EDTA/纳米氧化铝复合材料对钍的吸附研究  

Study on the Adsorption of Thorium by EDTA/Nano-Alumina Composite Material

作　　者：龙琳芳 罗忠 LONG Linfang;LUO Zhong(Jiangxi Fuzhou Ecological Environment Monitoring Center,Fuzhou Jiangxi 344416,China)

机构地区：[1]江西省抚州生态环境监测中心,江西抚州344416

出　　处：《江西化工》2025年第2期102-105,共4页Jiangxi Chemical Industry

摘　　要：纳米Al_(2)O_(3)具有良好的热学、光学、电学、磁学以及化学方面的性质,应用前景十分广阔,然而,较大的比表面积及容易凝聚成团的特性,制约了纳米Al_(2)O_(3)的实际应用。本文以乙二胺四乙酸(EDTA)为表面处理剂,对纳米Al_(2)O_(3)进行了表面改性,研究了复合材料在静态条件下对钍(Ⅵ)的吸附性能。探讨了溶液pH值、初始浓度、吸附时间等对钍(Ⅵ)吸附率的影响,并研究了其吸附稳定性。结果表明:改性后的纳米Al_(2)O_(3)在水中的分散性较未改性之前有明显提高;溶液pH值对吸附效果的影响较大,在pH=4时吸附效果最佳,吸附40 min后达到吸附平衡;随着钍浓度的增加,吸附率呈下降趋势,而吸附容量逐渐上升。Nano-Al_(2)O_(3) has good thermal,optical,electrical,magnetic and chemical properties,and has broad application prospects.However,the large specific surface area and the nature of easy agglomeration limit the practical application of nano-Al_(2)O_(3).In this paper,ethylenediaminetetraacetic acid(EDTA)was used as a surface treatment agent to modify the surface of nano-Al_(2)O_(3),and the adsorption of thorium(VI)by composite materials under static conditions was studied.The effects of solution pH,initial concentration and adsorption time on the adsorption rate of thorium(VI)were discussed,and the adsorption stability was studied.The results showed that the dispersion of modified nano-Al_(2)O_(3) in water was significantly improved compared with that before modification.The pH value of the solution has a great influence on the adsorption,and the adsorption is the best at pH=4.The adsorption equilibrium was reached after adsorption for 40 min.With the increase of thorium concentration,the adsorption rate decreased,while the adsorption capacity increased gradually.

关 键 词：EDTA/Al2O3纳米复合粒子 钍 放射性金属 吸附性 

分 类 号：TB333[一般工业技术—材料科学与工程]