Selective adsorption of anionic dyes from aqueous solution by a novel β-cyclodextrin-based polymer
| Autor: | Wei Hai, Xiao-Lin Xie, Hong-Liu Jiang, Meng-Ya Xu, Fu-An He, Ze-Wu Xie |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution 010405 organic chemistry Organic Chemistry Cationic polymerization Polymer 010402 general chemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Congo red Inorganic Chemistry Contact angle chemistry.chemical_compound chemistry Selective adsorption Zeta potential Fourier transform infrared spectroscopy Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Molecular Structure. 1203:127373 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2019.127373 |
| Popis: | β-cyclodextrin (β-CD) was firstly crosslinked by tetrafluoroterephthalonitrile and then modified by ethanolamine (EA) to form a novel β-cyclodextrin-based polymer (EA-CDP). The microstructure and the properties of the EA-CDP were characterized by SEM, MIP, 13C NMR, FTIR, water contact angle measurement, zeta potential measurement, and TGA. The resultant EA-CDP could effectively select the anionicmethyl orange (MO) dye from the mixed-dye aqueous solution of MO and cationic methylene blue (MB) dye. The absorption capacity of the EA-CDP for anionic dyes including MO and Congo red (CR) increased with the decreasing pH value. The pseudo-second-order kinetic was more ideal to describe the absorption behavior of EA-CDP for MO and CR than the pseudo-first-order model. According to the fitting result of the Langmuir equation, the maximum absorption capacity of the EA-CDP for MO and CR reached as high as 602 mg/g and 1085 mg/g, respectively. Such a high absorption capacity could be ascribed to the triple absorption effects of the EA-CDP for anionic dyes including porous network capture, inclusion complextion, and electrostatic attraction. |
| Databáze: | OpenAIRE |
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