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首页> 外文期刊>RSC Advances >Amphoteric starch derivatives as reusable flocculant for heavy-metal removal
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Amphoteric starch derivatives as reusable flocculant for heavy-metal removal

机译：两性淀粉衍生物作为可重复使用的重金属去除絮凝剂

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摘要

A pH-responsive amphoteric starch derivative (PRAS) bearing dual functional groups (amino and carboxyl groups) was prepared through etherification of starch with 2-chloro-4,6-diglycino-[1,3,5]-triazine. PRAS exhibits a reversible pH-response property in aqueous solution. The attractive property of PRAS is that it could be used as an effective flocculant for heavy metal-ion (e.g. Cu(II) and Zn(II)) removal from wastewater by changing pH. The transition of hydrophobicity-hydrophilicity would produce shrinkage of the polymer matrix, facilitating the release of heavy-metal ions from the saturated flocculant. As an ideal flocculant PRAS displayed outstanding stability and reproducibility, whose remove rate for Cu(II) and Zn(II) remained at 93% and 91% after three flocculation/regeneration cycles.
机译：通过用2-氯-4,6-二甘油 - [1,3,5] - 三嗪的乙酸醚化制备轴承双官能团（氨基和羧基）的pH-响应两性淀粉衍生物（PRA）。 PRA在水溶液中表现出可逆的pH-反应性质。 PRAS的有吸引力的特性是它可以用作重金属离子的有效絮凝剂（例如Cu（II）和Zn（II））通过改变pH从废水中除去。 疏水性 - 亲水性的过渡将产生聚合物基质的收缩，促进来自饱和絮凝剂的重金属离子的释放。 由于理想的絮凝剂PRA显示出出色的稳定性和再现性，其在三个絮凝/再生循环后，Cu（II）和Zn（II）的去除率保持在93％和91％。

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  • 来源
    《RSC Advances》 |2018年第3期|共7页
  • 作者

    Wu Liang; Zhang Xingrong; Chen Long; Zhang Huan; Li Chengbi; Lv Yin; Xu Yisheng; Jia Xin; Shi Yulin; Guo Xuhong;

  • 作者单位

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    State Key Lab Mineral Proc Beijing 102628 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    State Key Lab Mineral Proc Beijing 102628 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

    Shihezi Univ Sch Chem &

    Chem Engn Key Lab Green Proc Chem Engn Xinjiang Bingtuan Shihezi 832003 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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