Research and Application Progress of Geopolymers in Adsorption: A Review

Xu, Jingkun; Li, Minjing; Zhao, Dongyuan; Zhong, Guoqiang; Sun, Yu; Hu, Xudong; Sun, Jingbo; Li, Xiaoyun; Zhu, Wenming; Li, Ming; Zhang, Ziqi; Zhao, Liping; Zheng, Chunming; Sun, Xingming

doi:10.3390/nano12173002

Cited by 22 publications

(9 citation statements)

References 124 publications

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“…The XPS results of Mn 2p are shown in Figure 7j-l. From Figure 7j-l, it can be seen that the binding energy of Mn 2p 2/3 is around 641.4 eV before and after the reaction. Combined with the change in the binding energy of O1s and the fact that only a very small amount of free Mn was detected in the leaching test, it is hypothesized that during the geopolymerization process, Mn2+ is either wrapped up by the three-dimensional mesh structure of the geopolymer or reacts to form more stable compounds that immobilize the interior of the geopolymer and reduce the leaching concentration of Mn [42]. material, which corresponds to the peak in the geopolymer, shifted to 1112 cm −1 , which indicates that a geopolymerization reaction took place and the corresponding gelling substance was produced.…”

Section: Xps Analysismentioning

confidence: 99%

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

Mi,

Zhao,

et al. 2024

Materials

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The massive stockpiling of electrolytic manganese residue (EMR) has caused serious environmental pollution. In this study, EMR, coal gangue (CG), and fly ash (FA) were used as raw materials to obtain the optimal mix ratio based on Design-Expert mixture design. The effects of activator modulus, liquid–solid (L/S) ratio, and curing temperature on the mechanical properties of geopolymers were investigated. The results showed that the compressive strength of the prepared geopolymer was 12.0 MPa, and the 28d leaching of Mn was 0.123 mg/L under the conditions of EMR:CG:FA = 0.43:0.34:0.23, L/S = 0.9, a curing temperature of 60 °C, and a curing time of 24 h. This indicates that the geopolymer is an environmentally friendly material with high compressive strength. The mineral composition of the geopolymer is mainly hydrated calcium silicate and geopolymer gel. In addition, a more stable new mineral phase, MnSiO3, was generated. The Fourier transform infrared (FTIR) spectrogram showed that the peak at 1100 m−1 was shifted to 1112 cm−1, which indicated that a geopolymerization reaction had occurred. Through scanning electron microscopy (SEM) and energy dispersive spectrum (EDS) analysis, it was identified that the geopolymerization produced a large amount of amorphous gelatinous substances with a relatively dense structure, the major elements being oxygen, silicon, aluminum, calcium, and sodium.

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Section: Xps Analysismentioning

confidence: 99%

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

Mi,

Zhao,

et al. 2024

Materials

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“…Geopolymers are one of the effective materials used in this adsorption process (Gupta et al, 2012). The high ion-exchange capacity of geopolymers allows them to effectively adsorb heavy metals (Xu et al, 2022). Research indicates that geopolymers are effective in removing heavy metals such as Pb 2+ , Ni 2+ , and Zn 2+ (Al-Zboon, Al-Harahsheh, & Hani, 2011).…”

Section: Use Of Geopolymers In Water Recovery From Wastewatermentioning

confidence: 99%

Advances in Engineering and Environmental Sciences

2023

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In the ever-evolving landscape of science and technology, the fields of engineering and environmental sciences have emerged as the vanguards of innovation and sustainability. These domains intersect and intertwine, shaping the future of our world. This book is a testament to the pursuit of knowledge and progress in these crucial areas. A diverse array of topics is proposed that not only reflect the current state of these disciplines but also illuminate the path ahead. Our aim is to provide a comprehensive overview of the developments in engineering and environmental sciences, offering a valuable resource for scholars, researchers, and practitioners. The chapters contained within this book span a wide spectrum of subjects, each contributing a unique facet to the ever-expanding mosaic of knowledge. The opening chapters delve into the world of advanced materials and innovative engineering practices. Self-healing composites, with their transformative ability to repair structural damage autonomously, promise to revolutionize industries ranging from aerospace to construction. Lattice structures and FDM printed parts explore the intricate balance between design and function, pushing the boundaries of what is possible in manufacturing and construction. The next contributions traverse the frontier of biotechnology and its applications. Nanobiotechnology takes us into the realm of the infinitesimally small, where nanomaterials and techniques hold immense potential for fields such as medicine, energy, and environmental remediation. Biomaterials open doors to the development of biocompatible materials, spurring advancements in healthcare and regenerative medicine. Microbial safety underscores the importance of understanding and managing microorganisms in various environmental contexts. Other chapters explore the broader systems and environmental aspects of engineering. Server queueing models provide insights into optimizing digital infrastructures, crucial in an increasingly interconnected world. Climate-smart agriculture offers solutions to feed a growing global population while mitigating the impacts of climate change. Deep learning architectures, inspired by the human brain, unlock new horizons in artificial intelligence and data analysis. Thank you for joining us on this exciting expedition into the fields of engineering, science, and the environment. The voyage ahead is filled with challenges, but it is also packed with limitless possibilities and discoveries waiting to be made. Sincerely,Prof. Raul D.S.G. CAMPILHO

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“…The structural integrity of aluminosilicate ceramics, achieved through non-firing processes, provides a robust framework that resists mechanical stress and high temperatures [ 17 , 23 ]. This durability is crucial for industrial applications, where materials must endure harsh conditions [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

MOF-Enhanced Aluminosilicate Ceramic Membranes Using Non-Firing Processes for Pesticide Filtration and Phytochrome Removal

Zhao,

Xu,

et al. 2024

Nanomaterials

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Aluminosilicates, abundant and crucial in both natural environments and industry, often involve uncontrollable chemical components when derived from minerals, making further chemical purification and reaction more complicated. This study utilizes pure alumina and fumed silica powders as more controllable sources, enhancing aluminosilicate reactivity through room temperature (non-firing) processing and providing a robust framework that resists mechanical stress and high temperature. By embedding iron-based metal–organic frameworks (Fe-MOF/non-firing aluminosilicate membranes) within the above matrix, these ceramic membranes not only preserve their mechanical robustness but also gain significant chemical functionality, enhancing their capacity to removing phytochromes from the vegetables. Sodium hydroxide and sodium silicate were selected as activators to successfully prepare high-strength, non-firing aluminosilicate membranes. These membranes demonstrated a flexural strength of 8.7 MPa under wet-culture conditions with a molar ratio of Al2O3:SiO2:NaOH:Na2SiO3 at 1:1:0.49:0.16. The chlorophyll adsorption of spinach conducted on these membranes showed a removal rate exceeding 90% at room temperature and pH = 9, highlighting its potential for the selective adsorption of chlorophyll. This study underscores the potential of MOF-enhanced aluminosilicate ceramic membranes in environmental applications, particularly for agricultural pollution control.

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Research and Application Progress of Geopolymers in Adsorption: A Review

Cited by 22 publications

References 124 publications

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

Advances in Engineering and Environmental Sciences

MOF-Enhanced Aluminosilicate Ceramic Membranes Using Non-Firing Processes for Pesticide Filtration and Phytochrome Removal

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