Preparation of Strong Alkali Anion Exchange Fiber and its Application in Nitrate Adsorption

Abstract:

Two kinds of new type of strong alkali anion exchange fibers (PP-g-Vam-ETA and PP-g-Vam-DAC) have been prepared non-toxically and easily via the quaternary reaction of PP-g-Vam matrix (a kind of weakly basic anion-exchange fiber, produced by our Lab.) with ETA (2,3-epoxypropyl trimethyl ammonium chloride) and the grafting reaction of PP-g-Vam matrix with DAC (acyrloxyethyl trimethylammonium chloride). The exchange capacities of PP-g-Vam-ETA and PP-g-Vam-DAC are 2.1018mmol/g (dry fiber) and 2.0217mmol/g (dry fiber) resp. Its adsorption and desorption performances for NO₃^- have been studied. The adsorption isotherm curve has been well described by Langmuir equation. The fibers have selective adsorption property for NO₃^-. The static adsorption capacity of PP-g-Vam-ETA is 11.24 mg/g (dry fiber at pH=3); and PP-g-Vam-DAC is 9.79 mg/g (dry fiber at pH=4). The static desorption rate of the two fibers are above 97%.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 790-796
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.790
• Online since: May 2012
• Authors: Rui Zhi Li, Yu Wang, Hua Ming Xiao, Zheng Pu Zhang
• Keywords: Nitrate Adsorption, PP-G-Vam Matrix, Strong Alkali Anion-Exchange Fiber

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