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
Engineering, Environmental
Davide Bernasconi, Caterina Caviglia, Enrico Destefanis, Angelo Agostino, Renato Boero, Nicoletta Marinoni, Costanza Bonadiman, Alessandro Pavese
Summary: In this study, correlations between heavy metal content, particle size, speciation distribution, and water leaching in fly ash from municipal solid waste incineration were investigated. The results showed that heavy metal leaching is strongly related to speciation distribution and surface complexation on Al/Fe (hydr)oxide. The study also suggests that differences in speciation distribution, rather than heavy metal content or particle size, govern leaching potential in MSWI-FA.
Article
Environmental Sciences
Weifang Chen, Yegui Wang, Yimo Sun, Guilin Fang, Yonglun Li
Summary: The study compared the washing effects of deionized water and Na2CO3 solution on municipal solid waste incineration fly ash. The results showed that Na2CO3 washing could reduce the content of Cl- and SO42-, increase the content of CaO, SiO2, Al2O3, and enhance the stability of heavy metals, making the fly ash suitable for reuse.
Article
Environmental Sciences
Chengcheng Fan, Baomin Wang, Yi Xu, Hainan Ma, Ze Liu
Summary: This study investigates the physicochemical and pollution characteristics of MSWI fly ash under different size distributions and finds that size distribution plays an important role in heavy metal enrichment. The results reveal that as the particle size decreases, the surface shape of MSWI fly ash becomes more regular and the deposition of heavy metals increases on fine particles. Residual and carbonate fractions are the main chemical speciation of heavy metals in MSWI fly ash. Further research is needed to clarify the influence of the incineration process, municipal waste composition, and other factors on MSWI fly ash performances.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
Xiaodong Ma, Tingshu He, Yongqi Da, Yongdong Xu, Zhenmin Wan
Summary: Incineration fly ash contains a significant amount of chloride, which hinders its resource utilization. Water washing effectively removes chlorides and soluble substances, increasing its disposal capacity. The study on the properties of water-washed incineration fly ash provides theoretical guidance for its safe disposal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
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
Chengcheng Fan, Baomin Wang, Hongmei Ai, Yi Qi, Ze Liu
Summary: The study found that using coal fly ash-based geopolymer for MSWI fly ash S/S treatment performed better than Portland cement, with higher compressive strength and higher immobilization rates for heavy metals.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Lorien Luyckx, Jo Van Caneghem
Summary: This study investigates the influence of adding chemicals to sewage sludge prior to incineration on the ash mineralogy and the extraction of phosphorus (P) and heavy metals. Results show that adding chemicals changes the P mineralogy, but has little effect on P extraction efficiency. However, it significantly affects the extraction of heavy metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)
Review
Green & Sustainable Science & Technology
Juan Wang, Xuejing Wang, Guoxue Li, Jingtao Ding, Yujun Shen, Di Liu, Hongsheng Cheng, Ying Zhang, Ran Li
Summary: This review examines the methods for speciation analysis of heavy metals in organic fertilizers and summarizes the factors affecting their distribution. It provides guidance for optimizing the sequence extraction procedure of heavy metals in organic fertilizers.
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
Engineering, Chemical
Mirjam Wolffers, Gisela Weibel, Urs Eggenberger
Summary: The study indicates that treatment with acid fly ash leaching can effectively reduce heavy metal and Cr(VI) content in waste wood fly ash, but requires a significant consumption of neutralizing chemicals. Co-processing waste wood fly ash with municipal solid waste incineration fly ash may help mitigate negative effects during treatment.
Article
Energy & Fuels
Xing Chuai, Qinghua Yang, Tiantian Zhang, Yongchun Zhao, Jiang Wang, Guodong Zhao, Xiangzheng Cui, Yili Zhang, Tianle Zhang, Zhuo Xiong, Junying Zhang
Summary: Fly ash from municipal solid waste incineration (MSWI) is classified as hazardous waste due to its high content of heavy metals, dioxins, and other hazardous substances. This study investigated the physical and chemical properties, enrichment pattern, fugacity pattern, and leaching toxicity of four types of MSWI fly ash. The results showed that the content and distribution of heavy metals were influenced by particle size and the injection of CaO.
Article
Biotechnology & Applied Microbiology
Sekgele Bobby Taupedi, Venecio U. Ultra
Summary: The potential of Morupule fly ash as a soil amendment was evaluated by planting spinach and rape vegetables successively in Palapye soils added with different percentages of fly ash and various nutrient sources. The application of fly ash increased soil pH, electrical conductivity, and the total concentration of certain heavy metals, while compost increased the total concentration of zinc. Fly ash significantly reduced the available concentration of certain heavy metals in the soil. The best combination for yield and safe levels of heavy metals in the edible shoots was 10% fly ash combined with compost and fertilization.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Green & Sustainable Science & Technology
Justyna Szerement, Alicja Szatanik-Kloc, Renata Jarosz, Tomasz Bajda, Monika Mierzwa-Hersztek
Summary: Zeolites are extensively studied materials for adsorption and ion exchange with wide applications in agriculture and environmental protection. Natural zeolites are widely researched as soil conditioners and fertilizer additives in agriculture, while synthesized zeolites are gaining attention in environmental remediation. Despite numerous studies on zeolites' applications in environmental protection, their full potential is yet to be fully explored.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Juanjuan Qi, Fenfen Zhu, Xiang Wei, Luyao Zhao, Yiqun Xiong, Xuemin Wu, Fawei Yan
Article
Engineering, Environmental
Fenfen Zhu, Yiqun Xiong, Yingying Wang, Xiang Wei, Xuemei Zhu, Fawei Yan
Article
Engineering, Environmental
Ya Pang, Guangming Zeng, Lin Tang, Yi Zhang, Yuanyuan Liu, Xiaoxia Lei, Zhen Li, Jiachao Zhang, Zhifeng Liu, Yiqun Xiong
CHEMICAL ENGINEERING JOURNAL
(2011)
Article
Energy & Fuels
Fenfen Zhu, Luyao Zhao, Huimin Jiang, Zhaolong Zhang, Yiqun Xiong, Juanjuan Qi, Jiawei Wang
Article
Chemistry, Multidisciplinary
Guangming Zeng, Ya Pang, Zhuotong Zeng, Lin Tang, Yi Zhang, Yuanyuan Liu, Jiachao Zhang, Xiaoxia Lei, Zhen Li, Yiqun Xiong, Gengxin Xie
Article
Engineering, Environmental
Yiqun Xiong, Masaki Takaoka, Akira Sano, Taketoshi Kusakabe, Jing Yang, Kenji Shiota, Takashi Fujimori, Kazuyuki Oshita
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Environmental Sciences
Yiqun Xiong, Masaki Takaoka, Taketoshi Kusakabe, Kenji Shiota, Kazuyuki Oshita, Takashi Fujimori
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2020)
