脲醛树脂对Th4+, Ag+，Co2+的吸附对比研究
关键词 脲醛树脂 Th4+ Ag+ Co2+ 吸附
毕业论文设计说明书外文摘要
Title Comparative adsorption study of thorium, silver and cobalt by urea-formaldehyde resin
Abstract
This paper mainly studied the synthesis of urea formaldehyde resin and its structure by infrared spectroscopy, scanning electron microscopy. F/U ratio (formaldehyde to urea), pH and reaction time are main influence factors. Comparative study of adsorption properties of silver,thorium and cobalt on urea formaldehyde resin in water were finished preliminary. The results show that the resin with F/U molar ratio of 0.8 containing more -C=O and -NH groups. The optimum adsorption initial pH for Th4+ was 5. While for Ag+ and Co2+, the optimum initial pH was 4. Adsorption capacity of urea formaldehyde resin on thorium, silver, cobalt were 18.68mg/g, 16.24mg/g, 12.24mg/g, respectively. When the adsorption reaction reached equilibrium, Th4+, Ag+, Co2+ removal rate by urea formaldehyde resin did not significantly increase with the reaction time and the dosage of urea formaldehyde resin increased.
Keywords urea-formaldehyde resin Th4+ Ag+ Co2+ adsorption
目 次
1 绪论 1
1.1 放射性离子的危害 1
1.2 去除方法研究 1
1.2.1 钍的去除方法介绍 1
1.2.2 银的去除方法介绍 2
1.2.3 钴的去除方法介绍 3
1.3 脲醛树脂吸附金属离子机理探究 3
1.4 选题意义 5
1.5 主要研究内容 5
2 实验部分 6
2.1 实验试剂及使用仪器 6
2.1.1 试剂 6
2.1.2 仪器 6
2.2 树脂合成 6
2.3 树脂理化结构表征 7
2.3.1 红外光谱分析（FT-IR） 7
2.3.2 扫描电镜分析（SEM） 7
2.3.3 固含量测定 8
2.4 水体中Th4+，Ag+，Co2+的检测方法 8
2.4.1 水体中Th4+的检测方法 8
2.4.2 水体中Ag+的检测方法 8
2.4.3 水体中Co2+的检测方法 8
2.5 离子吸附实验 8
2.5.1 树脂吸附Th4+实验 8
2.5.2 树脂吸附Ag+实验 9
2.5.3 树脂吸附Co2+实验 10
3 结果与讨论 10
3.1 脲醛树脂表征 10
3.1.1 树脂红外谱图 10
3.1.2 树脂扫描电镜图 11
3.1.3 树脂固含量 12
3.2 吸附标准曲线 12
3.2.1 Th4+标准曲线 12
3.2.2 Ag+标准曲线 13
3.2.3 Co2+标准曲线 13