摘要本课题选取微孔沸石ZSM-5、有序介孔材料SBA-15以及有序大孔材料MOSF作为吸附剂，研究了其对稀土矿酸溶渣浸滤液的吸附性能，以及相应的总放射性吸附实验的研究。本论文考察了在相同吸附条件下，ZSM-5、SBA-15、MOSF对浸滤液中稀土离子吸附能力的差异，并且对这三种材料吸附放射性物质的能力进行了讨论。实验结果表明：对浸滤液中稀土离子以及钍离子的总吸附能力依次为，MOSF > SBA-15 > ZSM-5。经低本底α、β计数测量，吸附后的三种多孔材料的总α放射性强弱顺序为：SBA-15 > ZSM-5 > MOSF，总β放射性强弱顺序为：ZSM-5 > SBA-15 > MOSF。这可能与钍及其衰变子体在三种多孔材料的表面或体相分布有关。64763

毕业论文关键词 稀土矿浸滤液  吸附  放射性水平

Title  Adsorption Performance of Rare-Earth Ore Leaching Solution on Several Porous Materials 

Abstract：

Microporous zeolite ZSM-5, ordered mesoporous material SBA-15 and ordered macroporous material MOSF were used as adsorbents in this thesis. Their adsorption performance of rare-earth ore leaching solution, and the corresponding total radioactivity of adsorbed porous materials were investigated. Under the same adsorption condition, including pH, concentration, temperature, adsorbent dosage, the measurement of the absorption capacity of these three porous materials and radioactivity of nuclei adsorbed on these three porous materials were carried out. The  results indicated that, the sequence of total adsorption capacity of rare earth ions and Thorium ion was, MOSF > SBA-15 > ZSM-5. The measurement of low-background α/β counting showed that, the sequence of the total α radioactivity on the adsorbed porous matierlas was, SBA-15 > ZSM-5 > MOSF, the sequence of the total β radioactivity on the adsorbed porous materials was, ZSM-5 > SBA-15 > MOSF. These resulted could be related to the distribution of Thorium and its decay daughters on the surface or in the bulk of these three porous adsorbents.

Key words  rare earth ore leaching filtrate   adsorption  levels of radioactivity

目   次

1、绪论 1

1.1稀土元素 1

1.2稀土元素分析方法 1

1.3放射性废液 2

1.4吸附剂及吸附法处理污水 3

2、实验部分 5

2.1实验材料及试剂 5

2.2实验仪器 5

2.3稀土标准溶液的制备： 6

2.4显色剂——偶氮胂Ⅲ的配制 7

2.5测定波长的选择 8

2.6标准曲线的绘制 9

2.7多孔材料模板去除 9

2.8稀土矿浸滤液的制备 10

2.9计算方法 11

2.10吸附实验 11

3、实验结果和分析 12

3.1吸光度测量结果 12

3.1.1稀土矿浸滤液浓度 12

3.1.2吸附后溶液稀土离子浓度 12

3.2 改变初始浓度 15

3.2.1 稀土矿浸滤液吸光度以及浓度