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首页> 外文期刊>Journal of Hazardous Materials >Rapid removal of copper with magnetic poly-acrylic weak acid resin: Quantitative role of bead radius on ion exchange
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Rapid removal of copper with magnetic poly-acrylic weak acid resin: Quantitative role of bead radius on ion exchange

机译：磁性聚丙烯酸酯弱酸树脂快速去除铜：磁珠半径对离子交换的定量作用

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摘要

A novel magnetic weak acid resin NDMC was self-synthesized for the removal of Cu~(2+) from aqueous solutions. NDMC showed superior properties on the removal of Cu~(2+) compared to commercial resins C106 and IRC-748, which was deeply investigated by adsorption isotherms and kinetic tests. The equilibrium adsorption amount of Cu~(2+) onto NDMC (267.2 mg/g) was almost twice as large as that onto IRC-748 (120.0 mg/g). The adsorption kinetics of Cu~(2+) onto the three resins fitted well with the pseudo-second-order equation. The initial adsorption rate h of NDMC was about 4 times that of C106 and nearly 8 times that of IRC-748 at the initial concentration of 500 mg/L. External surface area was determined to be the key factor in rate-controlling by further analyzing the adsorption thermodynamics, kinetics parameters and physicochemical properties of the resins. NDMC resin with the smallest bead radius possessed the largest external surface and therefore exhibited the fastest kinetics. The adsorption amount of Cu~(2+) onto NDMC was not influenced as the concentration of Na~+ increased from 1.0 to 10.0 mM/L. Dilute HCl solution could effectively desorb Cu~(2+). NDMC demonstrated high stability during 10 adsorption/desorption cycles, showing great potential in the rapid removal of Cu~(2+) from wastewater.
机译：一种新型的磁性弱酸性树脂NDMC可自合成，用于从水溶液中去除Cu〜（2+）。与商业树脂C106和IRC-748相比，NDMC在去除Cu〜（2+）方面表现出优异的性能，这已通过吸附等温线和动力学测试进行了深入研究。 Cu〜（2+）在NDMC（267.2 mg / g）上的平衡吸附量几乎是IRC-748（120.0 mg / g）的两倍。 Cu〜（2+）在三种树脂上的吸附动力学符合拟二级方程。在初始浓度为500 mg / L时，NDMC的初始吸附率h约为C106的4倍，约为IRC-748的8倍。通过进一步分析树脂的吸附热力学，动力学参数和理化性质，确定外表面积是控制速率的关键因素。磁珠半径最小的NDMC树脂具有最大的外表面，因此表现出最快的动力学。由于Na〜+的浓度从1.0增加到10.0 mM / L，Cu〜（2+）在NDMC上的吸附量不受影响。稀盐酸溶液可以有效地解吸Cu〜（2+）。 NDMC在10个吸附/解吸循环中显示出很高的稳定性，显示了从废水中快速去除Cu〜（2+）的巨大潜力。

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  • 来源
    《Journal of Hazardous Materials》 |2014年第15期|102-111|共10页
  • 作者

    Lichun Fu; Chendong Shuang; Fuqiang Liu; Aimin Li; Yan Li; Yang Zhou; Haiou Song;

  • 作者单位

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

    State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China;

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

    Magnetic weak acid resin; Rapid removal; Bead radius; Regeneration; Copper;

    机译：磁性弱酸树脂;快速清除;磁珠半径;再生;铜;

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