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Preparation and application synthesis of magnetic nanocomposite using waste toner for the removal of Cr(VI)

机译：废调色剂中磁纳米复合物的制备及应用合成CR（VI）的去除

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摘要

In this study, a novel magnetic nanocomposite was prepared using waste toner (WT) through high temperature decomposition, and calcination was conducted in different atmospheres (air, ammonia, and vacuum). WT calcined in ammonia (WT(NH3)), and it was then utilized as an efficient absorbent for the reduction of Cr(VI) in aqueous solutions; a batch experiment with different conditions was performed to investigate its Cr(VI) removal ability. The effects of two pH-regulating acid (HCl and H2SO4) treatments were also studied. It was found that WT(NH3) could remove about 99% Cr(VI) at pH 2 under H2SO4 treatment. The XRD and TEM results coupled with VSM results confirmed that WT(NH3) is an Fe3O4/Fe2N nanohybrid, which possesses excellent water-dispersibility and remarkable magnetic properties. XPS analysis showed the presence of Cr(VI) and Cr(III) on the surface of WT(NH3), which indicated that Cr(VI) was reduced to Cr(III). Furthermore, H2SO4 regulation also promoted the reduction of Cr(VI) by WT(NH3), and this reduction was higher than that obtained by HCl regulation.
机译：在该研究中，通过高温分解使用废调色剂（WT）制备新的磁性纳米复合材料，并在不同的大气（空气，氨和真空）中进行煅烧。在氨中煅烧（WT（NH3）），然后用作在水溶液中还原Cr（VI）的有效吸收剂;进行具有不同条件的批次实验以研究其Cr（VI）去除能力。还研究了两种pH调节酸（HCl和H 2 SO 4）处理的影响。发现WT（NH3）在H 2 SO 4处理下可以在pH 2下除去约99％Cr（VI）。 XRD和TEM结果与VSM结果偶联证实，WT（NH3）是Fe3O4 / Fe2N纳米纳米嗜含量，其具有优异的水分散性和显着的磁性。 XPS分析显示WT（NH3）表面上的Cr（VI）和Cr（III）的存在，表明Cr（VI）还原为Cr（III）。此外，H 2SO4调节还通过WT（NH 3）促进Cr（VI）的还原，并且该还原比HCl调节所获得的降低。

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  • 来源
    《RSC Advances》 |2018年第49期|共7页
  • 作者

    Zhu Hong; Zhou Yucheng; Wang Shengsen; Wu Xiaoge; Hou Jianhua; Yin Weiqin; Feng Ke; Wang Xiaozhi; Yang Jie;

  • 作者单位

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Minist Agr Key Lab Crop &

    Livestock Integrat Nanjing 210095 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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