Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Jinming Street, Kaifeng, Henan 475004, PR China.
J Hazard Mater. 2011 Mar 15;187(1-3):303-10. doi: 10.1016/j.jhazmat.2011.01.025. Epub 2011 Jan 14.
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 3.71 mmol g(-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 61.05 mg g(-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.
纤维素粉末在硝酸铈铵引发剂的作用下与乙烯基单体甲基丙烯酰氧乙基缩水甘油醚接枝，进一步衍生出β-环糊精和季铵基团，制得 Cell-g-GMA-β-CDN(+)吸附剂。环氧纤维素由 Cell-g-GMA 和 Cell-hydro-g-GMA 组成，含有 3.71mmol/g 的环氧基团。改性纤维素的吸附过程很好地符合Langmuir 吸附模型，对六价铬的最大吸附容量达到 61.05mg/g。β-CDN(+)-型纤维素衍生物的吸附-解吸试验表明，该吸附剂的重现性良好，至少可以重复使用五次。
