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钙化铁包埋碳珠对二价镉的吸附作用

Adsorption of divalent cadmium by calcified iron-embedded carbon beads.

作者信息

Cheng Yalin, Wang Kaiqian, Tu Biyang, Xue Shan, Deng Jiahui, Tao Haisheng

机构信息

Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, School of Environmental Science and Engineering, Anhui Normal University Wuhu 241000 Anhui China

Anhui Laboratory of Molecule-Based Materials, School of Chemistry and Materials Science, Anhui Normal University Wuhu 241000 Anhui China.

出版信息

RSC Adv. 2020 Feb 10;10(11):6277-6286. doi: 10.1039/c9ra10309k. eCollection 2020 Feb 7.

DOI:10.1039/c9ra10309k
PMID:35495986
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9049697/
Abstract

A novel iron-embedded carbon bead was prepared by the calcination of a calcium alginate gel bead mixed with iron nanoparticles coated by polydopamine. The prepared iron-embedded carbon bead was characterized by infrared spectrum analysis, X-ray diffraction, Raman spectroscopy, vibrating sample magnetometry, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. It was discovered that the novel structure efficaciously prevented the agglomeration of iron nanoparticles. Additionally, the effects of dose, pH, exposure time, temperature and initial concentration on the adsorption of Cd(ii) were studied, and the reusability of the material was analyzed. Fe/SA-C showed high Cd(ii) removal capability (220.3, 225.7, 240.8 mg g at 288, 298, 308 K), easy recoverability and high stability. In addition, some slightly different interpretations of the adsorption mechanism are given. This study clearly revealed that Fe/SA-C has potential application in the removal of Cd(ii).

摘要

通过煅烧与聚多巴胺包覆的铁纳米颗粒混合的海藻酸钙凝胶珠制备了一种新型的铁嵌入碳珠。通过红外光谱分析、X射线衍射、拉曼光谱、振动样品磁强计、X射线光电子能谱、扫描电子显微镜和透射电子显微镜对制备的铁嵌入碳珠进行了表征。发现这种新型结构有效地防止了铁纳米颗粒的团聚。此外，研究了剂量、pH值、暴露时间、温度和初始浓度对Cd(ii)吸附的影响，并分析了该材料的可重复使用性。Fe/SA-C表现出高的Cd(ii)去除能力（在288、298、308 K时分别为220.3、225.7、240.8 mg g）、易于回收和高稳定性。此外，还给出了对吸附机理的一些略有不同的解释。这项研究清楚地表明Fe/SA-C在去除Cd(ii)方面具有潜在应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/0e3844cfea03/c9ra10309k-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/939504fadf59/c9ra10309k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/0e3844cfea03/c9ra10309k-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/6dddf097eec3/c9ra10309k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/3cda7a677451/c9ra10309k-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/ed8db53a458e/c9ra10309k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/cd21b3acb024/c9ra10309k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/41c62def56ad/c9ra10309k-f5.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/939504fadf59/c9ra10309k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1038/9049697/0e3844cfea03/c9ra10309k-f8.jpg

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