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
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
Engineering, Environmental
Mi Yan, Xiaoqiang Wen, Yansong Sun, Zhihao Zhou, Jiahao Jiang, Ruixiong Hu, Yan Zhang, Dwi Hantoko
Summary: Desalination coupled with heavy metal solidification was investigated for the treatment of fly ash from hazardous waste incineration. Sintering not only reduces the bulk density of fly ash but also can reduce heavy metal leaching toxicity. The treated ash can meet the leaching limit of heavy metals for the flexible landfill in China, significantly saving landfill space.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
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
Materials Science, Ceramics
Yibo Yang, Xuexue Wang, Jiao Ma, Lina Liu, Boxiong Shen, Zhikun Zhang
Summary: In this study, bottom ash from hazardous oil sludge incineration was utilized to prepare SiO2-Al2O3-CaO system glass-ceramics with the addition of waste glass wool (GW). The effects of basicity and sintering temperature on the properties and potential toxicity of glass-ceramics were investigated. The results demonstrated that glass-ceramics with a basicity of 0.88 and sintering temperature of 950 degrees C exhibited the best comprehensive properties and showed excellent solidification effect on heavy metals.
CERAMICS INTERNATIONAL
(2023)
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
Biochemistry & Molecular Biology
Facun Jiao, Xulong Ma, Tao Liu, Chengli Wu, Hanxu Li, Zhongbing Dong
Summary: The study found that thermal treatment of municipal solid waste incineration fly ash in a reducing atmosphere can promote ash melting and prevent heavy metal vaporization.
Review
Environmental Sciences
Ewelina Grabias-Blicharz, Wojciech Franus
Summary: This review article focuses on the mechanochemistry of coal fly ash (CFA) and highlights the issue of fly ash from municipal solid waste (MSW). Fly ash is primarily used in the construction industry, chemical synthesis, and environmental engineering. However, the recycling rate for fly ash is low, and most of it ends up being landfilled. Mechanochemical processing of fly ash offers an eco-friendly, inexpensive, and efficient method for utilizing this abundant waste material.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Wenxing Shang, Zhiwei Peng, Yawen Huang, Foquan Gu, Jian Zhang, Huimin Tang, Lei Yang, Weiguang Tian, Mingjun Rao, Guanghui Li, Tao Jiang
Summary: CMAS glass-ceramics, using metallurgical slags as raw materials, have potential for economic and environmental benefits. This study provided a systematic review of preparation methods, challenges, and solutions for utilizing metallurgical slags in producing CMAS glass-ceramics.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Yali Chang, Jianwei Cao, Wenfeng Song, Zhi Wang, Chenyang Xu, Mengzhuo Long
Summary: This study developed a new CaO-Al2O3-SiO2-SO3 glass for immobilizing multiple heavy metals in dechlorinated fly ash. It was found that increasing the (CaO + SO3)/SiO2 mass ratio reduced the proportions of unstable Mn, Ni, and Zn, while a certain ratio of 0.51 minimized the proportions of unstable Cr and Pb. Decreasing the degree of polymerization increased the proportions of Mn, Cr, Ni, Pb, and Zn in the carbonate bound state. Leaching of metals in this state was the main cause of degradation in the glassy network structure. The amounts of Mn in the iron-manganese oxide bound state increased with the number of Q(2) units in the silicate network. Decreasing the CaO/SiO2 mass ratio raised the proportions of unstable Mn, Ni, and Zn, while a ratio of 0.43 lowered the proportions of unstable Cr and Pb. Principal components analysis revealed that the leaching of toxic heavy metals from the glass was primarily correlated with their proportions in the unstable state, and not in the stable states.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Construction & Building Technology
Yuyang Long, Kai Pu, Yuqiang Yang, HuanLin Huang, Haoyu Fang, Dongsheng Shen, Hairong Geng, Jinmu Ruan, Foquan Gu
Summary: This study evaluates the feasibility of preparing high-strength ceramics from incineration fly ash (FA) and clay. The theoretical analysis and experimental verification showed that mixing FA and clay can promote the sintering process and result in the formation of anorthite, which is a desirable phase for ceramsite. The experimental results demonstrated that the obtained ceramsite with 40 wt% FA, sintering temperature of 1200 degrees C, and holding time of 20 min met the quality requirements of lightweight aggregates.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. Csaki, I. Stubna, T. Kaljuvee, P. Dobron, F. Lukac, A. Trnik
Summary: The electrical properties during firing of anorthite ceramic prepared from mixtures of illitic clay and fly ashes with high CaO content were investigated. The results showed that the addition of fly ashes decreased the shrinkage of the ceramics and introduced additional mineral phases. Ca2+ ions became the dominant charge carriers, and the electrical conductivity and relative dielectric constant were influenced by the content of fly ashes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Mingwei Liu, Xin Yang, Jingbo Guo, Lanhe Zhang
Summary: By adding fly ash, high-quality silicon carbide foam ceramics were successfully fabricated at a low sintering temperature, which significantly reduced the fabrication cost and enhanced the commercial application.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Shuxia Bai, Mo Chu, Lingmei Zhou, Zhibing Chang, Chao Zhang, Baoman Liu
Summary: This paper synthesized zeolite from a combination of oil shale ash and coal fly ash, and used it to remove heavy metals from aqueous solution. The structural characterization of the product was done through XRD and SEM, which proved that the ashes can be converted into zeolite. The adsorption performance of the synthetic zeolite for heavy metals was evaluated through batch experiments. The results showed that the adsorption followed the pseudo-second-order kinetics model and the Langmuir isotherm model described the isotherm data well. Based on equilibrium studies, the selectivity sequence for heavy metal adsorption was determined. XPS results indicated that the mechanism of heavy metal removal by the synthetic zeolite was ion exchange.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
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.