Adsorption mechanism of copper ions in aqueous solution by chitosan–carboxymethyl starch composites |
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| Authors: | Liang Chen HongYing Hao WanTing Zhang Ziqiang Shao |
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| Affiliation: | 1. University of Science and Technology Beijing, Beijing, 100083 China;2. Beijing Institute of Technology, Beijing Engineering Research Center of Cellulose and Its Derivatives, Beijing, 100081 China |
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| Abstract: | Based on the structural characteristics of chitosan (CTS) and carboxymethyl starch (CMS)， CTS–CMS composites were prepared by crosslinking. The composites had a plurality of reactive functional groups such as NH2, NH3+, COOH, and OH and are applied to the adsorption of Cu2+ in aqueous solution. The adsorption capacity and stability in acidic solution of the composites were preferable to that of raw material. The effects of temperature, contact time, initial concentration, and pH on the adsorption of Cu2+ were investigated. Infrared spectroscopy, scanning electron microscope–energy dispersive spectrometer, X-ray diffraction, and X-ray photoelectron spectroscopy were used to explore the adsorption mechanism. The experiment showed that chemisorption and physisorption coexisted in the adsorption process. It is promising to apply this adsorbent to remove the metal ions in wastewater. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48636. |
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