摘要
以六水合三氯化铁,2-氨基对苯二甲酸等为原料,通过化学合成法制备出一种新型吸附材料MIL-53 (Fe)胺肟衍生物(MIL-53(Fe)-AO)。通过粉末X射线衍射(PXRD)、傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)对其结构和形貌进行表征。同时考察pH值,铀溶液初始浓度,吸附剂投加量,反应时间与MIL-53(Fe)-AO吸附U(Ⅵ)的关系,并计算动力学参数。研究结果表明:室温25 ℃下,当pH值为5,铀溶液初始浓度为25 mg/L,吸附剂投加量为25 mg,反应1 h后MIL-53(Fe)-AO对铀的吸附率可以达到最大值且该吸附过程符合准二级动力学模型。此外,在多种离子共存的条件下,MIL-53(Fe)-AO表现出对U(Ⅵ)较好的选择性。
A novel adsorption material MIL-53(Fe)amine oxime derivative(MIL-53(Fe)-AO)was prepared by chemical synthesis using ferric chloride hexahydrate and 2-amino-terepthalic acid as raw materials.In this work,the structure and morphology were characterized by powder X-ray diffraction(PXRD),Fourier transform infrared spectroscopy(FT-IR)and scanning electron microscopy(SEM).At the same time,the effects of pH value,initial concentration of uranium solution,dosage of adsorbent and reaction time on the adsorption of U(VI)by MIL-53(Fe)-AO were investigated and the kinetic parameters were calculated.The results showed that the optimum experimental condition was pH=5 at room temperature,the initial concentration of uranium solution was 25 mg/L and the adsorption capacity of adsorbent was 25 mg,under this condition the adsorption capacity of MIL-53(Fe)-AO reached the maximum value.On the other side,the adsorption kinetics showed that the adsorption equilibrium was reached within one hour which in accordance with the two-stage kinetic model.Besides,MIL-53(Fe)-AO behaved a good selectivity to Uranium(VI)with the presence of multiple ions in solution.
作者
陈方
张康
朱琦琦
罗佳琦
彭国文
Chen Fang;Zhang Kang;Zhu Qiqi;Luo Jiaqi;Peng Guowen(College of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,China;College of Public Health,University of South China,Hengyang 421001,China;College of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,China;Hunan Province Uranium Tailings Reservoir Decommissioning Control Engineering Technology Research Center,University of South China,Hengyang 421001,China)
出处
《山东化工》
CAS
2021年第17期14-17,21,共5页
Shandong Chemical Industry
