期刊论文

Liu, Qing(liuqing197901@163.com)

中文

复合材料学报

1000-3851

2022

39

12

5934-5945

10.13801/j.cnki.fhclxb.20211129.004

20K111:湖南省高校创新平台开放基金项目 18C0432:湖南省教育厅项目

本校为第一机构

铀矿开采与水冶过程产生大量铀废水,对周边生态环境造成污染,因此高效绿色治理是保障核工业可持续发展及生态安全的重要基础。本文以向日葵叶为原料绿色合成生物炭负载纳米铁颗粒(GN-FeNPs/BC),并用于去除水中的U(VI)。利用向日葵叶制备植物提取液,然后将残渣热解制备成生物炭,最后将七水硫酸亚铁溶液、生物炭和植物提取液混合,成功制备出绿色纳米铁复合材料。探究了生物炭碳化温度、铁碳比、 pH值、温度、时间和U(VI)浓度对除铀的影响。在298 K、pH=5时,最大吸附量为96.43 mg·g~(-1),并进行动力学和热力学研究。结果表明,准二级动力学模型和Langmuir等温吸附模型拟合良好。热力学常数表明GNFe...

Uranium mining and hydrometallurgy produce a large amount of uranium wastewater, which causes pollution to the surrounding ecological environment. Therefore, efficient and green treatment is an important basis to guarantee the sustainable development and ecological security of nuclear industry. In this study, sunflower leaves were used as raw materials for green synthesis of biochar-loaded nano-iron particles (GN-FeNPs/BC) that used to remove U(VI) in water. Sunflower leaves were used to prepare plant extract, and then the residue was pyrolyzed...