天然纤维素纤维改性及其对水中砷的吸附

 以天然纤维素纤维作为基体材料，通过Ce4+引发的自由基聚合，在其表面接枝聚甲基丙烯酸二甲胺基乙酯，合成了阴离子吸附剂cellulose-g-PDMAEMA（纤维素接枝聚甲基丙烯酸二甲胺基乙酯），用于水中砷的去除。采用场发射扫描电镜（FE-SEM）、傅里叶变换红外光谱（FT-IR）及元素分析对材料进行表征。并且分别用静态吸附实验和动态吸附实验研究材料的吸附性能，结果表明，该阴离子吸附剂可以有效地吸附水中三价砷和五价砷。

Modification of Natural Cellulose Fibers for Arsenic Adsorption from Water

In this study, the natural cellulose fibers are chosen as template and the anion adsorbent cellulose-g-PDMAEMA is synthesized for arsenic removal. The cellulose fibers were surface modified by graft-polymerization of(N,N-dimethyl aminoethyl methacrylate) (DMAEMA) initiated by Ce4+. The adsorbent was characterized by Field Emission Scanning Electron Microscopy (FE-SEM), Fourier Transform Infrared Spectroscopy(FT-IR) and elemental analyzer. And the adsorption behavior was evaluated by both batch and column experiments. The results indicate that the adsorbent has a high efficiency in the removal of arsenite and arsenate from aqueous solutions.