Waste management最新文献_第9页

Enhancing the circular economy of lithium-ion batteries: a data-driven optimisation of leaching efficiency using kernel ridge regression 加强锂离子电池的循环经济：利用核脊回归对浸出效率进行数据驱动的优化

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-11 DOI: 10.1016/j.wasman.2025.115286

Monika Wilamowska-Zawłocka , Stefan Heinen , Muhammad Sadeghzadeh , Balanand Santhosh , Gifty Sara Rolly , Justyna Łuczak , Gurdial Blugan

{"title":"Enhancing the circular economy of lithium-ion batteries: a data-driven optimisation of leaching efficiency using kernel ridge regression","authors":"Monika Wilamowska-Zawłocka , Stefan Heinen , Muhammad Sadeghzadeh , Balanand Santhosh , Gifty Sara Rolly , Justyna Łuczak , Gurdial Blugan","doi":"10.1016/j.wasman.2025.115286","DOIUrl":"10.1016/j.wasman.2025.115286","url":null,"abstract":"<div><div>The increasing demand for lithium-ion batteries (LIBs) and the consequential accumulation of waste from these batteries necessitate its appropriate disposal and recycling. This is important in order to responsibly address the environmental concerns and the shortage of critical metals such as lithium, nickel, cobalt, and manganese. The present study employs glycine, an environmentally friendly amino acid, as a leaching agent along with ascorbic acid, as a reducing agent, to recover valuable metals from spent LIB cathodes. The present study investigates the effect of time, temperature, pulp density, and reactant concentrations on the leaching process. Hydrothermal method integrated with machine learning (ML) approach reduced the number of experiments to reach the optimal leaching conditions. The study reports that at 2 mol/L glycine, 0.04 mol/L ascorbic acid, 75 °C temperature, 20 g/L pulp density, and 90 min reaction time, the leaching efficiency extends 91.0 %, 99.9 %, 92.3 % and 96.6 % of Ni, Mn, Co and Li, respectively. Additionally, glycine exhibits low leaching efficiency of Al, therefore, high purity aluminium can be recovered from the process.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115286"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental sustainability assessment processes for flat panel displays dismantling 平板显示器拆卸的环境可持续性评估程序

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-11 DOI: 10.1016/j.wasman.2025.115284

Alessandro Becci , Francesca Beolchini , Davide Labolani , Alessia Amato

{"title":"Environmental sustainability assessment processes for flat panel displays dismantling","authors":"Alessandro Becci , Francesca Beolchini , Davide Labolani , Alessia Amato","doi":"10.1016/j.wasman.2025.115284","DOIUrl":"10.1016/j.wasman.2025.115284","url":null,"abstract":"<div><div>The growing quantity of flat panel displays (FPDs) on the market, combined with rising raw material demand, makes the sustainable management of resulting waste a hot topic. Despite of research often describes innovations in recycling, it often neglects the pre-treatment step. However, it represents a key aspect for the success of the further recovery of valuable fractions, since it affects the integrity of materials, the possible presence of impurities and hazardous substances, but also the sustainability of the whole recycling chain. In this regard, the present paper assesses the sustainability of two options implemented at real scale: a more traditional crushing (followed by magnetic separation) and an innovative solution which combines manual and robotic dismantling, resulting in the separation of high-quality fractions. The analysis, carried out by a life cycle approach, proves the high potential of the innovation from an environmental point of view with emission savings reaching up to 90% in key categories (e.g. climate change). The benefit, confirmed irrespective of the supplied energy mix and the classification of waste resulting from crushing (hazardous or not hazardous), is further highlighted by the possibility to separate high-value fractions, mainly printed circuit boards of three different qualities, based on their valuable metal content. The results represent an important driver towards the implementation of sustainable choices in the field of FPD recycling.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115284"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and environmental impact of early-stage lithium recovery in lithium-ion battery recycling 锂离子电池回收中早期锂回收的实验与环境影响

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-16 DOI: 10.1016/j.wasman.2025.115283

Dominic Dittmer , Abdur-Rahman Ali , Mahya Nezhadfard , Neill Bartie , Fabian Diaz , Steffen Blömeke , Daniel Schröder , Christoph Herrmann , Bernd Friedrich

{"title":"Experimental and environmental impact of early-stage lithium recovery in lithium-ion battery recycling","authors":"Dominic Dittmer , Abdur-Rahman Ali , Mahya Nezhadfard , Neill Bartie , Fabian Diaz , Steffen Blömeke , Daniel Schröder , Christoph Herrmann , Bernd Friedrich","doi":"10.1016/j.wasman.2025.115283","DOIUrl":"10.1016/j.wasman.2025.115283","url":null,"abstract":"<div><div>In December 2019, the European Union announced the Green Deal as a growth strategy to ensure a resource-efficient and competitive economy. Based on this, in 2023 targets for battery recycling were formulated in a regulation. It is imperative to enhance both the recovery rate and the quality of the material to comply with this regulatory requirement. Two hydrometallurgical battery recycling processes for black mass from lithium-ion batteries with nickel manganese cobalt oxide 111 have been examined. The experimental investigation focuses on comparing early-stage lithium recovery (ESLR) process route, were lithium is leached in a first step with water from the black mass before acid leaching, with a reference route. Based on this analysis, an initial process simulation was developed in HSC SIM to generate data for life cycle assessment. Results show that the ESLR route increases lithium recovery to 61.9 % in experiments, with higher product quality. Simulation-based analysis showed a 5.7 % reduction in climate change impact per kg black mass treated compared to the reference route. Improved lithium recovery and quality reduced the climate impact of secondary lithium carbonate by 16 %, and by 37 % if wind power replaces grid electricity. Among sixteen impact categories evaluated, the ESLR route has lower impacts than the reference in thirteen categories.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115283"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145775908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-ionic detergent-based screening method for poly (butylene adipate-co-terephthalate) (PBAT)-degrading microorganisms 基于非离子洗涤剂的聚己二酸丁二酯（PBAT）降解微生物筛选方法。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-02 DOI: 10.1016/j.wasman.2025.115266

Yebin Han , Jinok Oh , Ayeon Kim , Jong-Min Jeon , Baeksoo Park , Jeong-Jun Yoon , Shashi Kant Bhatia , Yung-Hun Yang

{"title":"Non-ionic detergent-based screening method for poly (butylene adipate-co-terephthalate) (PBAT)-degrading microorganisms","authors":"Yebin Han , Jinok Oh , Ayeon Kim , Jong-Min Jeon , Baeksoo Park , Jeong-Jun Yoon , Shashi Kant Bhatia , Yung-Hun Yang","doi":"10.1016/j.wasman.2025.115266","DOIUrl":"10.1016/j.wasman.2025.115266","url":null,"abstract":"<div><div>With the growing use of bioplastics due to their low environmental impact, interest in bioplastic-degrading microorganisms has also increased. To screen for such microorganisms, a clear zone test using plates containing bioplastic emulsions with detergents has been widely used as a key method for rapid and accurate identification. Although emulsifying detergents affect the hydrolytic activity of microbes, their effects have not been thoroughly evaluated across different detergent candidates. In this study, eight different detergents were evaluated for their effectiveness in screening poly(butylene adipate-co-terephthalate) (PBAT)-degrading strains. The anionic detergents N-Lauroylsarcosine sodium salt (Sarkosyl NL), sodium dodecyl sulfate (SDS), and non-ionic polysorbate 20 (Tween 20) enhanced clear zone formation. Among them, the non-ionic detergent Tween 20-based clear zone test system was the most effective for screening PBAT-degrading strains, showing rapid and distinct clear zone formation. This method was also applicable to polybutylene succinate (PBS), polycaprolactone (PCL), and polylactic acid (PLA). Using the Tween 20-based method, <em>Bacillus</em> sp. Y4 was isolated and exhibited a high PBAT degradation rate of 52 % over 14 days. Overall, this study demonstrated that the Tween 20-based clear zone assay offered a reliable and biologically stable screening platform.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115266"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145670062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing upcycling of waste bioplastics for production of sustainable carbon black substitute 评估废弃生物塑料的升级回收，以生产可持续的炭黑替代品。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-24 DOI: 10.1016/j.wasman.2025.115308

Lukasz Niedzwiecki , Luca Fambri , Filippo Marchelli , Anna Pajdak , Marco Calvi , Luca Fiori

{"title":"Assessing upcycling of waste bioplastics for production of sustainable carbon black substitute","authors":"Lukasz Niedzwiecki , Luca Fambri , Filippo Marchelli , Anna Pajdak , Marco Calvi , Luca Fiori","doi":"10.1016/j.wasman.2025.115308","DOIUrl":"10.1016/j.wasman.2025.115308","url":null,"abstract":"<div><div>Carbon black is a product with multiple applications, including use as an additive for tyres or plastics, as well as ink or toner. Current methods of carbon black production are based on incomplete combustion of fossil fuels, followed by quenching, resulting in a high carbon footprint and related emissions. Even though unintended, biodegradable bioplastics at the end of life still pose problems to waste management plants. Most notably, the time required for bioplastics to biodegrade is longer than the typical residence time in state-of-the-art processes, such as anaerobic digestion and composting. This causes incomplete degradation and reduces the efficiency of waste treatment facilities. This work provides an experimental evaluation of a novel method of production of carbon black, using bioplastic waste (namely, cellulose acetate) as a feedstock. The proposed system consists of hydrothermal carbonisation (HTC) and subsequent pyrolysis of separated solid products. The novel product exhibits morphology and structure similar to commercial carbon black and high thermal stability. BET surface area as high as 175 m<sup>2</sup>/g can be achieved by combining hydrothermal carbonisation performed at 250 °C followed by pyrolysis at 600 °C. Further increase in pyrolysis temperature provided no additional benefits and resulted in collapse of the pores within the mesoporous range, with detrimental influence on BET surface and pore volume.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115308"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145834819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of the cast stone formulation for nuclear waste immobilization 核废料固定化用铸石配方研究进展

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-12 DOI: 10.1016/j.wasman.2025.115277

R. Matthew Asmussen , Gemma G. Clark , Jacob Anderson , Agathe Bourchy , Jacqueline Ferrer , Christopher Hossack , Jonathan Lapeyre , Miroslava Peterson , Suraj A. Rahmon , Joelle T. Reiser , Brian J. Riley , Sarah A. Saslow , Chinthaka Silva

{"title":"A review of the cast stone formulation for nuclear waste immobilization","authors":"R. Matthew Asmussen , Gemma G. Clark , Jacob Anderson , Agathe Bourchy , Jacqueline Ferrer , Christopher Hossack , Jonathan Lapeyre , Miroslava Peterson , Suraj A. Rahmon , Joelle T. Reiser , Brian J. Riley , Sarah A. Saslow , Chinthaka Silva","doi":"10.1016/j.wasman.2025.115277","DOIUrl":"10.1016/j.wasman.2025.115277","url":null,"abstract":"<div><div>This review aims to collate the properties of the Cast Stone cementitious waste form, a specific ternary blend of blast furnace slag (BFS, 47 wt%), fly ash (FA, 45 wt%) and ordinary Portland cement (OPC, 8 wt%). This mixture has been studied as a candidate for use in nuclear waste immobilization at the U.S. Department of Energy Hanford Site over the last 20 years. The blend has been tested for immobilizing liquid waste (including pre-treated waste, low-activity waste and mixed low-level wastes), immobilizing secondary wastes generated from vitrification, and encapsulating solid waste. As new formulations are developed at Hanford and around the world, this review provides the current state of knowledge on one of the most studied formulations for waste immobilization in the U.S. This review focuses solely on the 47/45/8 BFS/FA/OPC Cast Stone formulation and does not include the relatively close saltstone formulation nor construction “cast stone”. This report summarizes the fresh and cured properties of Cast Stone, the impact of varying water-binder ratio and waste chemistries, spectroscopic material characterizations, and field testing and modeling efforts specific to Cast Stone’s long-term performance. Relationships between the existing datasets and waste form properties are identified and discussed. From the data available, Cast Stone can provide consistent material properties that meet the disposal requirements or waste acceptance criteria of generic disposal sites, but is not yet employed for waste immobilization in practice.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115277"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lignite-enhanced aerobic composting of acidified soybean soapstock by-products: reducing carbon and nitrogen loss and accelerating composting process 褐煤强化酸化大豆皂粕副产品的好氧堆肥：减少碳氮损失，加速堆肥过程。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-09 DOI: 10.1016/j.wasman.2025.115282

Denglun Chen , Shan Li , Shugang Zhang , Mingchuan Yang , Tianlin Shen , Yanpeng Zhang , Zekun Wang , Long Zhang , Songyuan Wang , Yuanyuan Yao , Guiwei Wang , Xiaoqi Wang , Fuye Shan , Chun Wang , Yuechao Yang

{"title":"Lignite-enhanced aerobic composting of acidified soybean soapstock by-products: reducing carbon and nitrogen loss and accelerating composting process","authors":"Denglun Chen , Shan Li , Shugang Zhang , Mingchuan Yang , Tianlin Shen , Yanpeng Zhang , Zekun Wang , Long Zhang , Songyuan Wang , Yuanyuan Yao , Guiwei Wang , Xiaoqi Wang , Fuye Shan , Chun Wang , Yuechao Yang","doi":"10.1016/j.wasman.2025.115282","DOIUrl":"10.1016/j.wasman.2025.115282","url":null,"abstract":"<div><div>In sustainable waste management, producing acidified oil from soybean soapstock generates significant amounts of acidified soybean soapstock by-products (ASSBPs). Due to the high acidity and organic matter content of ASSBPs, their disposal presents challenges. In this study, a novel composting strategy was developed using lignite as an additive to enhance the aerobic composting of ASSBPs with rice bran and mushroom residues. The results showed that the addition of lignite (5–20%) advanced the thermophilic phase, reduced dry matter and carbon losses, and minimized nitrogen losses. Notably, cumulative NH<sub>3</sub> emissions were reduced by 35.65–82.26% across treatments with increasing lignite addition. Moreover, lignite enhanced compost humus stability and complexity by increasing humic acid–carbon content and improving the degree of polymerization by 31.24–86.20%. Additionally, lignite influenced bacterial community succession by increasing the abundance of bacterial species associated with humification and the germination index. Pot experiments revealed that a compost system containing 15% and 20% lignite, as commercial organic fertilizer, exhibited a similar effect on pakchoi growth. A comprehensive analysis identified 15% as the optimal lignite dosage. This study presents a sustainable approach for utilizing ASSBPs and provides new insights into the mechanism of lignite in composting complex industrial organic wastes.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115282"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145726376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-enhanced carbothermal reduction for efficient recovery of valuable metals from spent lithium-ion batteries 微波增强型碳热还原从废锂离子电池中有效回收有价金属。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-22 DOI: 10.1016/j.wasman.2025.115295

Gui-Rong Zhang , Da-Shuai Li , Xing-Yu Huang , Yuan-Long Liu , Yan-Qing Cheng , Ling Tong

{"title":"Microwave-enhanced carbothermal reduction for efficient recovery of valuable metals from spent lithium-ion batteries","authors":"Gui-Rong Zhang , Da-Shuai Li , Xing-Yu Huang , Yuan-Long Liu , Yan-Qing Cheng , Ling Tong","doi":"10.1016/j.wasman.2025.115295","DOIUrl":"10.1016/j.wasman.2025.115295","url":null,"abstract":"<div><div>In conventional recycling processes for spent lithium-ion batteries (LIBs), the black mass (BM) of spent LIBs is typically subjected to high-temperature treatment, followed by leaching of valuable metals using strong acids or alkalis. However, these processes are energy-intensive, environmentally detrimental, and costly. Herein, we proposed a microwave-enhanced carbothermal reduction (MECTR) method characterized by a rapid heating rate and high heating efficiency. Under microwave irradiation at approximately 20 W, the temperature of the BM was elevated to 545 °C, and LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> (NCM811) was completely decomposed within 10 min. Subsequently, lithium was selectively extracted via simple water leaching at room temperature, achieving a leaching efficiency of 96.07 %. Nickel, cobalt, and manganese were effectively leached using a 0.5 M sulfuric acid solution at 60 °C, with leaching efficiencies of 98.01 %, 98.53 %, and 99.50 %, respectively. In addition, the particle morphology and elemental distribution of the BM before and after microwave heating and water leaching were investigated using SEM-EDS, and the formation and leaching behavior of lithium carbonate were analyzed. This strategy, with significant advantages in terms of recovery efficiency, processing time, and energy consumption, provides a promising and sustainable alternative for the recycling of spent LIBs.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115295"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145820928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A waste-free segmented roasting strategy for sustainable recovery of critical metals from spent Indium-Gallium-Zinc oxide 从废铟镓锌氧化物中可持续回收关键金属的无废分段焙烧策略。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-22 DOI: 10.1016/j.wasman.2025.115304

Xuan He , Baozhong Ma , Yubo Liu , Xiang Li , Zhihe Cao , Hui Yang , Chengyan Wang

{"title":"A waste-free segmented roasting strategy for sustainable recovery of critical metals from spent Indium-Gallium-Zinc oxide","authors":"Xuan He , Baozhong Ma , Yubo Liu , Xiang Li , Zhihe Cao , Hui Yang , Chengyan Wang","doi":"10.1016/j.wasman.2025.115304","DOIUrl":"10.1016/j.wasman.2025.115304","url":null,"abstract":"<div><div>The growing volume of spent Indium-Gallium-Zinc Oxide (IGZO) from optoelectronic waste presents both a resource opportunity and an environmental challenge due to the acidic effluent generated by conventional recycling. This study introduces a waste-free segmented roasting strategy to sustainably recover critical metals (In, Ga, Zn) while minimizing secondary pollution. The reduction mechanism reveals that IGZO decomposes at 1000 °C into ZnGa<sub>2</sub>O<sub>4</sub>, In<sub>2</sub>O<sub>3</sub>, and volatile Zn. Subsequent acid leaching recovers In, while a second roast at 1100 °C decomposes ZnGa<sub>2</sub>O<sub>4</sub> to recover Zn and enrich Ga<sub>2</sub>O<sub>3</sub> in the residue. This approach reduces acid and water consumption by > 95 %, virtually eliminating acidic wastewater. The process achieves high recovery rates (∼97 % Zn, ∼93 % In, >98 % Ga) and enables CO off-gas capture, offering an efficient and eco-friendly alternative to hydrometallurgical routes for IGZO recycling.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115304"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145820971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct conversion of fly ash into monolithic composite aerogels with robust heat-insulating and fire-resistant properties 粉煤灰直接转化成整体复合气凝胶，具有较强的隔热耐火性能

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-01-30 Epub Date: 2025-12-26 DOI: 10.1016/j.wasman.2025.115315

Ke Zhang , Dahao Liu , Jie Wang , Huiquan Liu , Yongchen Song , Yanghui Li , Lanlan Jiang , Peng Wu , Luyuan Gong , Kun Zhang , Zheng Ling

{"title":"Direct conversion of fly ash into monolithic composite aerogels with robust heat-insulating and fire-resistant properties","authors":"Ke Zhang , Dahao Liu , Jie Wang , Huiquan Liu , Yongchen Song , Yanghui Li , Lanlan Jiang , Peng Wu , Luyuan Gong , Kun Zhang , Zheng Ling","doi":"10.1016/j.wasman.2025.115315","DOIUrl":"10.1016/j.wasman.2025.115315","url":null,"abstract":"<div><div>Fly ash poses a significant global challenge in solid waste management due to its massive production. Converting fly ash into high-performance aerogel materials provides an attractive means for its high-value utilization. However, the micron-sized fly ash particles pose significant challenges to achieving a stable aqueous dispersion and constructing a monolithic porous structure. Herein, we present a scalable, chemical-free strategy to directly convert fly ash into monolithic composite aerogels containing up to 75 wt% fly ash, exhibiting high porosity (>90 %), excellent thermal insulation, and superior fire resistance. Stable aqueous dispersions of fly ash were achieved through steric hindrance imparted by low-dimensional nanoclay. Only minimal polymer addition (∼8 wt%) was required to form a robust clay network, effectively preventing pore collapse with increased fly ash content. The resulting fly ash aerogels balance thermal insulation and thermal stability, exhibiting thermal conductivities ranging from 0.0334 to 0.0385 W/(m·K) and a compressive strength of up to 2.7 MPa at 80 % strain, while maintaining structural integrity under extreme temperatures of up to ∼1300 °C. This research significantly broadens the potential applications of fly ash and presents an optimal strategy for its high-value utilization.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115315"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0