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Separation and Preconcentration of Boron with a Glucamine Modified Novel Magnetic Sorbent

机译：氨基葡萄糖修饰的新型磁吸附剂对硼的分离富集

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摘要

A novel, simple method based on magnetic separation was developed for analytical purposes. In this method, N-methyl-D-glucamine (NMDG) modified magnetic micro-particles that were synthesized by using the sol-gel method were used for the selective extraction and preconcentration of boron from aqueous solutions. This method combines the simplicity and selectivity of solvent extraction with the easy separation of magnetic microparticles from a solution with a magnet without any preliminary filtration step. The structure of the prepared γ-Fe_2O_3-SiO_2-NMDG (magnetic sorbent) composites were characterized by using X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FTIR). The influence of different parameters on the sorbent capacity, such as the sorption/desorption of boron, magnetic sorbent dosage, pH, equilibrium time, type, and amount of stripping solution, were evaluated by using the magnetic sorbent. Any equilibrium pH greater than 6 can be used for sorption. Desorption from the sorbent was carried out by using 1.0 M HCl. The sorption and desorption efficiency of the γ-Fe_2O_3-SiO_2-NMDG was found as 92.5 ± 0.5% and 99.8 ± 6%, respectively.
机译：为了分析的目的，开发了一种基于磁分离的新颖，简单的方法。在这种方法中，使用溶胶-凝胶法合成的N-甲基-D-葡糖胺（NMDG）修饰的磁性微粒用于从水溶液中选择性萃取和预浓缩硼。该方法将溶剂萃取的简便性和选择性与使用磁体轻松地从溶液中分离磁性微粒相结合，无需任何初步过滤步骤。利用X射线衍射（XRD），透射电子显微镜（TEM）和傅里叶变换红外光谱（FTIR）对制备的γ-Fe_2O_3-SiO_2-NMDG（磁性吸附剂）复合材料的结构进行了表征。通过使用磁性吸附剂来评估不同参数对吸附剂容量的影响，例如硼的吸附/解吸，磁性吸附剂用量，pH，平衡时间，汽提溶液的类型和量。任何大于6的平衡pH均可用于吸附。通过使用1.0M HCl从吸附剂解吸。 γ-Fe_2O_3-SiO_2-NMDG的吸附和解吸效率分别为92.5±0.5％和99.8±6％。

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