期刊论文

Green synthesis of FeCu/BT and its removal performance of uranium

中文

工业水处理

1005-829X

2020

40

12

83-87

10.11894/iwt.2020-0085

国家自然科学基金(51508317) 湖南省教育厅基金(18C0432) 铀矿冶放射性控制技术湖南省工程研究中心、湖南省铀尾矿库退役治理技术工程技术研究中心联合开放课题(2018YKZX2011)。

本校为第一机构

制备了膨润土负载纳米铁铜双金属复合材料(FeCu/BT),用SEM、EDS、FTIR、XRD、XPS进行表征并分析铀去除机理,考察了pH、投加量、初始浓度、离子干扰等因素对水溶液中铀去除效果的影响。结果表明,在pH为7、投加量为4 g/L、反应时间为60 min、初始铀质量浓度为10 mg/L时,铀去除率达到95.5%。共存离子PO4 3-对去除效率的影响最大,SO_4~(2-)、NO_3~-几乎无影响。FeCu/BT除铀过程的吸附动力学符合准二级动力学模型,以化学吸附为主;等温吸附模型符合Freundlich等温吸附模型,为非均一多分子层吸附。FeCu/BT除铀过程主要为吸附、还原、络合作用, Cu起到催化、固定和吸附的作用。

Bentonite-supported nano-iron-copper bimetal material(FeCu/BT) was prepared,characterized by SEM, EDS,FTIR,XRD,and XPS,and its uranium removal mechanism was analyzed. The uranium removal from aqueous solutions at different pH,dosage,initial concentration,and ion interference conditions were studied. Experiments showed that the removal rate of uranium reached 95.5% at the conditions of pH=7,the dosage 4 g/L,the reaction time 60 min,and the initial uranium mass concentration 10 mg/L. Co-existing ion PO4 3- had the most negative effect on reaction, meanwhile that SO_4~(2-) and NO3 - almost had no...