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PHYSICAL, MECHANICAL AND MICROSTRUCTURE PROPERTIES OF METAKAOLIN BASED POROUS ALKALI ACTIVATED MATERIALS AS AN ADSORBENT FOR CU(II) ION REMOVAL

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Archives of Metallurgy and Materials 2025年第1期70卷 453-460页

作者： Wan Ibrahim, W.M. Al Bakri Abdullah, M.M. Romisuhani, A. Masdiyana, I. FACULTY OF MECHANICAL ENGINEERING AND TECHNOLOGY ARAU PERLIS02600 Malaysia PERLIS01000 Malaysia FACULTY OF CHEMICAL ENGINEERING AND TECHNOLOGY ARAU PERLIS02600 Malaysia

This study investigates the physical, mechanical, and microstructure properties of metakaolin-based porous alkali activated materials (AAM) at different surfactant concentrations as an adsorbent for Cu(II) ion removal. The AAM were synthesized using metakaolin as a precursor and alkali activators. Different surfactant contents ranging from 1 wt.% to 5 wt.% were incorporated into the AAM to enhance their adsorption capacity. The physical properties of the AAM were evaluated by determining their porosity, water absorption and density. The results showed that adding surfactant increased the AAM porosity, leading to higher water absorption. The highest porosity was observed at 3 wt.% surfactant content, indicating the optimal surfactant concentration for promoting a porous structure. The mechanical properties of the AAM were assessed through compressive strength tests. The microstructure analysis using scanning electron microscopy revealed that the AAM exhibited different microstructures depending on the surfactant content. The adsorption capacity and removal efficiency of the AAM for Cu(II) ion removal were determined. With a maximum adsorption capacity of 64.78 mg/g, the porous AAM could adsorb a significant Tuantity of Cu(II) ions. The outstanding removal efficiency of 97.17% showed the AAM maximum efficiency in removing Cu(II) ions from the solution at an adsorption condition of 25℃, pH 5, an initial concentration at 100 ppm and 60 minutes contact time. © 2025. The Author(s).

关键词： Compressive strength

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Preparation and Characterization of a Novel Energetic Cocrystal RDX:TNT (1:2)

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Central European Journal of Energetic Materials 2025年第1期22卷 94-106页

作者： Zohari, Narges Ghiasvand, Faezeh Akbari, Sara Faculty of Chemistry and Chemical Engineering Malek-ashtar University of Technology Tehran Iran

In this work, a new cocrystal named RDX:TNT is introduced and characterized. The DSC profile of the cocrystal exhibits a decomposition temperature of 217.71℃, a melting point of 78.30 ℃, and the thermal behaviour of melt-cast formulations. The results confirmed that the performance properties of the cocrystal are improved compared to TNT. The SEM images revealed that the cocrystal has a different morphology to its individual components. Furthermore, the existence of intermolecular hydrogen bonding is proven according to transitions in the FT-IR spectrum. The powder X-ray diffraction pattern verified the different crystal structure of the cocrystal by comparison to the individual components. Copyright © 2025 Lukasiewicz Research Network – Institute of Industrial Organic Chemistry, Poland

关键词： Hydrogen bonds

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Cu/TiO_(2)adsorbents modified by air plasma for adsorption-oxidation of H_(2)S

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Journal of Environmental Sciences 2025年第2期148卷 476-488页

作者： Yongqi Yan Xinyu Yang Ping Ning Chi Wang Xin Sun Fei Wang Peng Gao Kai Li Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China City College Kunming University of Science and TechnologyKunming 650500China

In this study,non-thermal plasma(NTP)was employed to modify the Cu/TiO_(2)adsorbent to efficiently purify H_(2)S in low-temperature and micro-oxygen *** effects of Cu loading amounts and atmospheres of NTP treatment on the adsorption-oxidation performance of the adsorbents were *** NTP modification successfully boosted the H_(2)S removal capacity to varying degrees,and the optimized adsorbent treated by air plasma(Cu/TiO_(2)-Air)attained the best H_(2)S breakthrough capacity of 113.29 mg H_(2)S/gadsorbent,which was almost 5 times higher than that of the adsorbent without NTP *** studies demonstrated that the superior performance of Cu/TiO_(2)-Air was attributed to increased mesoporous volume,more exposure of active sites(CuO)and functional groups(amino groups and hydroxyl groups),enhanced Ti-O-Cu interaction,and the favorable ratio of active oxygen ***,the X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)results indicated the main reason for the deactivationwas the consumption of the active components(CuO)and the agglomeration of reaction products(CuS and SO_(4)^(2−))occupying the active sites on the surface and the inner pores of the adsorbents.

关键词： Non-thermal plasma(NTP) Surface modification Simultaneous adsorption-oxidation Cu/TiO_(2)(TiO_(2)loaded with copper) H_(2)S

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Evaluation of UV transmission, self-cleaning and shear strength characteristics of nano and micro-scale metal oxides added epoxy based films

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Journal of Polymer Research 2025年第5期32卷 1-11页

作者： Taherian, Reza Salimi, Esmaeil Najafi, Yekta Faculty of Chemical and Materials Engineering Shahrood University of Technology P.O. Box *** Shahrood Iran

Using polymers instead of ceramics as floor covering materials could improve the integrity, transparency, anti-slip, pattern-ability, higher impact resistance, better wear protection and etc. of the coating. However, less resistance to UV rays, maintenance of surface pollution, low adhesion to concrete and the possibility of layering remained as challenges that must be eliminated. Therefore, the present research tried to add different quantities of fillers (5, 15 and 25 wt%) such as SiO2 and ZnO in nano and micro scales into the epoxy resin and evaluated the self-cleaning, transparency and adhesion resistance of the obtained composites for the first time. The obtained results indicated that the epoxy-based composite contained nanoparticles had higher transparency and self-cleaning capability, compared with composites contained micro-particles. Moreover, the amorphous silica nanoparticles could reduce the water contact angle of the film to around 46⁰ and not affected the transparency of the polymer, whereas crystalline ZnO and SiO2 micro-particles deteriorated the transparency and self-cleaning properties of the epoxy and moreover, increased the water contact angle of the obtained films to around 80–90⁰. Therefore, the fabricated transpaert thin film could be a potential candidate for surface covering application. © The Polymer Society, Taipei 2025.

关键词： Metal oxide ceramics

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Concrete Self-healing: Paving the Way for Sustainable Infrastructure 4th

Concrete Self-healing: Paving the Way for Sustainable Infras...

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4th International Conference on Sustainable Development in Civil, Urban and Transportation engineering, CUTE 2024

作者： Agbamu, Isaac Odiri Wysokowski, Marcin Jesionowski, Teofil Kuczma, Mieczyslaw Institute of Building Engineering Faculty of Civil Engineering Geodesy and Transport Poznan University of Technology Poznan Poland Institute of Chemical Technology and Engineering Faculty of Chemical Technology Poznan University of Technology Poznan Poland

ISBN: (纸本)9789819793990

Concrete, a fundamental construction material, is known for its durability and strength. However, over time, it is prone to developing cracks due to environmental stress, traffic loads, and material defects. This susceptibility to damage has driven the development of advanced self-healing technologies to enhance concrete’s longevity and performance. This study focuses on the application of sodium alginate in creating self-healing concrete (SHCr), using CEM II/A-LL 42.5R cement to produce C20/25-grade concrete. Sodium alginate, a natural polymer derived from seaweed, is encapsulated in micron-sized capsules and integrated into the concrete matrix. Upon crack formation, these capsules release the healing agent, which forms a gel with calcium ions present in the concrete, sealing the cracks and restoring structural integrity. The use of SHCr offers significant benefits, including enhanced durability, cost efficiency, and, most importantly, environmental sustainability. By reducing the need for frequent repairs, SHCr contributes to lower carbon emissions and promotes the use of renewable resources, fostering a sense of responsibility and commitment to sustainable practices. Case studies, such as the Kieldrecht Lock in Belgium and various infrastructure projects, demonstrate the practical applications and effectiveness of this innovative technology. The research also highlights the environmental implications, including reduced carbon footprint and sustainable resource utilisation. This paper aims to provide a comprehensive overview of the potential of SHCr to revolutionise the construction industry, addressing the challenges of concrete degradation and promoting sustainable construction practices. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Sodium alginate

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engineering stable multi-component pH responsive nanomedicine for enhanced photothermal/photodynamic therapy

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Chinese Journal of chemical engineering 2025年 81卷 32-44页

作者： Zheng, Zhiyuan Wu, Yue Chen, Yuan Sun, Xinyue Kayitmazer, Ayşe Başak Ahmad, Ayyaz Ramzan, Naveed Rafique, Muhammad Shahid Zhou, Xiaolong Xu, Yisheng State-Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai200237 China Department of Chemistry Bogazici University Istanbul Turkey Department of Chemical Engineering Muhammad Nawaz Sharif University of Engineering and Technology Multan Pakistan Faculty of Chemical Metallurgical and Polymer Engineering University of Engineering and Technology Lahore Pakistan Department of Physics University of Engineering and Technology Lahore Pakistan International Joint Research Center of Green Energy Chemical Engineering East China University of Science and Technology Shanghai200237 China

Integrating multiple modalities of cancer therapies for synergistic and enhanced therapeutic efficacy remains challenging. Herein, flash nanoprecipitation (FNP), a kinetically driven process, was employed to expedite the coordination reaction time required for nano-encapsulate components with completely opposite physiochemical properties including sorafenib (SRF), hemoglobin (Hb), chlorin e6 (Ce6), and indocyanine green (ICG) into a multi-component HSCI nanomedicine. Hydrophilic components Hb and ICG interact to form hydrophobic ICG-Hb complexes under electrostatic and hydrophobic interactions. This process facilitates the characteristic time of nucleation (τnucleation) to match the characteristic mixing time (τmix) of the FNP process, resulting in the formulation of kinetically stable nanomedicine, overcoming the long equilibrium times and instability issues associated with thermodynamic assembly. Importantly, pH-responsive structure is also easily but effectively integrated in nanomedicine during this kinetically driven formulation to manipulate its structures. In the acidic tumor microenvironment (TME), the pH-stimulated morphology transformation of HSCI nanomedicine boosts its reactive oxygen species (ROS) generation efficiency and photothermal efficacy, endowing it with better antitumor suppression. In vitro and in vivo experiments reveal that the HSCI nanomedicine offers a synergistic therapeutic effect and stronger tumor suppression compared with single therapies. These results open a new window for developing strategies for multimodal combinatory cancer therapies. © 2025 The chemical Industry and engineering Society of China, and chemical Industry Press Co., Ltd.

关键词： chemical industry

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Environmental waste-derived dual heteroatom-rich sustainable carbon as anodes for Li- and Na-ion batteries

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Journal of Industrial and engineering Chemistry 2025年 147卷 461-470页

作者： Balasubramaniam, Ramkumar Thangavel, Ranjith Dhanasekaran, Hariharan Moorthy, Megala Park, Sangho Srituravanich, Werayut Lee, Hyun-Yong Lee, Yun-Sung Faculty of Chemical Engineering Chonnam National University Gwangju500757 Korea Republic of School of Energy Science and Engineering Indian Institute of Technology Guwahati Guwahati781039 India Department of Chemical Engineering Indian Institute of Technology Tirupati Tirupati517619 India School of Chemical Engineering Jeonbuk National University Jeonju554896 Korea Republic of Department of Mechanical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand

In this study, we demonstrate the use of dual heteroatom-doped (i.e., N- and S-doped) porous carbon derived from the filters in cigarette butts, which are categorized as solid environmental waste. We use a facile, sustainable, and inexpensive method and green chemical activation for application in LIBs and SIBs. The carbon prepared by activating melamine is highly porous with rich and mesopores along with a high Brunauer-Emmett-Teller (BET) surface area (815.8 m2 g−1) and pore volume (0.404 cm3 g−1). The favorable textural properties, such as enlarged interlayer d-spacing, edge defects, electrochemically active N and S functionalities, and high electronic conductivity, make this porous carbon an attractive candidate for both Li- and Na-ion storage applications. The porous carbon delivered high capacities of ∼872 mAh g−1 and 289 mAh g−1 at 500 mA g−1 when employed as anodes for LIBs and SIBs, respectively. The high-performance porous carbon materials developed via the proposed green and sustainable approach can be applied to advanced energy storage systems. © 2024

关键词： Carbon sequestration

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Tacticity Effects on Compatibility of Polyglycidyl Nitrate with Nitrate Ester Plasticizers: A Molecular Dynamics Simulation

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Chemistry Africa 2025年 1-10页

作者： Fallah, Dariush Faculty of Chemistry and Chemical Engineering Malek Ashtar University of Technology Tehran Iran

The structure of a polymer determines the characteristics and final properties of a polymer. Isotactic, syndiotactic, and atactic are different forms of tacticity that can affect the properties of the polymer. Most energetic polymers usually have different tacticities that can change their properties from one form to another. In this research, the compatibility of polyglycidyl nitrate as an energetic polymer with nitrate ester plasticizers such as triethylene glycol dinitrate (TEGDN), 1,2,4-butanetriol trinitrate (BTTN), trimethylolethane trinitrate (TMETN), and glyceryl trinitrate (GTN) was studied by NPT-molecular dynamics (NPT-MD) simulation and Compass III forcefield settings. For this purpose, the compatibility of isotactic, syndiotactic, and atactic forms with TEGDN, BTTN, TMETM, and GTN plasticizers was simulated by balancing different parameters such as temperature, density, energy, etc. Molecular dynamics simulations showed that the isotactic form of polyglycidyl nitrate has the highest binding energy and compatibility with these plasticizers, and syndiotactic and atactic forms are not suitable for the compatibility of these plasticizers. Among the studied plasticizers, the highest binding energy of 385.304 ***^{− 1} was observed in BTTN with isotactic polyglycidyl nitrate, and BTTN showed the most compatibility with isotactic polyglycidyl nitrate. The analysis of the solubility parameter, radial distribution function (RDF), and calculated mechanical properties demonstrated that BTTN exhibits excellent miscibility and compatibility with isotactic-polyglycidyl nitrate. © The Tunisian chemical Society and Springer Nature Switzerland AG 2025.

关键词： Compatibility Molecular dynamics simulation Nitrate ester plasticizer Polyglycidyl nitrate Tacticity

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Effect of Cu/HZSM-5 sorbents with different Si/Al ratios on the adsorption and oxidation performance of H_(2)S

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Journal of Environmental Sciences 2025年第5期151卷 161-173页

作者： Kaini Ma Kai Li Ping Ning Jiayu Feng Jiacheng Bao Lei Shi Xiangyu Wang Xin Sun Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500China

This study employed a wet impregnation method to synthesize five types of Cu/HZSM-5 adsorbents with Si/Al ratios of 25,50,85,200,and 300,used for the removal of H_(2)S in lowtemperature,low-oxygen *** impact of different Si/Al ratios on the adsorption oxidative performance of Cu_(30)/HZSM-5–85 adsorbents was *** to the performance test results,Cu_(30)/HZSM-5–85 exhibited the highest breakthrough capacity,reaching 231.75 mg H_(2)S/g_(sorbent).Cu/HZSM-5 sorbent maintains a strong ability to remove H_(2)S even under humid conditions and shows excellent water ***,BET,and XPS results revealed that CuO is the primary active species,with Cu_(30)/HZSM-5–85 having the largest surface area and highest CuO content,providing more active sites for H_(2)S adsorption.H_(2)-TPR and O_(2)-TPD results confirmed that Cu_(30)/HZSM-5–85 sorbent exhibits outstanding redox properties and oxygen storage capacity,contributing to excellent oxygen transferability in the molecular sieve adsorption-oxidation *** notable characteristics such as a large surface area,high desulfurization efficiency,and water resistance,Cu_(30)/HZSM-5–85 sorbents hold significant importance for industrial applications.

关键词： H_(2)S Si/Al ratio Adoration-oxidation Cu/HZSM-5-85(HZSM-5 with Si/Al ratio of 85 loaded Cu)

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Fabrication of PVA-PVC composite membrane for enhanced TDS removal from tannery effluent: sustainable water treatment approach

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Environmental Science and Pollution Research 2025年第2期32卷 976-992页

作者： Hasan, Md. Mahadi Noyon, Md Ashikur Rahaman Akash, Azmain Iktider Uddin, Md. Elias Islam, Rashedul Maafa, Ibrahim Yousef, Ayman Department of Leather Engineering Faculty of Mechanical Engineering Khulna University of Engineering & Technology Khulna9203 Bangladesh Department of Chemical Engineering Faculty of Engineering Jazan University Jazan11451 Saudi Arabia Department of Mathematics and Physics Engineering Faculty of Engineering at Mataria Helwan University Cairo11718 Egypt

The environmental burden of tannery wastewater, characterized by high levels of total dissolved solids (TDS) and other contaminants, presents a significant challenge for sustainable water management. This study addresses this issue by developing a novel polyvinyl alcohol (PVA) and polyvinyl chloride (PVC) composite membrane optimized for efficient TDS removal from tannery effluent. The membrane was fabricated using a solution casting technique, with glutaraldehyde employed as a crosslinking agent to enhance mechanical properties and stability. Characterization techniques, including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), zeta potential analysis, and contact angle measurements, were used to evaluate the membrane’s surface chemistry, morphology, and hydrophilicity, which are crucial for pollutant separation. Performance testing demonstrated that the membrane achieved a TDS removal efficiency of 91.73% at an optimal pH of 8 and a transmembrane pressure of 3.5 bar, with a permeability of 194 Lm−2 h−1 bar−1. Additionally, substantial reductions in turbidity (94.51%), chemical oxygen demand (COD, 91.91%), biological oxygen demand (BOD, 89.70%), salinity (80.57%), and total suspended solids (TSS, 96.45%) were observed. The membrane exhibited impressive mechanical properties, with a tensile strength of 44 ± 0.43 MPa, 150 ± 0.67% elongation at break, Young’s modulus of 750 ± 0.47 MPa, and flexibility of 23 ± 0.53%, indicating its flexibility and durability. Its partial biodegradability and potential for scalable production contribute to its environmental sustainability. This work establishes the PVA-PVC composite membrane as a promising and cost-effective solution for industrial wastewater treatment, offering a sustainable approach to mitigating water pollution in the leather industry. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Tensile strength

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