无机吸附法降低稀土冶炼废水放射性研究

摘要放射性废物清洁解控水平的确定是实现放射性废物最小化管理的一项重要手段，提出更加符合安全清洁解控要求并能有效的降低稀土冶炼废水放射性的技术工艺是推进稀土工业进一步发展的关键。68928

本文探究了硅藻土和活性炭这两种吸附剂对降低稀土废水的放射性水平的有效操作方法。本实验用提纯后的硅藻土和酸洗改性后的活性炭对浓缩后的废水进行吸附，同时研究了吸附温度对硅藻土和活性炭直接吸附效果的影响。最终得出在温度为40℃、固液比为1(g):50(mL)，并不断搅拌的条件下可以最大程度的发挥出硅藻土对放射性废水的吸附性能，该条件下经硅藻土吸附后萃取废水的α放射性比活度减小为原来的81.4%，β放射性比活度减小为原来的89.1%；在温度为60℃、固液比为1(g):50(mL)，并不断搅拌的条件下可以最大程度的发挥出活性炭对放射性废水的吸附性能，在该条件下经活性炭吸附后萃取废水的α放射性比活度减小为原来的40.9%，β放射性比活度减小为原来的25.7%。

研究表明，通过直接利用硅藻土、活性炭这两种吸附剂对稀土冶炼废水进行放射性吸附，有望简化企业对萃取废水的皂化处理的传统工艺模式，成为更加符合安全清洁解控要求的技术。

毕业论文关键词清洁解控放射性废水硅藻土活性炭

毕业设计说明书外文摘要

Title Study on radioactive reduction technology for rare earth wastewater by using inorganic adsorbents

Abstract

Radioactive waste cleaning solution of control level is determined to realize, which is more in line with the clean and safe solution control requirements and can effectively reduce the radioactivity of rare earth smelting waste water technology is the key to promote the further development of rare earth industry an important tool for the management of radioactive waste minimization.

Direct wastewater concentrated on two this paper explores the diatomite and activated carbon adsorbent to reduce the rare-earth wastewater of radioactive level of effective operation method. The experiments with purified diatomite and acid modified activated carbon adsorption, and the adsorption temperature of diatomite and activated carbon adsorption effect. Finally comes to the conclusion that the temperature is 40 DEG C, solid to liquid ratio is 1 (g): 50 (ml), and keep stirring conditions can be the greatest degree of play of Diatomite on radioactive waste water adsorption performance. The conditions after diatomite adsorption extraction wastewater of alpha radioactivity decrease for original 81.4%, beta radioactivity decrease 89.1% of the original; at a temperature of 60 DEG C, solid to liquid ratio is 1 (g): 50 (ml), and keep stirring conditions can be the greatest degree of play activated carbon on radioactive waste water adsorption properties. Under the conditions after activated carbon adsorption waste water extraction of alpha radioactivity decreases 40.9% of the original, beta radioactivity decreased 25.7% of the original

Studies have shown that by using diatomite, activated carbon the two adsorbents of rare earth smelting wastewater for absorption of radioactivity, is expected to simplify the saponification of extraction wastewater treatment of traditional process model, become more in line with the technology of clean and safe solution control requirements.

Keywords Cleaning solution control Radioactive waste water Diatomite Activated carbon

1 绪论无机吸附法降低稀土冶炼废水放射性研究:http://www.youerw.com/wuli/lunwen_77631.html