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Removal of arsenic(v) from aqueous solutions using sulfur-doped Fe3O4 nanoparticles

机译：使用硫掺杂Fe3O4纳米颗粒从水溶液中除去砷（V）

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摘要

In this study, magnetic sulfur-doped Fe3O4 nanoparticles (Fe3O4:S NPs) were applied as adsorbents for the removal of As(v). Fe3O4:S NPs were fabricated by a two-step route, which included low-temperature mixing and high-temperature sintering. The as-prepared Fe3O4:S NPs could effectively remove As(v) under a wide pH range of 2-10 and presented a high As(v) adsorption capacity of 58.38 mg g(-1), which was much better than undoped Fe3O4 nanoparticles (20.24 mg g(-1)). Adsorption experiments exhibited a pseudo-second-order model of adsorption kinetics and a Langmuir isotherm model of adsorption isotherms. Additionally, the coexisting ions such as NO3-, SO42-, and CO32- had no significant effect on As(v) adsorption and the adsorbent worked well in actual smelting wastewater. XPS and FTIR spectra of Fe3O4:S NPs before and after As(v) adsorption showed that Fe-OH groups played a significant role in the adsorption mechanisms. Moreover, the magnetic Fe3O4:S NPs adsorbents after adsorption could be rapidly separated from wastewater with an external magnetic field. Therefore, Fe3O4:S NPs could be an ideal candidate for the removal of As(v) from water.
机译：在该研究中，将磁性硫 - 掺杂Fe3O4纳米颗粒（Fe 3 O 4：S NPS）作为吸附剂施加，以除去（V）。 Fe3O4：S NPS由两步途径制造，包括低温混合和高温烧结。制备的Fe3O4：S NPS可以在2-10的宽pH范围内有效地除去（v），并呈现高于（v）吸附能力为58.38mg g（-1），这比未掺杂的Fe3O4要好得多纳米颗粒（20.24mg（-1））。吸附实验表现出一种吸附动力学的伪二阶模型和吸附等温线的Langmuir等温模型。另外，共存离子如NO 3，SO42-和CO32-对（v）吸附而没有显着影响，并且在实际熔炼废水中井的吸附剂良好地工作。 Fe3O4的XPS和FTIR光谱：SAS（v）吸附之前和之后的NPS显示Fe-OH基团在吸附机制中发挥了重要作用。此外，磁Fe3O4：S NPS吸附剂在吸附后可以用外部磁场从废水迅速分离。因此，Fe3O4：S NPS可以是从水中移除AS（V）的理想候选者。

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  • 来源
    《RSC Advances》 |2018年第71期|共9页
  • 作者

    Liu Junhui; Kong Long; Huang Xueqiong; Liu Min; Li Liang;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Environm Sci &

    Engn 800 Dongchuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Environm Sci &

    Engn 800 Dongchuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Environm Sci &

    Engn 800 Dongchuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Environm Sci &

    Engn 800 Dongchuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Environm Sci &

    Engn 800 Dongchuan Rd Shanghai 200240 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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