Article
Chemistry, Applied
Silviya Boycheva, Agnes Szegedi, Karoly Lazar, Cyril Popov, Margarita Popova
Summary: The coal fly ash zeolites with increased iron oxide content were prepared and modified using radiofrequency plasma treatment. The plasma-modified iron-enriched zeolite showed high catalytic activity for VOC oxidation. The CO2 adsorption capacity of the plasma-modified zeolite under dynamic conditions was also investigated.
Article
Environmental Sciences
Jingfan Zheng, Jing Wang, Fengling Yang, Zhiping Du, Fangqin Cheng
Summary: Selective non-catalytic reduction (SNCR) with NH3 as the reducing agent is commonly used for denitrification in coal-fired boilers. In this study, the mechanisms of NH3 adsorption and reactions on coal ash were investigated. The adsorption capacity of lignite ash was higher than that of anthracite ash due to its larger specific surface area and surface acidity. At temperatures between 450-850 degrees C, coal ash exhibited catalytic activity for NH3 decomposition and oxidation. NH3 adsorbed over acid sites on coal ash and underwent hydrogen abstraction to produce intermediates, which then reacted with the surface lattice oxygen of coal ash to produce NO and N2O.
Article
Construction & Building Technology
Saif Al-Shmaisani, Ryan D. Kalina, Raissa Douglas Ferron, Maria C. G. Juenger
Summary: The availability of traditional siliceous Class F fly ash is decreasing as countries switch to renewable energy sources. To extend the availability of siliceous fly ash, suppliers are distributing blended coal ashes and incorporating other coal combustion products (CCPs) or natural pozzolans. While the characteristics of these blended fly ashes may differ, they perform well in cement-based mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuxi Chao, Mengqi Zhao, Qingqing Guan, Hao Guo, Dejun Chen, Xiaoqing Ma
Summary: Suspension curing technology was used to recover heavy metals from sewage and synthesize adsorptive/catalytic dual-system materials. The maximum adsorption capacities of Cu2+ and Mn3+ were high, and the calcined products showed strong catalytic property and water resistance.
Article
Engineering, Environmental
Hao Jiang, Xinran Li, Zhilong Liu, Xin Zhang, Pengxu Cao, Jun Luo
Summary: The study shows that Ag+-loaded tobermorite synthesized from coal fly ash exhibits excellent antibacterial properties against E. coli and S. aureus, with stable minimum inhibitory concentrations and slow release rate. This material has potential application prospects for antibacterial decorative purposes in public health protection.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Ewelina Grabias-Blicharz, Rafal Panek, Malgorzata Franus, Wojciech Franus
Summary: Mechanically treated fly ash was used to provide Al and Si atoms for zeolite synthesis. The combination of mechanical activation and hydrothermal synthesis improved the dissolution of activated fly ash and the crystallization of zeolites. The obtained zeolite materials exhibited high crystallinity and a large specific surface area. This study provides important data for utilizing fly ash resources and synthesizing practical zeolites.
Article
Engineering, Environmental
Jianhan Li, Gaofei Xiao, Ziyang Guo, Beilong Lin, Yun Hu, Mingli Fu, Daiqi Ye
Summary: This study utilized a V-Cu bimetallic bifunctional catalyst VCu/ZSM-5 to efficiently remove VOCs and tolerate complex flue gas, with the catalytic material easily fabricated via the impregnation method. The enhanced performance of the V-Cu/ZSM-5 catalyst was attributed to improved reducibility at lower temperatures, higher electron transfer efficiency, more abundant O alpha species, and lower C7H8 activation temperature, providing insights for removing VOCs from complex coal-fired flue gas.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
E. R. Teixeira, A. Camoes, F. G. Branco
Summary: Sustainable construction is important, especially in terms of building materials. Using biomass fly ash as a cement replacement material in high-volume fly ash concrete can improve its properties and contribute positively to its quality, durability, and sustainability.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Mingxin Xu, Yachang Wu, Pingxin Zhang, Zishu Liu, Zhuang Hu, Qiang Lu
Summary: In this study, a green and moderate activation approach for coal fly ash (CFA) was proposed, and a series of CFA-based catalysts were prepared for NO selective catalytic reduction. The results showed that CFA could be effectively activated through mechanochemical activation, improving its activity for NO removal. The activation mechanisms involved enhanced CFA fragmentation and motivated Al dissolution, which increased oxygen storage capacity and NH3 adsorption capacity, respectively, leading to improved NO reduction performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Katarina Muzina, Stanislav Kurajica, Patrick Guggenberger, Marina Duplancic, Goran Drazic
Summary: Pure and copper-doped ceria nanoparticles were synthesized using the hydrothermal method and tested for catalytic activity. The sample with 40 mol.% copper showed the highest catalytic activity, and a beneficial synergistic effect between copper and cerium species was observed in the overall properties of the materials.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Construction & Building Technology
Mahdi Rafieizonooz, Elnaz Khankhaje, Shahabaldin Rezania
Summary: Coal power plant wastes and coal ash concrete have the potential to replace cement and fine aggregate, allowing for the production of sustainable and environmentally friendly concrete with reduced cost and natural resource utilization.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Energy & Fuels
Mengye Jin, Tao Zhu, Shouheng Li, LiFeng Wang, Yusheng Liu, Yan Yu, Yiwei Han
Summary: In this study, CeMnOx-ZF catalysts with different metal loadings were prepared from coal fly ash (CFA) and their catalytic oxidation effects on toluene were investigated. The synergy between Ce and Mn metals in CeMnOx-ZF catalysts was studied. The optimized conditions for highest activity of CFA were determined, and the 20 wt.% CeMnOx-ZF catalyst exhibited a high toluene removal efficiency of up to 99.6% under optimized reaction conditions. The catalyst also showed high stability even after a 100-hour cycle test. This study provides a simple method for CFA activation and proposes a feasible strategy for designing high-efficiency catalysts for VOC degradation.
Article
Chemistry, Multidisciplinary
Srisin Eaimsumang, Nuwong Chollacoop, Apanee Luengnaruemitchai, Stuart H. Taylor
Summary: This study demonstrates a simple hydrothermal synthesis approach for preparing CeO2-supported gold (Au) catalysts, which exhibit enhanced catalytic performance in oxidation reactions when the reducibility of CeO2 support increases and the number of adsorbed peroxide species on the support increases due to Au addition.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Yewei Ren, Xue Lei, Hui Wang, Jianping Xiao, Zhenping Qu
Summary: Modulating the activity of oxygen species in transition metal oxide catalysts is crucial for environmental catalytic oxidation reactions. In this work, the mobility of lattice oxygen and activation ability of gas oxygen over CoMn2O4 were effectively regulated by in situ solvothermal-induced lanthanum doping, leading to enhanced VOCs oxidation activity. The introduction of lanthanum species into the spinel lattice significantly increased the oxygen vacancies and weakened the metal-oxygen bond strength, resulting in higher mobility and reactivity of lattice oxygen and improved conversion of toluene to CO2 and H2O.
Article
Chemistry, Inorganic & Nuclear
Kai Zhang, Wenhuan Wang, Honglei Ding, Weiguo Pan, Junchi Ma, Yuetong Zhao, Jie Song, Ziyi Zhang
Summary: In this study, high-efficiency CeO2-SMO-H and Ag-SMO-H catalysts were prepared for acetone degradation. The synergistic effect of CeO2 and Ag with acid-etched SMO support contributes to the excellent activity of the catalyst. The surface and lattice defects formed by acid etching optimize the dispersibility of Ag and CeO2 nanoparticles. A new catalyst modification method using acid-etched SmMn2O5 as support has been developed for the catalytic degradation of acetone.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Natasa Zabukovec Logar, Iztok Arcon, Janez Kovac, Margarita Popova
Summary: The study investigated the loading mechanism of Cu2+ in commercial natural HEU-type and synthetic LTA-type zeolites, as well as their potential regeneration and utilization. Post-treatment of zeolites allows for effective removal of pollutants and their use as catalysts for various reactions.
CHEMIE INGENIEUR TECHNIK
(2021)
Article
Environmental Sciences
Silviya Boycheva, Denitza Zgureva, Hristina Lazarova, Margarita Popova
Summary: This study investigates the influence of calcium content in CFA on the properties of coal fly ash zeolites, as well as the carbon capture capacity of different types of zeolites. The development of efficient adsorbents from CFA with varying composition is expected to contribute to environmental benefits and the advancement of CO2 capture technologies in the context of the circular economy.
Article
Chemistry, Inorganic & Nuclear
Ivalina Trendafilova, Hristina Lazarova, Ralitsa Chimshirova, Boryana Trusheva, Neli Koseva, Margarita Popova
Summary: The study demonstrated that loading kaempferol onto Mg-modified MCM-41 mesoporous silica carriers improved its solubility, and using mesoporous silica carriers as delivery systems can enhance kaempferol bioavailability and antioxidant activity.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Silviya Boycheva, Denitza Zgureva-Filipova, Cyril Popov, Hristina Lazarova, Margarita Popova
Summary: This study investigates the modification of coal fly ash zeolites (CFAZ) through microwave plasma surface treatment, which enhances their catalytic activity in total VOC oxidation. The results show that different treatment times and plasma agents have varying effects on the properties and structure of the samples, with CHF3 favoring catalytic activity and SF6 inhibiting it. The development of low-cost and efficient catalysts is crucial for conserving critical raw materials and utilizing coal ash resources.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Polymer Science
Zornica Todorova, Ivanka Nikolova, Margarita Popova, Petar Grozdanov, Daniela Karashanova, Neli Koseva
Summary: In this study, two modification pathways were used to enrich the eggshell membrane surface with glucopyranosyl units, resulting in improved protein recognition and reduced bacterial adhesion. The modified membranes demonstrated distinct functional properties, making them promising for various applications in biotechnology and materials science.
POLYMER INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Oyundari Tumurbaatar, Hristina Lazarova, Margarita Popova, Violeta Mitova, Pavletta Shestakova, Neli Koseva
Summary: SBA-15 and MCM-48 mesoporous silicas were modified with functionalized (3-aminopropyl)triethoxysilane (APTES) using the post-synthesis method, introducing N- and P-containing groups to the pore surface. The structure of the newly synthesized modifiers and their grafting onto the porous matrix were confirmed by multinuclear NMR and FTIR spectroscopies. The modified silicas exhibited enhanced CO2 adsorption capacity compared to the initial material, with stable performance observed over three adsorption/desorption cycles.
Article
Biochemistry & Molecular Biology
Margarita Popova, Ivalina Trendafilova, Manuela Oykova, Yavor Mitrev, Pavleta Shestakova, Magdolna R. Mihalyi, Agnes Szegedi
Summary: Monometallic and bimetallic catalysts supported on KIT-6 based mesoporous silica/zeolite composites were prepared and characterized. The bimetallic CuNi-KIT-6 catalyst showed high stability and conversion rate in gas-phase reactions.
Article
Chemistry, Multidisciplinary
Ivalina Trendafilova, Ralitsa Chimshirova, Denitsa Momekova, Hristo Petkov, Neli Koseva, Penka Petrova, Margarita Popova
Summary: Biologically active substances of natural origin are a promising alternative for treating skin diseases. The limitations of low water solubility and bioavailability in natural compounds can be overcome by developing suitable delivery systems. In this study, a silver-modified mesoporous silica nanocarrier was prepared using the template exchange procedure. The drug-loaded formulation showed high loading efficiency, and the interaction between drugs and carriers was studied. The release experiments demonstrated improved solubility, and the formulations exhibited potent antiradical, antioxidant, and antibacterial activities. The simultaneous delivery of curcumin and capsaicin showed enhanced antiproliferative effects on maligning cells. These findings suggest that the developed delivery systems have promising potential for dermal treatment.
Article
Biochemistry & Molecular Biology
Ivalina Trendafilova, Manuel Ojeda, John M. Andresen, Alenka Ristic, Momtchil Dimitrov, Natasa Novak Tusar, Genoveva Atanasova, Margarita Popova
Summary: Transition metals as catalysts for total VOC oxidation at low temperatures are challenging. This study prepared and tested iron-modified SBA-15, AlSBA-15, and ZrSBA-15 materials with varying Fe loading for toluene oxidation. The results showed that increasing Fe loading improved the oxidation rate and decreased the temperature required for complete toluene removal. Surface properties of the mesoporous support influenced the type and localization of iron oxide species, and 5 wt. % Fe-containing ZrSBA-15 exhibited excellent activity in the total oxidation of toluene at lower temperatures due to the synergistic effect of Fe-Zr and the presence of accessible and stable Fe2+/Fe3+ active sites.
Article
Chemistry, Physical
Margarita Popova, Manuela Oykova, Momtchil Dimitrov, Daniela Karashanova, Daniela Kovacheva, Genoveva Atanasova, Agnes Szegedi
Summary: Mono- and bimetallic Ni- and Ru-modified micro-mesoporous ZSM-5 catalysts were prepared and their physicochemical properties were studied. The results showed that the zeolite structure and modification procedure influenced the formation, dispersion, and reducibility of metal oxides. Nickel dispersion was higher and more reducible in the presence of ruthenium in bimetallic catalysts. In CO2 hydrogenation to methane, 10Ni5RuZSM-5 material exhibited the highest activity and selectivity.
Article
Chemistry, Multidisciplinary
Mia Stankovic, Margarita Popova, Matjaz Mazaj, Goran Drazic, Andraz Suligoj, Nigel van de Velde, Mojca Opresnik, Zeljko Jacimovic, Natasa Novak Tusar, Natasa Zabukovec Logar
Summary: This study reveals the potential of waste metal-loaded zeolite generated through wastewater treatment as an effective catalyst for removing volatile organic compounds (VOCs) from air. The thermally treated natural zeolite Clinoptilolite showed good catalytic performance in toluene oxidation and cycling stability.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Applied
Silviya Boycheva, Agnes Szegedi, Karoly Lazar, Cyril Popov, Margarita Popova
Summary: The coal fly ash zeolites with increased iron oxide content were prepared and modified using radiofrequency plasma treatment. The plasma-modified iron-enriched zeolite showed high catalytic activity for VOC oxidation. The CO2 adsorption capacity of the plasma-modified zeolite under dynamic conditions was also investigated.
Article
Chemistry, Analytical
Silviya Boycheva, Kristina Chakarova, Mihail Mihaylov, Konstantin Hadjiivanov, Margarita Popova
Summary: This study found that calcium has a positive effect on the carbon capture capacity of coal fly ash zeolites, increasing their adsorption capacity. It raises an important question regarding coal ash classification for the synthesis of zeolites with carbon capture applications.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)