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Recovery of waste anode materials in solid oxide fuel cells 回收固体氧化物燃料电池中的废弃阳极材料
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-05 DOI: 10.1016/j.resconrec.2024.107997
Gulsah Germen Tutas , Cigdem Timurkutluk , Sezer Onbilgin , Bora Timurkutluk
This study focuses on the recovery and recycling of production wastes from solid oxide cell (SOC) anode support manufacturing, specifically targeting the state-of-the-art NiO-YSZ (yttria stabilized zirconia) materials. A practical recovery strategy involving a burn-out process to remove additives is developed, followed by milling to manage grain growth and achieve desirable powder properties. The various reclaimed powders obtained after milling at different conditions are subsequently used to fabricate anode support microtubes through extrusion and tape casting coupled with isostatic pressing. Microtubular cells are also constructed on these supports. Comparative analyses of the mechanical and electrochemical performance, along with microstructural investigations, are conducted on supports and cells fabricated from both recovered and commercial powders. The findings indicate that anode supports fabricated from powders recovered through the suggested method exhibit flexural strengths and electrochemical performances comparable to those fabricated from commercial powders, thereby validating the effectiveness of the proposed recovery strategy.
本研究的重点是固体氧化物电池(SOC)阳极支架制造过程中生产废料的回收和循环利用,特别是针对最先进的 NiO-YSZ(钇稳定氧化锆)材料。研究人员开发了一种实用的回收策略,包括采用烧除工艺去除添加剂,然后进行研磨,以控制晶粒生长并获得理想的粉末特性。在不同条件下碾磨后获得的各种回收粉末,随后通过挤压和带式浇铸以及等静压工艺用于制造阳极支撑微管。在这些支撑物上还构建了微管电池。对利用回收粉末和商用粉末制造的支撑物和电池进行了机械和电化学性能比较分析以及微观结构研究。研究结果表明,用建议的方法回收的粉末制造的阳极支架,其抗弯强度和电化学性能可与用商用粉末制造的阳极支架相媲美,从而验证了建议的回收策略的有效性。
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引用次数: 0
Lab-scale biocomposite manufacturing: Exploring rice bran-based bioplastics reinforced with natural fillers through extrusion and injection molding 实验室规模的生物复合材料制造:探索通过挤出和注塑成型用天然填料增强米糠基生物塑料
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-05 DOI: 10.1016/j.resconrec.2024.107990
María Alonso-González , Manuel Felix , Alberto Romero , Claudia Sergi , Irene Bavasso , Fabrizio Sarasini
Bioplastics from agro-food industry by-products offer a sustainable alternative to the environmental concerns linked to petroleum-derived plastics. Rice bran (RB), an abundant and low-cost by-product rich in protein and starch, is a promising feedstock but poses challenges due to its complex composition. This study investigates the integration of natural fillers (cellulose, flax, and hazelnut shell) into a RB-based matrix. At low filler content (2 wt.%), all fillers increased stiffness from 138 MPa to 190, 184 and 196 MPa for cellulose, flax and hazelnut shell, respectively. Higher contents (5–10 wt.%) showed varied effects: flax and cellulose improved Young's modulus only up to 5 wt.% due to agglomeration, while hazelnut shell had beneficial effects even at 10 wt.% even for tensile strength (improving from 2.5 to 3.4 MPa). Additionally, all fillers enhanced viscoelastic moduli and thermal stability, with hazelnut shells showing the most significant improvements, making them a promising additive for bioplastics.
由农产食品业副产品制成的生物塑料是一种可持续的替代品,可解决与石油衍生塑料相关的环境问题。米糠(RB)是一种富含蛋白质和淀粉的低成本副产品,是一种前景广阔的原料,但由于其成分复杂,因此面临着挑战。本研究探讨了将天然填料(纤维素、亚麻和榛子壳)整合到基于米糠的基质中的问题。在填料含量较低(2 wt.%)时,所有填料都能将纤维素、亚麻和榛子壳的刚度从 138 MPa 分别提高到 190、184 和 196 MPa。更高的含量(5-10 wt.%)则显示出不同的效果:亚麻和纤维素仅在 5 wt.%以下由于团聚作用提高了杨氏模量,而榛子壳即使在 10 wt.%时也对拉伸强度有好处(从 2.5 兆帕提高到 3.4 兆帕)。此外,所有填料都提高了粘弹性模量和热稳定性,其中榛子壳的改善最为显著,因此成为一种很有前景的生物塑料添加剂。
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引用次数: 0
Probabilistic rewards increase the use of reusable cups 概率奖励可提高可重复使用杯子的使用率
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-04 DOI: 10.1016/j.resconrec.2024.108001
Simon B. Sheppard , Stella Argentopoulos , Juliet Ware , Alex Swearingen , Jessica Winfield , Jade Radke , Jiaying Zhao
Given the environmental threat posed by single-use disposable cups, increasing the use of reusable cups among consumers is vital. To achieve this goal, the current study examined how probabilistic rewards influenced the use of reusable cups at cafés on a university campus. In the pilot study, customers with reusable cups were offered a 5 % chance to win a $5 gift card. This probabilistic reward produced a significant increase in the use of reusable cups compared to baseline. In a separate field experiment, one café offered customers with reusable cups a 10 % chance to win a free coffee, while another café served as a control site without the reward. The probabilistic reward led to a significant increase in the use of reusable cups. Together, these findings provide initial support for the implementation of probabilistic rewards to increase the use of reusable cups, with empirical, theoretical, and practical implications for sustainable consumption.
鉴于一次性杯子对环境造成的威胁,增加消费者对可重复使用杯子的使用至关重要。为了实现这一目标,本研究考察了概率奖励对大学校园内咖啡馆使用可重复使用杯子的影响。在试点研究中,使用可重复使用杯子的顾客有 5% 的机会赢得一张价值 5 美元的礼品卡。与基线相比,这种概率奖励显著提高了可重复使用杯子的使用率。在另一项现场实验中,一家咖啡馆为使用可重复使用杯子的顾客提供了赢得免费咖啡的 10% 的机会,而另一家咖啡馆则作为没有提供奖励的对照场所。概率奖励使可重复使用杯子的使用率显著提高。总之,这些发现为实施概率奖励以增加可重复使用杯子的使用提供了初步支持,对可持续消费具有经验、理论和实践意义。
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引用次数: 0
Urine luck: Environmental assessment of yellow water management in buildings for urban agriculture 尿运:城市农业建筑黄水管理的环境评估
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-04 DOI: 10.1016/j.resconrec.2024.107985
María Virginia Maiza , Joan Muñoz-Liesa , Anna Petit-Boix , Verónica Arcas-Pilz , Xavier Gabarrell
The increasing global demand for agricultural production poses challenges to maintain the needs for critical fertilizers such as nitrogen. This study explores the potential of human urine as a source of renewable nitrogen for fertilizer production. Through a life cycle assessment, three different urine management strategies were compared: (S1) an artificial wetland, (S2) an on-site lab-scale aerobic reactor for nitrogen recovery, and (S3) a centralized wastewater treatment plant. While scenario S2 had the highest impacts in 6 out of 8 categories, an advantage in marine eutrophication was identified. S2 showed high energy demand (750 kg MJ-eq) and ecotoxicity (602 kg 1.4-DCB-eq.) mainly due to energy requirements. Nitrogen production exceeded 2.3 times the yearly nitrogen demands of the building tomato production. Upscaling S2 reduces impacts up to 2 times, lowering the payback time from 29 to 13 years. Therefore, implementing large-scale nitrogen recovery systems in cities is encouraged.
全球对农业生产的需求日益增长,这给维持氮肥等关键肥料的需求带来了挑战。本研究探讨了人尿作为肥料生产的可再生氮源的潜力。通过生命周期评估,对三种不同的尿液管理策略进行了比较:(S1)人工湿地;(S2)现场实验室规模的氮回收好氧反应器;(S3)集中式污水处理厂。虽然方案 S2 在 8 个类别中的 6 个类别中影响最大,但在海洋富营养化方面具有优势。S2 显示出较高的能源需求(750 千克 MJ-当量)和生态毒性(602 千克 1.4-DCB-eq.氮产量超过了建筑番茄生产年氮需求量的 2.3 倍。扩大 S2 的规模最多可将影响降低 2 倍,将投资回收期从 29 年降至 13 年。因此,鼓励在城市中实施大规模氮回收系统。
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引用次数: 0
A comparative study of iron-complex mediated cathodic vat dye reduction with dyebath regeneration by ultrafiltration, and the conventional dyeing process 以铁络合物为介质的阴极缸染色还原法、通过超滤进行染缸再生法和传统染色工艺的比较研究
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-02 DOI: 10.1016/j.resconrec.2024.107998
Thomas Bechtold, Noemí Aguiló-Aguayo, Tung Pham
The huge consumption of fresh water in the textile dyeing industry is a consequence of the use of chemicals, dyes and processes that are not compatible with recycling techniques. In this work pilot scale vat dyeing of yarn cones with use of electrochemically regenerable iron-complexes as reducing agents was investigated. A combination triethanolamine and heptagluconate was used for stable complexation of iron(III/II) at dyebath temperatures up to 80°C. At the end of the dyeing step the used dyebath was collected and oxidised by air oxygen. The dispersed oxidised vat dye was removed by filtration using a 0.45 µm PTFE membrane. A comprehensive analysis of the relevant waste water parameters demonstrated the potential of the technique to reduce the water consumption of the dyeing step by 68 % and to achieve significant reduction in chloride (-87 %), nitrate (-83 %) and sulphate (-99.6 %) load. Dependent on colour depth a replacement of single-use chemicals by this new technical concept will lead to significant chemical savings between 18 % and 72 % compared to the state of the art processes.
纺织印染工业对淡水的消耗量巨大,这是由于使用的化学品、染料和工艺与循环利用技术不相容。在这项工作中,研究了使用可电化学再生的铁络合物作为还原剂对纱线进行大桶染色的试验规模。三乙醇胺和七葡萄糖酸盐的组合可在高达 80°C 的染浴温度下稳定地络合铁(III/II)。染色步骤结束后,收集用过的染缸并用空气氧化。分散的氧化染缸染料通过使用 0.45 微米的聚四氟乙烯膜过滤去除。对相关废水参数的综合分析表明,该技术可将染色步骤的耗水量减少 68%,并显著降低氯化物(-87%)、硝酸盐(-83%)和硫酸盐(-99.6%)的负荷。与最先进的工艺相比,根据色深的不同,用这种新的技术概念取代一次性化学品可节省 18 % 到 72 % 的化学品。
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引用次数: 0
Development of a solvent based recycling process for agricultural film 开发基于溶剂的农用薄膜回收工艺
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-02 DOI: 10.1016/j.resconrec.2024.107981
Elisabetta Carrieri , Jordy Motte , Pieter Nachtergaele , Ine Mertens , Richard Hoogenboom , Jo Dewulf , Steven De Meester
Agricultural films are a major source of low density polyethylene (LDPE) waste, which is challenging to recycle, as it is often multilayer and can contain pigments such as titanium dioxide (TiO2) and carbon black. In this study a dissolution recycling process was developed, that was able to recover three outputs: LDPE, poly(ethylene-vinyl acetate) and TiO2 from the waste stream with a single solvent, either xylene or limonene. After dissolution, the pigments were successfully removed through filtration. Polymer precipitation was induced by cooling and thus no antisolvent was required. The recovered polymers showed promising characteristics, with purities higher than 98 %, while the recovered TiO2 showed a purity higher than 99 %. The prospective Life Cycle Assessment (LCA) revealed a total savings of 3.35 kg CO2 equivalent per kg of film waste (for the case of black and white multilayer film) compared to incineration including energy recovery. Furthermore, a sensitivity study showed that the solvent management is crucial for the sustainability of the process.
农用薄膜是低密度聚乙烯(LDPE)废弃物的一个主要来源,由于它通常是多层的,而且可能含有二氧化钛(TiO2)和炭黑等颜料,因此回收难度很大。这项研究开发了一种溶解回收工艺,能够回收三种产品:只需使用二甲苯或柠檬烯这一种溶剂,就能从废料流中回收低密度聚乙烯、聚(乙烯-醋酸乙烯)和二氧化钛。溶解后,通过过滤成功去除颜料。聚合物沉淀是由冷却引起的,因此不需要反溶剂。回收的聚合物显示出良好的特性,纯度高于 98%,而回收的二氧化钛纯度高于 99%。前瞻性生命周期评估(LCA)显示,与包括能源回收在内的焚烧法相比,每公斤薄膜废料(黑白多层薄膜)可节省 3.35 公斤二氧化碳当量。此外,一项敏感性研究表明,溶剂管理对于工艺的可持续性至关重要。
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引用次数: 0
Integrative optimization for energy efficiency, CO2 reduction, and economic gains in the iron and steel industry: A holistic approach 综合优化钢铁工业的能效、二氧化碳减排和经济效益:整体方法
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-31 DOI: 10.1016/j.resconrec.2024.107992
Hongming Na , Yuxing Yuan , Jingchao Sun , Lei Zhang , Tao Du
Exploring measures for low-energy consumption, low-CO2 emission, and high-economic benefit in the iron and steel industry is gaining increasing attention. This study innovatively establishes a holistic approach that integrates energy consumption, CO2 emission and economic benefit to optimize a typical steel mill. After optimization, the energy-benefit indicator has increased from 2.07 CNY/kgce to 2.83 CNY/kgce, with economic benefit improving by 97.58 CNY/t, energy consumption decreasing by 108.61 kgce/t, and CO2 emission reducing by 539.03 kg/t. Furthermore, this study scrutinizes the influence of energy structure, material structure, process parameter, and price on the energy-benefit indicator. Taking energy structure as an example, each additional 50 kg of pulverized coal injection will correspondingly improve the system's energy-benefit indicator by 0.02 CNY/kgce. These findings provide valuable insights into enhancing sustainability in the iron and steel industry, offering practical strategies for optimizing energy efficiency, reducing CO2 emissions, and achieving economic benefits.
在钢铁行业探索低能耗、低二氧化碳排放和高经济效益的措施越来越受到关注。本研究创新性地建立了一种整合能耗、二氧化碳排放和经济效益的整体方法,对典型钢厂进行优化。优化后,能效指标从 2.07 元/kgce 提高到 2.83 元/kgce,经济效益提高 97.58 元/t,能耗降低 108.61 kgce/t,二氧化碳排放减少 539.03 kg/t。此外,本研究还探讨了能源结构、材料结构、工艺参数和价格对能源效益指标的影响。以能源结构为例,每增加 50 kg 煤粉喷射量,系统的能源效益指标将相应提高 0.02 元人民币/kgce。这些研究结果为提高钢铁行业的可持续发展提供了宝贵的见解,为优化能源效率、减少二氧化碳排放和实现经济效益提供了切实可行的策略。
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引用次数: 0
The computer does not always do it better! The effect of computer-automated reward calculations on consumer satisfaction with digital incentives for low-carbon behavior 电脑并不总是做得更好!计算机自动奖励计算对消费者低碳行为数字激励满意度的影响
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-31 DOI: 10.1016/j.resconrec.2024.107991
Xin Jiang , Zhihua Ding , Yupeng Mou , Yue Liu , Manqiong Shen
Digital incentive tools encourage participants by recording and rewarding their daily low-carbon behavior on digital platforms, ultimately fostering a low-carbon lifestyle. This research explores the contextual factor affecting the effectiveness of rewards in digital incentive tools, specifically the impact of computer-automated calculation design (vs. self-calculation design) on satisfaction towards rewards. Through four controlled experiments focused on green commuting with American samples and one field experiment on clothing recycling with a Chinese sample, this research finds when participants notified of rewards, the computer-automated calculation design (vs. self-calculation design) reduces their satisfaction towards rewards. That is, when participants notified of potential rewards, presented computer-calculated outcomes automatically (rather than allowed to self-calculate their own rewards) would diminish their satisfaction towards rewards. This effect is mediated by the reduced salience of reward elements rather than decreased self-involvement. Furthermore, listing reward components can alleviate this negative impact. This research enhances the literature on extrinsic rewards and low-carbon behavior by identifying the design of automated reward calculations as a novel factor undermining reward effectiveness, and recommending practitioners to enhance participants' perception of elements constituting the rewards.
数字激励工具通过在数字平台上记录和奖励参与者的日常低碳行为来鼓励他们,最终促进低碳生活方式的形成。本研究探讨了影响数字激励工具中奖励效果的环境因素,特别是计算机自动计算设计(相对于自我计算设计)对奖励满意度的影响。通过四个以美国样本为对象的绿色通勤对照实验和一个以中国样本为对象的衣物回收实地实验,本研究发现,当参与者收到奖励通知时,计算机自动计算设计(与自我计算设计相比)会降低他们对奖励的满意度。也就是说,当参与者收到潜在奖励通知时,计算机自动计算的结果(而不是让他们自己计算奖励)会降低他们对奖励的满意度。这种效应是由奖励元素的显著性降低而非自我参与度降低所促成的。此外,列出奖励要素可以减轻这种负面影响。这项研究将自动奖励计算的设计视为削弱奖励有效性的一个新因素,并建议实践者增强参与者对奖励构成要素的感知,从而丰富了有关外在奖励和低碳行为的文献。
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引用次数: 0
The potential of Deposit Refund Systems in closing the plastic beverage bottle loop: A review 押金退还制度在关闭塑料饮料瓶循环方面的潜力:综述
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-30 DOI: 10.1016/j.resconrec.2024.107962
Caterina Picuno , Spyridoula Gerassimidou , Weimu You , Olwenn Martin , Eleni Iacovidou
This critical review assesses the implementation and impact of Deposit Return Schemes (DRSs), also referred to as ‘Deposit Refund Systems’ and ‘Deposit Return Systems’ in international contexts, focusing on plastic beverage bottles. The review explores the multi-dimensional challenges that shape effective DRS implementation. A total of 143 peer-reviewed articles and grey literature studies were analysed based on DRS definitions, scope, year of implementation, materials involved, and impacts across multiple dimensions (technical, social, economic, regulatory, and environmental). Emphasising Europe, the study outlines the multi-dimensional challenges and opportunities associated with DRSs. Key findings highlight the critical importance of balancing redemption locations, deposit values, and public awareness, as reflected in varying return rates in different countries. While industry stakeholders advocate for standardising DRS models to maximise economic and technical value in the plastic bottle value chain, significant European-wide and regional-specific challenges such as harmonizing legal requirements, potential trade-offs, and addressing environmental and transportation costs, persist. This underscores the ongoing need for evaluation and refinement of DRS implementation strategies within evolving waste management practices. As the first of its kind, this study underscores the necessity for future research to inform the sustainability assessment of DRS, policy development, and efforts to promote social accountability.
本评论以塑料饮料瓶为重点,评估了押金退还计划(DRSs)(在国际上也称为 "押金退款制度 "和 "押金退还制度")的实施情况和影响。综述探讨了影响有效实施 DRS 的多方面挑战。根据 DRS 的定义、范围、实施年份、涉及的材料以及对多个方面(技术、社会、经济、监管和环境)的影响,共分析了 143 篇经同行评审的文章和灰色文献研究。本研究以欧洲为重点,概述了与 DRS 相关的多维挑战和机遇。主要研究结果强调了平衡兑换地点、押金价值和公众意识的重要性,这反映在不同国家不同的返还率上。虽然行业利益相关者主张对 DRS 模式进行标准化,以最大限度地提高塑料瓶价值链中的经济和技术价值,但全欧洲和特定地区仍然面临着重大挑战,如统一法律要求、潜在的权衡以及解决环境和运输成本问题。这凸显了在不断发展的废物管理实践中评估和完善 DRS 实施战略的持续必要性。作为同类研究中的第一项,本研究强调了未来研究的必要性,以便为 DRS 的可持续性评估、政策制定和促进社会问责制的努力提供信息。
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引用次数: 0
Where coal is produced really matters the environmental impacts 煤炭产地对环境影响的真正影响
IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-28 DOI: 10.1016/j.resconrec.2024.107987
You Zhang , Xuewei Liu , Laure Patouillard , Manuele Margni , Cécile Bulle , Zengwei Yuan
China is the largest coal producer. The environmental impacts caused by its vast production deserve attention. Previous site-generic life cycle assessment (LCA) studies focused on single or several coal mines, ignoring spatial heterogeneity of environmental impacts and hardly providing industry-level suggestions. Here, we propose a technical framework for regionalized LCA and evaluate provincial-level environmental impacts per tonne of coal in China. It reveals significant variations in climate change and particulate matter formation potential (PMFP), with water scarcity potential (WSP) showing the highest spatial disparities, and also demonstrates the significance of this work. Key processes dominating environmental impacts and underlying factors driving these variations are identified. Furthermore, the total PMFP and WSP of provincial-level coal production since 2002 are estimated, showing a growing trend in spatial variation. This study provides valuable insights to enhance the environmental performance of China's coal industry and serves as a methodological reference for regionalized LCA research.
中国是最大的煤炭生产国。巨大的煤炭产量对环境造成的影响值得关注。以往的地点通用生命周期评估(LCA)研究主要针对单个或多个煤矿,忽略了环境影响的空间异质性,也很难提供行业层面的建议。在此,我们提出了一个区域化生命周期评估的技术框架,并对中国每吨煤的省级环境影响进行了评估。它揭示了气候变化和颗粒物形成潜势(PMFP)的显著差异,其中缺水潜势(WSP)的空间差异最大,同时也证明了这项工作的意义。确定了主导环境影响的关键过程和驱动这些变化的潜在因素。此外,还估算了自 2002 年以来省级煤炭生产的 PMFP 和 WSP 总量,结果显示空间差异呈增长趋势。这项研究为提高中国煤炭工业的环境绩效提供了有价值的见解,并为区域化生命周期评估研究提供了方法参考。
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引用次数: 0
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Resources Conservation and Recycling
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