| ADSORPTION OF 2,4-D ON MODIFIED HYPERCROSSLINKED POLYSTYRENE （NDA-99） AND XAD-4 RESIN |
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| 作者姓名： | Yu-pingQiu Jin-longChen Ai-minLi Quan-xingZhang Min-shengHuang |
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| 作者单位： | [1]StateKeyLaboratoryofPollutionControlandResourcesReuse,SchooloftheEnvironment,NanjingUniversity,Nanjing210093,China [2]DepartmentofEnvironmentalScience＆Technology,EastChinaNormalUniversity,Shanghai200062,China |
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| 摘 要： | The adsorption behavior of pesticide 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous solution has been investigated using a hypercrosslinked polystyrene adsorbent (NDA-99) modified by dimethylamine group as well as a nonionic macroporous adsorbent (XAD-4). The Langmuir and Freundlich isotherm models were employed to fit the experimental data to describe adsorption mechanism. It shows that NDA-99 resin exhibits an adsorption affinity for 2,4-D higher than XAD-4 resin owing to its exceptional micropore structure and the amine group of the hypercrosslinked matrix.Further studies indicate that the hydrogen bonding interaction and the stronger π-π conjugation play a significant role in the course of the adsorption of 2,4-D on NDA-99 resin, which is in agreement with the IR spectroscopic results and the △E values of HOMO (the highest occupied molecular orbit) of adsorbent and LUMO (the lowest unoccupied molecular orbit) of adsorbate calculated from the MINDO/3 model.
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| 关 键 词： | 2 4-D 吸附性能 超级交联树脂 微观孔结构 氢键 聚苯乙烯 XAD-4树脂 |
| 收稿时间： | 2004-08-05 |
| 修稿时间： | 2004-09-21 |
ADSORPTION OF 2,4-D ON MODIFIED HYPERCROSSLINKED POLYSTYRENE (NDA-99) AND XAD-4 RESIN |
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| Yu-pingQiu Jin-longChen Ai-minLi Quan-xingZhang Min-shengHuang.ADSORPTION OF 2,4-D ON MODIFIED HYPERCROSSLINKED POLYSTYRENE (NDA-99) AND XAD-4 RESIN[J].Chinese Journal of Polymer Science,2005,0(4):435-440. |
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| Authors: | Yu-ping Qiu Jin-long Chen Ai-min Li Quan-xing Zhang Min-sheng Huang |
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| Institution: | Department of Environmental Science & Technology, East China Normal University, Shanghai 200062, China |
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| Abstract: | The adsorption behavior of pesticide 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous solution has been investigated using a hypercrosslinked polystyrene adsorbent (NDA-99) modified by dimethylamine group as well as a nonionic macroporous adsorbent (XAD-4). The Langmuir and Freundlich isotherm models were employed to fit the experimental data to describe adsorption mechanism. It shows that NDA-99 resin exhibits an adsorption affinity for 2,4-D higher than XAD-4 resin owing to its exceptional micropore structure and the amine group of the hypercrosslinked matrix.Further studies indicate that the hydrogen bonding interaction and the stronger π-π conjugation play a significant role in the course of the adsorption of 2,4-D on NDA-99 resin, which is in agreement with the IR spectroscopic results and the AE values of HOMO (the highest occupied molecular orbit) of adsorbent and LUMO (the lowest unoccupied molecular orbit) of adsorbate calculated from the MINDO/3 model. |
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| Keywords: | 2 4-D Adsorption Hypercrosslinked resin Microporous structure Hydrogen bonding ADSORPTION POLYSTYRENE MODIFIED model LUMO molecular orbit spectroscopic results values HOMO conjugation play significant role course studies hydrogen bonding interaction micropore structure |
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