纳米氧化铁对钍(IV)的吸附研究  

Adsorption of Thorium (IV) from Aqueous Solutions by Ferric Oxide Nanoparticles

作　　者：梁喜珍[1] 周跃明[1,2] 胡军 马建国[1] LIANG Xi-zhen;ZHOU Yue-ming;HU Jun;MA Jian-guo(School of Chemistry,Biology and Material Sciences,East China University of Technology, Nanchang 330013,China;Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation,Nanchang 330013,China)

机构地区：[1]东华理工大学化学生物与材料科学学院,江西南昌330013 [2]江西省质谱科学与仪器重点实验室,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2019年第3期274-278,290,共6页Journal of East China University of Technology(Natural Science)

基　　金：东华理工大学质谱重点实验室开放基金(JXMS201507);江西省教育厅项目(GJJ150611,GJJ170435,GJJ160549)

摘　　要：研究了纳米氧化铁对水溶液中钍的吸附行为。结果表明吸附行为受溶液pH值的影响较大,钍初始浓度为20mg/L、pH4.0时吸附率达到95.7%。随着离子强度的增加,吸附率下降。在研究范围内,纳米氧化铁对钍的吸附动力学特性可采用准二级动力学模型进行描述,其吸附等温线数据符合Langmuir吸附等温线模型。热力学分析表明,钍在纳米氧化铁上的吸附是一个自发的吸热过程。The adsorption behaviors of thorium(IV) from aqueous solutions by ferric oxide nanoparticles were investigated. The experimental results showed the adsorption rate of ferric oxide nanoparticle to thorium was affected greatly by pH value of aqueous solutions and the adsorption rate of the thorium ions was 95.7% at the initial concentration of thorium 20 mg/L and pH 4.0.In addition the adsorption rate decreased with the increase of ionic strength. The adsorption kinetic characteristic for ferric oxide nanoparticle to thorium was depicted betterly by pseudo-second-order kinetic model and the isothermal data for adsorption of ferric oxide nanoparticles to thorium followed the Langmuir isothermal models. The thermodynamic analysis indicated the adsorption of thorium onto ferric oxide nanoparticles was a spontaneously endothermal process.

关 键 词：纳米氧化铁 钍 吸附 

分 类 号：O647.3[理学—物理化学]