酰胺化磁性粘土的制备及对U(Ⅵ)的去除  

Preparation of Amidated Magnetic Clay and Removal of U(VI)from Aqueous Solution

作　　者：岳艳雪 朱薇羽 孙玉兵 YUE Yanxue;ZHU Weiyu;SUN Yubing(Colleg of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学环境科学与工程学院,北京102206

出　　处：《广州化工》2025年第6期76-79,共4页GuangZhou Chemical Industry

摘　　要：将Fe_(3)O_(4)纳米颗粒负载粘土再进行酰胺肟功能化制备复合材料(AO-Fe_(3)O_(4)-Clay),通过X射线衍射(XRD)和傅里叶红外光谱(FT-IR)对其进行表征。研究了不同影响因素下(pH、离子强度、反应时间、浓度、温度)对AO-Fe_(3)O_(4)-Clay吸附U(Ⅵ)的性能影响。吸附动力学和等温吸附分别适合伪二级动力学模型和Langmuir模型,最大吸附量为430.396 mg/g。在低和高pH下分别为离子交换/外层络合和内层络合为主,研究结果对功能化粘土的实际环境修复具有重要的指导意义。Fe_(3)O_(4)nanoparticles was primarily loaded on the surface of clays and then modified with amidoxime functionalization.The as-prepared AO-Fe_(3)O_(4)-Clay was characterized by X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FT-IR).The effect of influencing factors(pH,ionic strength,reaction time,concentration and temperature)on the adsorption performance of U(VI)on AO-Fe_(3)O_(4)-Clay was investigated.The adsorption kinetics and isotherms can be fitted well with the pseudo-secondary kinetic model and Langmuir model,respectively.The maximum adsorption capacity of AO-Fe_(3)O_(4)-Clay was 430.396 mg/g.The interaction mechanism at low and high pH was ion exchange/outer sphere complexation and inner sphere surface complexation,respectively.These findings were crucial for the actual application of functionalized clay in environmental remediation.

关 键 词：活性白土 Fe_(3)O_(4) 吸附 铀 

分 类 号：TQ424[化学工程]