期刊论文

Effectiveness and mechanism of Ba0.5Sr0.5FeO3-δ in treatment of uranium-containing wastewater

中文

化学工程

1005-9954

2024

52

3

35-40

10.3969/j.issn.1005-9954.2024.03.007

42277458:国家自然科学基金 22B0423:湖南省教育厅科学研究项目

本校为第一机构

采用溶胶凝胶法合成BSF(Ba0.5Sr0.5Fe03-δ)钙钛矿材料,研究BSF对含铀废水的处理效果及其对U(Ⅵ)的吸附机理.结果表明当BSF的投加量为0.8g/L、含铀废水的初始pH=5、反应时间为15 min时,对初始质量浓度为10 mg/L的含铀废水的处理效率可达97.38％.动力学和热力学拟合分析研究表明,BSF吸附U(Ⅵ)的过程中同时存在物理吸附和化学吸附,但主要以化学吸附为主,BSF对U(Ⅵ)的最大理论吸附容量可达181.83 mg/g.扫描电镜和X射线能谱分析结果表明BSF具有丰富的孔径结构,铀离子主要吸附在其表面孔径结构内.X射线光电子能谱证明BSF在去除U(Ⅵ)的过程中Fe2+可以将部分U(Ⅵ)转化为U(Ⅳ).对比其他吸附材料,BSF是一...

BSF(Ba0.5Sr0.5FeO3-δ)perovskite material was synthesized by the sol-gel method,and its performance was examined in treating uranium-containing wastewater,while also delving into its adsorption mechanism for U(Ⅵ).The results indicate that when the dosage of BSF is 0.8 g/L,the initial pH of uranium-containing wastewater is 5,and the reaction time is 15 min,the treatment efficiency for uranium-containing wastewater with an initial mass concentration of 10 mg/L can reach 97.38％.The kinetic and thermodynamic fitting analysis reveal that the adsor...