Preparation of methacrylic acid-grafted chitin using cerium (IV) ion and its application in adsorbing paraquat
Autor: | Tzu-Ta Wang, Wen-Feng Hsiao, Ting-Chung Pan, Wen-Churng Lin, Yu-Miao Huang, Shih-Tong Hsu, Cheng-Chieh Lee |
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Rok vydání: | 2012 |
Předmět: |
Langmuir
Materials science Polymers and Plastics Inorganic chemistry chemistry.chemical_element General Chemistry Surfaces Coatings and Films Cerium chemistry.chemical_compound Differential scanning calorimetry Adsorption chemistry Paraquat Methacrylic acid Materials Chemistry medicine Freundlich equation Activated carbon medicine.drug |
Zdroj: | Journal of Applied Polymer Science. 127:760-764 |
ISSN: | 0021-8995 |
DOI: | 10.1002/app.37771 |
Popis: | Chitin-grafted-poly(methacrylic acid) (chi-g-PMAA) was synthesized and characterized as an adsorbent of paraquat. Chi-g-PMAA copolymers were prepared using various concentrations of ammonium cerium(IV) nitrate (Ce+4) to determine the optimal concentration of Ce+4. Grafting was verified by differential scanning calorimeter thermograms, FTIR, and solid-state 13C-NMR spectra. A representative chi-g-PMAA copolymer was neutralized to a sodium salt (chi-g-PMANa) and used to adsorb paraquat. The adsorption equilibrium data are strongly related to both the Langmuir and the Freundlich isotherms. The maximal adsorption capacity is 147.0 mg/g-adsorbent. This value exceeds those of Fuller's earth and activated carbon, which are the most common binding agents that are currently used for paraquat. The results suggest that chi-g-PMANa has potential as a paraquat adsorbent. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
Databáze: | OpenAIRE |
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