Waste management最新文献_第6页

Closed-loop recycling of waste ultra-high molecular weight polyethylene via inducing melt fracture coupled with solid-state shear milling 诱导熔体断裂耦合固态剪切铣削的超高分子量聚乙烯废塑料闭环回收研究

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.wasman.2026.115341

Kun Wang , Changlin Cao , Xiaochuan Chen , Qingrong Qian , Weiming Zhou , Songwei Yang , Qinghua Chen

{"title":"Closed-loop recycling of waste ultra-high molecular weight polyethylene via inducing melt fracture coupled with solid-state shear milling","authors":"Kun Wang , Changlin Cao , Xiaochuan Chen , Qingrong Qian , Weiming Zhou , Songwei Yang , Qinghua Chen","doi":"10.1016/j.wasman.2026.115341","DOIUrl":"10.1016/j.wasman.2026.115341","url":null,"abstract":"<div><div>Ultra-high molecular weight polyethylene (UHMWPE) is a high-performance engineering thermoplastic characterized by outstanding mechanical strength, chemical stability, resistance to crack propagation, exceptional wear resistance, and extremely high melt viscosity. These attributes, while advantageous for performance, render UHMWPE highly challenging to recycle using conventional approaches. Consequently, there is an urgent demand for innovative recycling strategies that preserve, or potentially enhance, its intrinsic properties. This study introduces a mechanical recycling approach that integrates high- and low-temperature shear fields through the use of double-roll open mills and solid-state shear milling equipment. High-temperature shear stresses induce melt fracture in UHMWPE, generating structural defects, while the three-dimensional shear forces in solid-state shear milling accelerate defect initiation and propagation. This coupled shear-field process mitigates the limitations imposed by UHMWPE’s high melt viscosity and highly entangled chain architecture, thus overcoming conventional recycling barriers. Application of this method to waste UHMWPE sheets enabled effective closed-loop recycling. The recycled samples retained up to 93% of the tensile strength of the original sheets. Furthermore, the processed material exhibited irregular morphologies with micrometer-scale particle sizes and reduced thickness. Notably, molded samples derived from this process demonstrated enhanced tensile fracture strain compared with the original sheet waste. Overall, the coupled high–low temperature shear-field strategy presents a facile and promising pathway for the closed-loop recycling of UHMWPE and potentially other difficult-to-process engineering thermoplastics.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115341"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145918537","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

Monitoring litter typology and loading in stormwater: Implications for waste management and mitigation policies 监测雨水中的垃圾类型和装载：对废物管理和缓解政策的影响

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-16 DOI: 10.1016/j.wasman.2026.115350

Romain TRAMOY , Lauriane LEDIEU , Ibrahima MBALLO BIAYE , Johnny GASPERI , Bruno TASSIN

{"title":"Monitoring litter typology and loading in stormwater: Implications for waste management and mitigation policies","authors":"Romain TRAMOY , Lauriane LEDIEU , Ibrahima MBALLO BIAYE , Johnny GASPERI , Bruno TASSIN","doi":"10.1016/j.wasman.2026.115350","DOIUrl":"10.1016/j.wasman.2026.115350","url":null,"abstract":"<div><div>Sewer systems are an overlooked pathway of litter to rivers. We monitored six combined and four separate sewer outlets in France using retention nets over several years to quantify and characterize over 30,000 items > 5 mm, including 91% plastic debris. Total median loading rates were 155 g ha<sup>−1</sup> yr<sup>−1</sup> (120 g.ha<sup>−1</sup>.yr<sup>−1</sup> for plastics) and 8 g cap<sup>−1</sup> yr<sup>−1</sup> (6 g cap<sup>−1</sup>.yr<sup>−1</sup> for plastics), consistent with the few previous studies available in stormwater and rivers, although litter typology is different. Combined sewers were dominated by sanitary products like wet wipes and towels (46% of plastic mass), while separate systems were dominated by cigarette butts and food packaging related to on-the-go consumption. Sewer monitoring proved complementary to river monitoring, with fewer unidentified items (∼15%) and clearer source attribution. Management strongly influenced maintenance costs: internal management and incineration by public authorities was far cheaper (800 € per net and per year) than outsourced landfill disposal (16,000 € per net and per year). Despite operational limits of nets, sewer monitoring provides robust data for litter flux models and for evaluating upstream mitigation policies. Expanding such monitoring, supported by sustained funding and international coordination, will afford reliable and homogeneous method for litter loading estimates into rivers and their source identification:an essential step toward an effective plastics treaty.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115350"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979117","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

Recovery of diverse solid wastes into porous materials via thermal processing: Review of melt structure, processing parameter, and application 各种固体废物通过热加工回收成多孔材料：熔体结构、加工参数和应用综述

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-08 DOI: 10.1016/j.wasman.2026.115343

Weiyi Ji , Yifan Zhou , Jian-Xin Lu , Christopher Cheeseman , Chi-Sun Poon

{"title":"Recovery of diverse solid wastes into porous materials via thermal processing: Review of melt structure, processing parameter, and application","authors":"Weiyi Ji , Yifan Zhou , Jian-Xin Lu , Christopher Cheeseman , Chi-Sun Poon","doi":"10.1016/j.wasman.2026.115343","DOIUrl":"10.1016/j.wasman.2026.115343","url":null,"abstract":"<div><div>Converting multiple solid wastes into sustainable porous materials via thermal processing is a practical approach to beneficially recycling waste and reducing landfill burden. The resulting value-added products have great potential as insulation and lightweight materials for construction purposes. The properties of these waste-based porous materials (WBPM) are mainly determined by the thermal process, specifically the high-temperature matrix properties and the gas evolution process. This review provides insights into the key factors affecting the melt structure of the matrix and the gas, from the perspective of the composition of starting materials, thermal treatment conditions, and additives. In particular, the effects of the main oxide components constituting solid waste on the melt structure and crystallisation are analysed. The conventional and novel applications of WBPM are summarised and discussed. These insights provide significant information for facilitating the highly efficient utilisation of solid wastes into value-added porous materials on a large scale.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115343"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928082","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

Synergistic electrochemical multi-resources recovery from spent LiFePO4 and etching solvents 废LiFePO4和蚀刻溶剂的协同电化学多资源回收

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-08 DOI: 10.1016/j.wasman.2026.115338

Wei Jin , Chaoqi Wang , Feilong Zhang

{"title":"Synergistic electrochemical multi-resources recovery from spent LiFePO4 and etching solvents","authors":"Wei Jin , Chaoqi Wang , Feilong Zhang","doi":"10.1016/j.wasman.2026.115338","DOIUrl":"10.1016/j.wasman.2026.115338","url":null,"abstract":"<div><div>The recycling of spent lithium (Li)-ion batteries (LFP) is crucial for resource sustainability and environmental protection. Conventional hydrometallurgical processes often require the addition of external strong oxidizing agents and elevated temperatures to achieve satisfactory metal leaching, presenting both economic and environmental challenges. This study proposes an innovative and sustainable “waste-to-wealth” strategy for the simultaneous recovery of valuable metals from spent LFP cathodes and copper (Cu) from etching waste liquid. The core of this strategy is an integrated “three-birds-with-one-stone” separation technology combining electrochemical oxidation and deposition. Without requiring external oxidants, chloride ions naturally present in the etching wastewater are electrochemically oxidized in situ at a Ru-Ir-Ti anode to generate active chlorine species, which effectively destroy the LFP crystal structure for Li extraction. Simultaneously, Cu ions are directly electrodeposited onto the cathode as metallic Cu powder. Under optimal conditions (0.2 M HCl, 120 min), leaching efficiencies of 100 % for Li and 73.3 % for Fe were achieved, along with a Cu deposition efficiency of 99.6 %. Subsequent selective precipitation yielded high-purity, battery-grade Li<sub>3</sub>PO<sub>4</sub> (99.5 % purity). Mechanistic studies confirmed that active chlorine species are the primary contributors to the highly efficient Li leaching. This novel process eliminates the need for external oxidants and heating, offering a greener, more cost-effective, and streamlined alternative for the coordinated recovery of spent batteries and heavy-metal-containing wastewater, demonstrating significant potential for practical application within a circular economy framework.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115338"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928087","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

Waste–to–waste valorization: Sustainable palladium recovery from real spent catalytic converter leachates using chicken feathers 废物对废物增值：利用鸡毛从真正的催化转化器废渗滤液中可持续回收钯

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.wasman.2026.115349

Amir Nobahar , Flavia N. Braga , Filipe H.B. Sosa , Nicolas Schaeffer , João A.P. Coutinho , Helena Passos

{"title":"Waste–to–waste valorization: Sustainable palladium recovery from real spent catalytic converter leachates using chicken feathers","authors":"Amir Nobahar , Flavia N. Braga , Filipe H.B. Sosa , Nicolas Schaeffer , João A.P. Coutinho , Helena Passos","doi":"10.1016/j.wasman.2026.115349","DOIUrl":"10.1016/j.wasman.2026.115349","url":null,"abstract":"<div><div>The increasing demand for platinum group metals (PGM), mainly driven by their extensive use in automotive catalytic converters, has heightened the need for efficient and green recovery methods. Simultaneously, the poultry industry generates significant amounts of keratin–rich chicken feathers (CF), which are commonly disposed of by incineration or landfilling, raising environmental concerns. This study explores the use of CF as a sustainable and cost–effective biosorbent for the selective recovery of Pd from synthetic multimetallic solutions and HCl–based spent autocatalytic converters leachates. Adsorption experiments revealed that the optimal Pd uptake (14.10 ± 0.31) mg.g<sup>−1</sup> was achieved at 0.2 M HCl (pH ∼ 0.79), while 2 M HCl provided the highest selectivity towards Pd over other metals. Adsorption kinetics followed a pseudo–second–order model, indicating chemisorption as the dominant mechanism, and Langmuir isotherm analysis yielded a Pd adsorption capacity of (19.61 ± 1.31) mg.g<sup>−1</sup>. Desorption tests demonstrated ∼100% Pd recovery using 0.2 M thiourea + 0.5 M HCl solution. Characterization of the CF by Raman and solid–state UV–Vis spectroscopy, FTIR, SEM−EDX, and XPS confirmed the interaction of Pd with disulfide bonds and protonated amino groups as Pd–chloride complexes. Bench–scale trials on HCl–based leachates with an optimized CF to leachate ratio achieved near–complete Pd separation in a single adsorption step with high purity, highlighting the robustness and selectivity of this method under realistic conditions. Pd was successfully desorbed from CF by acidified thiourea solution, offering added value for catalytic applications.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115349"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979026","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

Unraveling synergistic control in green Leaching: A double exponential kinetic model for efficient and sustainable indium recovery from E-waste using deep eutectic solvents 揭示绿色浸出中的协同控制：利用深度共晶溶剂从电子废物中高效和可持续地回收铟的双指数动力学模型。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.wasman.2026.115334

Runchang Su , Yadi Wang , Shujie Tang , Zhipeng Wang , Mei Zhang , Min Guo

{"title":"Unraveling synergistic control in green Leaching: A double exponential kinetic model for efficient and sustainable indium recovery from E-waste using deep eutectic solvents","authors":"Runchang Su , Yadi Wang , Shujie Tang , Zhipeng Wang , Mei Zhang , Min Guo","doi":"10.1016/j.wasman.2026.115334","DOIUrl":"10.1016/j.wasman.2026.115334","url":null,"abstract":"<div><div>The rapid development of the electronics industry caused an exponential increase in waste liquid crystal displays (LCDs). Waste LCDs release indium tin oxide (ITO, In<sub>2</sub>O<sub>3</sub>·SnO<sub>2</sub>), which is cytotoxic and poses a significant burden on the environment. Deep eutectic solvents, characterized by their high saturated vapor pressure and tunable composition, were regarded as sustainable green solvents and could serve as efficient and environmentally friendly leaching agents for ITO. This study systematically investigated the leaching mechanism of indium tin oxide in a specific DES (oxalic acid dihydrate: choline chloride = 1:2.6). Characterization results revealed a multi-step pathway with multiple rate-controlling stages. The proposed double exponential model demonstrated exceptional performance (<em>R</em><sup>2</sup> > 0.995) and stability across all conditions, effectively describing this multi-controlled process. Using this model, the effects of temperature, stirring rate, and indium tin oxide particle size were quantified. Dynamic analysis confirmed the dual control mechanism. Significantly, reducing particle size drastically lowered apparent activation energy (265 μm: 53.24 kJ·mol<sup>−1</sup> → 45 μm: 18.02 kJ·mol<sup>−1</sup>), highlighting its key role in efficiency, while stirring rate had minimal impact. The model’s broad applicability was validated across diverse deep eutectic solvent leaching systems (<em>R</em><sup>2</sup> > 0.98). This work pioneers the application of the double exponential kinetic model to deep eutectic solvent leaching, establishing it as a powerful tool for understanding mechanisms and optimizing processes.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115334"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145918621","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

Air-sea exchange and coastal transport dynamics of microplastics around a Caribbean Island 加勒比海岛屿周围微塑料的海气交换和沿海运输动力学

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.wasman.2026.115345

Salvador Reynoso-Cruces , Carlos Edo , Roberto Rosal , Luis Ladino , Harry Alvarez-Ospina

{"title":"Air-sea exchange and coastal transport dynamics of microplastics around a Caribbean Island","authors":"Salvador Reynoso-Cruces , Carlos Edo , Roberto Rosal , Luis Ladino , Harry Alvarez-Ospina","doi":"10.1016/j.wasman.2026.115345","DOIUrl":"10.1016/j.wasman.2026.115345","url":null,"abstract":"<div><div>Air-sea exchange represents a key yet insufficiently quantified pathway for microplastic (MP) transport, particularly in island environments where oceanic exposure and atmospheric forcing interact. In this work, we aimed to quantify the distribution and polymer composition of MP in both the atmosphere and seawater around a Caribbean island while simultaneously evaluating their transport pathways through Lagrangian drift modeling. MP distribution, polymer composition, and transport dynamics were examined through coordinated atmospheric and surface-water sampling, micro-FTIR analysis, chemometric discrimination, and Lagrangian drift modeling (OpenDrift). Polyethylene (PE) dominated airborne MP (34 %), while polyester (PES) prevailed in seawater (54 %), indicating selective partitioning driven by density, morphology, and surface chemistry. Morning airborne concentrations were 37 % higher than afternoon values, consistent with sea-breeze circulation patterns. Seawater MP concentrations increased from 5 MP L<sup>−1</sup> to 35 MP L<sup>−1</sup> toward the continental shelf, a spatial gradient reproduced by drift simulations showing > 40 % nearshore retention within 24 h and rapid northward export via the Yucatán Current. By integrating polymer-specific characterization with physical transport modeling, the present study provides mechanistic insight into how intrinsic material properties and local hydrodynamics jointly determine MP fate in tropical island systems, offering a framework for targeted monitoring and mitigation in coastal environments.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115345"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928083","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

New model of municipal solid waste incineration fly ash treatment and its comprehensive benefits 城市生活垃圾焚烧飞灰处理新模式及其综合效益

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2025-12-30 DOI: 10.1016/j.wasman.2025.115318

Chujie Qi , Runhao Zhang , Wenxiang Zhou , Tong Zhang , Xueqi Zhang , Jiaxin Bai , Yuqi Zhao , Bo Bian

{"title":"New model of municipal solid waste incineration fly ash treatment and its comprehensive benefits","authors":"Chujie Qi , Runhao Zhang , Wenxiang Zhou , Tong Zhang , Xueqi Zhang , Jiaxin Bai , Yuqi Zhao , Bo Bian","doi":"10.1016/j.wasman.2025.115318","DOIUrl":"10.1016/j.wasman.2025.115318","url":null,"abstract":"<div><div>Municipal solid waste incineration fly ash (MSWI FA), characterized by high concentrations of chlorides, heavy metals, and dioxins, presents significant environmental challenges. This study developed a synergistic washing-hydrothermal oxidation process for safe resource recovery. Optimized three-stage countercurrent washing (L/S ratio of 4 mL/g, 750 rpm, 25 °C, 20 min) yielded 79.86% chloride removal efficiency, meeting the 2% residual chloride threshold. Subsequent hydrothermal treatment (300 °C, 90 min, pH 7.0, L/S ratio of 4 mL/g) enhanced residual metal fractions (Cu: +36.32%, Zn: +40.61%, Cd: +38.81%) versus washed ash, with leached concentrations complying with GB 8978–1996. Dioxin toxicity equivalence was reduced by 99.7% (1.87 μg-TEQ/kg to 5.4 ng-TEQ/kg), far below the 50 ng-TEQ/kg regulatory limit. Life cycle assessment confirmed superior environmental performance over landfilling, particularly in heavy metal emissions and human toxicity mitigation. Risk analysis validated effective leached metal toxicity reduction. Carbon accounting bounded by the resource-based production of ceramic pellets from treated fly ash demonstrates a double offset: substitution of carbon-intensive building materials with enhanced carbon sequestration for net life-cycle carbon reductions. Economic projections indicate USD 363 million revenue potential by 2030. Thus, the synergistic washing-hydrothermal oxidation process developed herein enables efficient dechlorination, heavy metal stabilization, and deep dioxin degradation in MSWI FA. This integrated approach delivers significant environmental, carbon-reduction, and economic benefits, enabling viable fly ash resource utilization.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115318"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145852455","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

Valorization of recycled paper mill sludge via mass–energy integration for sustainable onsite power generation: A case study 通过质能集成实现可持续现场发电的再生造纸厂污泥的增值：一个案例研究。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-19 DOI: 10.1016/j.wasman.2026.115354

Patcharin Racho , Boonsita Nammana , Netnapid Tantemsapya , Boonchai Wichitsathian , Kriangsak Riewklang , Kraichat Tantrakarnapa

{"title":"Valorization of recycled paper mill sludge via mass–energy integration for sustainable onsite power generation: A case study","authors":"Patcharin Racho , Boonsita Nammana , Netnapid Tantemsapya , Boonchai Wichitsathian , Kriangsak Riewklang , Kraichat Tantrakarnapa","doi":"10.1016/j.wasman.2026.115354","DOIUrl":"10.1016/j.wasman.2026.115354","url":null,"abstract":"<div><div>This study presents a site-specific, year-long integrated mass–energy assessment of sludge valorisation at a Thai recycled paper mill, evaluating three sludge-to-energy pathways: (1) refuse-derived fuel (RDF) production from dewatered sludge, (2) anaerobic digestion (AD) of primary and secondary sludge, and (3) a hybrid cascade combining AD with digestate-to-RDF conversion. An auditable organic-carbon balance with a very small deviation (ΔMB ≈ +0.0068%) demonstrates high data quality and traceability. A product-substitution framework was applied using functional units of 1 kWh of on-site electricity and 1 t of on-site steam delivered, with system boundaries explicitly incorporating air-pollution control systems (APCS) for RDF and essential gas-cleaning for AD. The analysis indicates substantial potential for fossil-energy displacement, with differences observed among the three pathways once APCS-related parasitic loads and compliance costs are considered. Over a 20-year project horizon, techno-economic analysis shows that the relative economic performance of the pathways is strongly influenced by the treatment of APCS capital and operating expenditures under on-site utilisation conditions. One-way sensitivity analysis identifies electricity tariff and grid emission factor, sludge and digestate dryness and higher heating value, and APCS costs as the dominant parameters affecting economic outcomes. By integrating experimental data with mass–energy balancing and substitution-based assessment, this study provides a transparent analytical basis for comparing sludge-to-energy options in recycled paper mills under realistic operational and compliance constraints.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115354"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146012542","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

Comprehensive and sludge-free treatment of raw landfill leachate wastewaters using electro-peroxone 电-过氧酮综合无污泥处理垃圾渗滤液

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2026-02-01 Epub Date: 2026-01-03 DOI: 10.1016/j.wasman.2025.115313

Ramya Srinivasan , Anjali Dubey , Indumathi M Nambi

{"title":"Comprehensive and sludge-free treatment of raw landfill leachate wastewaters using electro-peroxone","authors":"Ramya Srinivasan , Anjali Dubey , Indumathi M Nambi","doi":"10.1016/j.wasman.2025.115313","DOIUrl":"10.1016/j.wasman.2025.115313","url":null,"abstract":"<div><div>Advanced oxidation processes (AOPs) offer a promising strategy for leachate contaminant removal. In this work, electro-peroxone is evaluated first using humic acid and then applied to raw leachates from American and Indian landfills. Its performance is compared with electrolysis and ozonation using a reticulated vitreous carbon (RVC) cathode, while assessing the effects of current, electrode area, aeration rate, and pH on H<sub>2</sub>O<sub>2</sub> generation. Quantification of H<sub>2</sub>O<sub>2</sub> and •OH shows that electro-peroxone produces the highest •OH levels, identifying it as the most effective pollution-abatement pathway among the tested processes. It is demonstrated for the first time that the RVC electrode electrochemically generates hydroxyl radicals during electrolysis in an ozone- and catalyst-independent manner, while also producing hydroxyl radicals during electro-peroxone, as confirmed by EPR analysis.</div><div>Additionally, electro-peroxone provides a unified treatment approach that simultaneously removes organics, color, microorganisms, TSS, and turbidity. In the case of both the leachates, a total organic carbon (TOC) degradation of about 70–93 %, a turbidity removal of around 80–97 %, and about 85–99.5 % TSS removal in 480 min, 99.4–99.7 % color removal in 240 min, and around 96–99.93 % disinfection in 180 min was attained. The electro-peroxone system also demonstrated a significant reduction in toxicity after treatment. The particle distribution analysis before and after treatment clearly indicated the reduction in particle size and substantiated the reduction in TSS and turbidity, and increase in soluble TOC. Finally, mechanisms for contaminant abatement and the novel phenomenon of particulate organic matter mineralization are proposed, demonstrating electro-peroxone as a sustainable, chemical-free, zero-sludge treatment option for complex landfill leachates.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"212 ","pages":"Article 115313"},"PeriodicalIF":7.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886189","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