| 黄腐酸基Cd2+离子印迹聚合物的吸附性能测试 |
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| 引用本文： | 尚宏周,赵敬东,何俊男,孙晓然.黄腐酸基Cd2+离子印迹聚合物的吸附性能测试[J].化工学报,2017,68(5):1940-1945. |
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| 作者姓名： | 尚宏周 赵敬东 何俊男 孙晓然 |
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| 作者单位： | 华北理工大学化学工程学院, 河北 唐山 063210 |
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| 基金项目： | 河北省自然科学基金项目（B2014209200）。 |
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| 摘 要： | 以改性黄腐酸为功能单体，反相悬浮聚合法制备了Cd2+离子印迹聚合物，并研究其吸附性能。动力学模型表明，黄腐酸基Cd2+离子印迹聚合物对Cd2+的吸附符合准二级动力学吸附模型，相关系数达到0.9977；热力学研究发现，黄腐酸基Cd2+离子印迹聚合物吸附重金属离子的形式为单分子层表面吸附，与Langmuir等温吸附模型相符；竞争吸附实验显示，竞争离子Pb2+、Cr3+存在时，Cd2+/Pb2+、Cd2+/Cr3+的相对选择性系数分别为4.32、13.47，说明MFA-IIP对模板离子拥有较强的选择识别性能，竞争离子化合价不同，选择识别性更加显著。
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| 关 键 词： | 离子印迹 改性黄腐酸 吸附剂 动力学 热力学 |
| 收稿时间： | 2016-08-18 |
| 修稿时间： | 2017-02-17 |
Absorption properties of Cd2+ ion imprinted poly(fulvic acid) |
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| SHANG Hongzhou,ZHAO Jingdong,HE Junnan,SUN Xiaoran.Absorption properties of Cd2+ ion imprinted poly(fulvic acid)[J].Journal of Chemical Industry and Engineering(China),2017,68(5):1940-1945. |
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| Authors: | SHANG Hongzhou ZHAO Jingdong HE Junnan SUN Xiaoran |
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| Affiliation: | College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China |
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| Abstract: | Cd2+ ion imprinted polymer (MFA-IIP) was synthesized by inverse suspension copolymerization of modified fulvic acid monomer. Adsorption study showed that adsorption kinetics of MFA-IIP to Cd2+ is in accordance with pseudo-second-order kinetic model with correlation coefficient of 0.9977. The adsorption of heavy metal ions on MFA-IIP polymer thermodynamically follows single-molecule surface Langmuir adsorption model. In presence of competitive Pb2+ and Cr3+ ions, the polymer exhibited strong selection and recognition to template ion with relative selectivity coefficient of Cd2+/Pb2+ and Cd2+/Cr3+ at 4.32 and 13.47, respectively. When other metal ions with different valences existed in aqueous solution, selective recognition of MFA-IIP polymer to Cd2+ would be much more obvious. |
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| Keywords: | ion imprinted modified fulvic acid adsorbents kinetics thermodynamics |
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