纳米氧化铝对Cr^6+的吸附研究

Study on the Adsorption of Cr^6+ by Nano-alumina

通过改变溶液的pH、纳米氧化铝加入量和超声波振荡时间等因素研究了纳米氧化铝对Cr6+的吸附作用,利用紫外-可见分光光度计测定了吸附后剩余的Cr6+的含量,得出了最佳的吸附条件。Cr6+溶液浓度在0.1000~1.000 mg/L范围成良好的线性关系,线性关系可以表示为A=0.7236c+0.0944,线性相关系数为r=0.9977,溶液的pH为6,每10 mg/LCr6+溶液中投入纳米氧化铝0.4~0.5 g,吸附效果最好。

The adsorption of nano-alumina on Cr6+was studied by changing the pH of solution and the quality of nano-alumina.The content of Cr6+after adsorption was determined by using the uv-visible spectrophotometry.The best adsorption conditions were obtained.The concentration of Cr6+solution was in the range of 0.1000~1.000 mg/L,which showed a good linear relationship.It could be expressed as A=0.7236 c+0.0944 and the linear correlation coefficient was r=0.9977.The adsorption effect was the best when the pH of the solution was 6,and 0.4-0.5 g of nano-alumina was put into 10 mg/L Cr6+solution.