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首页> 外文期刊>Environmental Science & Technology >EDTA-Cross-Linked β-Cydodextrin: An Environmentally Friendly Bifunctional Adsorbent for Simultaneous Adsorption of Metals and Cationic Dyes
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EDTA-Cross-Linked β-Cydodextrin: An Environmentally Friendly Bifunctional Adsorbent for Simultaneous Adsorption of Metals and Cationic Dyes

机译：EDTA交联的β-环糊精：一种同时吸附金属和阳离子染料的环保型双功能吸附剂

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摘要

The discharge of metals and dyes poses a serious threat to public health and the environment. What is worse, these two hazardous pollutants are often found to coexist in industrial wastewaters, making the treatment more challenging. Herein, we report an HDTA-cross-linked β-cyclodextrin (EDTA-β-CD) bifunctional adsorbent, which was fabricated by an easy and green approach through the polycondensation reaction of β-cydodextrin with EDTA as a cross-linker, for simultaneous adsorption of metals and dyes. In this setting, cydodextrin cavities are expected to capture dye molecules through the formation of inclusion complexes and EDTA units as the adsorption sites for metals. The adsorbent was characterized by FT-IR, elemental analysis, SEM, EDX, ζ-potential, and TGA. In a monocomponent system, the adsorption behaviors showed a monolayer adsorption capacity of 1.241 and 1.106 mmol g~(-1) for Cu(n) and Cd(n), respectively, and a heterogeneous adsorption capacity of 0.262, 0.169, and 0.280 mmol g~(-1) for Methylene Blue, Safranin O, and Crystal Violet, respectively. Interestingly, the Cu(Ⅱ)-dye binary experiments showed adsorption enhancement of Cu(Ⅱ), but no significant effect on dyes. The simultaneous adsorption mechanism was further confirmed by FT-IR, thermodynamic study, and elemental mapping. Overall, its facile and green fabrication, efficient sorption performance, and excellent reusability indicate that EDTA-β-CD has potential for practical applications in integrative and efficient treatment of coexistenting toxic pollutants.
机译：金属和染料的排放对公众健康和环境构成了严重威胁。更糟糕的是，这两种有害污染物通常被发现与工业废水共存，使处理更具挑战性。本文中，我们报告了一种HDTA交联的β-环糊精（EDTA-β-CD）双功能吸附剂，该吸附剂是通过一种简单的绿色方法通过β-环糊精与EDTA作为交联剂的缩聚反应而制备的。金属和染料的吸附。在这种情况下，环糊精腔有望通过形成包合物和EDTA单元捕获染料分子，作为金属的吸附位点。通过FT-IR，元素分析，SEM，EDX，ζ电位和TGA对吸附剂进行表征。在单组分体系中，吸附行为对Cu（n）和Cd（n）的单层吸附容量分别为1.241和1.106 mmol g〜（-1），非均相吸附容量为0.262、0.169和0.280 mmol亚甲基蓝，番红O和结晶紫分别为g〜（-1）。有趣的是，Cu（Ⅱ）-染料二元实验显示了对Cu（Ⅱ）的吸附增强，但对染料没有显着影响。 FT-IR，热力学研究和元素图谱进一步证实了同时吸附机理。总体而言，它的简便，绿色制造，高效的吸附性能以及出色的可重复使用性表明，EDTA-β-CD在整合和有效处理共存的有毒污染物方面具有实际应用潜力。

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  • 来源
    《Environmental Science & Technology》 |2015年第17期|10570-10580|共11页
  • 作者

    Feiping Zhao; Eveliina Repo; Dulin Yin; Yong Meng; Shila Jafari; Mika Sillanpaeae;

  • 作者单位

    Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland,National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, China;

    Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland;

    National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, China;

    National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, China;

    Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland;

    Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland;

  • 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);美国《化学文摘》(CA);
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