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首页> 外文期刊>Journal of Polymers and the Environment >Fabrication of PVA Nanofibers Grafted with Octaamino-POSS and their Application in Heavy Metal Adsorption
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Fabrication of PVA Nanofibers Grafted with Octaamino-POSS and their Application in Heavy Metal Adsorption

机译：用八氨基 - POSS接枝的PVA纳米纤维的制备及其在重金属吸附中的应用

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摘要

Wastewater treatment is one of the focuses in current society, and the removal of heavy metal ions from it is crucial in wastewater treatment. Polyvinyl alcohol (PVA) nanofibers play a certain role in the adsorption of heavy metal ions, but their adsorption capacity is limited. In this work, maleic anhydride (MAH) was first grafted onto the molecular chain of PVA. Then through the condensation of the carboxyl group and the amino group, the octaamino-POSS was successfully grafted on the PVA molecular chain. Two kinds of nanofibers, PVA/octaamino-POSS nanofibers as well as PVA-g-POSS nanofibers, were fabricated by electrospinning technology for the adsorption of Pb2+ and Cu2+ in wastewater. The preparation of PVA/octaamino-POSS was used to compare which metal ion adsorption process was more stable, physical blending or chemical grafting. With the increase of contact time, the adsorption capacity of PVA/octaamino-POSS nanofibers to Cu2+ increased at first and then decreased. It was observed that the adsorption capacity of PVA-g-POSS to heavy metal ions was higher than that of PVA/octaamino-POSS. With the increase of octaamino-POSS content, the equilibrium adsorption of Pb2+ and Cu2+ on PVA-g-POSS nanofibers was significantly improved, with prominent adsorption effect for Cu2+. Based on the analysis of quasi-first-order and quasi-second-order dynamic equation, it was deduced that the chemical adsorption and physical adsorption worked together in the adsorption process of Pb2+ and Cu2+ by PVA-g-POSS, and chemical adsorption played a major role.
机译：废水处理是当前社会的重点之一，并且从其中除去重金属离子在废水处理中至关重要。聚乙烯醇（PVA）纳米纤维在重金属离子的吸附中起一定的作用，但它们的吸附能力是有限的。在这项工作中，首先将马来酸酐（MAH）移植到PVA的分子链上。然后通过羧基和氨基的缩合，八氨基 - 足够成功接枝在PVA分子链上。通过静电纺丝技术制造两种纳米纤维，PVA /邻氨基 - 足纳纤维以及PVA-G-POTS纳米纤维，用于在废水中吸附PB2 +和Cu2 +。 PVA / octaamino-POSS的制备用于比较金属离子吸附过程更稳定，物理混合或化学接枝。随着接触时间的增加，PVA / octaamino-POSS纳米纤维的吸附容量首先增加，然后减少。观察到PVA-G-POSS与重金属离子的吸附能量高于PVA / octaamino-POSS的吸附能力。随着八氨基的含量的增加，PB2 +和Cu2 +对PVA-G-POLD纳米纤维的平衡吸附显着改善，具有突出的吸附效果对Cu2 +。基于对准一阶和准二阶动态方程的分析，推导出在PB2 +和Cu2 +的吸附过程中，通过PVA-G-POSS的吸附过程中的化学吸附和物理吸附，并发挥了化学吸附一个主要作用。

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  • 来源
    《Journal of Polymers and the Environment》 |2021年第5期|1566-1575|共10页
  • 作者

    He Yao; Tian Huafeng; Xiang Aimin; Wang Hailiang; Li Jinlong; Luo Xiaogang; Rajulu A. Varada;

  • 作者单位

    Beijing Technol & Business Univ Coll Chem & Mat Engn Beijing Key Lab Qual Evaluat Technol Hyg & Safety Beijing 100048 Peoples R China;

    Beijing Technol & Business Univ Coll Chem & Mat Engn Beijing Key Lab Qual Evaluat Technol Hyg & Safety Beijing 100048 Peoples R China|South China Univ Technol State Key Lab Pulp & Paper Engn Guangzhou 510640 Peoples R China;

    Beijing Technol & Business Univ Coll Chem & Mat Engn Beijing Key Lab Qual Evaluat Technol Hyg & Safety Beijing 100048 Peoples R China;

    Beijing Technol & Business Univ Coll Chem & Mat Engn Beijing Key Lab Qual Evaluat Technol Hyg & Safety Beijing 100048 Peoples R China;

    Beijing Technol & Business Univ Beijing Adv Innovat Ctr Food Nutr & Human Hlth Beijing 100048 Peoples R China;

    Wuhan Inst Technol Sch Chem Engn & Pharm Hubei Key Lab Novel Reactor & Green Chem Technol 693 Xiongchu Ave Wuhan 430073 Peoples R China|Zhengzhou Univ Sch Mat Sci & Engn 100 Sci Ave Zhengzhou 450001 Henan Peoples R China;

    Osmania Univ Dept Phys Polymer Composites Hyderabad India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Poly (vinyl alcohol); Electrospinning; Octaamino-POSS; Heavy metal adsorption;

    机译：聚（乙烯醇）;静电纺丝;八氨基 - POSS;重金属吸附;
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