Iodide adsorption from aqueous solutions using zirconium-containing anion exchange resin as an oxidizing resin: batch and column studies

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-06-17 DOI:10.1007/s13738-024-03014-w
Mona Akbari, Shahram Sharifnia
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Abstract

In the current study, a zirconium-containing anion exchange resin was synthesized as an oxidizing resin for iodide adsorption from aqueous solutions. The static adsorption capacity of the oxidizing resin was 612.86 mg/g (obtained from isotherm studies and the Langmuir model). This capacity was 31% higher than the capacity of counter parent resin for iodide adsorption. Adsorption performance of the oxidizing resin was close to maximal over a wide range of pHs (2–7), and the best results were obtained at pH = 3 (8.5% higher than the resin capacity in neutral pH). Iodide removal selectivity in the presence of three commonly encountered anions \({{\text{SO}}}_{4}^{2-}\), \({{\text{NO}}}_{3}^{-}\) and \({{\text{Cl}}}^{-}\) was improved. The iodide selectivity of oxidizing resin in the presence of \({{\text{Cl}}}^{-}\) ion was excellent. Breakthrough curves of both resins with and without encountered anions were fitted with common breakthrough curve models. The results were consistent with the results of the batch mood experiments. Pseudo-second-order kinetic was described kinetic behavior of both resins well. An iodide adsorption mechanism was proposed using the results of batch experiments and the resin characterizations (XPS and Raman spectra). The potential of oxidizing resin for iodide oxidation into iodine increased the capacity and selectivity of resin toward iodide ions.

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使用含锆阴离子交换树脂作为氧化树脂吸附水溶液中的碘化物:批处理和柱研究
本研究合成了一种含锆阴离子交换树脂,作为从水溶液中吸附碘化物的氧化树脂。氧化树脂的静态吸附容量为 612.86 mg/g(根据等温线研究和 Langmuir 模型得出)。该吸附容量比反母体树脂的碘化物吸附容量高出 31%。氧化树脂的吸附性能在很宽的 pH 值范围(2-7)内都接近最大值,在 pH = 3 时吸附效果最好(比中性 pH 值时的吸附能力高 8.5%)。在存在三种常见阴离子({{text{SO}}}_{4}^{2-}/)、({{text{NO}}}_{3}^{-}/)和({{text{Cl}}}^{-}/)的情况下,碘化物的去除选择性有所提高。在 \({{text{Cl}}^{-}\) 离子存在下,氧化树脂的碘化物选择性非常好。用常见的突破曲线模型拟合了有阴离子和无阴离子两种树脂的突破曲线。结果与批量情绪实验结果一致。伪二阶动力学很好地描述了两种树脂的动力学行为。利用批次实验结果和树脂表征(XPS 和拉曼光谱)提出了碘化物吸附机理。氧化树脂将碘氧化成碘的潜力提高了树脂对碘离子的吸附能力和选择性。
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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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