UF树脂在环境水体放射性本底调查中的应用

摘要随着人口增长和技术进步，人类赖以生存的水资源受到了放射性污染。水体放射性环境的管理和监测是水环境保护的组成部分。 UF 树脂可对水中的放射性离子进行浓缩与富集，可应用于放射性离子的吸附、分离、富集及环境保护等方面。本文采用碱 - 酸 - 碱合成工艺合成 UF 树脂，利用硝酸钍配制模拟水样，并利用合成的 UF 树脂对其吸附性能进行研究。以尿素与甲醛为原料，在催化剂作用下合成 UF 树脂。通过傅里叶变换红外光谱仪和热重分析仪对树脂的结构和热性能进行了表征，热分析结果表明，该树脂具有较好的均匀性、热稳定性。利用硝酸钍配制模拟水样，探讨了 UF 树脂对 Th 4+的吸附性能。通过对树脂用量、吸附时间、溶液 pH 值的探讨。实验结果表明，在常温常压下，钍的含量约为0.221mmol/L 时，树脂最佳用量为 2.5 g ，吸附时间为 10h ，溶液 pH 为 5 时 ,Th 4+在树脂上很容易吸附。59984
毕业论文关键词： UF 树脂放射性离子吸附性能树脂 Th4+离子
Title Title Title Title Application of UF Resin in the radioactive backgroundInvestigation of water body in the environmentAbstract
Abstract Abstract AbstractWith population growth and technological progress ,w ater resources for humansurvival exposed to radioactive contamination . Radioactive waterenvironmental management and monitoring is an integral part of waterprotection . UF resins in water can concentration and enrichmentradioactiveion ,c an be applied to radioactive ion adsorption, separation, enrichmentand environmental protection.In this paper ,use alkali - acid - alkalisynthesis synthetic UF resins,The use of thorium nitrate simulated watersample preparation,And using UF resin synthesized to study its adsorptionproperties.First, urea and formaldehyde as raw materials in the catalystsynthesis UF resins.Fourier transform infrared spectroscopy and thermalgravimetric analysis on the structure and thermal properties of the resinwere characterized . Thermal analysis showed that the resin has gooduniformity, thermal stability.Then, using thorium nitrate simulated watersample preparation are discussed Th4 +UF resin adsorption properties.Throughthe amount of resin, adsorption time, pH values discussed.Experimentalresults show that, at room temperature under atmospheric pressure thoriumcontent of approximately 0.221mmol / L, the optimum amount of the resin is2.5g, adsorption time of is 10h, the pH is 5, Th4 +is easily adsorbed on theresin.
Key words : UF resins Radioactive Ion Adsorption Resin Th4 +ion

1文献综述..1

1.1环境水体放射性概况.1

1.1.1温泉水....2

1.1.2环境放射性水体处理及检测方法3

1.1.3水样的测量原理及计算方法...4

1.2脲醛树脂概况5

1.2.1树脂的性能指标及表征手段...6

1.2.2脲醛树脂的应用及发展前景...7

1.3本论文的研究内容及意义...9

1.3.1研究内容9

1.3.2研究意义9

2脲醛树脂的合成..10

2.1脲醛树脂的合成原理....10

2.2实验方法....11

2.2.1试剂、仪器及合成..11

2.2.2脲醛树脂的傅立叶变换红外光谱(FT一IR)11

2.2.3SEM..12

2.2.4DSC..12

2．3结果与讨论...12

2.3.1脲醛树脂的FT-IR谱图....12

2.3.2SEM结果...13

2.3.3DSC结果...13

3脲醛树脂对硝酸钍模拟环境水的吸附研究...14

3.1试剂与仪器14

3.2实验方法....14

3.2.1硝酸钍母液的配制..14

3.2.2配制模拟水样15

3.2.3模拟水样浓度对UF树脂吸附的影响.15

3.2.4UF树脂用量对模拟水样的吸附研究..15

3.2.5溶液pH对脲醛树脂吸附模拟水样的影响...15

UF树脂在环境水体放射性本底调查中的应用:http://www.youerw.com/shengwu/lunwen_65326.html