期刊论文

中文

现代化工

0253-4320

2022

42

7

90-96

国家自然科学基金资助项目（51174117）； 湖南省教育厅科研平台项目（15K106）； 湖南省创新平台开放基金资助项目（17K078）；

本校为第一机构

以水热法制备了二元水滑石(MnAl-LDH)和三元水滑石(MnMgAl-LDH),将其作为固定剂对U(Ⅵ)污染的土壤进行修复。利用毒性浸出实验(TCLP)和Tessier逐级化学提取法研究了固定前后铀的浸出特性与形态变化。结果表明,当含铀土壤不添加固定剂时,铀的浸出质量分数为147.20 mg/kg;当土壤中添加MnAl-LDH为固定剂培养28 d后,土壤中铀的浸出质量分数为44.16 mg/kg,浸出率为30.00%;投加MnMgAl-LDH培养28 d后,土壤中铀的浸出质量分数仅为31.90 mg/kg,浸出率降低至21.67%。

Binary hydrotalcite(MnAl-LDH) and ternary hydrotalcite(MnMgAl-LDH) are prepared by hydrothermal method, and used as fixative to remediate U(Ⅵ)-contaminated soil.The leaching characteristics and morphological changes of uranium before and after fixation are studied by means of toxic leaching experiment(TCLP) and Tessier step-by-step chemical extraction method.It is shown that the leaching concentration of uranium is 147.20 mg·kgwhen no fixative is added into the uranium-containing soil.The leaching concentration of uranium in the soil is 44.16...