期刊论文

Extraction of Uranium from Biological Matrices Using Supercritical CO_2 Fluid

中文

环境科学与技术

1003-6504

2018

41

8

1-5

10.19672/j.cnki.1003-6504.2018.08.001

91026015:国家自然科学基金 CX2017B520:湖南省研究生科研创新项目

本校为第一机构

铀矿采冶和加工过程中引起的放射性环境污染的修复是环境治理的一个重要难题,新兴的植物修复技术在放射性环境修复中具有潜在的优势。该文实验研究了超临界CO2流体萃取植物修复中所产生的富铀植物中的铀。利用正交实验,研究了螯合剂种类、压强、温度、时间对超临界CO2流体萃取植物中铀的影响。结果表明以HNO3-TBP作为螯合剂,超临界CO2流体可以有效萃取植物中的铀,最佳工艺参数为压强20 MPa、温度50℃、萃取时间45 min,铀萃取率达到90.56%。超临界CO2流体可望回收植物修复中所产生的富铀植物中的铀。

Remediation of radioactive contamination caused by uranium mining, smelting and processing is a problem difficult to deal with in environmental management. On the other hand, there has been an emerging phytoremediation technology which has potential advantages in radioactive contamination remediation. In this paper, technology of uranium extraction by supercritical CO_2 fluid was experimentally studied focusing on uranium extraction from the uranium-enriched plants generated in phyto-remediation. By orthogonal experiment, the effects of factors...