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Polyethyleneimine for copper absorption II: kinetics, selectivity and efficiency from seawater

机译：用于铜吸收的聚乙烯亚胺II：海水中的动力学，选择性和效率

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摘要

Glutaraldehyde (GA) cross-linked polyethyleneimine (PEI) coatings have previously been reported to effectively and selectively take up copper from seawater relevant concentrations in artificial seawater. We evaluate the copper uptake of such coatings from natural seawater. X-ray photoelectron spectroscopy elemental analysis revealed the coatings to be highly efficient and equally selective for copper uptake in natural seawater, reaching a maximum copper loading of 2 wt% in 48 hours. Similar to observations in artificial seawater we found that zinc was initially accumulated in the coatings, but was exchanged by copper over time. We investigate the spatial distribution of copper in the coatings by time-of-flight secondary ion mass spectrometry (ToF-SIMS), which revealed that copper was evenly distributed in the coating, with the exception of lower concentrations at the coating-water interface. We use synchrotron X-ray absorption studies and Fourier transform infrared (FTIR) spectroscopy to show that the copper-ligand interaction was mediated by Schiff's bases (imines).
机译：先前据报道，戊二醛（GA）交联聚乙烯亚胺（PEI）涂层有效，并选择性地从人工海水中的海水相关浓度上占用铜。我们评估了自然海水中这种涂层的铜吸收。 X射线光电子能谱元素分析显示，在天然海水中铜吸收的涂层高效，同样选择性，在48小时内达到2wt％的最大铜负荷。类似于人造海水中的观察结果，我们发现锌最初在涂层中积聚，但随着时间的推移通过铜交换。我们通过飞行时间二次离子质谱（TOF-SIM）来研究涂层中铜的空间分布，这揭示铜均匀分布在涂层中，除涂层水界面下较低浓度。我们使用Synchrotron X射线吸收研究和傅里叶变换红外（FTIR）光谱，表明铜配体相互作用是由Schiff的基础（亚胺）介导的。

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  • 来源
    《RSC Advances》 |2015年第64期|共8页
  • 作者

    Linden Johan B.; Larsson Mikael; Kaur Simarpreet; Skinner William M.; Miklavcic Stanley J.; Nann Thomas; Kempson Ivan M.; Nyden Magnus;

  • 作者单位

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Phen &

    Bioinformat Res Ctr Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

    Univ S Australia Ian Wark Res Inst Mawson Lakes SA 5095 Australia;

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  • 正文语种 eng
  • 中图分类 化学;
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