Resources Conservation and Recycling最新文献

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Substance flow analysis of polyethylene terephthalate (PET) fiber in China 中国聚对苯二甲酸乙二酯（PET）纤维的物质流分析

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-28 DOI: 10.1016/j.resconrec.2024.107984

Jun Ning , Shoujuan Tang , Yingjie Fu , Guangxin Liu , Yuheng Sun , Zhengyuan Feng , Donggen Huang , Lei Shi

The flow process of polyethylene terephthalate (PET) fibers presents complex characteristics that are challenging to quantify accurately. This study quantified the flow patterns of PET fiber production, consumption, trade, and recycling during 1990–2022 and analyzed the effects of the economy, technology, and policy on the metabolic processes of PET fiber. Key findings are as follows: (1) the consumption and export of PET fiber showed an exponential growth trend due to rapid economic growth, accession to WTO, and technological progress since 2001; (2) the production of PET fiber decreased slightly during 2016–2018, affected by high-quality transformation of industry and the elimination of backward production capacity policies; (3) the increases in recycled PET fiber input after 2019, due to carbon peak, carbon neutral, and circular economy policies, have affected the formation of a new pattern of PET flow and resulted in new opportunities and challenges for the development of PET industry.

聚对苯二甲酸乙二醇酯（PET）纤维的流动过程呈现出复杂的特征，难以准确量化。本研究量化了 1990-2022 年间 PET 纤维生产、消费、贸易和回收的流动模式，并分析了经济、技术和政策对 PET 纤维新陈代谢过程的影响。主要结论如下(1）2001年以来，受经济快速增长、加入WTO、技术进步等因素影响，PET纤维的消费和出口呈现指数级增长趋势；（2）2016-2018年，受产业高质量转型和淘汰落后产能政策影响，PET纤维产量略有下降；（3）2019年以后，受碳峰值、碳中和、循环经济等政策影响，再生PET纤维投入增加，影响PET流动新格局的形成，为PET产业发展带来新的机遇和挑战。

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引用次数: 0

Production and separation of knitted lyocell-cellulose acetate fabrics from crimped cellulose acetate fibers 用卷曲的醋酸纤维素纤维生产和分离莱赛尔-醋酸纤维素针织物

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-28 DOI: 10.1016/j.resconrec.2024.107959

Florian Wurm , Florence Schöb , Tina Moor , Julia Schweiß , Jörg Leukel , Tung Pham , Thomas Bechtold

Cellulose acetate (CA) can serve as bio-favourable polyethylene terephthalate (PET) substitute in textiles, being biodegradable and mechanically disintegrable. Textile fiber production was hypothesised possible using filter tow production facilities. Different crimped CA fibers from a filter tow machine were used to produce mixed Lyocell-CA yarns via ring spinning. Yarn production, fiber-specific dyeing and subsequent material separation (recovery of 88 %) was possible by standard processes. Yarns of a 50:50 %w/w have a titer of ∼46 tex (≙ g/1000 m) and a tenacity of ∼0.1 N/tex. The yarns show increasing tenacity with increasing lyocell content (∼0.2 N/tex for 100 % Lyocell). Furthermore, CA was separated from dispersion dye using acetone-ethanol mixtures (1:2 v/v). Though ameliorating CA fiber spinning is required for pure CA yarn production, this process is implantable on existing machinery in common machine settings. Textile CA fibers can be produced by filter tow infrastructure. CA can help reducing the atmosphere's fossil-carbon enrichment.

醋酸纤维素（CA）可作为纺织品中的聚对苯二甲酸乙二醇酯（PET）替代品，具有生物降解性和机械分解性。纺织纤维的生产假设可以使用过滤巾生产设备。通过环锭纺纱，使用来自滤丝束机的不同卷曲 CA 纤维生产混合 Lyocell-CA 纱线。纱线生产、纤维染色和随后的材料分离（回收率为 88%）均采用标准工艺。50:50 %w/w 的纱线的滴度为∼46 tex（≙ g/1000 m），韧性为∼0.1 N/tex。纱线的韧性随着莱赛尔含量的增加而增加（100% 莱赛尔的韧性为 0.2 N/tex）。此外，还使用丙酮-乙醇混合物（1:2 v/v）将 CA 从分散染料中分离出来。虽然纯 CA 纱线的生产需要改进 CA 纤维的纺丝，但这一工艺可在现有机器上以普通机器设置进行植入。纺织用 CA 纤维可通过过滤丝束基础设施生产。CA 可以帮助减少大气中化石碳的富集。

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引用次数: 0

Durability assessment of alkyl ketene dimer hydrophobic treatment of bio-based thermal insulation materials 生物基隔热材料的烷基酮二聚体疏水处理耐久性评估

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-28 DOI: 10.1016/j.resconrec.2024.107983

Helong Song , Koh Chuen Hon , Florent Gauvin , Samuel Pantaleo , Felix Berger , Wei Chen , H.J.H. Brouwers

Bio-based composites are increasingly used as thermal insulation materials in construction due to sustainability and low thermal conductivity. However, their high moisture absorption can negatively affect performance and mould growth risk, shortening product lifespan. This study introduces alkyl ketene dimer (AKD) as an eco-friendly and economical solution for the hydrophobic treatment of two bio-based composites, mycelium and grass, to enhance their durability. We compare the physicochemical properties, hygrothermal performance, and mould growth resistance of bio-based composites before and after hydrophobic modification while evaluating their durability in simulated building envelopes across different climates. Results showed that the modified bio-based composites were well-grafted with AKD. The water absorption of bio-based composites significantly decreased after modification, and the mould growth resistance capacity of modified composites was significantly improved. Moreover, hygrothermal simulations reveal that AKD modification effectively enhances their suitability under different climate profiles, particularly when modified grass composites are applied.

生物基复合材料因其可持续性和低导热性，越来越多地被用作建筑中的隔热材料。然而，生物基复合材料的高吸湿性会对其性能产生负面影响，并存在霉菌生长的风险，从而缩短产品的使用寿命。本研究采用烷基酮二聚体（AKD）作为一种环保、经济的解决方案，对菌丝和草这两种生物基复合材料进行疏水处理，以提高它们的耐久性。我们比较了疏水改性前后生物基复合材料的物理化学特性、湿热性能和抗霉菌生长性能，同时评估了它们在不同气候条件下模拟建筑围护结构中的耐久性。结果表明，改性后的生物基复合材料与 AKD 接枝良好。改性后，生物基复合材料的吸水性明显降低，抗霉菌生长能力显著提高。此外，湿热模拟显示，AKD 改性可有效提高其在不同气候条件下的适用性，尤其是在应用改性草复合材料时。

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引用次数: 0

How to improve supply chain sustainable performance by resilience practices through dynamic capability view: Evidence from Chinese construction 如何通过动态能力视角的复原力实践提高供应链的可持续绩效：来自中国建筑业的证据

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-25 DOI: 10.1016/j.resconrec.2024.107965

Kexing Li , Mahdi Bashiri , Ming K Lim , Tega Akpobi

This study explores the relationship between supply chain resilience (SCR) and sustainable supply chain performance (SSCP) within the context of the Chinese construction industry, a sector known for its complexity and vulnerability to disruptions. Drawing on data from 525 construction companies, the research investigates how SCR directly influences SSCP and examines the mediating role of dynamic capabilities in this relationship. The results highlight those dynamic capabilities, specifically the ability to seize and reconfigure, serve as critical mediators in the resilience-sustainability relationship while sensing does not have a significant mediating effect. This suggests that in highly dynamic environments like China's construction sector, focusing on capturing opportunities and reconfiguring resources is more effective for achieving sustainable outcomes than relying solely on sensing capabilities. This finding contributes to the growing body of knowledge by providing a nuanced understanding of how resilience practices can be leveraged to promote long-term sustainability.

中国建筑业以其复杂性和易受干扰性著称，本研究以中国建筑业为背景，探讨了供应链弹性（SCR）与可持续供应链绩效（SSCP）之间的关系。研究利用来自 525 家建筑公司的数据，调查了 SCR 如何直接影响 SSCP，并研究了动态能力在这种关系中的中介作用。研究结果表明，动态能力，特别是把握和重新配置的能力，是复原力与可持续性关系中的关键中介，而感知能力并没有显著的中介作用。这表明，在中国建筑业这样高度动态的环境中，专注于捕捉机遇和重新配置资源比单纯依赖感知能力更能有效实现可持续发展。这一发现提供了对如何利用复原力实践促进长期可持续发展的细致入微的理解，为不断增长的知识体系做出了贡献。

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引用次数: 0

Property modification of rigid polyurethane foam by end-of-life polyvinyl chloride foam particles 用报废聚氯乙烯泡沫颗粒改变硬质聚氨酯泡沫的性能

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-23 DOI: 10.1016/j.resconrec.2024.107982

H. Mahmood , A. Zippo , G. Iarriccio , M. Renon , A. Pegoretti

End-of-life (EoL) rigid crosslinked polyvinyl chloride (PVC) foams are subjected to hazardous procedure of incineration or landfilling for waste management. This work aims to valorize PVC waste for the property variation of rigid polyurethane (PU) foam. PVC waste was sieved to obtain different sized particles and were mixed homogenously in polyol/isocyanate mixture. The geometrical density of modified foams increased with the progressive addition of the PVC particles, the effect of which was more pronounced with 300 μm PVC particles. Morphological analysis of these foams revealed a reduction in cell size and an increase in the open porosity of the PU cell structure. Moreover, PU foams loaded with PVC particles did not manifest a severe reduction of the former's insulating property. The effect of damping in PU foams was also verified by resonance tests where a size effect was observed, increasing the damping ratio and thus enhancing the usefulness of such insulating structures.

报废（EoL）硬质交联聚氯乙烯（PVC）泡沫塑料在废物管理中需要经过焚烧或填埋等危险程序。这项工作旨在利用聚氯乙烯废料来改变硬质聚氨酯（PU）泡沫的性能。聚氯乙烯废料经筛分后得到不同大小的颗粒，并与多元醇/异氰酸酯混合物均匀混合。改性泡沫的几何密度随着聚氯乙烯颗粒的逐渐添加而增加，其中 300 μm 聚氯乙烯颗粒的效果更为明显。这些泡沫的形态分析表明，聚氨酯细胞结构的细胞尺寸减小，开放孔隙率增加。此外，添加了聚氯乙烯颗粒的聚氨酯泡沫的绝缘性能并没有明显下降。聚氨酯泡沫的阻尼效应也通过共振测试得到了验证，在共振测试中观察到了尺寸效应，阻尼比增加，从而提高了这种绝缘结构的实用性。

引用次数: 0

Conservation effects of transboundary protected areas on mitigating anthropogenic pressure across China's borders 跨境保护区对缓解中国边境人为压力的保护作用

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-22 DOI: 10.1016/j.resconrec.2024.107976

Li An , Lei Shen , Shuai Zhong , Delong Li , Yidong Zhu

The escalating anthropogenic pressure in terrestrial borderlands is one of the major threats to transboundary ecosystems. To realize effective transboundary conservation efforts, neighboring countries need to clarify the spatial patterns and variation trends of anthropogenic pressure, as well as effects of the transboundary protected area (TBPA) on resisting anthropogenic pressure. This study investigated TBPAs across China's borders with diversified socioeconomic and natural backgrounds based on nighttime light, population density, impervious surface data and causal inference methods. We found both TBPAs and surrounding unprotected areas experienced significant increase of anthropogenic pressure, and the proportion of very high pressure in TBPAs expanded from 0.43 % in 2000 to 1.19 % in 2020. TBPAs effectively mitigated the growth trend of anthropogenic pressure by 23.91 %, however there's discrepancy in conservation effects among different TBPAs and countries. These results highlight the necessity to enhance international collaboration to address anthropogenic pressure and promote sustainable livelihoods in transboundary areas.

陆地边境地区不断升级的人为压力是跨境生态系统面临的主要威胁之一。为了实现有效的跨境保护，周边国家需要明确人为压力的空间格局和变化趋势，以及跨境保护区（TBPA）对抵御人为压力的影响。本研究基于夜间光照、人口密度、不透水地表数据和因果推断方法，调查了具有不同社会经济和自然背景的中国跨境 TBPA。我们发现，特变电工保护区和周边非保护区都经历了人为压力的显著增加，特变电工保护区的极高压力比例从 2000 年的 0.43% 增加到 2020 年的 1.19%。TBPA有效缓解了23.91%的人为压力增长趋势，但不同TBPA和不同国家的保护效果存在差异。这些结果凸显了加强国际合作以应对人为压力和促进跨境地区可持续生计的必要性。

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引用次数: 0

Assessing the environmental impacts associated with China's battery minerals and technologies 评估中国电池矿产和技术对环境的影响

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-21 DOI: 10.1016/j.resconrec.2024.107978

Yawei Huang , Heming Wang , Asaf Tzachor

Battery mineral production causes impacts on the environment and human health, which may increase the probability of supply restrictions imposed by exporting countries. As the largest battery producer, assessing the environmental impacts of China's battery-related minerals and technologies is crucial. However, studies that address the integrated issues of supply risks, vulnerability, and environmental impacts are relatively scarce for China. This study assesses China's battery materials and technologies’ environmental impacts. Results show that particulate pollution from nickel, cobalt, and manganese production exceeds CO₂ emissions, whereas the reverse is true for other battery materials. Battery technologies that involve nickel, cobalt, and manganese are predominantly affected by particulate pollution, causing over 62 % of human health damage. Each battery technology disproportionately affects the environment through a single element, with contribution values exceeding 46 %. In response, the study proposes strategies for a sustainable battery industry, including green energy systems, tailings backfilling, and circular economy measures.

电池矿物生产会对环境和人类健康造成影响，这可能会增加出口国实施供应限制的可能性。作为最大的电池生产国，评估中国电池相关矿物和技术对环境的影响至关重要。然而，针对中国的供应风险、脆弱性和环境影响等综合问题的研究相对较少。本研究评估了中国电池材料和技术对环境的影响。结果表明，镍、钴和锰生产过程中产生的颗粒物污染超过了二氧化碳排放量，而其他电池材料的情况恰恰相反。涉及镍、钴和锰的电池技术主要受到微粒污染的影响，对人类健康造成的损害超过 62%。每种电池技术都会通过单一元素对环境造成不成比例的影响，影响值超过 46%。为此，研究提出了可持续电池工业战略，包括绿色能源系统、尾矿回填和循环经济措施。

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引用次数: 0

Estimating carbon emission reductions from China's “Zero-waste City” construction pilot program 估算中国 "零废弃城市 "建设试点项目的碳减排量

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-21 DOI: 10.1016/j.resconrec.2024.107975

Chao Tian , Haiqing Sui , Youlin Chen , Wenxi Wang , Huijing Deng

Zero-waste strategies aim to reduce the growing generation of all types of solid waste streams. China has launched a “Zero-waste City” construction pilot program to mitigate pollution, lower carbon emissions, and promote a circular economy. However, a knowledge gap remains in terms of quantifying the carbon emission reduction performance when this program was implemented in the pilot cities. This study developed a methodology to account for the carbon emission reductions from the solid waste management processes, including source control, mid-end utilization, and end-of-line disposal in China's zero-waste pilot cities. Results indicated that the intensity of solid waste generation has been effectively controlled, the utilization level has been significantly improved, and the capacity for harmless disposal has been greatly enhanced, leading to substantial carbon emission reductions and climate benefits. Further decomposition of the driving forces using the Logarithmic Mean Divisia Index (LMDI) model revealed that emission intensity and treatment structure were the primary contributors to the carbon emission reductions. These findings could provide valuable insights for advancing China's in-depth construction of “Zero-waste City” projects and inform zero-waste management strategies in other countries.

零废弃战略旨在减少日益增多的各类固体废弃物。中国已启动 "零废弃城市 "建设试点计划，以减轻污染、降低碳排放、促进循环经济。然而，在试点城市实施该计划时，在量化碳减排绩效方面仍存在知识空白。本研究开发了一种方法来核算中国零废弃试点城市固体废物管理过程中的碳减排量，包括源头控制、中端利用和末端处置。结果表明，固体废物产生强度得到有效控制，利用水平显著提高，无害化处置能力大幅提升，实现了可观的碳减排和气候惠益。利用对数平均指数（LMDI）模型对驱动力进行进一步分解后发现，排放强度和处理结构是碳减排的主要贡献因素。这些研究结果可为推进中国 "零废弃物城市 "项目的深入建设提供有价值的见解，并为其他国家的零废弃物管理战略提供参考。

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引用次数: 0

Vision-based sorting in mixed food-inorganic waste stream 基于视觉的食品-无机混合废物流分拣技术

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-19 DOI: 10.1016/j.resconrec.2024.107964

Feng Chen , Linhai Ye , Zhi Zheng , Youcai Zhao , Tao Zhou , Qifei Huang

Processing food waste is crucial for environmental conservation and resource recovery, but inadequate sorting can lead to inorganic waste mixing with food waste. The mixed waste stream reduces the efficiency of food waste treatment facilities, and the preliminary sorting relies heavily on manual labor. To address the challenge of a non-homogeneous food-inorganic waste stream, this study proposes a vision-based system for effective sorting. A real-life Mixed Food-Inorganic Waste (MFIW) dataset containing over 13,000 samples and four categories of inorganic waste was created. Based on the dataset analysis, a Waste detection model using Deformable Convolution v3 was employed, and the appropriate positioning and classification algorithm was chosen for optimal detection performance. The Waste detection model achieves an mAP⁵⁰ of 85.21 %, and the average recalls for packages, trash bags, and animal bones exceed 94 %. Additionally, the model runs at a real-time frame rate of 33.61 FPS, highlighting its suitability for industrial applications.

处理厨余垃圾对环境保护和资源回收至关重要，但分类不当会导致无机垃圾与厨余垃圾混合。混合废物流降低了泔水处理设施的效率，而且初步分拣严重依赖人工。为了应对食物无机废物流不均匀的挑战，本研究提出了一种基于视觉的有效分拣系统。研究人员创建了一个现实生活中的混合食品无机废物（MFIW）数据集，其中包含 13,000 多个样本和四类无机废物。在数据集分析的基础上，使用变形卷积 v3 建立了一个废物检测模型，并选择了适当的定位和分类算法，以获得最佳的检测性能。垃圾检测模型的 mAP50 值达到 85.21%，包裹、垃圾袋和动物骨头的平均回收率超过 94%。此外，该模型的实时帧速率为 33.61 FPS，非常适合工业应用。

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引用次数: 0

Pathways to a net zero building sector in Colombia: Insights from a circular economy perspective 哥伦比亚实现净零建筑的途径：从循环经济角度看问题

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling

Pub Date : 2024-10-19 DOI: 10.1016/j.resconrec.2024.107971

Johan Andrés Vélez-Henao, Stefan Pauliuk

The rapid urbanization and economic growth in Colombia have made the residential sector one of the largest energy and material consumers in the country. Circular economy (CE) strategies are a promising alternative to decouple the sector from resource depletion and climate change. The analysis shown here is based on the RECC model framework, a dynamic material flow analysis (dMFA) model. Our results suggest that by 2050 without CE strategies, residential building stock will reach 2.5 billion m² and emit between 13 and 25 Mt CO₂/yr, depending on whether carbon forest sequestration is included or not. A complete implementation of CE strategies and lower floor space can reduce 2020–2050 cumulative primary material production, waste generation, and GHG emissions by 48, 5, and 49 %, respectively. There is a potential to achieve net zero emissions by 2050 if, in addition to the measures mentioned above, more wood materials and forest sequestration are considered.

哥伦比亚快速的城市化和经济增长已使住宅部门成为该国最大的能源和材料消费部门之一。循环经济（CE）战略是使该行业与资源枯竭和气候变化脱钩的一种可行选择。本文的分析基于 RECC 模型框架，这是一个动态物质流分析 (dMFA) 模型。我们的分析结果表明，到 2050 年，如果不实施碳减排战略，住宅建筑面积将达到 25 亿平方米，二氧化碳排放量将介于 1300 万吨/年和 2500 万吨/年之间，具体取决于是否包括碳森林固存。全面实施 CE 战略并降低建筑面积，可使 2020-2050 年的累计初级材料生产量、废物产生量和温室气体排放量分别减少 48%、5% 和 49%。如果除上述措施外，还考虑更多的木质材料和森林固碳，到 2050 年有可能实现净零排放。

引用次数: 0

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