Adsorption of uranium by amination mesoporous molecular sieve HMS, using response surface methodology

IF 2.3 4区工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY

Separation Science and Technology Pub Date : 2023-05-24 DOI:10.1080/01496395.2023.2214308

Tianwei Peng, Yanfei Wang

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引用次数: 0

Abstract

ABSTRACT In this study, amino modified mesoporous silica (HMS-TEEPA-TEA) was used for the first time to remove uranium (VI) from aqueous solution. The synthesized HMS-TEEPA-TEA was characterized by SEM, EDS, FTIR, BET and XPS techniques. The present work attempted to optimize and compare the adsorption process parameters like pH, adsorbate concentration, and adsorbent dose using Box-Behnken designs of response surface methodology. The adsorption amount and removal rate reached 337.26 mg/g and 99.57%, respectively. Model P> F < 0.0001 in this experiment (generally P > F < 0.05 is considered significant), indicating that the model is extremely significant and can be considered as highly referable for its predicted response values. The fit of the data to the Langmuir isotherm and the proposed secondary kinetics indicates that the adsorption process is monolayer and chemical in nature. The effect of copper on HMS-TEEPA-TEA adsorption is more complex than other background ions. The removal of uranium (VI) by HMS-TEEPA-TEA remained above 80% for four consecutive experiments with repeated adsorbent use. The results indicate that HMS-TEEPA-TEA is an effective adsorbent for the removal of uranium (VI) from aqueous solutions with the advantages of low cost, high availability and easy production.

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胺化介孔分子筛HMS吸附铀的响应面法

摘要本研究首次采用氨基修饰介孔二氧化硅(hms - tepa - tea)去除水溶液中的铀(VI)。采用SEM、EDS、FTIR、BET和XPS等技术对合成的hms - tepa - tea进行了表征。本研究尝试利用响应面法的Box-Behnken设计对pH、吸附质浓度、吸附剂剂量等吸附过程参数进行优化比较。吸附量和去除率分别达到337.26 mg/g和99.57%。认为模型P> F F < 0.05显著)，说明该模型极显著，可认为其预测的响应值具有较高的参考价值。Langmuir等温线和二级动力学的拟合表明，吸附过程是单层的，是化学性质的。铜对hms - tepa - tea吸附的影响比其他背景离子更为复杂。在重复使用吸附剂的情况下，HMS-TEEPA-TEA对铀(VI)的去除率连续4次保持在80%以上。结果表明，HMS-TEEPA-TEA具有成本低、可得性高、易于生产等优点，是一种去除水中铀(VI)的有效吸附剂。

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来源期刊

Separation Science and Technology 工程技术-工程：化工

CiteScore

6.10

自引率

3.60%

发文量

131

审稿时长

5.7 months

期刊介绍： This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.