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水溶液中锶微量元素在负载聚丙烯腈聚合物的MnO-ZrO上的吸附行为。

Adsorption behavior of trace elements of Sr on MnO-ZrO loaded with polyacrylonitrile polymer from aqueous solutions.

作者信息

Akbari Neda, Ahmadi Seyed Javad, Pourmatin Akram, Heydari Mehran, Shiri-Yekta Zahra

机构信息

Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran.

出版信息

Sci Rep. 2023 Nov 22;13(1):20500. doi: 10.1038/s41598-023-48010-x.

DOI:10.1038/s41598-023-48010-x
PMID:37993597
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10665401/
Abstract

A MnO-ZrO-polyacrylonitrile (MnO-ZrO-PAN) composite ion exchanger was produced and its properties were examined by Fourier-transformed infrared spectroscopy, scanning electron microscopy, The BET (Brunauer, Emmett and Teller) surface area, X-Ray diffraction analysis and thermogravimetric analysis. The adsorption of Strontium (Sr) from solutions by MnO-ZrO-PAN composite was studied thru batch experiments. The distribution Coefficient of Sr (II) on the composite sorbent was investigated against pH, interaction time, and primary concentration ion. To study the kinetics of adsorption, Pseudo-first-order and Pseudo second-order adsorption kinetics were studied and the results revealed that adsorption kinetics better fit to the pseudo-second-order model. Three iso-temperature models, Langmuir, Freundlich, and Temkin were applied to fit the experimental results. Among those models, Langmuir revealed the most suitable one with minimum deviation. The created composite exhibited strong compatibility to the elimination of Y (III), Ni (II), Pb (II), and Co (II) from radioactive waste streams. On the other, it is evident from the data that the quantifiable extraction of Sr (II) ions from Zr (IV), Mo (VI), and La (III) is feasible. MnO-ZrO Loaded with (PAN) Polymer was figured out to have high ion exchange capacity and thermal stability and selectivity for strontium.

摘要

制备了一种MnO-ZrO-聚丙烯腈（MnO-ZrO-PAN）复合离子交换剂，并通过傅里叶变换红外光谱、扫描电子显微镜、BET（布鲁瑙尔、埃米特和泰勒）比表面积、X射线衍射分析和热重分析对其性能进行了研究。通过批量实验研究了MnO-ZrO-PAN复合材料对溶液中锶（Sr）的吸附。研究了Sr（II）在复合吸附剂上的分配系数与pH值、相互作用时间和初始离子浓度的关系。为了研究吸附动力学，研究了准一级和准二级吸附动力学，结果表明吸附动力学更符合准二级模型。应用了三种等温模型，即朗缪尔、弗伦德利希和坦金模型来拟合实验结果。在这些模型中，朗缪尔模型显示出最合适且偏差最小。所制备的复合材料对从放射性废物流中去除Y（III）、Ni（II）、Pb（II）和Co（II）具有很强的兼容性。另一方面，从数据中可以明显看出，从Zr（IV）、Mo（VI）和La（III）中定量提取Sr（II）离子是可行的。负载（PAN）聚合物的MnO-ZrO被认为具有高离子交换容量、热稳定性和对锶的选择性。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/80d2a7e4aa07/41598_2023_48010_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/59d909b692c1/41598_2023_48010_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/783bdb355da6/41598_2023_48010_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/ef9030f5bc0b/41598_2023_48010_Fig9_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/625ed580424b/41598_2023_48010_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/91105684c2af/41598_2023_48010_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b6/10665401/5f5a1eee1bc4/41598_2023_48010_Fig13_HTML.jpg

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