Article
Materials Science, Multidisciplinary
Junjie Zhang, Xiaoyan Zhang, Bo Liu, Christian Ekberg, Shizhen Zhao, Shengen Zhang
Summary: In this study, municipal solid waste incineration products of bottom ash, fly ash, and pickling sludge were transformed into glass ceramic foams using CaCO3 as a pore-foaming agent. The effect of the ratio of bottom ash to fly ash on various properties was investigated, and it was found that the glass phase content and certain units decreased with the increase in the ratio. Glass ceramic foams with uniform spherical pores were successfully fabricated, and when the contents of bottom ash, fly ash, and pickling sludge were 35wt%, 45wt%, and 20wt%, respectively, high-performance foams with desirable properties were obtained.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Environmental Sciences
Junjie Zhang, Bo Liu, Xiaoyan Zhang, Hanlin Shen, Jun Liu, Shengen Zhang
Summary: The co-vitrification of MSWI fly ash and bottom slag was achieved in this study, and glass ceramic foams were produced using an alkaline activation-crystallization method. The results showed that increasing the proportion of MSWI fly ash led to significant changes in the Si-O bonds in the glass and reduced crystallization ability. However, extending the crystallization time promoted the development of a pore structure. The prepared samples had low leaching concentrations of toxic heavy metals and exhibited good physical properties.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Materials Science, Ceramics
Hong-Yang Wang, Yu Li, Shu-Qiang Jiao, Kuo-Chih Chou, Guo-Hua Zhang
Summary: Diopside-based CaO-MgO-Al2O3-SiO2 glass-ceramic was prepared from biomass fly ash by powder sintering method. The crystallization behavior was controlled by surface crystallization, with diopside as the major crystalline phase. The mechanical properties of the glass-ceramic were improved by prolonging the sintering time at 830°C, but deteriorated with increased sintering time at 850°C due to increased pore sizes. The glass-ceramic sintered at 920°C for 1 hour showed the highest bending strength of 212 MPa.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Junjie Zhang, Bo Liu, Xiaoyan Zhang, Hanlin Shen, Jun Liu, Shengen Zhang
Summary: A novel technology based on alkali activation-crystallization strengthening was developed for the fabrication of glass ceramic foams with hierarchical pores. The effects of solid-liquid ratio and NaOH concentration on the pore structure, phase evolution and physical properties were investigated. The prepared samples exhibited high porosity, adequate compressive strength and bulk density.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Zhenyu Hao, Hai Zhang, Xiaoli Tang, Lihua Sui, Yanan Li, Shucai Zhang
Summary: This study investigated the crystallization kinetics and stabilization behavior mechanism of different heavy metals in glass-ceramics produced using petrochemical incineration fly ash. The results showed that it is easier to produce the glass ceramics at a temperature of around 850°C, with a low crystallization activation energy of 121.49 kJ/mol. The heavy metals were well solidified and the leaching concentration was significantly lower than the limit specified by governmental agencies, indicating the potential and reliability of converting hazardous petrochemical incineration fly ash into environmentally friendly glass ceramics.
FRONTIERS IN CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Cosmin Vancea, Giannin Mosoarca, Simona Popa, Mircea Dan, Sorina Boran
Summary: This paper proposes an alternative method of recycling cathode ray tube (CRT) glass waste by combining it with fly ash and kaolin to produce new glass ceramic materials. The study investigates the impact of the fly ash/CRT waste ratio on various properties of the materials, such as firing shrinkage, apparent density, porosity, chemical stability, and compression strength. The results demonstrate that the proposed method yields glass ceramics with favorable properties for outdoor paving applications, including good dimensional stability, high density, low porosity, excellent chemical stability, and satisfactory compression strength.
Article
Materials Science, Ceramics
H. Cengizler, M. Koc, O. San
Summary: In this study, ceramic glass foam/foams (CGF) were successfully produced using a simple conventional sintering method with Na2SiO3 as a foaming and fluxing agent. The effects of different fly ashes, Na2SiO3 ratios, and sintering conditions on the properties and microstructure of the CGF were systematically investigated. The research showed that CGF produced from Tuncbilek fly ash achieved a foam structure at 1100 degrees C, while CGF from Seyitomer fly ash required 1150 degrees C.
CERAMICS INTERNATIONAL
(2021)
Article
Construction & Building Technology
Bingchuan Cheng, Rentai Liu, Xiuhao Li, Enrique del Rey Castillo, Mengjun Chen, Shucai Li
Summary: Increasing FA/CBA values can improve the performance of backfill materials, but the excellent water retention of CBA may reduce drainage capacity. A 0.5% superplasticizer and a 30%-50% FA/CBA ratio can meet the requirements and have been applied in a filling mining project.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Mitali Nag, Dania Labira, Takayuki Shimaoka, Hirofumi Nakayama, Teppei Komiya
Summary: The aim of this study was to examine the effect of size-fractionated bottom ash (BA) in immobilizing heavy metals in fly ash (FA), in order to enhance the effective utilization of resources. The results showed that both BA fractions significantly immobilized Pb and Zn through carbonation and pozzolanic reactions. This technique can minimize the amount of raw materials required, reduce waste sent to landfills, and create a new material for reuse.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Junjie Zhang, Marta Filipa Simo, Jixin Deng, Zhisheng Shi, Yang He, Quan Wen, Hanlin Shen, Andre Antunes, Shengen Zhang
Summary: The method of preparing glass ceramic foams from secondary aluminum ash (SAA) was proposed, and the comprehensive utilization of SAA was achieved through thermodynamic phase diagram and viscosity calculation, resulting in glass ceramic foams with hierarchical pore structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Seyedsaeid Hosseini, Nicholas A. Brake, Mohammad Nikookar, Ozge Gunaydin-Sen, Haley A. Snyder
Summary: Mechanochemical activation of sub-bituminous coal bottom ash with fly ash and sodium silicate powder can improve compressive strength and microstructural properties of geopolymers.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Materials Science, Ceramics
Viviane Oliveira Soares, Francisco Carlos Serbena, Gabriel dos Santos Oliveira, Crislaine da Cruz, Robson Ferrari Muniz, Edgar Dutra Zanotto
Summary: This study successfully developed a transparent nanostructured glass-ceramic material with high transparency and nanocrystals using a two-stage heat treatment method. The material has nanocrystals smaller than 50 nm, high transmittance and hardness, suitable for various applications.
CERAMICS INTERNATIONAL
(2021)
Article
Construction & Building Technology
Qibin Yuan, Dilan Robert, Abbas Mohajerani, Phuong Tran, Biplob Kumar Pramanik
Summary: This study investigates the efficient and novel use of high calcium municipal solid waste incineration fly ash (MSWI FA) in the manufacturing of ceramic tiles. The results show that the addition of 3 wt% - 15 wt% MSWI FA can achieve comparable or superior technical performance to the control sample, while meeting the heavy metal leachate limits specified by national standards. This has the potential for a sustainable tile manufacturing process and energy savings in the firing process, providing an efficient way to manage MSWI wastes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Shi-Zhen Zhao, Xiao-Yan Zhang, Bo Liu, Jun-Jie Zhang, Han-Lin Shen, Shen-Gen Zhang
Summary: By utilizing MSWI fly ash and waste glass, glass-ceramics with high chloride content were successfully developed, achieving optimal results in terms of hardness and bending resistance.
Article
Environmental Sciences
Mitali Nag, Takayuki Shimaoka
Summary: This study proposed a new method of immobilizing lead and zinc in fly ash by using the fine-fraction of municipal solid waste incineration bottom ash as a pozzolan. The leaching concentrations of heavy metals significantly reduced in the stabilized fly ash samples. This technology can save original material, produce inert material, and avoid landfilling of incineration residues. More advanced and detailed experiments are needed to optimize the proposed technology for industrial application.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Computer Science, Interdisciplinary Applications
Hoang Nguyen, Xuan-Nam Bui, Quang-Hieu Tran, Hoa Anh Nguyen, Dinh-An Nguyen, Le Thi Thu Hoa, Qui-Thao Le
Summary: This paper introduces a novel hybrid model combining MARS, PSO, and MLP algorithms to enhance the prediction of peak particle velocity in mine blasting. The proposed MARS-PSO-MLP model outperformed stand-alone models and achieved the highest accuracy and reliability.
ENGINEERING WITH COMPUTERS
(2022)
Article
Computer Science, Interdisciplinary Applications
Hong Zhang, Hoang Nguyen, Xuan-Nam Bui, Biswajeet Pradhan, Panagiotis G. Asteris, Romulus Costache, Jagannath Aryal
Summary: In this study, a new artificial intelligence model was proposed for predicting the friction angle of clays from different areas. Through various tests and comparisons, it was found that this model can accurately predict the friction angle of clays from different regions.
ENGINEERING WITH COMPUTERS
(2022)
Correction
Computer Science, Artificial Intelligence
Hoang Nguyen, Xuan-Nam Bui, Hoang-Bac Bui, Ngoc-Luan Mai
NEURAL COMPUTING & APPLICATIONS
(2021)
Article
Geosciences, Multidisciplinary
Xuan-Nam Bui, Hoang Nguyen, Quang-Hieu Tran, Dinh-An Nguyen, Hoang-Bac Bui
Summary: The study aimed to predict the intensity of ground vibration induced by mine blasting operations to reduce severe damages to the surroundings. A novel CSO-ANN model was proposed and validated based on 118 blasting events, showing that the CSO algorithm significantly improved the performance of the ANN model.
NATURAL RESOURCES RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Ning Li, Hoang Nguyen, Jamal Rostami, Wengang Zhang, Xuan-Nam Bui, Biswajeet Pradhan
Summary: The study focused on predicting rock displacement in tunnels and underground mines by analyzing various rock properties and developing two novel soft computing models, which outperformed conventional models. It was found that the depth of tunnels, monitoring distance, observation time, and angle of rock layers were the most influential parameters for predicting rock displacement.
Article
Engineering, Geological
Li Shang, Hoang Nguyen, Xuan-Nam Bui, Thai Ha Vu, Romulus Costache, Le Thi Minh Hanh
Summary: This study proposed state-of-the-art techniques in predicting and controlling slope stability in open-pit mines using limit equilibrium analysis, artificial neural networks, and optimization algorithms. The optimized BSO-RBFNN model showed high accuracy and reliability in predicting slope stability, outperforming other models tested in the study.
Article
Environmental Studies
Xiaolei Zheng, Hoang Nguyen, Xuan-Nam Bui
Summary: This study explored the relationship between production factors, ore grades, and life of mine to forecast mining capital cost (MCC) for open pit mining projects. The developed SalpSO-CFNN model showed good accuracy with a mean absolute error of 179.567, root-mean-squared error of 248.401, and determination coefficient of 0.980, outperforming other benchmark models. Sensitivity analysis indicated that MineAP and MillAP were the most influential parameters on the forecast of MCC.
Article
Environmental Studies
Hong Zhang, Hoang Nguyen, Diep-Anh Vu, Xuan-Nam Bui, Biswajeet Pradhan
Summary: This study developed several forecast models for monthly copper prices using various machine learning algorithms, and found that the MLP neural network is the most reliable method. Additionally, the currency exchange rates of countries with the highest copper production significantly affect the volatility of monthly copper prices.
Article
Engineering, Industrial
Weixun Yong, Wengang Zhang, Hoang Nguyen, Xuan-Nam Bui, Yosoon Choi, Trung Nguyen-Thoi, Jian Zhou, Trung Tin Tran
Summary: The construction of metropolises in smart cities is a trend in developed countries, but it may cause damages to the surrounding structures. To ensure the safety of the surrounding structures, diaphragm walls have been applied to prevent deformation or collapse. This study proposes two intelligent models based on the finite element method and metaheuristic algorithms to predict the deflection of diaphragm walls induced by deep braced excavations. The results show that the proposed models, MLP-HHO and MLP-WO, provide high accuracy in predicting diaphragm wall deflection.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2022)
Article
Environmental Studies
Yosoon Choi, Hoang Nguyen, Xuan-Nam Bui, Trung Nguyen-Thoi
Summary: This study proposed the HHO-SVM model to predict the performance of truck-haulage systems in open-pit mines, with radial basis function identified as the best fit. Validation data demonstrated that the HHO-SVM model has high accuracy rates.
Article
Energy & Fuels
Hoang Nguyen, Xuan-Nam Bui, Erkan Topal
Summary: This paper presents a method for predicting blast-induced ground vibration in open-pit mines using self-organizing neural networks (SONIA) and metaheuristic algorithms. The SONIA model was improved by employing metaheuristic algorithms including MRFO, HGS, AO, and NMRA. The study evaluated the effectiveness of the method using a case study of an open-pit coal mine in Vietnam and found that the MRFO-SONIA model provided the most reliable and accurate predictions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Engineering, Industrial
Hoang Nguyen, Xuan-Nam Bui, Erkan Topal
Summary: This study develops three intelligent models, SpaSO-ELM, MFO-ELM, and SalSO-ELM, based on metaheuristic algorithms and ELM model, to predict the ground vibration intensity in mine blasting. These models demonstrate high reliability and accuracy in predicting peak particle velocity (PPV) and can ensure the safety of the surroundings in open-pit mines.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Proceedings Paper
Engineering, Environmental
Van-Duc Nguyen, Chang-Woo Lee, Xuan-Nam Bui, Pham Van Chung, Quang-Tuan Lai, Hoang Nguyen, Tran Thi Huong Hue, Van-Trieu Do, Ji-Whan Ahn
Summary: At COP26, more than 190 world leaders gathered to address climate change. Vietnam's Government committed to achieving net-zero carbon emissions by 2050. To achieve this goal, Vietnam needs to focus on low-carbon sustainable development technologies, with CCUS technology being a suitable option.
ADVANCES IN GEOSPATIAL TECHNOLOGY IN MINING AND EARTH SCIENCES
(2023)
Proceedings Paper
Engineering, Environmental
Xuan-Nam Bui, Chang Woo Lee, Hoang Nguyen
Summary: This paper introduces a state-of-the-art technology for modeling and controlling dust concentration from blasting operations in open-pit mines. Smart sensors mounted on an unmanned aerial vehicle were used to measure dust concentration in real-time, and meteorological conditions were taken into account. An artificial intelligence model, namely adaptive neuro-fuzzy inference system (ANFIS), was developed using the dataset to forecast PM10 concentration in the quarry. The results showed that the ANFIS model achieved a high accuracy (around 90%) and can be used to evaluate and control the air quality in the entire quarry.
ADVANCES IN GEOSPATIAL TECHNOLOGY IN MINING AND EARTH SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Quang-Hieu Tran, Hoang Nguyen, Xuan-Nam Bui
Summary: This study considers and predicts blast-induced ground vibration (PPV) in open-pit mines using bagging and sibling techniques under the rigorous combination of machine learning algorithms. The results show that the bagging models provided better performance than the empirical models, with BA-ExTree being the best model with the highest accuracy (88.8%).
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Engineering, Environmental
Xiaojian Liu, Bei Wang, Yayun Ma, Xiangyang Zhou, Juan Yang, Yuehui He, Jingjing Tang, Fanyun Su, Wan Yang
Summary: This study proposes a combined process of reduction roasting of herb-medicine residue and oxalic acid leaching to improve the recovery efficiency of lithium from spent lithium-ion batteries. By utilizing the reducing gas produced from the pyrolysis of herb-medicine residue, the layered structure of the cathode powder is destroyed and converted into Li2CO3, Ni, Co, and MnO. Additionally, selective extraction of lithium is achieved using oxalic acid, and the efficiency and kinetics of lithium extraction are improved under the combined action of herb-medicine residue and oxalic acid.
Article
Engineering, Environmental
Muxina Konarova, Nuno Batalha, Gabriel Fraga, Mohamed H. M. Ahmed, Steven Pratt, Bronwyn Laycock
Summary: This study presents a proof of concept for a technology that integrates PET recovery from mixed plastic waste and plastic pyrolysis. By depolymerizing PET into TPA using a low volatility oil as medium, it achieves low-pressure operation and a selective separation and recovery of TPA from the product mix. Full PET conversion and high TPA recovery were achieved, making it an effective solution for processing mixed waste streams and improving the yield and quality of liquid product from thermal pyrolysis compared to untreated feedstock.
Article
Engineering, Environmental
Zhenhua Sun, Jing Li, Xuejiang Wang, Siqing Xia, Jianfu Zhao
Summary: This study investigated the influence of in-situ formed MgFe2O4 on the hydrothermal treatment of swine manure. The results showed that the in-situ formation of MgFe2O4 improved the dehydration and decarboxylation of organic components in swine manure, thereby improving its carbonization degree. Furthermore, it enhanced the stabilization of heavy metals and the retention of phosphorus. MgFe2O4 modified hydrochars exhibited remarkable adsorption capacity for Pb(II) and Cu(II) without any leaching of heavy metals.
Article
Engineering, Environmental
Yijing Jiang, Boyang Leng, Jingxin Xi
Summary: The increased generation of municipal solid waste has had a significant impact on the economy, environment, and public health. The current waste treatment process has limitations. By developing a comprehensive social costing model, this study assesses the impacts of municipal solid waste management throughout its life cycle and provides policymakers with best practices and feasibility information.
Article
Engineering, Environmental
Marina Hernandes de Paula e Silva, Ricardo Coser Mergulha, Jose Geraldo Vidal Vieira, Andrea Brasco Pampanelli, Rodrigo Salvador, Diogo Aparecido Lopes Silva
Summary: This study developed and implemented a self-assessment tool to assist companies in decision-making processes for establishing circular flows based on Lean Manufacturing and Circular Economy principles. The tool utilized a maturity model and was applied to nine companies of varying characteristics. The findings revealed that certain companies showed higher maturity in water-waste and chemical-emissions management, with larger enterprises focusing on these strategies. However, many companies lacked sufficient training and employee awareness prior to seeking cleaner alternatives, and comprehensive actions to manage the product lifecycle were lacking. To address these gaps, the tool provided tailored recommendations for each company to improve their processes, products, and value chain.
Article
Engineering, Environmental
Gamze Dogdu, Turgay Pekdemir, Sanaz Lakestani, Seyda Karabork, Osman Cavus
Summary: This paper presents data on food waste associated with mini size food packaging services, highlighting the difficulties in emptying the food and consumer wastefulness as the main causes. These findings have significant implications for the sustainability of food and relevant packaging.
Article
Engineering, Environmental
Qingxia Li, Xin Kong, Yuxin Chen, Jianan Niu, Jia Jing, Jin Yuan, Yifeng Zhang
Summary: This study investigates how to enhance methane production from food waste after hydrothermal pretreatment. The results demonstrate a significant increase in methane yield when zero-valent iron and magnetite are used together, and high organic loading is favorable for methane production. Microbial diversity analysis further reveals the dominant pathways and metabolic processes involved in methane generation.
Article
Engineering, Environmental
D. H. H. Sim, I. A. W. Tan, L. L. P. Lim, E. T. Lau, B. H. Hameed
Summary: The development of controlled-release fertilizer formulation is important for preventing environmental pollution caused by nutrient leaching and volatilization. This study combined biochar-based fertilizer with encapsulation technology to improve the nutrient release mechanism. Optimal conditions for synthesizing urea-impregnated biochar (UIB) were determined using central composite design, and the release of nitrogen was described by mathematical models. Results showed that encapsulated UIB (EUIB) achieved complete release of nitrogen in water and exhibited improved water retention in sandy-textural soil. Therefore, EUIB derived from peppercorn waste has the potential to be used as a sustainable controlled-release fertilizer for agriculture.
Article
Engineering, Environmental
Yuchuan Wang, Neslihan Akdeniz
Summary: Incorporating biochar into composting systems can increase compost temperatures. This study developed a heat transfer model for a biochar-amended co-composting system and found that biochar increased thermal conductive losses but also enhanced microbial activity, resulting in an overall increase in total heat unit. When biochar was applied on the surface, it mainly functioned as an insulator.
Article
Engineering, Environmental
George Tsalis, Birger Boutrup Jensen, Jessica Aschemann-Witzel
Summary: This paper empirically explores the relationship between retail price promotions and household food waste. The results show that households with a higher proportion of discount food purchases and environmental awareness tend to waste less food, while larger households and those lacking food handling skills tend to waste more food.
Article
Engineering, Environmental
Lukas Friederici, Arne Koch, Patrick Martens, Jana Pantzke, Sebastiano Di Bucchianico, Thorsten Streibel, Christopher P. Rueger, Ralf Zimmermann
Summary: The increasing demand for lightweight materials has led to a rise in fiber-reinforced plastic (FRP) production. However, the properties and compositional range of FRPs pose challenges to recycling strategies. Pyrolysis has emerged as a promising method for separating the fibers from the polymer matrix. This study investigated the pyrolysis process using thermal analysis and high-resolution mass spectrometry, and also assessed the toxicity of the recovered fibers using an in vitro model.
Review
Engineering, Environmental
Devika Kannan, Shakiba Khademolqorani, Nassibeh Janatyan, Somaieh Alavi
Summary: This paper introduces Smart Waste Management (SWM) that applies Industry 4.0 technologies in waste management. A framework called SWM4.0 is developed, which highlights the importance of smart people, smart cities, smart enterprises, and smart factories in achieving successful waste management. The paper also suggests future research directions and managerial implications.
