{"title":"在固定床反应器中使用纳米硅土优化孔雀石绿染料的去除效果","authors":"Jiten Yadav, Harneet Marwah, Janmejay Pant, Jagdeep Kumar","doi":"10.1007/s11051-024-06119-8","DOIUrl":null,"url":null,"abstract":"<div><p>Malachite green dye, widely used in various industries, poses significant threats to aquatic life and human health when present in water bodies. Traditional dye removal methods have limitations, prompting the need for innovative and sustainable solutions. This study investigates the potential of nano-ceramic clays, nano-silica clay, nano-kaolinite, nano-montmorillonite, and nano-titanium dioxide for removing malachite green dye (MGD) from water and wastewater. These clays exhibit exceptional properties, including high surface areas, specific structural characteristics, and enhanced reactivity, making them highly effective adsorbents. Various characterization techniques, such as UV–Vis spectrophotometry, FTIR analysis, XRD, SEM, high-resolution transmission electron microscopy, and BET analysis, were employed to analyse the properties of the raw and activated nano-ceramic clays. Continuous flow column experiments investigated the impact of various factors on the adsorption process. Characterization revealed critical insights into the structure, morphology, and surface properties of the nano-ceramic clays. Adsorption experiments demonstrated their effectiveness, with nano-silica clay achieving an efficient adsorption capacity under optimal conditions (pH 5, particle size 50 nm, temperature 35 °C, bed height 15 cm, dye concentration 50 mg/L, flow rate 5 mL/min, and duration 14 h), leading to 99.9% dye removal. Mathematical modelling predicted breakthrough curves for designing full-scale adsorption systems and in kinetics obeys Clark’s model and Sips isotherm model indicated that factors beyond diffusion influence the adsorption rate and type IV isotherm is obtained by the BET analysis. Regeneration studies with a 98.5% removal efficiency at the first regeneration validated the nano-ceramic clay as an effective agent dye removal, offering significant environmental benefits. Future research should focus on developing more economical synthesis methods to enhance the practical and sustainable application of nano-ceramic clays in water and wastewater treatment, thereby mitigating dye pollution effectively.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"26 9","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimizing malachite green dye removal with nano-silica clay in fixed-bed reactors\",\"authors\":\"Jiten Yadav, Harneet Marwah, Janmejay Pant, Jagdeep Kumar\",\"doi\":\"10.1007/s11051-024-06119-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Malachite green dye, widely used in various industries, poses significant threats to aquatic life and human health when present in water bodies. 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Adsorption experiments demonstrated their effectiveness, with nano-silica clay achieving an efficient adsorption capacity under optimal conditions (pH 5, particle size 50 nm, temperature 35 °C, bed height 15 cm, dye concentration 50 mg/L, flow rate 5 mL/min, and duration 14 h), leading to 99.9% dye removal. Mathematical modelling predicted breakthrough curves for designing full-scale adsorption systems and in kinetics obeys Clark’s model and Sips isotherm model indicated that factors beyond diffusion influence the adsorption rate and type IV isotherm is obtained by the BET analysis. Regeneration studies with a 98.5% removal efficiency at the first regeneration validated the nano-ceramic clay as an effective agent dye removal, offering significant environmental benefits. 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引用次数: 0
摘要
孔雀石绿染料广泛应用于各行各业，一旦进入水体，就会对水生生物和人类健康造成严重威胁。传统的染料去除方法存在局限性，因此需要创新和可持续的解决方案。本研究探讨了纳米陶瓷粘土、纳米硅粘土、纳米高岭石、纳米蒙脱石和纳米二氧化钛去除水和废水中孔雀石绿染料（MGD）的潜力。这些粘土具有优异的性能，包括高比表面积、特定的结构特征和更强的反应性，使它们成为高效的吸附剂。我们采用了多种表征技术，如紫外可见分光光度法、傅立叶变换红外光谱分析、XRD、扫描电镜、高分辨率透射电子显微镜和 BET 分析，来分析未加工纳米陶瓷粘土和活化纳米陶瓷粘土的特性。连续流动柱实验研究了各种因素对吸附过程的影响。表征揭示了纳米陶瓷粘土的结构、形态和表面特性。吸附实验证明了它们的有效性，在最佳条件下（pH 值 5、粒径 50 nm、温度 35 °C、床层高度 15 cm、染料浓度 50 mg/L、流速 5 mL/min、持续时间 14 h），纳米二氧化硅粘土具有高效的吸附能力，染料去除率达到 99.9%。数学模型预测了用于设计全尺寸吸附系统的突破曲线，动力学符合克拉克模型和西普斯等温线模型，表明除扩散因素外还有其他因素影响吸附速率，并通过 BET 分析获得了 IV 型等温线。再生研究表明，纳米陶瓷粘土在第一次再生时的去除率为 98.5%，这验证了纳米陶瓷粘土是一种有效的染料去除剂，具有显著的环境效益。未来的研究应侧重于开发更经济的合成方法，以提高纳米陶瓷粘土在水和废水处理中的实用性和可持续应用，从而有效减轻染料污染。
Optimizing malachite green dye removal with nano-silica clay in fixed-bed reactors
Malachite green dye, widely used in various industries, poses significant threats to aquatic life and human health when present in water bodies. Traditional dye removal methods have limitations, prompting the need for innovative and sustainable solutions. This study investigates the potential of nano-ceramic clays, nano-silica clay, nano-kaolinite, nano-montmorillonite, and nano-titanium dioxide for removing malachite green dye (MGD) from water and wastewater. These clays exhibit exceptional properties, including high surface areas, specific structural characteristics, and enhanced reactivity, making them highly effective adsorbents. Various characterization techniques, such as UV–Vis spectrophotometry, FTIR analysis, XRD, SEM, high-resolution transmission electron microscopy, and BET analysis, were employed to analyse the properties of the raw and activated nano-ceramic clays. Continuous flow column experiments investigated the impact of various factors on the adsorption process. Characterization revealed critical insights into the structure, morphology, and surface properties of the nano-ceramic clays. Adsorption experiments demonstrated their effectiveness, with nano-silica clay achieving an efficient adsorption capacity under optimal conditions (pH 5, particle size 50 nm, temperature 35 °C, bed height 15 cm, dye concentration 50 mg/L, flow rate 5 mL/min, and duration 14 h), leading to 99.9% dye removal. Mathematical modelling predicted breakthrough curves for designing full-scale adsorption systems and in kinetics obeys Clark’s model and Sips isotherm model indicated that factors beyond diffusion influence the adsorption rate and type IV isotherm is obtained by the BET analysis. Regeneration studies with a 98.5% removal efficiency at the first regeneration validated the nano-ceramic clay as an effective agent dye removal, offering significant environmental benefits. Future research should focus on developing more economical synthesis methods to enhance the practical and sustainable application of nano-ceramic clays in water and wastewater treatment, thereby mitigating dye pollution effectively.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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