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铜吸附对藻酸钠珠中嵌入的氧化铁磁性纳米颗粒的影响。

The Effect of Copper Adsorption on Iron Oxide Magnetic Nanoparticles Embedded in a Sodium Alginate Bead.

作者信息

Modestino Michele, Galluzzi Armando, Barozzi Marco, Copelli Sabrina, Daniele Francesco, Russo Eleonora, Sieni Elisabetta, Sgarbossa Paolo, Lamberti Patrizia, Polichetti Massimiliano

机构信息

Department of Physics, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy.

Science and High Technology Department, Insubria University, Via Valleggio 11, 22100 Como, Italy.

出版信息

Nanomaterials (Basel). 2025 Aug 5;15(15):1196. doi: 10.3390/nano15151196.

DOI:10.3390/nano15151196
PMID:40801734
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12348931/
Abstract

The preparation and use of iron oxide magnetic nanoparticles for water remediation is a widely investigated research field. To improve the efficacy of such nanomaterials, different synthetic processes and functionalization methods have been developed in the framework of green chemistry to exploit their magnetic properties and adsorption capacity in a sustainable way. In this work, iron oxide magnetic nanoparticles embedded in cross-linked sodium alginate beads designed to clean water from metal ions were magnetically characterized. In particular, the effect of copper adsorption on their magnetic properties was investigated. The magnetic characterization in a DC field of the beads before adsorption showed the presence of a superparamagnetic state at 300 K-a state that was also preserved after copper adsorption. The main differences in terms of magnetic properties before and after Cu adsorption were the reduction of the magnetic signal (observed by comparing the saturation magnetization) and a different shape of the blocking temperature distribution obtained by magnetization versus temperature measurements. The evaluation of the reduction in magnetization can be important from the application perspective since it can affect the efficiency of the beads' removal from the water medium after treatment.

摘要

用于水修复的氧化铁磁性纳米颗粒的制备和应用是一个受到广泛研究的领域。为了提高此类纳米材料的功效，在绿色化学框架下已开发出不同的合成工艺和功能化方法，以可持续的方式利用其磁性和吸附能力。在这项工作中，对嵌入交联海藻酸钠珠粒中用于去除水中金属离子的氧化铁磁性纳米颗粒进行了磁性表征。特别地，研究了铜吸附对其磁性的影响。吸附前珠粒在直流场中的磁性表征显示在300 K时存在超顺磁状态，铜吸附后该状态也得以保留。铜吸附前后磁性的主要差异在于磁信号的降低（通过比较饱和磁化强度观察到）以及通过磁化强度与温度测量得到的阻塞温度分布形状不同。从应用角度评估磁化强度的降低可能很重要，因为它会影响处理后珠粒从水介质中去除的效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/b1a76f99e158/nanomaterials-15-01196-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/93d015b5180c/nanomaterials-15-01196-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/1b35995d5a69/nanomaterials-15-01196-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/7d41236b0d00/nanomaterials-15-01196-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/44a036e6558f/nanomaterials-15-01196-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/2b39a239d38a/nanomaterials-15-01196-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/1951f27dd1b2/nanomaterials-15-01196-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/b1a76f99e158/nanomaterials-15-01196-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/93d015b5180c/nanomaterials-15-01196-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/77c724ae1db2/nanomaterials-15-01196-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/1b35995d5a69/nanomaterials-15-01196-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/7d41236b0d00/nanomaterials-15-01196-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/44a036e6558f/nanomaterials-15-01196-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/2b39a239d38a/nanomaterials-15-01196-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/1951f27dd1b2/nanomaterials-15-01196-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/136e/12348931/b1a76f99e158/nanomaterials-15-01196-g008.jpg

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Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review.
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