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Adsorption of chromium (VI) from aqueous solutions by cellulose modified with β-CD and quaternary ammonium groups
- Zhou, Yanmei, Jin, Qiang, Zhu, Tianwei, Akama, Yoshifumi
- Journal of hazardous materials 2011 v.187 no.1-3 pp. 303-310
- adsorbents, adsorption, ammonium nitrate, aqueous solutions, cellulose, chromium, epoxides, sorption isotherms
- Cellulose powder was grafted with the vinyl monomer glycidyl methacrylate using ceric ammonium nitrate as initiator and was further derived with β-CD and quaternary ammonium groups to build Cell-g-GMA-β-CDN⁺ adsorbent. Epoxy cellulose was made up of Cell-g-GMA and Cell-hydro-g-GMA, and was found to contain 3.71mmolg⁻¹ epoxy groups. The adsorption process of the modified cellulose was described by the Langmuir model of adsorption well, and the maximum adsorption capacity of chromium (VI) reached 61.05mgg⁻¹. The adsorption–desorption tests of β-CDN⁺-type cellulose derivatives exhibited that the reproducibility of the adsorbent was well and the adsorbent could be reused five times at least.