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金属矿山 ›› 2012, Vol. 41 ›› Issue (04): 148-151.

• 安全与环保 • 上一篇    下一篇

斜发沸石处理模拟含铯放射性废水研究

刘爱平1,2,刘岁海1,汪惠2   

  1. 1.西南科技大学环境与资源学院;2.固体废物处理与资源化省部共建教育部重点试验室
  • 出版日期:2012-04-23 发布日期:2012-04-26
  • 基金资助:

    * 国家自然科学基金项目(编号:50804039)。

Treatment of Simulated Radioactive Waste Water Containing Cs+ with Clinoptilotite

Liu Aiping1,2,Liu Suihai2,Wang Hui2   

  1. 1.College of Environment and Resource of Southwest University of Science and Technology;2.Key Laboratory Joint Construction by Provinces and the Ministry of Education of Solid Waste Treatment and Resource of Ministry of Education
  • Online:2012-04-23 Published:2012-04-26

摘要: 用CsNO3配制成模拟含铯放射性废水,以新疆某地产斜发沸石为吸附剂,进行了Cs+的吸附和解吸试验,并探讨了等温吸附模式及解吸动力学行为。结果表明:斜发沸石对Cs+的吸附在16 h时达到平衡,其饱和吸附量为196.99 mg/g,等温吸附模式为Langmuir模式;10 g/L斜发沸石用量下,要保证Cs+的去除率达到97%以上,水中Cs+浓度不宜超过664.55 mg/L;斜发沸石上Cs+的解吸动力学行为适合用指数模型描述,理论上,要使饱和吸附的Cs+完全解吸,耗时将长达约99 d,显示出斜发沸石很强的固铯能力。

关键词: 斜发沸石, 模拟含铯放射性废水, 吸附, 解吸

Abstract: Taking clinoptilotite in Xinjiang as adsorbent, carried out the adsorption and desorption tests to the simulated radioactive waste water containing Cs+ prepared by CsNO3, then discussed the isothermal absorption model and desorption dynamic behavior. The results show:clinoptilolite on removal rate of clinoptilolite to Cs+ reaches equilibrium after 16 h, the saturated dosage adsorption is at 196.99 mg/g, the isothermal absorption model is Langmuir moel; under the dosage of Clinoptilotite at 10 g/L, in order to insure the removal rate of Cs+ above 97%, the concentration of Cs+ in water must be less than 664.55 mg/L; the desorption dynamic behavior of clinoptilotite to Cs+ is suit to the description of index model, and it will take 99 d to fully desorb the saturated adsorption Cs+ in theoretically which proves the solid ability of clinoptilotite to Cs+.

Key words: Clinoptilotite, Simulated radioactive waste water containing Cs, Adsorption, Desorption