Article
Green & Sustainable Science & Technology
Benrong Zheng, Kun Wen, Liang Jin, Xianpei Hong
Summary: This paper investigates two recycling cooperation modes, the recycling alliance mode and cost sharing mode, in a closed-loop supply chain. The optimal choice of recycling cooperation depends on the remanufacturing efficiency and the relative recycling cost efficiency of the manufacturer and retailer. The analysis shows that both recycling modes can lead to improvements for the manufacturer and retailer, with the retailer preferring the cost-sharing mode.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2022)
Article
Economics
Yongyi Zhou, Yulin Zhang, M. I. M. Wahab, Mark Goh
Summary: This study investigates channel leadership and performance in a closed-loop supply chain involving competition among an electric vehicle manufacturer, an electric vehicle recycler, and a third-party recycler. A game-theoretic model is developed to obtain equilibrium outcomes for the recycling channels and examine the impact of competition. The study finds difficulties in aligning preferences for recycling leadership mode, emphasizing the need for technological advancements and governmental intervention. It highlights the importance of environmental responsibility awareness, environmental damage, and social welfare.
TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW
(2023)
Article
Computer Science, Interdisciplinary Applications
Christian N. Samuel, Claver Diallo, Uday Venkatadri, Sima Ghayebloo
Summary: This paper proposes an integrated model for the design of a multi-component multi-product closed-loop supply chain, considering economies of scale for processing centers, transshipment of inspected products, and reliability of returned products. The study shows that when products or parts have high reliability, the Inspection, Refurbishment and Disassembly centre capacity can be lower, but when reliability is low, greater capacity is required. In the latter case, economies of scale play a role and transshipment between centers is necessary.
COMPUTERS & INDUSTRIAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Behrooz Khorshidvand, Adel Guitouni, Kannan Govindan, Hamed Soleimani
Summary: In recent years, there has been increasing attention on the design of closed-loop supply chains. This study aims to examine a multi-level, dual-channel green closed-loop supply chain that integrates circular economy principles. By determining optimal equilibrium prices, greening levels, and advertising strategies, the study finds that a collaborative approach surpasses a decentralized one regarding sustainability and profitability across the supply chain. The study also highlights the trade-offs between centralization and decentralization, as well as the importance of targeted advertising and incentivizing circular economy practices through collaboration for positive environmental and economic outcomes.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Automation & Control Systems
Nana Wan
Summary: This paper develops a closed-loop supply chain with a manufacturer and a retailer, which adopts either a retail channel or a dual-channel sales mode for product selling and a manufacturer, retailer, or hybrid recycling mode for used product collection. Six game theory models are formulated to determine the optimal pricing and recycling rate decisions based on different sales and recycling modes. The paper explores the strategies for selecting optimal sales and recycling modes through model comparisons and numerical analysis. The findings reveal that customers, the environment, and the manufacturer generally prefer the dual-channel sales mode. However, the retailer's preference for the dual-channel (retail channel) sales mode depends on the discount coefficient of demand. Additionally, customers, the environment, and the manufacturer favor the hybrid (retailer) recycling mode when the competition intensity for recycling is relatively low (high). However, the retailer's choice of recycling mode varies depending on the type of supply chain.
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Victor Suhandi, Ping -Shun Chen
Summary: The closed-loop supply chain inventory model is crucial in the pharmaceutical industry as it promotes environmental, social, and economic sustainability. Unused drugs damage the environment while some patients struggle to access expensive prescription drugs. By applying the principles of the circular economy, the closed-loop supply chain can recycle unused drugs and reduce waste. This study focuses on the impact of government incentives on patient demand for recycled drugs and pharmacies' inventory decisions to achieve economic sustainability.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Zeyou Hu, Fan Hu, Lifeng Deng, Yumin Yang, Qiujian Xie, Zhu Gao, Chunyue Pan, Yinghua Jin, Juntao Tang, Guipeng Yu, Wei Zhang
Summary: In this work, a triketoenamine based dynamic covalent network was developed, which allows for easy construction of highly crosslinked and chemically reprocessable networks. The resulting polymer monoliths have high mechanical properties and can be recycled through aqueous solution-mediated monomer-network-monomer cycling. Furthermore, a catalyst-free and low-temperature reprogrammable covalent adaptable network was achieved. This design concept can be applied to the development of other novel vitrimers with high repressibility and recyclability, and contributes to the future design of sustainable polymers with minimal environmental impact.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Yanting Huang, Yuqing Liang
Summary: This study investigates the impact of online and offline dual recycling channels in a closed-loop supply chain, and how government subsidies affect pricing decisions and recycling mode selection of channel members. Findings show that in dual recycling modes, remanufacturers can maximize profits by setting appropriate recycling and transfer prices, while collectors prefer single offline recycling due to competitive threats from online recycling. The relationship between collection quantities in the three modes depends on consumer preferences for the online recycling channel. Additionally, government subsidies play a positive role in promoting recycling and remanufacturing willingness of remanufacturers and collectors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Multidisciplinary
Benrong Zheng, Jie Chu, Liang Jin
Summary: This study examines the reverse channel choice for manufacturers and coordination mechanisms in CLSCs amidst dual competitive sales channels. It is found that manufacturers and retailers can maximize profits through different recycling channel structures, and a simple price contract with profit sharing can help coordinate dual-channel CLSCs effectively.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Construction & Building Technology
Saeed Beheshti, Jafar Heydari, Zeinab Sazvar
Summary: This study addresses the food waste problem in urban areas by optimizing the recycling channel in reverse logistics and closed-loop supply chains. A novel Quantity Flexibility (QF) contract is proposed to coordinate the channel, and its effectiveness is validated through a real case study, showing significant improvement in supply chain profitability.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Environmental Sciences
Meihong Zhu, Xiao Li, Junhai Ma, Tiantong Xu, Liqing Zhu
Summary: This study focuses on a closed-loop supply chain model, exploring member recycling behaviors and methods, and analyzing system stability and parameter impacts through numerical simulation. Findings suggest that manufacturers' decision speed significantly affects model stability, advocating for stable pricing strategies to avoid chaotic price wars, and increased investment in recycling technology innovation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Tingzhou Yang, Dan Luo, Aiping Yu, Zhongwei Chen
Summary: The rapid spread of electric vehicles with lithium-ion batteries (LIBs) poses significant challenges and environmental risks for recyclers in managing waste and after scrap. Closed-loop recycling plays a crucial role in sustaining battery development and mitigating raw material shortages and supply chain risks. This article outlines and evaluates current methods for direct cathode regeneration in industrialized recycling, summarizes different regeneration methods for spent cathode materials, providing a new perspective for closed-loop recycling of LIBs. A proposed reference recycling route for retrofitting existing cathode production lines minimizes costs. In addition to promoting the industrialization of direct cathode recycling, the article also emphasizes the environmental, economic, and political benefits of battery recycling.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Leyla Ozgur Polat, Askiner Gungor
Summary: This study proposes a mixed integer programming model for decision-makers to manage their activities on the WEEE closed-loop supply chain network, integrating product returns with different quality and damage levels. The results indicate that the capacity balance among stores, producers, and recovery centers is vital to make the network profitable and sustainable.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Elham Kamyabi, Hashem Moazzez, Ali Husseinzadeh Kashan
Summary: In this study, the optimization of a lead-acid battery closed-loop supply chain (CLSC) is investigated using a combination of System Dynamics (SD) and mathematical programming. The results highlight the significance of financial flows such as trade and bank credits in decision-making processes, and the impact of limited recycling capacity on the shortage of recycled lead supply.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Chemistry, Multidisciplinary
Keita Saito, Tankut Turel, Fabian Eisenreich, Zeljko Tomovic
Summary: Chemical recycling provides a promising solution for the treatment of end-of-life synthetic polymers, allowing the efficient recovery and convenient separation of important reusable materials at the molecular level. By developing vanillin-based polymer networks with dual-cleavable imine and acetal bonds, the efficient recycling of thermosets and the isolation of high-purity reusable materials have been achieved.
Article
Engineering, Environmental
Yui Kawasaki, Sayaka Nagao-Sato, Misa Shimpo, Kahori Fujisaki, Emi Yoshii, Rie Akamatsu, Petra Warschburger
Summary: This study qualitatively describes sustainable dietary behaviors (SDBs) that Japanese and German adults can implement in their lives, and quantitatively compares the similarities and differences in understanding SDBs between the two samples. The study found that Japanese participants were more focused on food waste prevention, while German participants were more focused on solving environmental problems.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kechun Chen, Yuan Ding, Liming Yang, Zhihao Wang, Haoxuan Yu, Difan Fang, Yufa Feng, Liying Hu, Chenxi Xu, Penghui Shao, Xubiao Luo, Liang Chen
Summary: This study proposes a targeted repair scheme for the recovery of graphite anodes from spent LIBs by systematically characterizing and analyzing the structure and composition of spent graphite (SG). The results show that the repair scheme achieves effective SG repair and the repaired graphite anode displays excellent lithium storage performance.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Takao Ueda, Shigeki Koyanaka, Tatsuya Oki
Summary: Fires caused by accidental crushing of batteries are a serious issue in the e-waste recycling process. A new in-line sorting system that uses X-ray scanning and deep learning has been developed to accurately detect batteries. Through a validation study, the system achieved higher accuracy compared to other existing programs.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Hannes Geist, Frank Balle
Summary: Research on circular economy often lacks empirical data, especially in the theory of circular process design and design for remanufacturing. This study systematically collected and analyzed engineering data on seven remanufacturing processes in the European automotive remanufacturing industry for the first time, providing empirical support for circular engineering challenges, potentials, and solutions.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Xiaojing Li, Fan Lue, Nanlin Liao, Hua Zhang, Na Yang, Pinjing He
Summary: This study assesses and predicts the greenhouse gas emissions on the timeline as waste treatment technologies develop in Shanghai from 1991 to 2025 using the Life Cycle Assessment (LCA) methodology. The findings demonstrate that GHG emission has reached net-zero in 2019 owing to the application of alternative technologies and waste segregation.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Bingchun Liu, Haoyang Wang, Xiaoqin Liang, Yibo Wang, Zijie Feng
Summary: The expansion of the photovoltaic market has resulted in a significant increase in PV waste. Therefore, conducting scientific research to determine the importance of the circular economy for sustainable growth in the PV industry is essential. The study demonstrates that accurate prediction of PV installed capacity and quantifying the importance of recycling in balancing the supply and demand of raw materials can be achieved through a multi-factor installed capacity prediction model and recovery potential prediction.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Review
Engineering, Environmental
Chuanzhen Zhang, Baojing Gu, Xia Liang, Shu Kee Lam, Yi Zhou, Deli Chen
Summary: Reactive nitrogen is crucial for agriculture and human nutrition, but mismanagement can have detrimental effects on human health and ecosystem services, hindering the achievement of the 2030 Sustainable Development Goals. Progress towards nitrogen-related targets varies across countries, highlighting the need for integrated management to achieve overall synergies.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Alessandro Gatto, Marijke Kuiper, Corina van Middelaar, Hans van Meijl
Summary: This study examines the economic and environmental effects of transitioning towards more circular food systems in the European Union (EU27) by feeding animals with low-opportunity-cost feed and better utilizing local feed resources. The results show that providing subsidies for circularity and promoting the use of low-cost feed can increase animal production, but also have negative impacts on land use and emissions. On the other hand, promoting domestic feed sourcing through import tariffs can decrease animal production and greenhouse gas emissions in agriculture. However, complementary policies are needed to mitigate drawbacks and enhance benefits of a more circular agri-food system.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Jinbo Zhang, Liu Chen, Yulei Xie, Pingjian Yang, Zheng Li, Huaicheng Guo, Yang Zhang, Lirong Liu
Summary: This study examines the impact of carbon taxes on low-carbon development and climate change mitigation. By constructing a cross-system bi-layer model, the study finds that reasonable carbon taxes can promote the stability of the energy network, reduce carbon emissions and air pollutants, and optimize production efficiency and the structure of the energy system. This study contributes to a better understanding of the effects and implementation pathways of carbon taxes.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Konstantin Born, Mehmet Metehan Ciftci
Summary: Increasing recycling of metals is important for reducing reliance on mining, but it cannot fully meet future metal demand. Primary production of metals is expected to continue rising, highlighting the need for alternative circular economy strategies such as demand reduction and mitigating harmful impacts of primary metal production.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Yinqiu Ma, Lin Huang, Jiahui Li, Wei Cao, Yumei Cai
Summary: Afforestation and reforestation, such as China's Grain for Green Program, have shown to effectively mitigate greenhouse gas emissions and contribute to carbon sink capacity. This study highlights the significant carbon potential of the program and its potential application in other countries to reduce CO2 in the atmosphere.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Arlind Dervishaj, Kjartan Gudmundsson
Summary: This paper reviews digital tools for supporting the Circular Economy (CE) in the built environment and provides suggestions. The study identifies limitations in the functionalities of current tools, including a lack of representative data for LCA and underdeveloped circularity indicators. Further development is needed in terms of interoperability aspects, integration of more sources of data for LCA and circularity, and possibilities for a comprehensive evaluation of design choices.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Mohamadreza Y. Azarfam, Anuj Maheshwari, Frank D. Blum, Siddhesh Chaudhari, Clinton Switzer, Ranji Vaidyanathan, Jay C. Hanan, Sudheer Bandla
Summary: This study introduces a feasible method for manufacturing recycled composites using post-consumer carpets and recycled resin. The resulting composites have impressive strength and modulus, surpassing commercial thermoplastics and making them suitable for structural applications. This research presents a promising approach to address carpet landfilling and reduce reliance on additives.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Pujiang Shi, Tianle Huang, Hong Kit Lim, Chiew Kei Tan, Jong-Min Lee, Chor Yong Tay
Summary: This study developed a highly porous bioadaptive 3D sponge-like construct from plastic materials in discarded keyboards for advanced in vitro applications. The findings demonstrate the potential of using discarded keyboards as a waste-to-resource feedstock to achieve waste reduction and maximize value-capture.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kuo-Jui Wu, Hailing Qiu, Caiyan Huang, Anthony S. F. Chiu, Ming-Lang Tseng
Summary: Government resource allocation practices for achieving carbon neutrality should be guided by dynamic system theory to identify potential dynamics. Carbon intensity control dynamics have a significant influence on other dynamics.
RESOURCES CONSERVATION AND RECYCLING
(2024)
