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Preparation of sinapinaldehyde modified mesoporous silica materials and their application in selective extraction of trace Pb(Ⅱ)

机译:芥子醛改性的介孔二氧化硅材料的制备及其在痕量Pb(Ⅱ)选择性萃取中的应用

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摘要

A new solid phase extractant, sinapinaldehyde (SA) modified SBA-15 mesoporous silica, was developed for selective extraction and preconcentration of trace Pb(II) from aqueous solutions. The successful immobilization of SA on SBA-15 and the strong interaction between SA-SBA-15 and Pb(Ⅱ) were characterized and confirmed by FTIR spectroscopy and scanning electron microscopy. Parameters such as solution pH, shaking time, eluent condition and sample volume were optimized so that the maximum removal of Pb(Ⅱ) from solution could be achieved. At pH 4.0, the maximum adsorption capacity of the sorbent for Pb(Ⅱ) was found to be 33.6mg g~(-1) and the adsorbed Pb(Ⅱ) could be completely eluted using a mixed solution of 2 M HC1 and 5% CS(NH_2)_2. Some common metal ions such as K(Ⅰ), Na(Ⅰ), Mg(Ⅱ), Ca(Ⅱ), Cr(Ⅲ), Fe(Ⅲ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), Cd(Ⅱ) and Hg(Ⅱ) did not interfere with the adsorption of trace Pb(Ⅱ). The detection limit of the present method was found to be 1.3 ngm L~(-1) and the relative standard deviation was less than 2.0% (n = 8). These results suggested that this new sorbent is very efficient and selective for the removal of trace Pb(Ⅱ) in water samples.
机译:开发了一种新的固相萃取剂,新戊醛(SA)改性的SBA-15中孔二氧化硅,用于从水溶液中选择性萃取和预浓缩痕量Pb(II)。通过FTIR光谱和扫描电镜对SA成功固定在SBA-15上以及SA-SBA-15与Pb(Ⅱ)之间的强相互作用进行了表征。优化了溶液的pH值,振荡时间,洗脱条件和样品量等参数,以实现溶液中Pb(Ⅱ)的最大去除。在pH 4.0时,吸附剂对Pb(Ⅱ)的最大吸附容量为33.6mg g〜(-1),所吸附的Pb(Ⅱ)可用2 M HCl和5%的混合溶液完全洗脱。 CS(NH_2)_2。一些常见的金属离子,例如K(Ⅰ),Na(Ⅰ),Mg(Ⅱ),Ca(Ⅱ),Cr(Ⅲ),Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ) ,Zn(Ⅱ),Cd(Ⅱ)和Hg(Ⅱ)不干扰痕量Pb(Ⅱ)的吸附。本方法的检出限为1.3 ngm L〜(-1),相对标准偏差小于2.0%(n = 8)。这些结果表明,这种新型吸附剂对于去除水中的痕量Pb(Ⅱ)非常有效且具有选择性。

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  • 来源
  • 作者单位

    Department of Chemical Engineering, Curtin University, Perth, WA 6148, Australia;

    Department of Chemical Engineering, Curtin University, Perth, WA 6148, Australia;

    Australian Institute for Bioengineering and Nanotechnology (AIBN),University of Queensland, QLD 4072, Australia;

    Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn VIC 3122,Australia;

    Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn VIC 3122,Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mesoporous silica; sinapinaldehyde; lead(Ⅱ); surface modification;

    机译:介孔二氧化硅芥子醛铅(Ⅱ);表面改性;
  • 入库时间 2022-08-17 13:31:11

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