Waste management最新文献

{"title":"Direct hydrothermal regeneration and high value-added utilization of spent lithium iron phosphate for priority lithium extraction from acidic leachate","authors":"Shiyu Zhou ,&nbsp;Qiang Li ,&nbsp;Penglin Wang ,&nbsp;Dongxian Chen ,&nbsp;Shuai Gu ,&nbsp;Jianguo Yu","doi":"10.1016/j.wasman.2025.115134","DOIUrl":"10.1016/j.wasman.2025.115134","url":null,"abstract":"<div><div>To address the global lithium shortage, direct regeneration of degraded cathodes via lattice reconstruction offers an eco-efficient strategy for recycling spent lithium-ion batteries (LIBs). However, industrial adoption is hindered by residual defects and insufficient lithium replenishment. Here, we propose a groundbreaking high-value reuse pathway, repurposing regenerated lithium iron phosphate (LFP) as an acid-stable adsorbent for priority lithium extraction from acidic leachate. Thermodynamic and electrochemical analyses suggested the stronger reductant facilitate the lattice reconstruction. The regenerated LFP, processed via a 2-hour hydrothermal repair at 220 °C using ascorbic acid, exhibited an exceptional lithium extraction capacity of 38.5 mg/g without electrode dissolution, selectively reducing residual lithium to &lt; 20 ppm. By simultaneously enabling high-value utilization of spent LFP and priority lithium extraction, this paradigm bridges economic viability with circular economy principles, offering a blueprint for upcycling spent LIB materials.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115134"},"PeriodicalIF":7.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145092445","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":"Hydrothermal degradation of biomass with Zn electroplating metal effluent for H2 production","authors":"Vikas Patel,&nbsp;Sivamohan N. Reddy","doi":"10.1016/j.wasman.2025.115129","DOIUrl":"10.1016/j.wasman.2025.115129","url":null,"abstract":"<div><div>Supercritical water gasification (SCWG) is an evolving technology that directly converts complex wet organic waste into hydrogen-rich fuel gases while simultaneously recovering heavy metals from the wastewater. In this study, lignocellulosic feedstock like cauliflower stalk, which is widely available in India, was used along with the heavy metal-contaminated wastewater from electroplating industries for hydrogen production. The research highlights the impact of residence time on the product distribution of gas, liquid, and solid phases. At 600 °C temperature and a 50 min residence time, the highest total gas yield (TGY) (31.7 mol/kg) and the maximum H₂ yield (26.2 mol/kg) were obtained. The treated liquid was analyzed using total organic carbon (TOC) and Microwave Plasma Atomic Electron Spectroscopy (MP-AES) analysis to measure organic carbon and metal concentration. FE-SEM, XRD, and XPS analysis confirm the immobilization of the heavy metals from wastewater to produce nanometal carbon composite during the supercritical water gasification process. The maximum specific surface area (73.43 m²/g) and the pore volume (0.12 cc/g) was obtained at 600 ℃, and the residence time was 60 min.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115129"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076272","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":"Fluoride removal from NMC black mass leachates during Lithium-Ion battery recycling via aluminum sulfate precipitation","authors":"Ali Aliyev ,&nbsp;Devon Gray ,&nbsp;Sevan Bedrossian ,&nbsp;Gisele Azimi","doi":"10.1016/j.wasman.2025.115136","DOIUrl":"10.1016/j.wasman.2025.115136","url":null,"abstract":"<div><div>This study presents a systematic approach for fluoride removal from pregnant leach solutions derived from NMC-type lithium-ion battery black mass using aluminum sulfate precipitation. The effects of pH, Al₂ (SO₄) ₃:F molar ratio, temperature, and reaction time are investigated to optimize fluoride removal while minimizing co-precipitation of valuable metals including lithium, nickel, cobalt, and manganese. At pH 5 and an Al₂ (SO₄) ₃:F ratio of 1.75, over 97% of fluoride was removed with less than 10% co-precipitation of valuable metals. An empirical model was developed to predict precipitation behavior, and model predictions showed good agreement with experimental results. Comparisons with OLI thermodynamic modeling revealed discrepancies in transition metal behavior, highlighting the value of the novel experimental data provided. These findings not only advance the development of efficient fluoride removal strategies but also offer a critical dataset that could support future refinement of thermodynamic databases used in hydrometallurgical modeling of lithium-ion battery recycling systems.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115136"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081853","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":"Green collaborative recycling of spent NCM cathode and waste sodium sulfate via an unconventional process","authors":"Xuesong Gao ,&nbsp;Kunhong Gu ,&nbsp;Xinglan Cui ,&nbsp;Junwei Han","doi":"10.1016/j.wasman.2025.115133","DOIUrl":"10.1016/j.wasman.2025.115133","url":null,"abstract":"<div><div>Spent lithium-ion battery and waste sodium sulfate are hazardous solid wastes containing heavy metals and organic pollutants, both of which are difficult to dispose of safely. Here, we propose a collaborative disposal process to selective sulfidize spent lithium battery ternary material (NCM) with waste sodium sulfate by roasting, in which the Li in NCM is converted to water-soluble carbonate, manganese to acid-soluble oxides, and nickel and cobalt to insoluble sulfides. This favors the selective separation of valuable metals by stepwise leaching. Meanwhile, waste sodium sulfate provides essential sulfur and sodium sources, promoting selective sulfidation and grain growth to facilitate subsequent stepwise leaching. About 92.10 % of Li is extracted from the roasted sample after water leaching and 97.67 % of Mn is selectively extracted from the water leaching residue after the acid leaching. The nickel and cobalt are concentrated into the acid leaching residue, which can be used to directly produce commercial NCM materials. This study provides technical support for the short-flow recycling of spent lithium-ion batteries without conventional solvent extraction processes.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115133"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081810","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":"Copper-catalyzed VOCs formation and combustion control during pyrolysis of waste polyester-imide enameled wires","authors":"Shengyue Ma ,&nbsp;Huiquan Li ,&nbsp;Chenye Wang ,&nbsp;Peng Xing","doi":"10.1016/j.wasman.2025.115131","DOIUrl":"10.1016/j.wasman.2025.115131","url":null,"abstract":"<div><div>The emission of volatile organic compounds (VOCs) during the pyrolysis of waste enameled wires poses a significant challenge to green and sustainable recycling. This study systematically investigates the formation mechanisms and mitigation strategies for VOCs during the pyrolysis of waste polyester-imide enameled wires, with a focus on the catalytic role of copper. Combining thermogravimetric analysis, PY-GC/MS, and density functional theory (DFT) calculations, we demonstrate that VOCs emissions primarily occur between 500–700 °C, generating alkanes, alkenes, and aromatic compounds. DFT reveals that copper modifies the electronic structure of the organic film, reducing the HOMO-LUMO energy gap and significantly accelerating pyrolysis reactivity, thereby promoting aromatic compound formation. To address this issue, an optimized combustion strategy (600 °C, excess air ratio of 1.10, furnace pressure of −0.04 MPa) was developed, which achieved a 95 % reduction in VOCs emissions compared to conventional pyrolysis. Mechanistic studies confirm that combustion effectively oxidizes most VOCs into CO₂ and H₂O, leaving only trace aldehyde residues. These findings not only elucidate the catalytic pathways of copper in VOCs formation but also provide a practical and efficient approach for VOCs suppression, advancing the development of environmentally friendly recycling technologies for electronic waste.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115131"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076152","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":"E-waste recycling: Integrated life cycle assessment and techno-economic analysis unravels pyrometallurgy’s edge and delivers an optimization framework for recovering waste printed circuit boards","authors":"Xuan Wang ,&nbsp;Wen Huang ,&nbsp;Beibei Yan ,&nbsp;Shengquan Zhou ,&nbsp;Xiaochao Zhu ,&nbsp;Zhi Wang ,&nbsp;Zhanjun Cheng ,&nbsp;Guanyi Chen","doi":"10.1016/j.wasman.2025.115135","DOIUrl":"10.1016/j.wasman.2025.115135","url":null,"abstract":"<div><div>With electronic waste growing at 3 %–5 % annually, metals can be recycled. Pyrometallurgy, while effective for recovering crude copper from waste printed circuit boards (WPCBs), faces significant challenges in environmental impact mitigation and economic feasibility. This study implemented life cycle assessment (LCA) and techno-economic analysis (TEA) based on first-hand industrial data from an enterprise in China to compare environmental-economic performance and policy adaptability across present pyrometallurgy (BAU), three optimized technologies (T1: Natural gas substitution for diesel, T2: Waste heat recovery for power generation, T3: Integrated optimization of “T1 + T2”) and hydrometallurgy. It was revealed that significant electricity consumption dominated the environmental hotspots in pyrometallurgy due to China’s reliance on coal-fired power grids, contributing 31.84 %–64.25 % and 31.85 %–49.86 % across all midpoint and endpoint indicators. While T1 achieved &lt;5 % per-ton environmental gains, its emission reduction benefits became notable at 3614 tons/year. T2 reduced environmental burdens by 7.18 %–51.58 % through waste heat-to-energy conversion that cut electricity demand. Furthermore, T3 achieved optimal performance in 17 midpoint indicators and three endpoint categories, reducing environmental impact by 7.26 %–51.73 % and 30.22 %–40.46 %, respectively. From techno-economic perspective, T3 delivered the highest economic feasibility with a payback period of 4.69 years and remained viable under stricter environmental taxes or corporate tax hikes. Sensitivity analysis revealed that grid decarbonization could reduce environmental burden of traditional pyrometallurgy by 20.44 %–40.92 %, highlighting the synergistic necessity of energy transition and process optimization. This study provides a technical selection framework and policy insights for green recycling of WPCBs, advancing circular economy and dual carbon goals.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115135"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076207","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":"Enhancing sorting efficiency in cluttered construction and demolition waste streams via boundary-guided grasp detection","authors":"Vineet Prasad,&nbsp;Mehrdad Arashpour","doi":"10.1016/j.wasman.2025.115123","DOIUrl":"10.1016/j.wasman.2025.115123","url":null,"abstract":"<div><div>Robotic automation is instrumental in the valorization of construction and demolition waste (CDW), facilitating scalable and efficient material recovery in response to rising waste volumes from accelerated urban development. AI-driven computer vision (CV) has advanced perception-focused tasks in CDW processing, such as classification, object detection, and segmentation. However, the subsequent action-focused task of robotic CDW grasp detection remains underexplored. Identifying optimal, collision-free gripper poses for CDW recyclables is particularly challenging in cluttered environments and is further limited by the need for large amounts of grasp-annotated training data. This paper therefore presents a robust CDW grasp detection method that leverages boundary features of CDW objects to guide grasp predictions via attentional feature fusion. Our approach builds upon recent advances in shape-aware CDW instance segmentation and takes advantage of the growing availability of high-quality segmentation data, enabled by automated labelling techniques using large language models (LLMs). To address the shortage of publicly available grasp-annotated CDW data, we also introduce ReCoDeWaste; the first RGB-D CDW instance segmentation and grasp detection dataset tailored for off-site AI-based sorting training and evaluation. Designed to capture the compositional complexity of CDW, ReCoDeWaste contains over 100,000 annotated waste object instances across diverse cluttered scenes. Experimental results demonstrate that our boundary-guided grasp detection model predicts collision-free grasps for detected recyclables in these cluttered streams, outperforming state-of-the-art methods in standard evaluation metrics and achieving up to 94.36% grasp detection accuracy. This research serves to enhance CDW valorization by transitioning efforts to action-focused CV tasks that go beyond recognition and classification.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115123"},"PeriodicalIF":7.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081719","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":"Gasification of wood packaging waste and valorization of char in polymer composites","authors":"Vittoria Benedetti ,&nbsp;Stefano Piazzi ,&nbsp;Marco Scatto ,&nbsp;Elisabetta Santello ,&nbsp;Markus Kollmer ,&nbsp;Grigorios Itskos ,&nbsp;Konstantinos Atsonios ,&nbsp;Francesco Patuzzi ,&nbsp;Marco Baratieri","doi":"10.1016/j.wasman.2025.115128","DOIUrl":"10.1016/j.wasman.2025.115128","url":null,"abstract":"<div><div>This study explores the possibility of repurposing wood packaging residues (WPR) through gasification, adopting a polygenerative approach yielding not only gas, but also char to be valorized as a filler/pigment in polymers. A commercial biomass gasifier was used to test standard pellets (PS) and WPR-derived pellets (PW). Pretreatment was needed to limit metal contaminants in PW, which nonetheless showed higher ash (15.7 vs. 11.1 wt%), and metal content (especially Fe, Cu, and Pb) than PS, affecting the resulting char composition. While feedstock variations primarily affected the inorganic composition and the porosity of the char, operating conditions were found to play a dominant role only in influencing char porosity (with the specific surface area reaching the maximum value of 1006 m²/g). Under standard conditions, PW gasification yielded slightly less char (1.1 vs. 1.3 wt%) but achieved higher cold gas efficiency (60.7 % vs. 56.6 %). The resulting char was tested in polymer matrices, performing well as a black pigment with minimal reduction in tensile properties, thus offering a sustainable alternative to carbon black.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115128"},"PeriodicalIF":7.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058682","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":"Lattice oxygen release characteristics of perovskite oxygen carriers synergized with iron-rich sludge ash","authors":"Kun Wang ,&nbsp;Wenzheng Liang ,&nbsp;Sheng Yao ,&nbsp;Xiaoying Yuan ,&nbsp;Min Xie ,&nbsp;Cuiping Wang","doi":"10.1016/j.wasman.2025.115098","DOIUrl":"10.1016/j.wasman.2025.115098","url":null,"abstract":"<div><div>Given that both sludge ash and iron-based oxygen carriers (OCs) are rich in the active component Fe₂O₃, it is necessary to investigate whether there exists a synergistic effect that enhances oxygen transport and stabilizes OCs. This work focuses on lattice oxygen release characteristics and reduction kinetics of industrially prepared CaMn_0.5Fe_0.5O_3-δ perovskite OCs (POC), sewage sludge ash (SSA), and their 1:1 mixture (POC/SSA) using thermogravimetric analysis (TGA) via varying hydrogen concentrations (5–25 %) and terminal temperatures (800–900 °C). The results reveal that the presence of SSA slightly delays the oxygen uncoupling process of POC, with the actual weight loss being slightly higher than the theoretical weighted value. This difference diminishes as terminal temperature increases. Notably, POC/SSA exhibits significant synergistic effects under low temperatures and highly reducing atmospheres, particularly at 25 % H₂ and 800 °C, where the actual weight loss (14.52 %) exceeds the theoretical value (12.96 %). The activation energy (<em>E</em>_a) of the reduction for the mixed sample is 46.135 kJ/mol, which is 1.973 kJ/mol lower than the theoretical weighted value, indicating a positive synergistic effect. This is attributed to the optimization of oxygen migration pathways via interfacial active sites and lattice defects, thereby enhancing the reactivity of POC. Furthermore, the SSA in synergy significantly increases the specific surface area of POC (from 14.28 m²/g to 137.6 m²/g) and pore volume, further improving reaction performance. This study provides valuable insights into the application of chemical looping technology for sludge treatment.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115098"},"PeriodicalIF":7.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058662","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":"Pilot-scale reactor for removing VOCs from a biowaste treatment plant: removal performance, degrading microorganisms, and their functional genes","authors":"Qihao Feng ,&nbsp;Zhishu Liang ,&nbsp;Wen Liao ,&nbsp;Guiying Li ,&nbsp;Weiping Zhang ,&nbsp;Taicheng An","doi":"10.1016/j.wasman.2025.115124","DOIUrl":"10.1016/j.wasman.2025.115124","url":null,"abstract":"<div><div>The widespread generation and treatment of biowaste contribute to odorous volatile organic compounds (VOCs) emissions and health issues and are a challenge to contemporary society. This study designed equipment that integrated a chemical washing tower (CWT) with a biotrickling filter (BTF) to remove VOCs from a biowaste treatment plant and reduce associated health risks. The total VOC concentrations at the biowaste treatment plant ranged from 700.1 to 1800.0 ppb and aliphatic hydrocarbons and volatile organic sulfur compounds (VOSCs) were the dominant VOCs. The inoculum added to the system contained <em>Bacillus, Burkholderia</em>, and other effective microorganisms. It removed 97.9 % of VOSCs (5 ppm) within 3 days under laboratory conditions. At the pilot scale, the combined CWT-BTF system removed 84.0 % of VOCs, with the BTF unit demonstrating superior performance compared to the CWT. The health risks of some VOCs decreased after purification, although the non-cancer and cancer risks remained above acceptable levels. After inoculation, the dominant microorganisms in the BTF changed from <em>Bacillus, Klebsiella,</em> and <em>Burkholderia pseudomultivoran</em> to <em>Polynucleobacter, Verrucomicrobia,</em> and <em>Planctomycetota,</em> which were primarily involved in energy metabolism pathways. Additionally, <em>Polynucleobacter</em> sp. 16-46-70 was found to be involved in sulfur metabolic pathways. Genes related to sulfur metabolism (<em>cysK</em>, <em>cysJ</em>, and <em>metB</em>) and nitrogen metabolism (<em>gltB</em>, <em>GDH2</em>, <em>nirB</em>, and <em>niT</em>) were involved in VOCs removal in BTF. This study indicates that the CWT-BTF technique at suitable loading rates is an effective method for removing VOCs emitted by biowaste and offers insights into the bacteria and genes that hold potential for enhancing removal efficiency.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115124"},"PeriodicalIF":7.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060276","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}