METALS AND METAL MATRIX COMPOSITES |
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Adsorption Behavior of Uranium(Ⅵ) onto Porphyrin-based MOF |
SUN Yanbing, LYU Riwen, HAN Xuewen, ZHONG Weihong, HUANG Jian, LIU Chang, DAI Ying, CAO Xiaohong
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State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China |
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Abstract In this study, two porphyrin-based metal-organic frameworks (MOF) containing Zn-TCPP and Co-TCPP (TCPP represents mes-tetrakis(4-carboxyphenyl) porphin) were synthesized via a simple bottom-up process. The microstructure and morphology of the prepared porphyrin-based MOF were characterized by scanning electron microscopy (SEM), Zeta analysis, infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). The effects of different pH, contact time, initial uranium concentration and temperature on the adsorption of U(Ⅵ) were investigated. The results of batch experiments showed that the maximum adsorption capacities of Zn-TCPP and Co-TCPP for U(Ⅵ) were 412.2 mg/g and 307.7 mg/g (298.15 K, pH=5.5), respectively. The adsorption process closely fitted the Langmuir isotherm, and pseudo-second-order kinetics models indicated that chemical and monolayer adsorption dominated the adsorption process of U(Ⅵ) onto both porphyrin-based MOF. It was found that both porphyrin-based MOF showed good recyclability and the adsorption capacity was still maintained above 80% after five adsorption-desorption cycles.
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Published: 26 April 2020
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Fund:This work was financially supported by the National Natural Science Foundation of China (11605027), Project of the Jiangxi Provincial Department of Education (GJJ160550) and the Project of the Jiangxi Graduate Innovation Fund (YC2018-S345, DHYC-201827). |
Corresponding Authors:
Xiaohong Caoobtained her Ph.D. degree in analytical chemistry from Xiamen University in Sep. 2006—Dec. 2011 and served in East China University of Technology(ECUT), till now. She is currently a professor and master supervisor in ECUT. She has published more than 10 journal papers as the first or corresponding author. She presides over 6 projects of National Natural Science Foundation of China and Jiangxi Provincial Foundation. Her current research is focused on electroanalytical chemistry,adsorption and determination of radionuclides.
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About author:: Yanbing Sun,a graduate student of East China University of Technology, enrolled in 2017. His research work is mainly the separation and enrichment of radionuclides and electrochemical analysis. Received a postgraduate innovation project in Jiangxi Province. |
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