Circular Economy最新文献_第2页

Feasibility of hybrid energy systems for environmental remediation: Transforming closed landfills into sustainable energy hubs 混合能源系统用于环境修复的可行性：将封闭的垃圾填埋场转变为可持续的能源中心

Circular Economy

Pub Date : 2025-12-01 DOI: 10.1016/j.cec.2025.100168

Marcela C. Rodrigues , Luciano Cunha , Edgar A. Silveira , Antonio C.P. Brasil Junior

This article discusses an integrated operational arrangement for the remediation of the environmental impacts of landfills by implementing a hybrid electricity production system, which uses energy potential from municipal solid waste associated with solar energy (photovoltaics and thermal). This system composes a sustainable energy hub, which can provide numerous benefits in the recovery process of a closed landfill area. A case study is presented for the Jockey Clube landfill in Brazil, one of the largest landfill areas in Latin America, which was closed in 2018. Over 20 years of operation, the new hybrid plant is estimated to produce 2643 GWh of electricity and 964 GWh of heat from engine exhaust gases (529 °C) and steam production. Additionally, it achieves a leachate load reduction of 500,000 m³ per year and decreases atmospheric emissions by 38.4 thousand tons CO₂eq. per year through clean energy production and methane combustion. By addressing both environmental remediation and energy generation concurrently, this study highlights the potential of hybrid systems to deliver both environmental and economic benefits. The findings underline the importance of innovative waste management strategies in transitioning toward a sustainable and low-carbon future within circular economy principles, directly contributing to Sustainable Development Goals (SDGs) 7 (affordable and clean energy), 11 (sustainable cities and communities), and 13 (climate action). This study proposes a practical and replicable framework for converting environmental liabilities into productive assets, contributing to sustainable waste management and resource recovery.

本文讨论了通过实施混合电力生产系统来修复垃圾填埋场对环境影响的综合操作安排，该系统利用与太阳能（光伏和热能）相关的城市固体废物的能源潜力。该系统构成了一个可持续的能源中心，可以在封闭的垃圾填埋场的回收过程中提供许多好处。本文以巴西赛马会垃圾填埋场为例进行了研究，该填埋场是拉丁美洲最大的垃圾填埋场之一，于2018年关闭。在20年的运行中，新的混合电厂预计将产生2643吉瓦时的电力和964吉瓦时的发动机废气（529°C）和蒸汽产生的热量。此外，它还实现了每年减少50万立方米的渗滤液负荷，并减少了384000吨二氧化碳当量的大气排放。每年通过清洁能源生产和甲烷燃烧。通过同时解决环境修复和能源生产的问题，本研究强调了混合系统在环境和经济效益方面的潜力。研究结果强调了创新废物管理战略在循环经济原则下向可持续和低碳未来过渡的重要性，直接有助于实现可持续发展目标7（负担得起的清洁能源）、11（可持续城市和社区）和13（气候行动）。这项研究提出了一个实际和可复制的框架，将环境负债转化为生产性资产，促进可持续的废物管理和资源回收。

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引用次数: 0

Zero-waste Sports Events—A case study of the 19th Asian Games Hangzhou 零浪费体育赛事——以第19届杭州亚运会为例

Circular Economy

Pub Date : 2025-11-26 DOI: 10.1016/j.cec.2025.100172

Shanming Chen , Jiansong Cao , Xiaoyan Zhao

Large-scale sporting events are often associated with substantial solid waste generation due to venue construction and high attendee numbers. The 19th Asian Games Hangzhou, noted for its unprecedented participation, experienced a significant increase in waste. Nevertheless, through the integration of the “Zero-waste City” concept and green hosting mandates, Hangzhou Asian Games successfully became the first large-scale “Zero-waste Sports Event”. This study examines the development and achievements of the “Zero-waste Asian Games”, using the 19th Asian Games Hangzhou as a case study. The research involved an analysis of pertinent policy documents from Zhejiang Province and Hangzhou concerning waste management, the “Zero-waste City” model, and the “Zero-waste Asian Games”. The “Zero-waste Asian Games” proactively incorporated “zero-waste” principles across pre-event, in-event, and post-event activities, with a focus on source reduction, reuse, and responsible solid waste disposal. This study provides valuable insights for both “Zero-waste City” development and planning future “Zero-waste Events”.

由于场馆建设和观众人数众多，大型体育赛事通常会产生大量固体废物。以空前的参与度而闻名的第19届杭州亚运会，浪费现象明显增加。尽管如此，通过“零废物城市”理念与绿色主办任务的融合，杭州亚运会成功成为首个大型“零废物体育赛事”。本研究以第19届杭州亚运会为例，考察了“零浪费亚运会”的发展与成就。本研究分析了浙江省和杭州市有关废物管理、“零废物城市”模式和“零废物亚运会”的相关政策文件。“零废物亚运会”积极将“零废物”原则纳入赛前、赛中和赛后活动，重点是减少来源、再利用和负责任的固体废物处置。这项研究为“零废物城市”的发展和未来“零废物事件”的规划提供了宝贵的见解。

引用次数: 0

Assessing solid waste management effectiveness using the “Zero-waste index” — Exploration and practice in Chongqing 用“零废物指数”评价固体废物管理效果——重庆市的探索与实践

Circular Economy

Pub Date : 2025-09-28 DOI: 10.1016/j.cec.2025.100167

Hongying Cai , Zhenhan Duan , Junqiang Lv , Lianchuan Zhou , Qiong Zhou , Yusen Yan , Juan Long , Jianwei Du

“Zero-waste City” (ZWC) is an innovative urban development model aimed at reducing solid waste generation, minimizing resource loss, and mitigating environmental impacts. In China, over 100 cities have implemented ZWC initiatives under the 14^th Five-Year Plan, focusing on source reduction and resource recovery across the industrial, agricultural, residential, and construction sectors. However, the absence of quantitative, integrated, and real-time assessment tools has hindered comprehensive evaluation of ZWC progress. To address this gap, this study proposes a “Zero-waste Index” (ZWI) system comprising 15 indicators across seven thematic categories designed to quantify solid waste management performance at the sub-municipal level. The ZWI was empirically applied to 41 districts and counties in Chongqing, a megacity characterized by extensive territorial scope, significant socioeconomic disparities, and uneven levels of administrative infrastructure. Results from two consecutive quarters in 2024 reveal a 12% increase in the citywide average ZWI scores, highlighting strong performance in agricultural and household waste utilization and in energy conservation efforts by public institutions, while also indicating persistent weaknesses in industrial waste management, construction waste compliance, and plastic pollution control, particularly in the Southeastern and Northeastern Areas of Chongqing. ZWI also functions as a governance tool, facilitating feedback-driven performance improvement across districts. Although challenges such as subjective weight allocation and data inconsistencies remain, the ZWI provides a replicable framework for real-time performance tracking and policy feedback, offering valuable insights for other cities seeking to advance “Zero-waste” strategies and improve solid waste management.

“零废物城市”（ZWC）是一种创新的城市发展模式，旨在减少固体废物的产生，最大限度地减少资源损失，减轻环境影响。在中国，超过100个城市已经在“十四五”规划中实施了“零碳世界”倡议，重点关注工业、农业、住宅和建筑领域的源头减少和资源回收。然而，缺乏定量、综合和实时的评估工具，阻碍了对ZWC进展的全面评估。为了解决这一差距，本研究提出了一个“零废物指数”（ZWI）系统，该系统包括七个主题类别的15个指标，旨在量化次城市一级的固体废物管理绩效。以重庆41个区县为研究对象，进行了实证分析。重庆是一个地域范围广、社会经济差异大、行政基础设施水平参差不齐的特大城市。2024年连续两个季度的结果显示，全市平均ZWI得分增长了12%，突出了农业和生活垃圾利用以及公共机构节能工作的强劲表现，同时也表明工业废物管理，建筑垃圾合规和塑料污染控制方面的持续薄弱，特别是在重庆东南部和东北部地区。ZWI亦发挥管治工具的作用，促进各地区以反馈为导向的绩效改善。尽管主观权重分配和数据不一致等挑战仍然存在，但ZWI为实时绩效跟踪和政策反馈提供了一个可复制的框架，为寻求推进“零废物”战略和改善固体废物管理的其他城市提供了宝贵的见解。

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引用次数: 0

Efficient recycling of glass fibers from waste printed circuit boards using metal-organic framework composites for photocatalytic degradation 利用金属-有机框架复合材料进行光催化降解，有效回收废弃印刷电路板中的玻璃纤维

Circular Economy

Pub Date : 2025-09-27 DOI: 10.1016/j.cec.2025.100166

Shiwei Wang , Sui Mao , Chuanjin Guan , Wenyi Yuan , Mengjiao Wu

In recent years, the disposal of waste printed circuit boards (WPCBs) has emerged as an increasingly serious issue, particularly concerning the non-metallic powder generated during metal recovery, which poses a significant challenge to the utilization of e-waste resources. Furthermore, numerous technical defects are associated with this process. A systematic method is presented for preparing glass fiber ball bundles (GfBs), which incorporate a variety of metal-organic frameworks (MOFs) to create GfB/MIL-125 (Ti), GfB/MIL-100 (Fe), GfB/Bi₂MoO₆, and GfB/Bi₂MoO₆/MIL-100 (Fe) process systems. This approach aims to increase the efficiency of recycling glass fibers from the non-metallic powders of WPCBs. This study aims to investigate the photocatalytic degradation performance of composite materials comprising glass fibers loaded with MOFs, specifically GfB/MIL-100(Fe), GfB/Bi₂MoO₆, and GfB/Bi₂MoO₆/MIL-100(Fe), on model wastewater containing the organic compound methylene blue (MB). These findings indicate that the composites exhibited high photocatalytic efficiency and good reusability. The synthesized MOF composites achieved photocatalytic degradation of 100 mL of a 50 mg/L MB solution, reaching up to 96% degradation in 3 h, with a residual removal rate of 85% after 5 cycles. This study provides novel insights into the recycling of non-metallic materials from waste circuit boards and the development of environmentally friendly photocatalysts.

近年来，废旧印刷电路板（wpcb）的处理已成为一个日益严重的问题，特别是金属回收过程中产生的非金属粉末，对电子垃圾资源的利用提出了重大挑战。此外，许多技术缺陷与此过程相关。提出了一种制备玻璃纤维球束（GfBs）的系统方法，该方法包含多种金属有机框架（MOFs），以创建GfB/MIL-125 (Ti), GfB/MIL-100 (Fe)， GfB/Bi2MoO6和GfB/Bi2MoO6/MIL-100 （Fe）工艺体系。该方法旨在提高从wpcb的非金属粉末中回收玻璃纤维的效率。本研究旨在研究由玻璃纤维组成的mof负载复合材料，特别是GfB/MIL-100(Fe)， GfB/Bi2MoO6和GfB/Bi2MoO6/MIL-100（Fe）对含有机化合物亚甲基蓝（MB）的模型废水的光催化降解性能。结果表明，该复合材料具有较高的光催化效率和良好的可重复使用性。合成的MOF复合材料对100 mL 50 mg/L的MB溶液进行光催化降解，3 h降解率达96%，循环5次后残留去除率达85%。本研究为废电路板非金属材料的回收利用和环境友好型光催化剂的开发提供了新的见解。

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引用次数: 0

Corrigendum to “Biotechnological approaches: Degradation and valorization of waste plastic to promote the circular economy” [Circular Economy 3(1) (2024) 100077] “生物技术方法：废塑料的降解和增值以促进循环经济”的勘误表[循环经济3(1)(2024)100077]

Circular Economy

Pub Date : 2025-08-16 DOI: 10.1016/j.cec.2025.100159

Sridevi Veluru , Ramakrishna Seeram

引用次数: 0

Development and characterization of brewers’ spent grain-based materials 酿酒用废粮基材料的开发与表征

Circular Economy

Pub Date : 2025-08-05 DOI: 10.1016/j.cec.2025.100158

Antonietta Baiano, Anna Fiore

Brewers’ spent grain (BSG) is the main by-product of brewing processes. As a lignocellulosic material, BSG is suitable for producing disintegrable composite materials and packaging. Our research aimed to develop BSG-based formulations with and without corn starch that are suitable for producing objects through thermomoulding. The thermomoulding temperature was fixed at 200 °C, and the thermomoulding time ranged from 4 to 30 min. The effects of the thickness (2, 5 and 10 mm), addition of corn starch and BSG type (W (wet), U (dried and unground), P (dried, unground and hot-water treated before use) and M (dried and milled)) on the physical and mechanical properties, absorption capacity, disintegration degree and solubility of the tray materials were investigated. All formulations were characterized by high water absorption (>71.73%), weight loss (46.73%–67.58%) and solubility (30.78%–44.68%). The density, breaking strength and resistance to penetration decreased as the thickness increased, whereas no differences in the flexural strength were detected. The addition of starch reduced both the density and water absorption percentage and increased the penetration strength. With respect to the BSG state, the use of W-BSG resulted in the highest resistance to flexion (0.11 N/mm²) and the lowest resistance to penetration (2.15 N/mm); the use of M-BSG resulted in the highest resistance to penetration (6.36 N/mm). Principal component analysis highlighted that most of the materials developed had physical and mechanical characteristics that made them different from each other and therefore suitable for different uses.

酿酒者的废谷物（BSG）是酿造过程中的主要副产品。BSG是一种木质纤维素材料，适用于生产可分解复合材料和包装。我们的研究旨在开发以bsg为基础的配方，含有或不含玉米淀粉，适用于通过热成型生产物体。热成型温度为200℃，热成型时间为4 ~ 30 min。考察了厚度（2、5、10 mm）、玉米淀粉添加量、BSG类型（W（湿）、U（干燥、未研磨）、P（干燥、未研磨、使用前热水处理）和M（干燥、研磨））对托盘材料物理力学性能、吸收能力、崩解程度和溶解度的影响。各配方均具有较高的吸水率（71.73%）、失重率（46.73% ~ 67.58%）和溶解度（30.78% ~ 44.68%）。随着厚度的增加，材料的密度、断裂强度和抗侵彻能力下降，而抗折强度没有变化。淀粉的加入降低了密度和吸水率，提高了渗透强度。在BSG状态下，W-BSG的抗弯曲性能最高（0.11 N/mm2），抗穿透性能最低（2.15 N/mm）；使用M-BSG的抗侵穿性最高（6.36 N/mm）。主成分分析强调，大多数开发的材料具有物理和机械特性，使它们彼此不同，因此适合不同的用途。

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引用次数: 0

From construction for construction: Additive manufacturing with gas-atomized recycled steel scrap 从建筑到建筑：用气体雾化回收废钢进行增材制造

Circular Economy

Pub Date : 2025-07-31 DOI: 10.1016/j.cec.2025.100157

Jan-Simeon Ludger Bernsmann, Johannes Henrich Schleifenbaum

Climate change and energy scarcity, as well as changing socio-demographic structures and new user needs, drive major changes in the design, construction, and operation of buildings towards sustainability. As the building sector accounts for 35% of global energy consumption and 38% of global CO₂ emissions, the energy-efficient and sustainable design and maintenance of buildings will be an effective lever for creating sustainable living conditions in the future. The use of recycled materials in construction can reduce CO₂ emissions and ensure a circu`lar economy. In this work, a proof of concept is presented for additive manufacturing by laser powder bed fusion (PBF-LB/M) of metal powder obtained by gas atomization of recycled steel from demolished buildings. From the atomization of approximately 50 kg of steel scrap, 27.8 kg of particles finer than 90 μm were obtained, whereas particles ranging between 90 μm and 315 μm accounted for 14.1 kg. The samples made from the recycled powder had a relative density of 99.9%, no porosity and excellent mechanical properties. The average tensile strength of the produced material was 808 MPa, whereas the average yield strength was 716.4 MPa. These results demonstrate the feasibility and efficiency of using gas atomized recycled steel scrap for additive manufacturing, providing high-quality materials with excellent mechanical properties suitable for construction applications.

气候变化和能源短缺，以及不断变化的社会人口结构和新的用户需求，推动了建筑设计、建造和运营的重大变化，以实现可持续发展。由于建筑行业占全球能源消耗的35%和全球二氧化碳排放量的38%，节能和可持续的建筑设计和维护将成为未来创造可持续生活条件的有效杠杆。在建筑中使用回收材料可以减少二氧化碳排放，确保循环经济。在这项工作中，提出了激光粉末床熔融（PBF-LB/M）增材制造的概念证明，该增材制造是由拆除建筑物的回收钢的气体雾化获得的金属粉末。通过雾化约50 kg的废钢，获得了27.8 kg小于90 μm的颗粒，而90 μm至315 μm之间的颗粒占14.1 kg。回收粉末制备的样品相对密度为99.9%，无孔隙率，力学性能优良。所得材料的平均抗拉强度为808 MPa，平均屈服强度为716.4 MPa。这些结果证明了利用气体雾化回收废钢进行增材制造的可行性和效率，为建筑应用提供了具有优异力学性能的高质量材料。

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引用次数: 0

Investigating circularity in the construction and demolition sector through remote sensing: A case study of Bolzano/Bozen, Italy 通过遥感调查建筑和拆除部门的循环性：意大利Bolzano/Bozen的案例研究

Circular Economy

Pub Date : 2025-07-19 DOI: 10.1016/j.cec.2025.100156

Kseniia Shkirman , Anna Stoppato , Fabio Giussani , Simon Pezzutto

The built environment in urban areas contributes significantly to global waste generation through construction and demolition activities, highlighting the need for circular economy strategies to ensure sustainable development. Digital technologies offer fast and reliable methods to track material flows and improve resource efficiency. This study proposes a novel approach that integrates data from OpenStreetMap (OSM) and the Urban Atlas for land-use identification. The material stock (MS) is estimated via a geographic information system (GIS) to analyse the spatial characteristics of buildings, combined with material intensity (MI) data to assess the mass of materials within structures. Together with the quantification of material stock, hotspots of construction materials within the building stock are identified. When applied to the case study of Bolzano/Bozen, Italy, this approach estimated 130 tonnes per capita of accumulated building stock in the city and 40 tonnes per capita of material stock in infrastructure networks. This remote sensing methodology provides detailed insights into the quantity and distribution of materials in buildings and networks. The openness and availability of OSM data, as well as their independence from cadastral records, make this approach particularly advantageous for obtaining input data for the life cycle assessment (LCA) of buildings and the development of waste management strategies.

城市地区的建筑环境通过建筑和拆除活动极大地促进了全球废物的产生，突出表明需要采取循环经济战略以确保可持续发展。数字技术为跟踪物料流动和提高资源效率提供了快速可靠的方法。本研究提出了一种整合OpenStreetMap （OSM）和Urban Atlas数据进行土地利用识别的新方法。通过地理信息系统（GIS）估算材料存量（MS）来分析建筑物的空间特征，结合材料强度（MI）数据来评估结构内的材料质量。结合材料库存的量化，确定了建筑库存中建筑材料的热点。当应用于意大利Bolzano/Bozen的案例研究时，该方法估计城市的人均累积建筑存量为130吨，基础设施网络的人均材料存量为40吨。这种遥感方法提供了对建筑和网络中材料的数量和分布的详细见解。OSM数据的开放性和可用性，以及它们与地籍记录的独立性，使这种方法在获取建筑物生命周期评估（LCA）和制定废物管理战略的输入数据方面特别有利。

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引用次数: 0

Insights and practices for industrial solid waste management under “zero-waste city” construction in China 中国“零废物城市”建设下工业固体废物管理的见解与实践

Circular Economy

Pub Date : 2025-07-18 DOI: 10.1016/j.cec.2025.100155

Qifei Huang, Tong Zhao, Mingsong Lin, Weishi Li, Qi Zhou, Chao Chen

China's “zero-waste city” (ZWC) pilot program, initiated in 2018, has driven innovative practices in industrial solid waste (ISW) management across diverse urban contexts. This study categorizes cities into resource-output, manufacturing-oriented, and comprehensive types to propose tailored strategies that address unique industrial challenges while promoting sustainability. Resource-output cities prioritize ecological restoration through the transformation of abandoned mining sites, repurposing waste materials to restore degraded environments and support local economic development. Manufacturing-oriented cities focus on green industrial upgrades and circular economy models to enhance the comprehensive utilization of waste, reduce generation intensity, and foster market competitiveness for recycled products. Comprehensive cities, often large urban centers, have embraced digital technologies to optimize the precision management of ISW, thereby enhancing regulatory efficiency and resource utilization. These targeted approaches implemented thus far have let to measurable reductions in ISW generation, improved resource recovery, and notable economic co-benefits. The insights drawn from China's evolving ZWC framework not only contribute to a more sustainable and efficient waste management system domestically but also provide a valuable reference for international regions seeking to integrate industrial development with environmental protection.

中国于2018年启动的“零废物城市”试点项目，推动了不同城市环境下工业固体废物管理的创新实践。本研究将城市分为资源产出型、制造业导向型和综合型三类，并提出针对性的战略，以应对独特的工业挑战，同时促进可持续发展。资源产出型城市优先考虑生态修复，通过废弃矿区改造、废弃物资源化利用，恢复退化环境，支持当地经济发展。制造业导向型城市注重绿色产业升级和循环经济模式，以提高废物的综合利用，降低产生强度，培养回收产品的市场竞争力。综合性城市，通常是大型城市中心，已经采用数字技术来优化ISW的精准管理，从而提高监管效率和资源利用率。到目前为止实施的这些有针对性的方法已经显著减少了ISW的产生，改善了资源回收，并取得了显著的经济效益。从中国不断发展的ZWC框架中得出的见解不仅有助于在国内建立一个更可持续和高效的废物管理系统，而且为寻求将工业发展与环境保护相结合的国际地区提供了有价值的参考。

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引用次数: 0

Reducing food waste behaviors from the viewpoint of university students through the E-TPB model 通过E-TPB模型减少大学生的食物浪费行为

Circular Economy

Pub Date : 2025-07-18 DOI: 10.1016/j.cec.2025.100154

Yi Li , Yangyang Liang , Danfeng Yu , Liujie Xu , Qingbin Song

As a significant global issue, food waste has garnered considerable public attention because of food security and environmental sustainability. However, the current study overlooks the food waste behavior of university students in university canteens. This study, which is based on a systematic questionnaire survey of 1229 university students in Macao and Zhuhai, adopts the extended theory of planned behavior (E-TPB) to investigate the key factors influencing university students' food waste behaviors in school canteens by incorporating four additional variables. The results demonstrate that subjective norm emerged as the strongest predictor of university students' intentions, whereas intentions remained the strongest predictor of university students' food waste behavior (R² = 0.641). Among the four extended hypotheses, the economic impact and cognition of food waste have a significant effect on university students’ food waste behavior. This study revealed that increasing the level of awareness and positive attitudes toward food waste can help reduce food waste. Compared with those in Macao, the food waste behavior of respondents in Zhuhai was more influenced by the level of the economy. These research outcomes provide effective strategies for minimizing food waste within university canteens.

由于粮食安全和环境的可持续性，食物浪费作为一个重大的全球性问题已经引起了公众的广泛关注。然而，目前的研究忽视了大学生在大学食堂浪费食物的行为。本研究基于对澳门和珠海地区1229名大学生的系统问卷调查，采用扩展计划行为理论（E-TPB），结合四个附加变量，对影响大学生在学校食堂浪费食物行为的关键因素进行研究。结果表明，主观规范是大学生意图的最强预测因子，而意图仍然是大学生食物浪费行为的最强预测因子（R2 = 0.641）。在四个扩展假设中，对食物浪费的经济影响和认知对大学生的食物浪费行为有显著影响。本研究表明，提高对食物浪费的认识和积极态度有助于减少食物浪费。与澳门受访者相比，珠海受访者的食物浪费行为更受经济水平的影响。这些研究成果为减少大学食堂的食物浪费提供了有效的策略。

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引用次数: 0