Flash combustion prepared Sm and Co doped Sr hexaferrite for environmental applications

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL Adsorption Pub Date : 2024-09-21 DOI:10.1007/s10450-024-00532-0

Mai M. El-Masry, Rania Ramadan

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Abstract

Nanotechnology is offering solutions to water contamination issues, as new techniques are needed to improve the removal of harmful compounds from water bodies. Despite previous reviews on this topic, nanotechnology is paving the way for more effective water treatment methods. Understanding the substitute influence of divalent Co²⁺ and rare earth elements Sm³⁺ on the structure, magnetic, and removal efficiency of hexagonal ferrites requires an understanding of a sequence of SrFe₁₂O₁₉, SrFe_11.5Co_0.5O₁₉, Sr_0.95Sm_0.05Fe₁₂O₁₉, and Sr_0.95Sm_0.05Fe_11.5Co_0.5O₁₉ M-type hexagonal ferrites were prepared using the flash technique. The XRD examination revealed that the crystallized material formed a single M-type hexagonal phase. The characteristics of M-type hexagonal ferrites include absorption bands with low wavenumbers in the FTIR curves between 400 to 1000 cm⁻¹. There was a variation in magnetic characteristics with the replacement of Sm³⁺ and Co²⁺ doping, possibly due to the spin canting impact created by rare earth Sm³⁺ and Co²⁺ ions. The goal of the research is to explore the potential of doping magnetic hexaferrites and its influence in wastewater treatment. Various parameters, such as pH and contact duration, that influence the adsorption of lead ions from aqueous solutions were also examined. At pH 7 and 25 °C after 70min, the maximal removal efficiency of the Sr_0.95Sm_0.05Fe_11.5Co_0.5O₁₉ was found to be 99%. Magnetic separation was carried out by applying an external magnetic field using a permanent magnet. The strong magnetization of the ferrites (51–58 emu/g) enabled the rapid separation of the magnetic particles from the solution, with over 95% of the ferrite particles being recovered within 10 to 70 min. The Freundlich isotherm model fitted all the isotherm data. Adsorption kinetics were explained by the pseudo-first-order, pseudo-second order, and intraparticle diffusion models. The investigated samples’ adsorption capacity remained efficient till 5 cycles.

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用于环境应用的闪燃制备掺杂 Sm 和 Co 的硒六价铁氧体

纳米技术正在为水污染问题提供解决方案，因为需要新技术来改善水体中有害化合物的去除。尽管以前对这一主题进行过评论，但纳米技术正在为更有效的水处理方法铺平道路。要了解二价 Co2+ 和稀土元素 Sm3+ 对六方铁氧体的结构、磁性和去除效率的替代影响，需要了解采用闪速技术制备的 SrFe12O19、SrFe11.5Co0.5O19、Sr0.95Sm0.05Fe12O19 和 Sr0.95Sm0.05Fe11.5Co0.5O19 M 型六方铁氧体的序列。X 射线衍射检查显示，结晶材料形成了单一的 M 型六方相。M 型六方铁氧体的特征包括傅立叶变换红外曲线中 400 至 1000 cm-1 之间的低文数吸收带。磁性特征随 Sm3+ 和 Co2+ 的掺杂替换而变化，这可能是由于稀土 Sm3+ 和 Co2+ 离子产生的自旋悬臂效应。研究的目的是探索掺杂磁性六价铬的潜力及其在废水处理中的影响。研究还考察了影响水溶液中铅离子吸附的各种参数，如 pH 值和接触时间。在 pH 值为 7、温度为 25 ℃ 的条件下，70 分钟后，Sr0.95Sm0.05Fe11.5Co0.5O19 的最大去除率为 99%。利用永久磁铁施加外部磁场进行磁分离。铁氧体的强磁化率（51-58 emu/g）使磁性颗粒能从溶液中快速分离出来，95%以上的铁氧体颗粒在 10 至 70 分钟内被回收。Freundlich 等温线模型符合所有等温线数据。伪一阶、伪二阶和颗粒内扩散模型解释了吸附动力学。所研究样品的吸附能力在 5 个循环之前一直保持高效。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.