纳米二氧化钛吸附洛克沙胂的动力学研究

The Dynamic Study of Nano Titanium Dioxide Adsorption on Roxarsone

作为被普遍用于家禽牲畜养殖业的洛克沙胂,会随动物排泄物并且维持原样的排入到环境中.砷会对环境造成非常严重的危害污染并且具有很强的转化迁移性.通过纳米二氧化钛吸附洛克沙胂的实验研究,得到了纳米二氧化钛吸附洛克沙胂的量和时间成正比,吸附时间越长剩余洛克沙胂含量越低,其二级动力学拟合优于一级动力学拟合;温度越来越高,纳米二氧化钛对洛克沙胂的吸附饱和量也越来越高,这说明温度越高对吸附越有利,吸附过程更符合Langmuir等温线模型.

Roxarsone is widely used in poultry and livestock farming,and will be discharged into the environment with animal excrement. Arsenic will cause very serious harmful pollution to the environment and has a strong transformation and migration. In this paper,nano titanium dioxide adsorbed roxarsone was studied. The amount and time of the adsorption of roxarsone by nano titanium dioxide were proportional,and the longer the adsorption time was, the lower the content of roxarsone was. Second-order kinetic fit will be more appropriate. The higher the temperature, the higher the adsorption capacity of nano-titanium dioxide to roxarsone,which indicates that the higher the temperature was, the better the adsorption was. The adsorption process is more consistent with the Langmuir isotherm model.