The migration and transformation mechanisms of heavy metals during molten salt cyclic thermal treatment of MSWI fly ash

Wang, Yicheng; Dong, Lu; Hu, Hongyun; Yan, Dahai; Xu, Sihua; Zou, Chan; Huang, Yongda; Guo, Guangzhao; Yao, Hong

doi:10.1016/j.cej.2023.144731

Cited by 11 publications

(2 citation statements)

References 57 publications

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“…These elements participate in the recirculation between the primary mill/particle filter and the upper preheater stage. Alternative fuels containing relatively high Hg or Tl content, such as MSW, RDF, and sewage sludge, should be minimized use. ,, An additional prospective constraint in the adoption of alternative fuels lies in the ultimate clinker composition, as the clinker incorporates residues from combustion. The choice of fuel may introduce certain constituent materials that have the potential to disrupt the chemical properties of cement materials and impact the overall functioning of the system.…”

Section: Potential Of Biomass As An Alternative Fuelmentioning

confidence: 99%

Recent Advances on the Uses of Biomass Alternative Fuels in Cement Manufacturing Process: A Review

Luo,

Song,

Huang

et al. 2024

Energy Fuels

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The combustion of fossil energy has resulted in the emission of a substantial quantity of greenhouse gases, leading to the occurrence of global warming and a cascade of climate-related issues. Among many fossil energy consuming and heavily polluting processes, cement manufacturing from the precalciner kiln system stands out as a significant contributor. Over the past few decades, a substantial body of research has been conducted with the aim of reducing both the energy consumption and environmental impact associated with this industry through the utilization of alternative fuel sources. The integration of alternative fuels (plastic waste, meat and bone meal, municipal solid waste, refuse-derived fuel, tire-derived fuel, wood waste, etc.) in cement manufacturing has garnered considerable attention due to its efficacy in substituting the thermal energy requirements historically met by fossil fuels (coal, petroleum coke, oil, natural gas, etc.), thereby mitigating greenhouse gases emissions (CO 2 ). The harshly alkaline conditions, elevated temperatures, and prolonged residence time of the rotary kiln facilitate the incineration of a diverse range of waste materials and hazardous substances (municipal solid waste, tirederived fuel, dioxins and furans, heavy metals, etc.). However, alternative fuel still causes many problems. In recent years, with the increasingly attractive carbon emissions, biomass has proven to be a capable energy to meet the growing demand for clean energy. Biomass alternative fuels used to replace fossil fuels may reduce carbon emissions, and this is the main goal of climate strategy in various countries in the world. This paper presents the latest advancements in the utilization of biomass alternative fuels within the cement industry, and thoroughly examines and deliberates upon many scholarly articles pertaining to this particular research area. Studies on the impact of biomass alternative fuels on environmental emission, and challenges that may encounter when using biomass replacement fuel have also been included in this review. This paper furnishes a comprehensive understanding and elucidation of biomass alternative fuels, encompassing their implementation in the cement industry, while accentuating their salutary ramifications on the environment. Subsequently, we scrutinize the principal quandaries pertaining to the cocombustion of biomass alternative fuel in the cement industry and proffer feasible proposals for targeted solutions.

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Section: Potential Of Biomass As An Alternative Fuelmentioning

confidence: 99%

Recent Advances on the Uses of Biomass Alternative Fuels in Cement Manufacturing Process: A Review

Luo,

Song,

Huang

et al. 2024

Energy Fuels

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“…It is noteworthy that fly ash, as a kind of secondary pollutant, is small particles trapped and deposited in the flue gas purification process. Among them, the fly ash produced by the grate furnace is less than about 2–5% of the whole waste incineration volume, and the MSWI fly ash produced by the fluidized bed is more than 8–12%. ,− Since MSWI fly ash contains high levels of potentially toxic heavy metals (e.g., lead, copper, mercury, chromium, and zinc) and persistent organic pollutants (POPs, such as polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo- p -dioxins (PCDDs)), the National Hazardous Waste Inventory (NHWI) designates MSWI fly ash as a hazardous waste. − Furthermore, heavy metals are of greater concern than organic pollutants because of the significantly increased leaching and pollution potential. − Therefore, it is necessary to properly treat them to reduce heavy metal contamination in MSWI FA before disposal.…”

Section: Introductionmentioning

confidence: 99%

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Xiao,

Huang,

Cheng

et al. 2023

Energy Fuels

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With the global industrialization process and socioeconomic development, the amount of municipal solid waste (MSW) generated is growing significantly. With the growth trend of municipal solid waste, incineration is widely used for waste treatment but produces a large amount of municipal solid waste incineration fly ash, which contains heavy metals that can seriously harm human health and the ecological environment. In this Review, the current situation of MSWI fly ash disposal is reviewed, and the technologies for harmless disposal and resource utilization of heavy metals in MSWI fly ash are summarized, including solidification stabilization, leaching extraction, heat treatment, combination methods, etc. We meticulously summarized the recent progress of various incineration fly ash disposal technologies, analyzed the difficulties and solutions in formulating various feasible technical strategies, and compared their potential in the safe, environmentally friendly, and economical utilization of MSW fly ash resources. Furthermore, we also provide an outlook on the potential challenges and prospects of future progress in the harmless disposal and resource recycling of fly ash.

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Application of machine learning in prediction of Pb2+ adsorption of biochar prepared by tube furnace and fluidized bed

Huang,

Wang,

Zhu

et al. 2024

Environ Sci Pollut Res

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The migration and transformation mechanisms of heavy metals during molten salt cyclic thermal treatment of MSWI fly ash

Cited by 11 publications

References 57 publications

Recent Advances on the Uses of Biomass Alternative Fuels in Cement Manufacturing Process: A Review

Recent Advances on the Uses of Biomass Alternative Fuels in Cement Manufacturing Process: A Review

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Application of machine learning in prediction of Pb2+ adsorption of biochar prepared by tube furnace and fluidized bed

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