偕胺肟基改性丝瓜络的制备及其铀吸附性能  

Preparation of amidoxime modified luffa for uranium adsorption

作　　者：苏守政 王君 蒋保江[3] SU Shouzheng;WANG Jun;JIANG Baojiang(School of Nuclear Science and Engineering,Harbin Engineering University,Harbin 150001,China;School of Materials Science and Chemistry Engineering,Harbin Engineering University,Harbin 150001,China;School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,哈尔滨150001 [2]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001 [3]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2021年第2期176-182,共7页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金青年科学基金资助项目(52003067);黑龙江省自然科学基金资助项目(LH2020E061);中国博士后科学基金资助项目(2019M651268)。

摘　　要：以丝瓜络为基体,在其表面接枝对铀(U(Ⅵ))具有特异性吸附的偕胺肟基制备高性能的海水提铀材料,通过扫描电子显微镜(SEM)、傅立叶变换红外光谱(FT-IR)和元素分析(EA)对其结构和形貌进行分析,探究了溶液pH、U(Ⅵ)初始浓度和反应时间对吸附性能的影响规律,并结合等温吸附模型和动力学模型探讨其对U(Ⅵ)的吸附过程。结果表明,偕胺肟基功能化丝瓜络在pH=6.0的条件下,对U(Ⅵ)的吸附性能最佳。吸附过程符合Langmuir等温吸附模型和准二级动力学模型,最大吸附量为259.7 mg·g^(-1)。在U(Ⅵ)浓度为3.19~101.83μg·L^(-1)的模拟海水中,吸附率大于90%。High performance material for adsorption of uranium(U(Ⅵ))from seawater was prepared by grafting amidoxime group with luffa.The structure and morphology of the material were characterized by scanning electron microscope(SEM),Fourier transform infrared spectrometer(FT-IR)and elemental analyzer(EA).The effects of solution pH,initial concentration of U(Ⅵ)and reaction time on adsorption performance were also investigated.Moreover,the process of adsorption was studied by isothermal and kinetic adsorption models.The results showed that amidoxime modified luffa had the best U(Ⅵ)adsorption capacity at pH=6.0 and the adsorption followed the Langmuir isotherm and pseudo-second order models with the maximum adsorption capacity of 259.7 mg·g^(-1).The adsorption rate was more than 90%in simulated seawater with U(Ⅵ)concentrations of 3.19~101.83μg·L^(-1).

关 键 词：吸附 U(Ⅵ) 偕胺肟 丝瓜络 

分 类 号：O647.33[理学—物理化学]