Waste management最新文献

{"title":"Non-ionic detergent-based screening method for poly (butylene adipate-co-terephthalate) (PBAT)-degrading microorganisms","authors":"Yebin Han ,&nbsp;Jinok Oh ,&nbsp;Ayeon Kim ,&nbsp;Jong-Min Jeon ,&nbsp;Baeksoo Park ,&nbsp;Jeong-Jun Yoon ,&nbsp;Shashi Kant Bhatia ,&nbsp;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}

{"title":"Assessing upcycling of waste bioplastics for production of sustainable carbon black substitute","authors":"Lukasz Niedzwiecki ,&nbsp;Luca Fambri ,&nbsp;Filippo Marchelli ,&nbsp;Anna Pajdak ,&nbsp;Marco Calvi ,&nbsp;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 m²/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}

{"title":"A review of the cast stone formulation for nuclear waste immobilization","authors":"R. Matthew Asmussen ,&nbsp;Gemma G. Clark ,&nbsp;Jacob Anderson ,&nbsp;Agathe Bourchy ,&nbsp;Jacqueline Ferrer ,&nbsp;Christopher Hossack ,&nbsp;Jonathan Lapeyre ,&nbsp;Miroslava Peterson ,&nbsp;Suraj A. Rahmon ,&nbsp;Joelle T. Reiser ,&nbsp;Brian J. Riley ,&nbsp;Sarah A. Saslow ,&nbsp;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}

{"title":"Lignite-enhanced aerobic composting of acidified soybean soapstock by-products: reducing carbon and nitrogen loss and accelerating composting process","authors":"Denglun Chen ,&nbsp;Shan Li ,&nbsp;Shugang Zhang ,&nbsp;Mingchuan Yang ,&nbsp;Tianlin Shen ,&nbsp;Yanpeng Zhang ,&nbsp;Zekun Wang ,&nbsp;Long Zhang ,&nbsp;Songyuan Wang ,&nbsp;Yuanyuan Yao ,&nbsp;Guiwei Wang ,&nbsp;Xiaoqi Wang ,&nbsp;Fuye Shan ,&nbsp;Chun Wang ,&nbsp;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 NH₃ 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}

{"title":"Microwave-enhanced carbothermal reduction for efficient recovery of valuable metals from spent lithium-ion batteries","authors":"Gui-Rong Zhang ,&nbsp;Da-Shuai Li ,&nbsp;Xing-Yu Huang ,&nbsp;Yuan-Long Liu ,&nbsp;Yan-Qing Cheng ,&nbsp;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_0.8Co_0.1Mn_0.1O₂ (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}

{"title":"A waste-free segmented roasting strategy for sustainable recovery of critical metals from spent Indium-Gallium-Zinc oxide","authors":"Xuan He ,&nbsp;Baozhong Ma ,&nbsp;Yubo Liu ,&nbsp;Xiang Li ,&nbsp;Zhihe Cao ,&nbsp;Hui Yang ,&nbsp;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 ZnGa₂O₄, In₂O₃, and volatile Zn. Subsequent acid leaching recovers In, while a second roast at 1100 °C decomposes ZnGa₂O₄ to recover Zn and enrich Ga₂O₃ in the residue. This approach reduces acid and water consumption by &gt; 95 %, virtually eliminating acidic wastewater. The process achieves high recovery rates (∼97 % Zn, ∼93 % In, &gt;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}

{"title":"Direct conversion of fly ash into monolithic composite aerogels with robust heat-insulating and fire-resistant properties","authors":"Ke Zhang ,&nbsp;Dahao Liu ,&nbsp;Jie Wang ,&nbsp;Huiquan Liu ,&nbsp;Yongchen Song ,&nbsp;Yanghui Li ,&nbsp;Lanlan Jiang ,&nbsp;Peng Wu ,&nbsp;Luyuan Gong ,&nbsp;Kun Zhang ,&nbsp;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 (&gt;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}

{"title":"Generation, transformation and inhibition mechanism of hazardous waste flue coated materials during copper smelting process","authors":"Kai Fan ,&nbsp;Haipei Zhang ,&nbsp;Zhongming Jiang ,&nbsp;Songhe Ye ,&nbsp;Zhenqin Ge ,&nbsp;Bo Li ,&nbsp;Yonggang Wei ,&nbsp;Shiwei Zhou ,&nbsp;Hua Wang","doi":"10.1016/j.wasman.2025.115317","DOIUrl":"10.1016/j.wasman.2025.115317","url":null,"abstract":"<div><div>During the pyrometallurgical process of copper, the hard nodular substances formed in the flue system can easily disrupt the smelting operation and cause various types of environmental pollution. This study investigated the formation mechanism, and phase transformation of flue coating materials (FCMs) during copper smelting through multi-scale characterization and thermodynamic simulation, and proposed corresponding suppression measures. The results show that, driven by the oxygen potential gradient and sulfur condensation, the FCMs follow the pathway of “volatilization migration − encapsulation − sulfation”, leading to the accumulation of toxic metal compounds. The spatial evolution of phases from metallic Cu/CuFe₂O₄ in the vertical flue to sulfates/sulfides in the horizontal flue was quantitatively elucidated. The application results of the new suppression strategy show that raising the bottom temperature of the vertical flue from the original 1220–––1320 ℃ can reduce the total mass of the dangerous range hood by 35% − 45%. Adding 1–––5% CaO can reduce the accumulation of FCMs by 30–––40% by forming a porous structure that is easy to move, while adding 1–––5% MgO can lower the formation rate of new FCMs by 25–––35% by promoting a stable spinel framework. The proposal of the new suppression measures can reduce the additional energy consumption caused by furnace shutdown, cooling, manual slag removal and reheating start-up for an annual 300,000-ton oxygen-enriched top-blown copper smelting enterprise by approximately 400 tons of standard coal each year.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115317"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840821","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}

{"title":"Evaluating hydrogen sulfide removal from municipal landfill leachate using a venturi stripping system","authors":"Patrick M. D’Aoust ,&nbsp;Pawel J. Szulc ,&nbsp;Dwight Houweling","doi":"10.1016/j.wasman.2025.115288","DOIUrl":"10.1016/j.wasman.2025.115288","url":null,"abstract":"<div><div>This study evaluates a venturi-based hydrogen sulfide stripping system (HSSS) for landfill leachate pretreatment through field testing, SUMO modeling, and cost analysis. Over 18 months of operation, the system achieved an average sulfide removal of ∼ 60.1 %, reaching up to 79 % under favorable conditions. Operation also raised leachate pH due to CO₂ stripping, altering sulfide speciation and underscoring the importance of efficient single-stage treatment. Statistical analysis identified strong positive correlation between influent sulfide and removal efficiency, negative correlations with sulfate and temperature, and rainfall-driven increases in BOD. The SUMO model significantly underestimated sulfide removal, while capturing the pH and alkalinity trends reasonably well, reflecting the complexity of leachate chemistry. Economically, the HSSS required only ∼$10,000 CAD in capital costs and minimal operational costs (&lt;$200 CAD) annually to operate (∼$1.31 CAD / 1,000 m³), making it a highly cost-effective alternative to conventional abatement methods.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115288"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737734","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}

{"title":"Numerical modeling of settlement and gas generation in biodegrading municipal solid waste: a systematic review for sanitary landfill applications","authors":"Caio Henrique Buranello dos Santos ,&nbsp;Sandro Lemos Machado ,&nbsp;Michael Andrade Maedo ,&nbsp;Roger Augusto Rodrigues","doi":"10.1016/j.wasman.2025.115285","DOIUrl":"10.1016/j.wasman.2025.115285","url":null,"abstract":"<div><div>The short- and long-term behavior of municipal solid waste (MSW) in sanitary landfills is governed by coupled hydraulic, mechanical, thermal, and biochemical processes. Among these, settlement due to biodegradation and landfill gas (LFG) generation are critical for assessing structural stability, environmental safety, and energy recovery during both operation and post-closure. Following the guidelines established by the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) in 2020, this study systematically reviews numerical models implemented in computational frameworks to simulate settlement and/or gas generation in biodegrading MSW. A structured search in the Scopus database covered peer-reviewed journal articles and conference papers published between 2000 and May 2025. The reviewed works address different combinations of coupled processes, mainly implemented using finite element or finite difference formulations. While one-dimensional domains remain common, nearly half of the studies employed two-dimensional models. First-order kinetics is the predominant approach for representing biodegradation and its coupling to volumetric strain and gas generation, although some models incorporate more detailed biochemical processes. Earlier approaches used the secondary compression index to capture long-term MSW settlement, whereas a few recent studies implemented physically based creep models. Waste heterogeneity and its time-dependent mechanical response have been considered in some studies, although temperature effects on waste properties remain rarely implemented in computational frameworks. This review highlights critical research gaps and emphasizes the need for unified numerical frameworks capable of integrating biodegradation, multiphysical coupling, temperature effects on MSW properties, large-strain kinematics, and parameter variability to realistically simulate the evolving behavior of MSW in landfills.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"211 ","pages":"Article 115285"},"PeriodicalIF":7.1,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145744881","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}