Article
Chemistry, Physical
Tao Hui, Hong Juan Sun, Tong Jiang Peng
Summary: Cordierite-based ceramic foams were prepared using asbestos tailings and coal fly ash without additional fluxing agents, showing improved crystallinity when 17.5% alumina was added. The addition of yellow sand not only supplemented silicon sources in the raw materials, but also reduced the synthesis temperature of cordierite. The optimal formula S4 sintered at 1250 degrees C for 30 min showed promising physical and mechanical properties for potential applications in high-temperature exhaust gas treatment and special waste water remediation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Zhikun Zhang, Zhichuan Li, Yibo Yang, Boxiong Shen, Jiao Ma, Lina Liu
Summary: In this study, municipal solid waste incineration fly ash was recycled into environmentally friendly glass-ceramics. The effects of different parameters on the crystalline phases, mechanical properties, and heavy metals leaching of the glass-ceramics were investigated. The results showed that the glass-ceramics exhibited stable crystalline phases, good mechanical properties, high alkali resistance, and low potential ecological risk, indicating their potential application feasibility.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Li Zeng, Hongjuan Sun, Tongjiang Peng
Summary: The addition of borax in coal fly ash can change the network structure, promote the formation of liquid phase, and increase the porosity of porous glass-ceramics, providing an experimental basis for energy-saving preparation of porous glass-ceramics.
FRONTIERS IN CHEMISTRY
(2022)
Article
Environmental Sciences
Yongya Wang, Xinyi Huang, Wei Wang, Tao Wu
Summary: This study investigates the factors influencing the leaching toxicity of heavy metals in glass ceramics made from MSWI fly ash and andesite tailings. The results show that the content and distribution state of the heavy metals greatly affect their leaching toxicity in the glass ceramics.
Article
Materials Science, Ceramics
Wenxing Shang, Zhiwei Peng, Fuchun Xu, Huimin Tang, Mingjun Rao, Guanghui Li, Tao Jiang
Summary: This study proposed a new approach to prepare high-quality enstatite-spinel based glass-ceramics from a mixture of ferronickel slag (FNS) and coal fly ash (CFA). By examining the effect of CFA content on the preparation process, the study showed that controlling the crystallization process can achieve excellent product properties.
CERAMICS INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Xuexue Wang, Kongyun Zhu, Lei Zhang, Aimin Li, Fahim Ullah, Chuanshuai Chen, Jiaxing Huang, Yulin Zhang
Summary: A new method was proposed to produce glass-ceramics from fly ash and coal fly ash with enhanced properties. Results showed that the addition of coal fly ash improved heavy metal stabilization and compressive strength increased with pretreatment pressure.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Penghui Guo, Zekun Zhao, Yongkui Li, Yabin Zhang, Tao He, Xinmei Hou, Suqin Li
Summary: This study investigates the optimization, mechanism, and assessment of the co-utilization of iron ore tailings and coal fly ash for the production of porous ceramsite. The prepared ceramsite exhibits exceptional porosity and mechanical properties, and is both ecologically feasible and economically rewarding. This research provides an innovative strategy for the co-utilization of industrial by-products, with advantages in cost-effectiveness, ecological feasibility, and scalability of production.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Qichen Li, Ting Xiong, Jun Liao, Yong Zhang
Summary: Porous coal fly ash aerogels with different sizes of coal fly ash were synthesized as uranium adsorbents. The PCFAA-1250 prepared with 1250 mesh coal fly ash showed excellent adsorption performance and recyclability, with a maximum adsorption efficiency of up to 96.5%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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
Li Zeng, Hongjuan Sun, Tongjiang Peng, Tao Hui
Summary: Coal fly ash and waste glass were used to prepare CaO-Al2O3-SiO2 system glass-ceramics by direct sintering, and increasing glass content can decrease activation energy, increase flexural strength and bulk density, suitable for high-strength building applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
Patrick N. Lemougna, Juho Yliniemi, Adeolu Adediran, Tero Luukkonen, Pekka Tanskanen, Mikko Finnila, Mirja Illikainen
Summary: The study developed porous ceramic materials from glass wool waste and spodumene tailings with silica carbide as a pore-forming agent, resulting in compressive strength ranging from 5 to 30 MPa. These materials could potentially be used in filtering or high-rise building applications.
CERAMICS INTERNATIONAL
(2021)
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
Chemistry, Multidisciplinary
Xiang Liao, Long Chen, Yan Xie, Jianjie Tan, Xiang Luo, Haifeng Li
Summary: This study prepared lightweight thermal insulation materials for buildings by using the melt foaming method to solve the problem of reducing waste quantity and increasing utilization of HSTs. The effects of calcination temperature and holding time on melting characteristics were investigated. The amount of foaming agent's impact on bulk density, total porosity, and thermal conductivity were determined, and a thermal conductivity model structure was elucidated. The results showed that porous ceramics with optimal performance were prepared at a calcination temperature of 1200°C for 30-60 minutes, with a melt index of 8 k and 0.52 wt% of added SiC foaming agent. The bulk density, total porosity, and thermal conductivity of the prepared porous ceramics were 0.196 g cm(-3), 93.8%, and 0.086 W m(-1) K-1, respectively, with 60 wt% of added HSTs. The study's findings are of economic significance for the reuse of HSTs at large dosages and with high added value.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Engineering, Environmental
Yanfang Liu, Zhiqiang Wang, Wenhui Zhao, Jili Hou, Longpeng Cui, Liang Zou, Chenghao Li, Hongwei Li, Yu Wu, Run Xu, Yongfa Zhu
Summary: The preparation of hierarchical porous nanosilica using coal gasification fly ash as a silicon source was achieved by microwave-assisted alkaline extraction followed by hydrothermal synthesis. This method showed fast and efficient silicon extraction with less impurity metal ions. The use of specific compounds as swelling agents induced intergranular pores, which significantly improved the CO2 adsorption capacity of the nanosilica. The isosteric heat of adsorption indicated the presence of both physisorption and chemisorption in the adsorption process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Hanaa Hajjou, Kamal Tabit, Latifa Saadi, Mohamed Waqif
Summary: In this study, cordierite-based ceramics were prepared from stevensite-rich clay or coal fly ash (CFA) and stevensite-rich clay using a solid-state interaction process. The effects of heating temperature and starting materials on the microstructure and mechanical strength were investigated. The addition of CFA to stevensite-rich clay enhanced its reactivity and increased the mechanical strength from 5 MPa to 15 MPa at 1200 degrees C.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(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.