不同阳离子交换沸石对捕获CH3I保护环境的影响研究

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2025-08-20 DOI:10.1016/j.pnucene.2025.105983

Talhat Yaqoob , Masroor Ahmad , Mohammod Hafizur Rahman , Farman Ali , Amjad Farooq , Mohammad Shahedur Rahman

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引用次数: 0

摘要

核电厂潜在事故中放射性碘化甲酯（CH3I）的释放对公众健康和环境安全构成重大威胁。本研究推荐了一种利用阳离子（即Ag、Ni、Cu和Zn）交换的沸石捕获NPP产生的CH3I的新材料。在与核设施有关的条件下，已用上述材料对捕获CH3I进行了测试。使用SEM-EDX、XRD、AAS和BET等多种技术对原始样品和改性样品进行了表征，以揭示它们的形态、结晶度和化学成分。通过突破性实验评价了改性沸石材料对非放射性碘化甲酯（CH3I）气体（100 ppm）的吸附性能。采用紫外可见光谱技术对样品进行分析。研究了气态非放射性CH3I在沸石（13X分子筛）表面的吸附性能。突破曲线表明，Ag和ni改性的沸石性能优于其他金属改性的沸石。CH3I捕获效率的顺序为：Ag >； Ni > Cu > Zn。在恶劣条件下，CH3I的最大去除率可达627 mg/g。此外，采用Yoon-Nelson和Thomas动态吸附模型研究了CH3I在改性沸石表面的吸附机理。此外，负吉布斯自由能（ΔG）证实了吸附过程是自发和放热的，证实了它们在研究条件下的热力学有利性。

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Investigation of the effect of different cations exchanged zeolite for the capture of CH3I for protection of environment

The release of radioactive methyl iodide (CH₃I) during potential accidents at nuclear power plants poses a significant threat to public health and environmental safety. This study recommends a novel material for the capturing of CH₃I emanating from a NPP using cations (i.e. Ag, Ni, Cu and Zn) exchanged zeolite. The capturing of CH₃I under conditions relevant to nuclear facilities has been tested with the said material. Raw and modified samples were characterized using several techniques, including SEM-EDX, XRD, AAS, and BET, to reveal their morphology, crystallinity, and chemical composition. Adsorption performance of the modified zeolite materials for non-radioactive methyl iodide (CH₃I) gas (100 ppm) was evaluated through breakthrough experiments. The UV–visible spectroscopy technique was used for the analysis of the samples. The adsorption performance of gaseous non-radioactive CH₃I on the surface of zeolite (13X molecular sieve) was evaluated. Breakthrough curves showed that the performance of Ag and Ni-modified zeolite was better than other metal-modified samples. The efficiency of CH₃I capturing follows this order: Ag > Ni > Cu > Zn. Moreover, the maximum removal efficiency of CH₃I was obtained up to 627 mg/g under severe conditions. Additionally, adsorption mechanisms of CH₃I on the surface of modified zeolite were investigated using the Yoon–Nelson and Thomas dynamic adsorption models. Furthermore, the negative Gibbs free energy (ΔG) confirmed that the adsorption processes were spontaneous and exothermic in nature, confirming their thermodynamic favorability under the studied conditions.

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.