Waste management最新文献

{"title":"An electricity-powered future for mixed plastic waste chemical recycling","authors":"Stavros A. Theofanidis ,&nbsp;Evangelos Delikonstantis ,&nbsp;Vasileia-Loukia Yfanti ,&nbsp;Vladimir V. Galvita ,&nbsp;Angeliki A. Lemonidou ,&nbsp;Kevin Van Geem","doi":"10.1016/j.wasman.2024.12.003","DOIUrl":"10.1016/j.wasman.2024.12.003","url":null,"abstract":"<div><div>In contemporary times, global plastic waste production has doubled in comparison to two decades ago, with only 9% effectively recycled. The polymer industry is undergoing a transition to address the disparity between plastic production and end-of-life waste management. Chemical recycling offers a solution by converting plastic waste into its constituent building blocks, or monomers, which can be utilized in the production of new, high-quality plastics. This concise review provides an overview of conventional chemical recycling technologies employing heated reactors, before delving into ongoing efforts towards electrifying the chemical recycling process. A conceptual framework for a fully electrified value chain aimed at achieving plastics circularity is outlined and analyzed. Additionally, attention is given to the challenges posed by industry inertia towards adopting electrified technologies, as well as performance issues stemming from the intermittent nature of renewable energy sources and the availability of long-duration renewable electricity storage options.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 155-170"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the sustainability of rubber materials: Dual benefits of wet mixing technology and recycled rubber’s honeycomb reinforcement structure","authors":"Maohui Wang ,&nbsp;Zhanfu Yong","doi":"10.1016/j.wasman.2024.12.012","DOIUrl":"10.1016/j.wasman.2024.12.012","url":null,"abstract":"<div><div>The world’s three leading tire manufacturers have proposed specific timelines for using recycled materials. For instance, Michelin targets an increase in the proportion of sustainable materials in tires to 40 % by 2030 and aims to produce 100 % of its tires from bio-based, renewable, or recyclable materials as of 2050. In such a context, this study introduced wet mixing technology to apply recycled rubber (RR) in highly wear-resistant tire tread compounds. This technique leverages the rubber’s inherent crosslink density to enhance the mechanical performance of final products. The results indicated that wet mixing effectively addressed the high viscosity issue of RR. In the traditional dry mixing method, physical blending typically results in large particle sizes and suboptimal performance. In contrast, wet mixing reduced the rubber’s hysteresis loss by 75 % and improved its rebound performance by 35.6 % at 23 °C, 60 °C, and 100 °C compared to traditional dry mixing. DIN volume abrasion was also reduced by 23.3 %. Remarkably, Akron abrasion nearly doubled its effect. Additionally, wet mixing regulated aggregate structure and formed a densely packed honeycomb-like structure within RR. Incorporating RR using wet mixing demonstrates noticeable advantages in carbon black/natural rubber/RR composite materials. This approach also presents a viable path to sustainable development in the rubber manufacturing industry.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 190-198"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822215","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":"Predicting the composition of solid waste at the county scale","authors":"Joshua T. Grassel ,&nbsp;Adolfo R. Escobedo ,&nbsp;Rajesh Buch","doi":"10.1016/j.wasman.2024.12.002","DOIUrl":"10.1016/j.wasman.2024.12.002","url":null,"abstract":"<div><div>The primary goals of this paper are to facilitate data-driven decision making in solid waste management (SWM) and to support the transition towards a circular economy, by providing estimates of the composition and quantity of waste. To that end, it introduces a novel two-phase strategy for predicting municipal solid waste (MSW). The first phase predicts the waste composition, the second phase predicts the total quantity, and the two predictions are combined to give a comprehensive waste estimate. This novel approach overcomes limitations of existing methods that rely on material-specific quantity data, facilitating the prediction of dozens of waste material streams; existing methods typically classify MSW into no more than 10 categories, and often reduce it to a single aggregate total. To implement this strategy, the proposed study utilizes publicly available data encompassing demographic, economic, and spatial predictors, in conjunction with waste sampling reports. In addition, it develops a Least Absolute Shrinkage and Selection Operator (LASSO) regression model to estimate the MSW composition across 43 comprehensive material categories. The LASSO model is designed to predict MSW composition distinctly from quantity. The model’s capability is demonstrated through case studies, showcasing its potential to provide detailed waste estimates at the U.S. county level.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 293-306"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142855337","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":"Climate change impacts of biological treatment of liquid digestate from the anaerobic digestion of food waste","authors":"A.S. Varling,&nbsp;V. Chrysochoidis,&nbsp;V. Bisinella,&nbsp;B. Valverde-Pérez,&nbsp;T.H. Christensen","doi":"10.1016/j.wasman.2024.12.013","DOIUrl":"10.1016/j.wasman.2024.12.013","url":null,"abstract":"<div><div>The liquid fraction of digestate (LFD) from anaerobic digestion of food waste contains high nitrogen concentrations, and in some countries, the LFD is treated as wastewater. We modelled alternative LFD treatments, including pretreatment with the partial nitritation Anammox (PNA) process. The PNA effluent is discharged to the sewers to undergo further treatment by conventional nitrification and (post- or pre-) denitrification. Life-cycle inventories were developed for the LFD treatment alternatives, including N₂O emissions and electricity consumption estimates. The climate change (CC) impact was estimated using life cycle assessment in three different energy systems ranging from fossil-based to fully renewable. In the fossil energy system, pretreatment with PNA was attractive, while in the more renewable energy systems, the PNA process did not improve the CC account due to high N₂O emissions. Pre-denitrification is the most attractive LFD treatment technology in a fully renewable energy system. Linking the LFD treatment to the anaerobic digestion of food waste showed that LFD treatment is a significant contributor to the overall CC account. As we move towards less fossil-based electricity, the anaerobic digestion of food waste constitutes a CC load of 350–450 kg CO₂-eq/tonne biowaste, of which up to a third can be attributed to the LFD treatment. The N₂O emissions are the main contributor, constituting up to 50 % in a fossil-based energy system and even higher in a renewable energy system. We conclude that the LFD treatment must be addressed in assessing anaerobic digestion when the LFD is discharged to the sewer. Our study also points to the need to find alternative ways of managing the LFD.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 339-349"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring urban scenarios of individual residential waste sorting using a spatially explicit agent-based model","authors":"Jonathan Cohen,&nbsp;Jorge Gil,&nbsp;Leonardo Rosado","doi":"10.1016/j.wasman.2024.12.020","DOIUrl":"10.1016/j.wasman.2024.12.020","url":null,"abstract":"<div><div>Managing the diverse waste fractions generated by households presents a significant environmental and logistical challenge. One widely adopted solution is waste sorting at the source, where residents are required to separate their waste into designated containers. The success of this strategy depends on the extent of adoption and the behaviour of residents. Waste separation is a complex activity influenced by various interrelated factors. While the Theory of Planned Behaviour (TPB) has been effectively applied to characterise waste-sorting behaviour, it primarily focuses on internal psychological mechanisms, often overlooking environmental factors such as the placement of waste bins or the condition of sorting stations—critical elements for spatial planning. To bridge this gap, this study presents an agent-based model (ABM) that simulates residential waste sorting in urban scenarios, incorporating TPB for the agents’ behavioural architecture (residents). Three features distinguish this ABM from previous efforts: (i) Agents in the model are residents and not aggregated households, allowing for a one-to-one integration with TPB; (ii) the ABM bridges the gap between individual waste sorting behaviour extracted by TPB and outcomes quantifiable through waste sorting metrics; and (iii) the ABM is spatially explicit, enabling the exploration of various urban scenarios.</div><div>The ABM was applied to two urban areas with differing population densities, demonstrating that changes in bin placement impacts sorting behaviour, and proximity to recyclable waste bins influences the correct sorting of residual waste. This study illustrates how modelling the interaction between the urban environment and waste sorting behaviour can reveal the impact of individual residents’ actions on overall waste sorting performance.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 350-362"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of urban park litter pollution","authors":"Loris Pietrelli ,&nbsp;Stefania Di Vito ,&nbsp;Elisabetta Lacolla ,&nbsp;Antonella Piozzi ,&nbsp;Elisa Scocchera","doi":"10.1016/j.wasman.2024.11.047","DOIUrl":"10.1016/j.wasman.2024.11.047","url":null,"abstract":"<div><div>Monitoring campaigns to collect and characterize urban park litter have been carried out in Italy annually from 2018 to 2023. A total of 274 urban parks in 108 cities (with 745 inhabitants to 2.7 million) were monitored. The citizen science approach was applied, and each campaign involved yearly an average of 416 volunteers coordinated by Legambiente. An adaptation of the sampling protocol proposed by the Marine Strategy Framework Directive (MSFD) Technical Group on Marine Litter (2008/56/CE) was applied. In total 161,293 (mean value 26,882.2 ± 4,743.4) items were collected within 42,300 m² (density 3.82 items/m²). Cigarette butts are the most widespread waste: 36.3 % ± 5.5 % and up to 25 butts/m² were found. Significant amounts of metal (16.2 %), glass/ceramics (13.0 %) and paper/cardboard (10.7 %) were found. Despite the COVID emergency having ended in 2021, during the 2022 monitoring campaign face masks only represent 0.2 % of the total waste items. No correlation was found between the amount of waste and the number of inhabitants or the geographical position of the city. The population density was poorly correlated with the quantity of waste collected while a slight correlation was evidenced by the presence of plastic bottles which seem to have decreased in recent years. Using the FTIR Spectroscopy 19 different polymers were identified. The most common were cellulose acetate (cigarette butts) polyethylene and polypropylene. Following the application of recent SUP regulations, polylactic acid and starch blended biopolymers were found (till 0.3 %). Finally, the presence of highly degraded polymers was observed.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 95-104"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142792439","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":"Resource utilization of waste solar photovoltaic panels for preparation of microporous silicon nanoparticles","authors":"Qing Yue,&nbsp;Jia Wen,&nbsp;Yichen Zhou,&nbsp;Yuling Zheng","doi":"10.1016/j.wasman.2024.12.039","DOIUrl":"10.1016/j.wasman.2024.12.039","url":null,"abstract":"<div><div>With the exponential growth of global photovoltaic (PV) installed capacity, the quantity of discarded PV modules continues to rise. This study innovatively explored the sustainable recovery and utilization of raw materials from discarded solar panels, focusing on the transformation of recycled silicon into microporous silica nanoparticles (MSN). Low toxic organic solvent ethyl acetate (EA) was for the first time utilized to reduce the viscosity of ethylene–vinyl acetate (EVA) and facilitated its removal. A simple combination of nitric acid (HNO₃) and sodium hydroxide (NaOH) at low temperatures (225 min HNO₃ etching at room temperature followed by 40 min NaOH etching at 70 °C) completely removed the deep blue anti-reflective coating SiN_x and successfully removed metallic impurities such as silver (Ag), aluminum (Al). Removal efficiencies for Ag and Al electrodes both reached 99 %, with recovery rates of 92 % and 99 % for Ag and Al, respectively. The recycled Ag and Si had a purity of 99 % and 93.2 %, respectively. The recycled pure Si was then dissolved in a NaOH solution to prepare a sodium silicate (Na₂SiO₃) solution. Under acidic conditions, the non-ionic surfactant Triton X-100 and cationic surfactant cetyltrimethylammonium bromide (CTAB) were used to transform the Na₂SiO₃ solution to the MSN. The specific surface area of the MSN measured by BET was 855.30 m²/g, with a pore size of 1.85 nm and a pore volume of 0.3963 cm³/g. This study highlights the innovative utilization of recovered silicon to fabricate advanced microporous materials, paving the way for high-value applications and promoting a sustainable photovoltaic industry.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 495-505"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142910940","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":"Novel insights into released hydrochar particle derived from typical high nitrogen waste biomass: Special properties, microstructure and formation mechanism","authors":"Wenjing Guo ,&nbsp;Zhiyong Zhang ,&nbsp;Bingyu Wang ,&nbsp;Lihong Xue ,&nbsp;Yanfang Feng","doi":"10.1016/j.wasman.2024.12.024","DOIUrl":"10.1016/j.wasman.2024.12.024","url":null,"abstract":"<div><div>Hydrothermal carbonization (HTC) treatment is a promising method to transforming waste biomass into valuable resources and promoting waste recycling, especially for high nitrogen feedstocks. While small-sized hydrochar particle (≥0.45 μm) released from its solid product (hydrochar) application demonstrated large knowledge gaps compared with its original hydrochar and “secondary char” from model biomass (like glucose, sucrose, and starch). Thus, hydrochar particles derived from typical high nitrogen biomass, kitchen garbage (KG), and blue–green algae mud (AM), were collected to investigate their basic properties, microstructures and corresponding formation mechanisms. The results were: 1) the micron-sized hydrochar particles with yields as 3.42–7.86 wt% presented special characteristics, i.e., poor porous structures, moderate pH value, negative surface charge and higher surface hydrophobicity (contact angles as 95.00–117.67°) relative to original hydrochar and secondary char; 2) micronuclei aromatic core and hydrophobic hydrothermal polymers (methoxyl groups/alkyl chain with ether and carboxy groups) were identified in these hydrochar microparticles (HMPs) by jointly using differential thermogravimetry (DTG) analysis, Gaussian fitting model and thermogravimetric analysis combined with Fourier transform infrared spectrometry and mass spectrometry (TG-FTIR-MS) analysis; 3) polycondensation/cyclization reactions and Maillard/Mannich reaction in the KGHMPs, as well as solid–solid conversion and Maillard/Mannich reaction, polymerization reaction in AMHMPs core and its shell were proposed as their dominated formation mechanisms. The conclusions of this study indicated strong binding of HMPs with NH₄⁺, metals, and hydrophobic contaminants, and further reinforcing these application effects as soil fertilizer and decontaminant in soil/water for the N conversion, which also significantly depend on HTC temperature and feedstock.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 517-528"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142914837","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":"Comprehensive analysis of compost maturity differences across stages and materials with statistical models","authors":"Shang Ding,&nbsp;Donglei Wu","doi":"10.1016/j.wasman.2024.12.011","DOIUrl":"10.1016/j.wasman.2024.12.011","url":null,"abstract":"<div><div>Aerobic composting is an environmentally friendly and effective approach to treating organic solid waste. The variability in material composition introduces complex interactions between environmental factors and materials, which in turn affects compost maturity. This study uses multiple statistical analyses to systematically compare key indicators across composting processes for kitchen waste, livestock manure, and sludge. The results show that material type and composting stage have a significant impact on compost maturity (<em>p</em> &lt; 0.001). High-precision modeling (R² &gt; 0.90) was achieved using a Stacking model on the composting dataset, with interpretability analysis highlighting the important roles of temperature, moisture content, and nitrogen content across different composting materials. The combined effects of environmental and material changes jointly influence the composting progression. In kitchen waste composting, strong interactions between multiple indicators were observed, while moisture shifts in livestock manure and sludge composting primarily influenced compost maturity by promoting decomposition and enhancing nitrogen retention, respectively. Partial dependence analysis quantified the relationships between key indicators and compost maturity scores. These findings offer a scientific basis for identifying key factors and optimization paths in various composting processes, supporting the development of more effective composting strategies.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 250-260"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142829516","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":"Balanced water and heat energy recycling by full evaporation of wastewater (FEW) in dry biorefining processes of lignocellulose biomass","authors":"Ya Wang ,&nbsp;Bin Zhang ,&nbsp;Xiucai Liu ,&nbsp;Jie Bao","doi":"10.1016/j.wasman.2024.12.018","DOIUrl":"10.1016/j.wasman.2024.12.018","url":null,"abstract":"<div><div>Lignocellulosic biorefinery technology requires minimum energy consumption and wastewater generation to overcome challenges in industrial applications. This study established a rigorous model and a comprehensive physical property database of dry biorefining process on Aspen Plus platform for production including L-lactic acid, citric acid, sodium sugar acids, amino acid, and ethanol based on the experimental data. Full evaporation of wastewater (FEW) approach was proposed to completely replaced the external steam supply, and significantly reduced the freshwater input by 67% ∼ 85% and wastewater generation by 64% ∼ 89%, depending on the specific products. The carbon–neutral heat energy from lignin residue combustion generates an extra heat output of 1.098 ∼ 4.772 GJ per ton of dry wheat straw (DW) after all the heat energy needs of the biorefinery process and FEW treatments are satisfied, equivalent to a reduction of 0.219 ∼ 0.952 kg CO₂ eq/kg DM emission. This study provided a self-consistent solution for water and energy balance in biorefinery processes.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"Pages 307-316"},"PeriodicalIF":7.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142855670","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}