利用基于 CeO2 和鳞片状纤维粘土组合的异质结构材料实现高效环丙沙星去除率

IF 2.2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Minerals Pub Date : 2024-07-31 DOI:10.3390/min14080792
Vanessa N. S. Campos, Josefa D. J. P. Santos, Rebecca J. P. Araújo, Pedro H. S. Lopes, Marco A. S. Garcia, Alex Rojas, Mayara M. Teixeira, Cícero W. B. Bezerra, Ana C. S. Alcântara
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引用次数: 0

摘要

环丙沙星是第二代氟喹诺酮类药物,被广泛应用于人类和兽医领域。然而,众所周知,环丙沙星具有环境持久性和促进细菌产生抗药性的能力,会对各种水生生物产生基因毒性影响和慢性毒性。吸附是一种有效的水处理技术,可以去除多种有机分子,即使浓度极低。基于纤维状粘土矿物(如白云石)的混合材料在环境修复方面大有可为,如果用氧化物对其进行改性以提高其吸附性能,效果会更加显著。这项研究利用各种理化技术(XRD、傅立叶变换红外光谱、BET、扫描电镜)制备了 CeO2/palygorskite 混合材料,并对其进行了表征,结果表明这种异质结构材料的形成具有有趣的纹理特性。对这种 CeO2/palygorskite 作为抗生素药物环丙沙星的吸附剂进行了评估。使用伪一阶和伪二阶动力学模型研究了 pH 值(3、7 和 9)和环丙沙星浓度(6、8、10 和 14 ppm)对吸附的影响。伪二阶动力学模型的拟合度最高(R2 > 0.99),平方误差(SSE)最小,表明存在化学吸附作用。对实验数据采用了 Langmuir、Freundlich 和 Temkin 等温线,其中 Langmuir 模型的拟合效果最好,表明其为单层吸附,最大吸附容量为 15 mg-g-1。通过傅立叶变换红外光谱进行的吸附后表征证实了该材料的结构稳定性,由于其吸附剂浓度高,因此在环境修复方面具有广阔的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High Performance of Ciprofloxacin Removal Using Heterostructure Material Based on the Combination of CeO2 and Palygorskite Fibrous Clay
Ciprofloxacin, a second-generation fluoroquinolone, is widely used in human and veterinary medicine. However, it is known for its environmental persistence and ability to promote bacterial resistance, causing genotoxic impacts and chronic toxicity in various aquatic life forms. Adsorption is an effective technique for water treatment, removing multiple organic molecules, even in minimal concentrations. Hybrid materials based on fibrous clay minerals, such as palygorskite, are promising for environmental remediation, significantly when modified with oxides to improve their adsorption properties. This work prepared and characterized a CeO2/palygorskite hybrid material using various physicochemical techniques (XRD, FTIR, BET, SEM), which indicated the formation of the heterostructure material with interesting textural properties. This CeO2/palygorskite was evaluated as an adsorbent of the antibiotic drug ciprofloxacin. The influence of pH (3, 7, and 9) and ciprofloxacin concentration (6, 8, 10, and 14 ppm) on adsorption were studied, using pseudo-first- and pseudo-second-order kinetic models. The pseudo-second-order model showed the best fit (R2 > 0.99) and the lowest squared error (SSE), indicating chemisorption. The Langmuir, Freundlich, and Temkin isotherms were applied to the experimental data, where the Langmuir model had the best fit, indicating monolayer adsorption with a maximum capacity of 15 mg·g−1. Post-adsorption characterization by FTIR confirmed the structural stability of the material, highlighting its promising application in environmental remediation due to its high concentration of adsorbents.
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来源期刊
Minerals
Minerals MINERALOGY-MINING & MINERAL PROCESSING
CiteScore
4.10
自引率
20.00%
发文量
1351
审稿时长
19.04 days
期刊介绍: Minerals (ISSN 2075-163X) is an international open access journal that covers the broad field of mineralogy, economic mineral resources, mineral exploration, innovative mining techniques and advances in mineral processing. It publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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