论文部分内容阅读
通过CTS/纳米Si O2吸附剂对低浓度稀土离子的吸附实验,研究了吸附剂的吸附-解吸性能。在吸附温度为25℃,p H=5,Gd3+、La3+和Y3+初始浓度分别为45mg/L、37.5mg/L和27.5mg/L,吸附剂加入量为40mg等条件下,CTS/纳米Si O2吸附剂对稀土离子Gd3+、La3+和Y3+的饱和吸附量分别为22.3mg/g、17.8mg/g和12.9mg/g。采用Langmuir模型对吸附平衡实验数据进行了线性模拟,并测定了吸附等温线。研究表明,CTS/纳米Si O2吸附剂对稀土离子有很强的吸附效果,吸附率高达98%,可用盐酸解吸回收稀土离子,并且吸附剂可再生利用。
Adsorption-desorption properties of adsorbents were studied by adsorption experiments of CTS / nano-Si O2 adsorbents on low concentration rare earth ions. Under the conditions of 25 ℃, p H = 5, initial concentrations of Gd3 +, La3 + and Y3 + were 45mg / L, 37.5mg / L and 27.5mg / L, respectively, Adsorption of rare earth ions Gd3 +, La3 + and Y3 + saturated adsorption capacity were 22.3mg / g, 17.8mg / g and 12.9mg / g. The Langmuir model was used to simulate the experimental data of adsorption equilibrium and the adsorption isotherms were determined. The results show that CTS / nano-Si O2 adsorbent has a strong adsorption effect on rare earth ions. The adsorption rate is as high as 98%. The rare earth ions can be desorbed by hydrochloric acid and the adsorbent can be reused.