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γ辐照下功能化介孔二氧化硅对放射性核素的去污作用

Decontamination of radionuclides by functionalized mesoporous silica under gamma irradiation.

作者信息

Iqbal Sajid, Yun Jong-Il

机构信息

Department of Nuclear and Quantum Engineering, KAIST 291 Daehak-ro, Yuseong-gu Daejeon 34141 Republic of Korea

Chemistry Division, Pakistan Institute of Nuclear Science and Technology P.O. Nilore Islamabad Pakistan.

出版信息

RSC Adv. 2018 Sep 18;8(56):32211-32220. doi: 10.1039/c8ra05939j. eCollection 2018 Sep 12.

DOI:10.1039/c8ra05939j
PMID:35547485
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9086197/
Abstract

Schiff base functionalized mesoporous silica (SA-SBA-15) was synthesized by the co-condensation method to remove the radioactive corrosion products from contaminated water coming from nuclear installations. SA-SBA-15 nanoparticles were first irradiated in a solid powder form and then applied to remove Cu(ii), Ni(ii), and Co(ii) from their aqueous mixture in the range from 0 to 1000 Gy of gamma irradiation. The FTIR, TGA, zeta potential, XRD, BET, TEM, and CHN analysis results revealed the stability of a ligand support material, mesopore ordering and the functional groups. The structural and functional group endurance under our studied gamma irradiation makes SA-SBA-15 a potential adsorbent for routine decontamination and decommissioning activities as well as in radioactively contaminated emergency scenarios. Furthermore, the adsorbent-metal complexation followed the Irving-Williams order (Cu(ii) > Ni(ii) > Co(ii)) and showed a higher selectivity for Cu(ii) with removal capacity up to 99.76 ± 0.01%, thus suggesting its applicability to separate Cu(ii) from other metal ions.

摘要

通过共缩聚法合成了席夫碱功能化介孔二氧化硅（SA-SBA-15），用于去除来自核设施的受污染水中的放射性腐蚀产物。首先以固体粉末形式对SA-SBA-15纳米颗粒进行辐照，然后将其应用于从0至1000 Gy的γ辐照范围内的Cu(ii)、Ni(ii)和Co(ii)的混合水溶液中去除这些离子。傅里叶变换红外光谱（FTIR）、热重分析（TGA）、zeta电位、X射线衍射（XRD）、比表面积分析（BET）、透射电子显微镜（TEM）和元素分析（CHN）结果揭示了配体载体材料的稳定性、介孔有序性和官能团。在我们研究的γ辐照下，结构和官能团的耐久性使SA-SBA-15成为常规去污和退役活动以及放射性污染应急场景中的潜在吸附剂。此外，吸附剂与金属的络合遵循欧文-威廉姆斯顺序（Cu(ii) > Ni(ii) > Co(ii)），对Cu(ii)表现出更高的选择性，去除能力高达99.76 ± 0.01%，因此表明其适用于从其他金属离子中分离出Cu(ii)。

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