【摘要】 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。更多还原

【Abstract】 The adsorption and desorption performance of CTS/nano-Si O2 for low concentration of rare earth ions was studied. The optimum conditions was as follows: adsorption temperature was 25℃, p H value was 5, initial mass concentration of gadolinium, lanthanum and yttrium was 45mg/L, 37.5mg/L and 27.5mg/L, respectively, and absorbent dosage was 40 mg. Under these conditions, the saturated adsorption capacity of gadolinium, lanthanum and yttrium was 22.3mg/g, 17.8mg/g and 12.9mg/g, respectively. Langmuir isotherm was used to describe the adsorption behavior of rare earth ions on CTS/nano-Si O2. Experimental results showed that CTS/nano-SiO 2 had strong interaction with rare earth ions with adsorption efficiency above 98%, and the rare earth ions absorbed could be desorbed with hydrochloric acid for recycling.更多还原