点实验室, 宁夏天然产物工程技术研究中心, 银川 750021 |
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| 基金项目： | 国家自然科学基金(批准号:21065008);宁夏大学科研基金(批准号:NDZR10-42);宁夏大学自然基金(批准号:ZR1103)资助 |
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| 摘 要： | 以甲基丙烯酸缩水甘油酯(GMA)为单体, 氯甲基化的交联聚苯乙烯树脂(CMCPS)为大分子引发剂, CuBr/2,2'-联吡啶(Bpy)为催化剂, 采用表面引发原子转移自由基聚合(SI-ATRP)技术, 使甲基丙烯酸缩水甘油酯聚合在CMCPS树脂表面, 制得了环氧化聚合物. 将该聚合物与亚胺基二乙酸(IDA)反应, 制备了高容量亚胺基二乙酸型螯合树脂(IDA-PGMA-CMCPS), 用元素分析对其进行了表征. 考察了螯合树脂对Cu2+的吸附性能及动力学和热力学参数. 该螯合树脂表面IDA接枝密度达8.15 mg/m2. 研究结果表明, 树脂对Cu2+的吸附量随离子浓度和温度的升高而增加, 当pH值为2.2时, 对Cu2+离子的吸附效果最佳. 树脂的静态饱和吸附容量为1339.66 mg/g, Langmuir和Freundlich方程均呈现良好的拟合度. 通过热力学平衡方程计算ΔG<0, ΔH=270.60 kJ/mol, ΔS>0, 表明该吸附过程是自发、 吸热、 熵增加的过程. 动力学研究结果表明, 准二级动力学方程能较好拟合动力学实验结果, 该过程符合准二级动力学模型.
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| 关 键 词： | 亚胺基二乙酸型螯合树脂 表面引发原子转移自由基聚合法 吸附性能 动力学 热力学 |
| 收稿时间： | 2012-06-29 |
Preparation of High-capacity IDA Chelating Resin and Its Adsorption Properties |
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| DONG Jia-Bin , WU Jian-Bo , YANG Jing , SONG Wei , DAI Xiao-Jun , YE Zheng-De , GONG Bo-Lin. Preparation of High-capacity IDA Chelating Resin and Its Adsorption Properties[J]. Chemical Research In Chinese Universities, 2013, 34(3): 714-719. DOI: 10.7503/cjcu20120616 |
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| Authors: | DONG Jia-Bin WU Jian-Bo YANG Jing SONG Wei DAI Xiao-Jun YE Zheng-De GONG Bo-Lin |
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| Affiliation: | Key Laboratory of Energy & Chemical Engineering, Ningxia University, Natural Product Engineering Research Center, Yinchuan 750021, China |
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| Abstract: | A new high-capacity iminodiacetic acid(IDA) chelating resin was synthesized via surface-initiated atom transfer radical polymerization(SI-ATRP) method. Glycidyl methacrylate(GMA) was grafted onto the surface of the chloromethyl polystyrene resin by SI-ATRP using the organic metal compound formed in the CuBr/2,2'-bipyridine(Bpy) system as catalyst at room temperature. The IDA chelating resin was synthesized by grafting IDA on the surface of polyglycidyl methacrylate(PGMA) modified polystyrene resin. The chelating resin was characterized by means of elementary analysis, and evaluated in details to determine its adsorption properties and parameters of kinetics and the thermodynamics. The amount of IDA on the surface of polystyrene resin was calculated to be 8.15 mg/m2. Adsorption capacity of copper(Ⅱ) increased with increasing initial metal ion concentration and temperature, and its highest adsorption capacity was 1339.66 mg/g at pH=2.2. The experimental results showed that the equilibrium adsorption data fitted well to both Langmuir and Freundlich isotherms. The thermodynamic equilibrium functions were also determined. ΔG<0, ΔH=270.60 kJ/mol, ΔS>0, so the adsorption was spontaneous, endothermic and entropy increasing. The kinetic experimental data were correlated with second-order kinetic model. |
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| Keywords: | Iminodiacetic acid(IDA) chelating resin Surface-initiated atom transfer radical polymerization method Adsorption property Kinetics Thermodynamics |
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