活性炭负载纳米二氧化钛对水体中砷的去除

Removal of arsenic from water by nano titanium dioxide doped with activated carbon

采用批处理吸附实验,研究了颗粒活性炭和粉末活性炭负载纳米二氧化钛对水体中砷的去除效果及其初步机理。X射线衍射表征两种活性炭负载纳米二氧化钛后饱和吸附As(Ⅴ)和As(Ⅲ)前后的晶体结构图谱表明,其对砷的吸附属于表面吸附。结果说明,活性炭负载纳米二氧化钛便于纳米材料的回收,是发挥纳米二氧化钛除砷效果的重要措施。

By laboratory batch experiments, the effect of titanium dioxide doped with granular and powdered activat- ed carbon on the removal of As （ V ） and As （ Ⅲ ） from water and its preliminary mechanism have been studied. The X-ray diffraction （XRD） characterization of the crystal structures of titanium dioxide nanometer-doped granular and powdered activated carbon before and after saturating and adsorbing As （ V ） and As （Ⅲ ） indicates that the adsorp- tion of arsenic is a kind of surface adsorption. The results shows that the loading of nanometer titanium dioxide in ac- tivated carbon is convenient for recovering nano materials, and is an important measure to give full play to the effec- tiveness of nano titanium dioxide on the removal of arsenic from water.