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Enhancement of selective Cu(II) sorption through preparation of surface-imprinted mesoporous silica SBA-15 under high molar concentration ratios of chloride and copper ions
Microporous and Mesoporous Materials ( IF 5.2 ) Pub Date : 2018-06-23 , DOI: 10.1016/j.micromeso.2018.06.038
Jin-Kyu Kang , Seung-Chan Lee , Song-Bae Kim

We synthesized and characterized surface-imprinted poly (ethyleneimine) (PEI)-grafted mesoporous silica SBA-15 (Cu-imprinted PEI-SBA-15) for selective Cu(II) sorption from aqueous solutions. To enhance the Cu(II) selectivity of Cu-imprinted PEI-SBA-15, Cu(II) loading on PEI-SBA-15 was increased via Cu(II) sorption under high-molar-concentration ratios of chloride (Cl) and Cu(II) ions. Then, selective Cu(II) sorption sites were increased through imprinting processes (crosslinking and elution) on Cu-loaded PEI-SBA-15. Selective experiments were performed using Cu-imprinted PEI-SBA-15 prepared at various [Cl]/[Cu(II)] ratios, ranging from 2 to 1000. In multinary solutions containing divalent ions, such as Cu(II), Pb(II), Zn(II), Ni(II), and Co(II), Cu(II) selectivity was highest (79.62) at a [Cl]/[Cu(II)] ratio of 500; the relative Cu(II) selectivity for Cu-imprinted PEI-SBA-15 over PEI-SBA-15 was 29.24. In multinary solutions containing Cu(II) along with trivalent and tetravalent ions, such as Al(III), Cr(III), and Zr(IV), the Cu(II) selectivity was also highest (3.40) at a ratio of 500; the relative Cu(II) selectivity was 3.96. In this study, we demonstrated that the Cu(II) selectivity of surface-imprinted SBA-15 could be enhanced through its preparation under high [Cl]/[Cu(II)] ratios.



中文翻译:

通过在氯和铜离子的高摩尔浓度比下制备表面印迹介孔二氧化硅SBA-15来提高选择性Cu(II)吸附

我们合成并表征了表面印迹聚(乙烯亚胺)(PEI)接枝的介孔二氧化硅SBA-15(Cu印迹PEI-SBA-15),用于从水溶液中选择性吸附Cu(II)。为了提高Cu印迹的PEI-SBA-15的Cu(II)选择性,在高摩尔浓度的氯化物(Cl)和高摩尔比下,通过Cu(II)吸附增加了PEI-SBA-15上Cu(II)的负载。 Cu(II)离子。然后,通过在载有铜的PEI-SBA-15上的压印过程(交联和洗脱)增加了选择性Cu(II)的吸附位点。使用进行选择性实验的Cu-印迹PEI-SBA-15在不同的[氯制备- ] / [铜(II)]比,范围为2至1000。在含有二价离子,例如Cu多元溶液(II),铅(II),锌(II),镍(II)和Co(II),铜(II)选择性是在[氯最高(79.62)-] / [Cu(II)]比为500;相对于PEI-SBA-15,Cu印迹PEI-SBA-15的相对Cu(II)选择性为29.24。在包含Cu(II)以及三价和四价离子(如Al(III),Cr(III)和Zr(IV))的多元溶液中,Cu(II)的选择性也最高,为500时为(3.40) ; Cu(II)的相对选择性为3.96。在这项研究中,我们表明,在Cu(II)表面印迹下高SBA-15可通过其制备来增强[氯的选择性- ] / [铜(II)]的比率。

更新日期:2018-06-23
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