Thermal tuning of nanocomposites for superior cadmium ion adsorption.

IF 3.8 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Ehab A Abdelrahman, Mohamed N Goda, Abdalla M Khedr, Fawaz A Saad, Reem K Shah
{"title":"Thermal tuning of nanocomposites for superior cadmium ion adsorption.","authors":"Ehab A Abdelrahman, Mohamed N Goda, Abdalla M Khedr, Fawaz A Saad, Reem K Shah","doi":"10.1038/s41598-025-09274-7","DOIUrl":null,"url":null,"abstract":"<p><p>Cadmium (Cd(II)) ions are hazardous, non-biodegradable pollutants known for their bioaccumulative nature and severe risks to human health and aquatic ecosystems. This study presents the synthesis and application of a Co<sub>0.89</sub>Mg<sub>0.79</sub>Mn<sub>1.46</sub>O<sub>3.98</sub>@C nanocomposite, fabricated employing the Pechini sol-gel approach and subsequently calcinated at 600 <sup>o</sup>C (C600) and 800 <sup>o</sup>C (C800), for enhanced elimination of Cd(II) ions from aqueous environments. The C600 and C800 samples exhibited maximum uptake capacities of 280.11 mg/g and 206.19 mg/g, respectively. X-ray diffraction (XRD) analysis confirmed a cubic structure for both samples, with crystallite sizes of 51.66 nm (C600) and 87.09 nm (C800). Field emission scanning electron microscopy (FE-SEM) analysis clarified that C600 consisted of smaller, irregular grains, while C800 displayed larger, smoother particles. Elemental composition was verified by energy-dispersive X-ray spectroscopy (EDX), revealing elevated manganese and cobalt content in C800, attributed to enhanced incorporation at elevated temperatures. The superior adsorption performance of C600 was ascribed to its reduced crystallite size in addition to greatest surface area. Regeneration studies demonstrated excellent desorption efficiencies using 3 M HCl: 99.69% for C600 and 99.35% for C800, with both maintaining high removal efficiency over five adsorption-desorption cycles. Thermodynamic assessments indicated the process is exothermic, spontaneous, and dominated by physisorption. Kinetic modeling followed the pseudo-second-order model, while isotherm analysis fit the Langmuir-type isotherm, suggesting single-layer adsorption occurring uniformly across the adsorbent surface.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"24003"},"PeriodicalIF":3.8000,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scientific Reports","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1038/s41598-025-09274-7","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Cadmium (Cd(II)) ions are hazardous, non-biodegradable pollutants known for their bioaccumulative nature and severe risks to human health and aquatic ecosystems. This study presents the synthesis and application of a Co0.89Mg0.79Mn1.46O3.98@C nanocomposite, fabricated employing the Pechini sol-gel approach and subsequently calcinated at 600 oC (C600) and 800 oC (C800), for enhanced elimination of Cd(II) ions from aqueous environments. The C600 and C800 samples exhibited maximum uptake capacities of 280.11 mg/g and 206.19 mg/g, respectively. X-ray diffraction (XRD) analysis confirmed a cubic structure for both samples, with crystallite sizes of 51.66 nm (C600) and 87.09 nm (C800). Field emission scanning electron microscopy (FE-SEM) analysis clarified that C600 consisted of smaller, irregular grains, while C800 displayed larger, smoother particles. Elemental composition was verified by energy-dispersive X-ray spectroscopy (EDX), revealing elevated manganese and cobalt content in C800, attributed to enhanced incorporation at elevated temperatures. The superior adsorption performance of C600 was ascribed to its reduced crystallite size in addition to greatest surface area. Regeneration studies demonstrated excellent desorption efficiencies using 3 M HCl: 99.69% for C600 and 99.35% for C800, with both maintaining high removal efficiency over five adsorption-desorption cycles. Thermodynamic assessments indicated the process is exothermic, spontaneous, and dominated by physisorption. Kinetic modeling followed the pseudo-second-order model, while isotherm analysis fit the Langmuir-type isotherm, suggesting single-layer adsorption occurring uniformly across the adsorbent surface.

纳米复合材料对镉离子吸附性能的热调谐。
镉(Cd(II))离子是一种危险的、不可生物降解的污染物,具有生物蓄积性,对人类健康和水生生态系统构成严重风险。本研究介绍了Co0.89Mg0.79Mn1.46O3.98@C纳米复合材料的合成和应用,该材料采用Pechini溶胶-凝胶法制备,随后在600℃(C600)和800℃(C800)下煅烧,以增强水环境中Cd(II)离子的去除。C600和C800样品的最大吸收能力分别为280.11 mg/g和206.19 mg/g。x射线衍射(XRD)分析证实两种样品均为立方结构,晶粒尺寸分别为51.66 nm (C600)和87.09 nm (C800)。场发射扫描电镜(FE-SEM)分析表明,C600由较小的不规则颗粒组成,而C800则由较大的光滑颗粒组成。通过能量色散x射线光谱(EDX)验证了元素组成,揭示了C800中锰和钴含量的升高,这是由于温度升高导致的。C600具有优异的吸附性能,主要是因为其比表面积大,晶粒尺寸小。再生研究表明,使用3 M HCl时,C600和C800的脱附效率分别为99.69%和99.35%,在5次吸附-脱附循环中均保持较高的去除效率。热力学评价表明该过程是放热的、自发的、以物理吸附为主的。动力学模型符合拟二阶模型,等温线分析符合langmuir型等温线,表明吸附剂表面均匀发生单层吸附。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信