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首页> 外文期刊>RSC Advances >Preparation of neutral red functionalized Fe3O4@SiO2 and its application to the magnetic solid phase extraction of trace Hg(II) from environmental water samples
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Preparation of neutral red functionalized Fe3O4@SiO2 and its application to the magnetic solid phase extraction of trace Hg(II) from environmental water samples

机译：中性红色官能化Fe3O4 @ SiO2的制备及其在环境水样中痕量HG（II）的磁固相萃取

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摘要

In this work, for the first time, neutral red functionalized Fe3O4@SiO2 was prepared, characterized and subsequently used for magnetic solid phase extraction of Hg(II) from environmental water samples followed by inductively coupled plasma-mass spectrometry determination. TEM images shows uniform decoration of SiO2 on the Fe3O4 surface (with a typical particle size of 220 nm). The FT-IR analysis indicates that neutral red was combined with the SiO2 surface by chemical bonds. Trace levels of Hg(II) can be extracted efficiently and selectively due to the electrostatic and coordinate interactions of Hg(II) and neutral red. Parameters affecting the quantitative recovery of Hg(II) were investigated, and the optimized values were 6.0, 25 mg, 60 min, and 5 mL of 1.0 mol L-1 HNO3 for pH value of the solution, amount of the extractant, equilibration time and volume, concentration of eluent, respectively. Under the optimized conditions, at Hg(II) concentrations as low as 2 ng mL(-1), the recovery is >85%, and the enrichment factor is as high as 100. The commonly encountered ions show no interference with the extraction process. The material can be regenerated and reused at least ten times without loss of adsorption capacity (84 mg g(-1)). In addition, magnetic separation greatly simplifies the extraction procedure and filtration and/or centrifugation processes were avoided. The material was successfully applied for the separation and pre-concentration of low levels of Hg(II) in environmental water samples with satisfactory results.
机译：在这项工作中，首次制备中性红色官能化Fe3O4 @ SiO 2，其特征在于，随后用于从环境水样中的Hg（II）的磁性固相提取，然后是电感耦合等离子体质谱法测定。 TEM图像显示Fe3O4表面上的SiO2均匀装饰（典型粒度为220nm）。 FT-IR分析表明中性红色通过化学键与SiO 2表面组合。由于HG（II）的静电和坐标相互作用和中性红色，可以有效且选择性地提取HG（II）的痕量HG（II）。研究了影响HG（II）的定量回收的参数，优化值为6.0,25mg，60分钟，5ml 1.0mol L-1 HNO3，用于溶液的pH值，提取剂的量，平衡时间和体积，产量分别浓缩。在优化条件下，在Hg（ii）浓度低至2ng ml（-1），回收率> 85％，富集因子高达100.通常遇到的离子没有干扰萃取过程干扰。可以再生材料并在不损失吸附容量（84mg（-1））的情况下重新生成并重新使用。另外，磁性分离极大地简化了萃取过程和过滤和/或离心过程。该材料成功地应用于环境水样中的低水平HG（II）的分离和预浓度，结果令人满意。

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  • 来源
    《RSC Advances》 |2016年第89期|共8页
  • 作者

    Wu Chunlai; Zhu Guifen; Fan Jing; Wang Jianji;

  • 作者单位

    Henan Normal Univ Sch Environm Henan Key Lab Environm Pollut Control Minist Educ Key Lab Yellow River &

    Huai River Water Environm Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Henan Key Lab Environm Pollut Control Minist Educ Key Lab Yellow River &

    Huai River Water Environm Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Henan Key Lab Environm Pollut Control Minist Educ Key Lab Yellow River &

    Huai River Water Environm Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Chem &

    Chem Engn Key Lab Green Chem Media &

    React Minist Educ Xinxiang 453007 Henan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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