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Extraction of gold, palladium and silver ions using organically modified silica-coated magnetic nanoparticles and silica gel as a sorbent
Microchimica Acta ( IF 5.7 ) Pub Date : 2017-07-14 , DOI: 10.1007/s00604-017-2414-x
Hossein Vojoudi , Alireza Badiei , Alireza Banaei , Shahriyar Bahar , Soheyla Karimi , Ghodsi Mohammadi Ziarani , Mohammad Reza Ganjali

AbstractTwo new adsorbents were synthesized by covalently grafting 2,3-Bis(2-formylphenoxy)-propan-1-ol (BH) onto the surface of silica-coated magnetic nanoparticles and silica gel by a conventional method and a vice-versa method. The morphology and properties of the adsorbents were characterized by FT-IR, XRD, SEM, TEM, VSM, TGA, UV-Vis, Optical microscope and DLS. The materials are shown to be effective adsorbents for the selective extraction of the ions of Au(III), Pd(II) and Ag(I) from aqueous mixed metal ions solution also containing Cu(II), Co(II), Ni(II), Zn(II) and Pb(II). Syringe and batch techniques are compared. The ions can be desorbed with 0.5 M HCl and quantified by FAAS. The maximum adsorption capacity of the MN-Si-NH2-BH and Si-NH2-BH were determined to be 257, 197 mg·g−1 for Au(III), 311, 191 mg·g−1 for Ag(I) and 301, 222 mg·g−1 for Pd(II), respectively. The detection limits (for n = 15 and at an S/N ratio of 2 blank standard deviations) are 0.12, 0.28, and 0.17 μg·L−1 for Au(III), Pd(II) and Ag(I), respectively. Graphical AbstractSynthesis of two new adsorbents, silica-coated magnetic nanoparticles and silica gel modified with 2,3-Bis(2-formylphenoxy)-propan-1-ol with normal and vice-versa methods. The prepared magnetic and non-magnetic adsorbents were applied to selective extraction of noble metal ions including Au(III), Pd(II) and Ag(I) ions from aqueous solutions using syringe and batch techniques.

中文翻译:

使用有机改性的二氧化硅包覆磁性纳米粒子和硅胶作为吸附剂提取金、钯和银离子

摘要 将2,3-双(2-甲酰基苯氧基)-丙-1-醇(BH)通过常规方法与硅胶表面共价接枝,合成了两种新型吸附剂。通过FT-IR、XRD、SEM、TEM、VSM、TGA、UV-Vis、光学显微镜和DLS对吸附剂的形貌和性质进行了表征。这些材料被证明是一种有效的吸附剂,可用于从还含有 Cu(II)、Co(II)、Ni() 的混合金属离子水溶液中选择性萃取 Au(III)、Pd(II) 和 Ag(I) 的离子。 II)、Zn(II) 和 Pb(II)。比较了注射器和分批技术。离子可以用 0.5 M HCl 解吸并通过 FAAS 进行定量。MN-Si-NH2-BH 和 Si-NH2-BH 的最大吸附容量确定为 257, 197 mg·g-1 对 Au(III), 311, 191 mg·g-1 对 Ag(I)和301,Pd(II) 分别为 222 mg·g-1。Au(III)、Pd(II) 和 Ag(I) 的检测限(n = 15 且信噪比为 2 个空白标准偏差时)分别为 0.12、0.28 和 0.17 μg·L-1 . 图形摘要 两种新型吸附剂、二氧化硅包覆的磁性纳米颗粒和用 2,3-双(2-甲酰基苯氧基)-丙-1-醇改性的硅胶,用正常方法和反之亦然的方法合成。制备的磁性和非磁性吸附剂用于使用注射器和分批技术从水溶液中选择性提取贵金属离子,包括 Au(III)、Pd(II) 和 Ag(I) 离子。二氧化硅包覆的磁性纳米粒子和用 2,3-双(2-甲酰基苯氧基)-丙-1-醇改性的硅胶,使用正常方法,反之亦然。制备的磁性和非磁性吸附剂用于使用注射器和分批技术从水溶液中选择性提取贵金属离子,包括 Au(III)、Pd(II) 和 Ag(I) 离子。二氧化硅包覆的磁性纳米粒子和用 2,3-双(2-甲酰基苯氧基)-丙-1-醇改性的硅胶,使用正常方法,反之亦然。制备的磁性和非磁性吸附剂用于使用注射器和分批技术从水溶液中选择性提取贵金属离子,包括 Au(III)、Pd(II) 和 Ag(I) 离子。
更新日期:2017-07-14
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