Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent
A polyfunctional hypercrosslinked polymeric adsorbent, LA-8, was synthesized and characterized. It was first used to investigate the adsorption properties of 1-amino-2-naphthol-4-sulphonic acid (1,2,4-acid), including the corresponding adsorption isotherms, thermodynamics and binary competitive adso...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2004-02-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361704323150962 |
| _version_ | 1797283501882474496 |
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| author | Liu Fuqiang Chen Jinlong Li Aimin Fei Zhenghao Ge Junjie Zhang Quanxing |
| author_facet | Liu Fuqiang Chen Jinlong Li Aimin Fei Zhenghao Ge Junjie Zhang Quanxing |
| author_sort | Liu Fuqiang |
| collection | DOAJ |
| description | A polyfunctional hypercrosslinked polymeric adsorbent, LA-8, was synthesized and characterized. It was first used to investigate the adsorption properties of 1-amino-2-naphthol-4-sulphonic acid (1,2,4-acid), including the corresponding adsorption isotherms, thermodynamics and binary competitive adsorption with 2-naphthol. The Freundlich model gave good fits to both the single and binary adsorption isotherms, indicating an endothermic and favourable adsorption process. The positive value of ΔH 0 for the single solute system was in the range of 30–60 kJ/mol showing the existence of integrated processes involving chemical interaction. The values of ΔG 0 demonstrated the spontaneous nature of the adsorption process while the value of ΔS 0 showed increased randomness at the solid–solution interface, thereby indicating the presence of stoichiometric displacement. Both ΔH 0 and ΔS 0 appeared to vary linearly with increased solid loading, q e . Pre-adsorbed 2-naphthol molecules supplied another adsorption site for 1,2,4-acid, despite the existence of an antagonistic interaction with 2-naphthol. In simultaneous processes, the mechanism for 1,2,4-acid adsorption probably mainly involved van der Waals forces and hydrogen-bonding interaction. Furthermore, the adsorption of a greater amount of 2-naphthol onto the solid phase demonstrated the occurrence of interaction between the tested binary solutes. It was concluded that direct competition for adsorption sites was the dominant competitive mechanism. |
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| id | doaj.art-fa8599c8667c4deda5d14c09c4a6b769 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:32:33Z |
| publishDate | 2004-02-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-fa8599c8667c4deda5d14c09c4a6b7692024-03-02T17:50:10ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382004-02-012210.1260/026361704323150962Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric AdsorbentLiu FuqiangChen JinlongLi AiminFei ZhenghaoGe JunjieZhang QuanxingA polyfunctional hypercrosslinked polymeric adsorbent, LA-8, was synthesized and characterized. It was first used to investigate the adsorption properties of 1-amino-2-naphthol-4-sulphonic acid (1,2,4-acid), including the corresponding adsorption isotherms, thermodynamics and binary competitive adsorption with 2-naphthol. The Freundlich model gave good fits to both the single and binary adsorption isotherms, indicating an endothermic and favourable adsorption process. The positive value of ΔH 0 for the single solute system was in the range of 30–60 kJ/mol showing the existence of integrated processes involving chemical interaction. The values of ΔG 0 demonstrated the spontaneous nature of the adsorption process while the value of ΔS 0 showed increased randomness at the solid–solution interface, thereby indicating the presence of stoichiometric displacement. Both ΔH 0 and ΔS 0 appeared to vary linearly with increased solid loading, q e . Pre-adsorbed 2-naphthol molecules supplied another adsorption site for 1,2,4-acid, despite the existence of an antagonistic interaction with 2-naphthol. In simultaneous processes, the mechanism for 1,2,4-acid adsorption probably mainly involved van der Waals forces and hydrogen-bonding interaction. Furthermore, the adsorption of a greater amount of 2-naphthol onto the solid phase demonstrated the occurrence of interaction between the tested binary solutes. It was concluded that direct competition for adsorption sites was the dominant competitive mechanism.https://doi.org/10.1260/026361704323150962 |
| spellingShingle | Liu Fuqiang Chen Jinlong Li Aimin Fei Zhenghao Ge Junjie Zhang Quanxing Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent Adsorption Science & Technology |
| title | Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent |
| title_full | Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent |
| title_fullStr | Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent |
| title_full_unstemmed | Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent |
| title_short | Equilibrium Adsorption of Single Component and Binary Mixtures of Aromatic Compounds onto a Polyfunctional Hypercrosslinked Polymeric Adsorbent |
| title_sort | equilibrium adsorption of single component and binary mixtures of aromatic compounds onto a polyfunctional hypercrosslinked polymeric adsorbent |
| url | https://doi.org/10.1260/026361704323150962 |
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