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首页> 外文期刊>RSC Advances >Magnetically recoverable mesoporous melamine-formaldehyde nanoparticles as an efficient adsorbent for hexavalent chromium removal
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Magnetically recoverable mesoporous melamine-formaldehyde nanoparticles as an efficient adsorbent for hexavalent chromium removal

机译：磁性可回收的介孔三聚氰胺 - 甲醛纳米颗粒作为高六价去除的有效吸附剂

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摘要

Functional porous nanoparticles have been considered as potential adsorbents for chromium (Cr) removal due to their unique properties such as high surface area, nanosized structure and specific affinity for heavy metal ions. Among these adsorbents, magnetic supports are one of the most efficient adsorbents for their unique advantages of easy separation under external magnetic fields. In this study, magnetic mesoporous melamine-formaldehyde (MMMF) nanoparticles with high surface area (393 m(2) g(-1)), uniform pore sizes (6.9 nm), and relatively high saturation magnetization (4.3 emu per g) have been prepared. These MMMF nanoparticles are highly effective in removing toxic hexavalent chromium (Cr(VI)) from water within 5 to 10 min. More importantly, they can be easily regenerated by a simple basic treatment (0.1 M NaOH) and reused at least five times. The effects of initial Cr(VI) concentration, temperature and pH on the adsorption properties of MMMF are also investigated. The superior adsorption properties of MMMF make them an attractive adsorbent for water quality purification and improvement.
机译：功能性多孔纳米颗粒被认为是铬（Cr）除去的潜在吸附剂由于它们的独特性质，例如高表面积，纳米结构和对重金属离子的特异性亲和力。在这些吸附剂中，磁性支撑件是最有效的吸附剂之一，用于在外部磁场下容易分离的独特优点。在本研究中，磁性介孔三聚氰胺 - 甲醛（MMMF）具有高表面积（393m（2）G（-1）），均匀的孔径（6.9nm）和相对高饱和磁化强度（每G的4.3欧u）准备好了。这些MMMF纳米颗粒非常有效地从5至10分钟内从水中除去毒性六价铬（Cr（VI））。更重要的是，它们可以通过简单的基本治疗（0.1米NaOH）轻松再生，并至少重复使用五次。还研究了初始Cr（VI）浓度，温度和pH对MMMF的吸附性能的影响。 MMMF的优异吸附性能使其成为水质净化和改善的有吸引力的吸附剂。

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  • 来源
    《RSC Advances》 |2015年第102期|共7页
  • 作者

    Lv Zhongfei; Zhao Dandan; Liang Changsheng; Cui Jiayang; Cai Yangben; Xu Shiai;

  • 作者单位

    E China Univ Sci &

    Technol Shanghai Key Lab Adv Polymer Mat Sch Mat Sci &

    Engn Key Lab Ultra Fine Mat Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Sch Chem &

    Mol Engn Chem Expt Ctr Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Adv Polymer Mat Sch Mat Sci &

    Engn Key Lab Ultra Fine Mat Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Adv Polymer Mat Sch Mat Sci &

    Engn Key Lab Ultra Fine Mat Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Adv Polymer Mat Sch Mat Sci &

    Engn Key Lab Ultra Fine Mat Minist Educ Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Adv Polymer Mat Sch Mat Sci &

    Engn Key Lab Ultra Fine Mat Minist Educ Shanghai 200237 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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