原子能科学技术2018，Vol.52Issue(4)：583-589,7.DOI:10.7538/yzk.2017.youxian.0555
不同固定剂对铀尾矿库中铀稳定效果的试验研究
Experimental Study on Immobilization of Uranium in Uranium Tailing Pond Using Different Fixatives
摘要
Abstract
Four fixatives including chitosan, attapulgite, zero valent iron and hydroxyapatite were separately added to immobilize uranium in uranium tailing pond. The species distribution characteristic of uranium was determined by stepwise chemical extraction, and the leaching feature of uranium was measured by toxicity characteristic leaching procedure(TCLP). The results indicate that the effects of fixatives on the species distribution of uranium have significant difference. Exchangeable (including water soluble)uranium is changed into other stable states after addition of chitosan, attapulgite and zero valent iron, and the residual uranium content increases with the introduction of hydroxyapatite. The order of anchorage capacity is hydroxyapatite＞zero valent iron＞attapulgite＞chitosan. The results of TCLP indicate that uranium is activated by chitosan treatment, and leaching increases by 4％-23％. The hydroxyapatite reduces uranium leaching by nearly 80％, which is the best fixative for the remediation of uranium in uranium tailing pond.关键词
固定剂/铀尾矿库/铀/固定/形态分布Key words
fixative/uranium tailing pond/uranium/immobilization/species distribution分类
资源环境引用本文复制引用
周书葵,侯康龙,刘迎九,王浩铭,李智东,张建..不同固定剂对铀尾矿库中铀稳定效果的试验研究[J].原子能科学技术,2018,52(4):583-589,7.基金项目
国家自然科学基金资助项目(51174117) （51174117）
湖南省高校创新平台开放基金资助项目(15K106) （15K106）
