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Synthesis and characterization of core-shell magnetic molecularly imprinted polymers for selective extraction of allocryptopine from the wastewater of Macleaya cordata (Willd) R. Br.
Journal of Molecular Recognition ( IF 2.7 ) Pub Date : 2020-03-26 , DOI: 10.1002/jmr.2844
Lu Wang 1 , Yanhong Wang 1 , Binbin Zhou 1 , Ming Zhong 1
Affiliation  

A novel type of magnetic molecularly imprinted polymers (MMIP) as the solid‐phase extraction sorbent was prepared, which can extract effectively the allocryptopine from the waster of Macleaya cordata (Willd) R . Br . In this study, MMIP was synthesized by using Fe3O4@SiO2, 4‐vinyl‐pyridine, ethylene glycol dimethacrylate, and allocryptopine, and these ingredients worked as magnetic core, functional monomer, cross‐linker, and template, respectively. Concluded by the calculation of Gaussian 09 software, different ratio models of 4‐vinyl‐pyridine and allocryptopine were simulated, and the optimal ratio was 1:5 and the energy was −2205.34 kJ/mol. Transmission electron microscopy, vibration sample magnetometry, X‐ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis were used to determine the morphology and structure of MMIP. Furthermore, the results of adsorption experiments indicated that MMIP had high selectivity, excellent recyclability, and good adsorption performance (9.86 mg/g, 298 K). The adsorption process was consistent with the Langmuir adsorption isotherm (R 2 > 0.98, 298 K) and pseudo‐second‐order kinetics model (R 2 > 0.99, 298 K). After six times adsorption‐desorption experiments, the adsorption amount of MMIP only reduced to 8.5%. In the experiments of selective adsorption, MMIP has better adsorption properties for allocryptopine (ALL, C21H23NO5) than those having the same functional group. The limit of detection (LOD) was 0.4 μg/mL. The relative standard deviation ranged from 0.09% to 0.72%. The recovery of allocryptopine in samples ranged from 93.60% to 106.19%. In addition, the synthesized complex had a certain adsorption effect on allocryptopine separating from the wastewater of Macleaya cordata (Willd) R . Br .

中文翻译:

用于从 Macleaya cordata (Willd) R. Br. 废水中选择性提取别隐碱的核壳磁性分子印迹聚合物的合成和表征。

制备了一种新型的磁性分子印迹聚合物(MMIP)作为固相萃取吸附剂,可以有效地从Macleaya cordata (Willd) R的废物中提取别隐品碱。BR。在本研究中,MMIP 是通过使用 Fe 3 O 4 @SiO 2合成的、4-乙烯基吡啶、乙二醇二甲基丙烯酸酯和别隐碱,这些成分分别作为磁芯、功能单体、交联剂和模板。通过Gaussian 09软件计算得出结论,模拟了4-乙烯基吡啶与别隐品碱的不同配比模型,最佳配比为1:5,能量为-2205.34 kJ/mol。使用透射电子显微镜、振动样品磁强计、X 射线衍射、傅里叶变换红外光谱和热重分析来确定 MMIP 的形貌和结构。此外,吸附实验结果表明MMIP具有高选择性、优异的可回收性和良好的吸附性能(9.86 mg/g,298 K)。吸附过程符合朗缪尔吸附等温线(R 2 > 0.98, 298 K)和准二级动力学模型(R 2 > 0.99, 298 K)。经过6次吸附-解吸实验,MMIP的吸附量仅减少到8.5%。在选择性吸附实验中,MMIP对别隐碱(ALL,C 21 H 23 NO 5)的吸附性能优于具有相同官能团的吸附剂。检测限 (LOD) 为 0.4 μg/mL。相对标准偏差范围为 0.09% 至 0.72%。样品中别隐品碱的回收率为 93.60% 至 106.19%。此外,合成的络合物对Macleaya cordata (Willd) R废水中分离的别隐碱具有一定的吸附作用。BR
更新日期:2020-03-26
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