| Synthesis of N,O-rich active site porous polymers and their efficient recovery of Gd(Ⅲ) from solution |
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| 引用本文： | Bin Xiao,Lijinhong Huang,Jiacai Ou,Bin Zeng,Zhiqiang Zou,Xiangrong Zeng,Wanfu Huang. Synthesis of N,O-rich active site porous polymers and their efficient recovery of Gd(Ⅲ) from solution[J]. 中国稀土学报(英文版), 2023, 41(9): 1419-1428. DOI: 10.1016/j.jre.2022.08.012 |
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| 作者姓名： | Bin Xiao Lijinhong Huang Jiacai Ou Bin Zeng Zhiqiang Zou Xiangrong Zeng Wanfu Huang |
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| 作者单位： | 1. School of Resource and Environmental Engineering,Jiangxi University of Science and Technology;2. School of Resources and Architectural Engineering,Gannan University of Science and Technology;3. Faculty of Science and Engineering,WA School of Mines:Minerals,Energy and Chemical Engineering,Curtin University;4. School of Architecture and Design,Jiangxi University of Science and Technology |
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| 基金项目： | supported by the National Natural Science Foundation of China (41662004); |
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| 摘 要： | Our previous study found that the adsorption performance of porous carbon for Gd(Ⅲ) could be significantly improved by increasing the N,and O functional groups on its surface.Unfortunately,the adsorption capacity of porous carbon is low due to the limited number of N,and O functional groups that can be loaded on its surface.Due to the advantage of customizable functional groups of porous organic polymers(POPs),the triazine-based Tb-MEL and hydroxyl-modified triazine-based Tp-MEL were synthesized...
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| 收稿时间： | 2022-03-25 |
Synthesis of N,O-rich active site porous polymers and their efficient recovery of Gd(III) from solution |
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| Affiliation: | 1. School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. School of Resources and Architectural Engineering, Gannan University of Science and Technology, Ganzhou 341000, China;3. Faculty of Science and Engineering, WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, WA, Australia;4. School of Architecture and Design, Jiangxi University of Science and Technology, Ganzhou 341000, China;1. Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification, Ganzhou 341000, China;3. Key Laboratory of Ionic Rare Earth Resources and Environment, Ministry of Natural Resources, Ganzhou 341000, China;4. Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation, Ganzhou 341000, China;1. Laboratory of Green Chemistry, Department of Chemistry, Faculty of Technology, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland;2. National & Local Joint Engineering Laboratory for New Petro-Chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, China |
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| Abstract: | Our previous study found that the adsorption performance of porous carbon for Gd(III) could be significantly improved by increasing the N, and O functional groups on its surface. Unfortunately, the adsorption capacity of porous carbon is low due to the limited number of N, and O functional groups that can be loaded on its surface. Due to the advantage of customizable functional groups of porous organic polymers (POPs), the triazine-based Tb-MEL and hydroxyl-modified triazine-based Tp-MEL were synthesized by a one-step hydrothermal method using nitrogen-rich melamine as the raw material and triformylbenzene (Tb) and 2,4,6-triformylphloroglucinol (Tp), respectively. The Gd(III) adsorption isotherms and kinetic curves of Tb-MEL, and Tp-MEL at pH = 6 and T = 25 °C are in high agreement with the Langmuir isotherm (R2>0.998) and pseudo-second-order kinetics (R2>0.993), respectively. The fitted maximum adsorption capacity (qmax) is about 136.05 mg/g, much higher than 58.38 mg/g of Tb-MEL. The adsorption efficiency for Gd(III) at pH = 7 is close to 100%, and Tp-MEL maintains 62.4% of the initial adsorption capacity after ten cycles of sorption/desorption of Gd(III), with an average elution efficiency of more than 90%. Adsorption selection performance tests show that Tp-MEL has good adsorption selectivity for HREE ions, and the selectivity is as follows: Lu3+>Y3+>Gd3+>Nd3+>La3+>Al3+>Ca2+>Mg2+. Batch adsorption, Brunauer-Emmett-Teller (BET) method, and X-ray photoelectron spectrometer (XPS) tests show that hydroxyl modifications lose the specific surface area of the polymer, and the functional groups contribute more to the adsorption performance than the specific surface area. |
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| Keywords: | N, O functional groups Triazine-based Hydroxyl-modified Adsorption performance Rare earths |
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