Circular Economy最新文献

{"title":"A framework of carbon-neutral waste transportation: Modeling and sensitive analysis","authors":"Suxiu Xu ,&nbsp;Yue Zhai ,&nbsp;Jianghong Feng ,&nbsp;Guosheng Liu","doi":"10.1016/j.cec.2023.100024","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100024","url":null,"abstract":"<div><p>This study is aimed at helping third-party logistics companies to achieve carbon neutrality, which is a challenge they will face in the near future. From the perspective of carbon neutrality, this paper studies two types of vehicle routing problems (VRP) regarding third-party logistics: One is the carbon-neutral vehicle routing problem (CNVRP), and the other is the multi-stage carbon-neutral vehicle routing problem (MSCNVRP). In this paper, we consider three objective functions for the CNVRP and MSCNVRP models respectively: total cost minimization, fleet size minimization, and carbon emission minimization. We first linearize the constructed nonlinear CNVRP and MSCNVRP models, and then verify the validity and reliability of the models through numerical examples. Numerical experimental results show that considering the total cost minimization objective leads to a better solution for fleet size and routing in transportation. In addition, in terms of the uncertainty of carbon sink price, the MSCNVRP model has more advantages than the CNVRP model. Changes in carbon sink prices and the availability of funds to achieve carbon neutrality have no effect on fleet size and vehicle routing for models whose objective functions are to minimize total costs, but models with the objective functions of minimizing fleet size or carbon emissions are more sensitive. The results also showed that companies with multiple types of vehicles have an advantage in transportation costs. In particular, the models proposed herein can provide flexible solutions for companies in third-party logistics to achieve carbon-neutral transportation.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How circular economy can reduce scope 3 carbon footprints: Lessons learned from FIFA world cup Qatar 2022","authors":"Hana Yousef Al Sholi ,&nbsp;Tadesse Wakjira ,&nbsp;Adeeb A. Kutty ,&nbsp;Sehrish Habib ,&nbsp;Muna Alfadhli ,&nbsp;Bajeela Aejas ,&nbsp;Murat Kucukvar ,&nbsp;Nuri C. Onat ,&nbsp;Doyoon Kim","doi":"10.1016/j.cec.2023.100026","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100026","url":null,"abstract":"<div><p>Mega sporting events (MSEs) such as the FIFA World Cup and the Olympics always attract people around the world to visit the hosting country, boosting its tourism and business, and leaving a positive legacy. However, such events also leave significant negative impacts on the environment such as an increase in greenhouse gas (GHG) emissions in the host and neighboring countries. Considerable research efforts have been devoted to reducing such negative impacts and maintaining the sustainability of infrastructure associated with MSEs. The infrastructure construction in the host country of an MSE is the main and inevitable source of GHG emissions. In particular, the construction work of stadiums. This study presents comprehensive research on scope-based carbon footprint analysis related to two phases, i.e., the construction phase and operation phase of stadiums, by taking the eight world cup stadiums in Qatar as a case study. A life cycle assessment is used to quantify the potential environmental impacts of these stadiums at different stages. The Ecoinvent database is used to quantify the emission factor at each phase. According to the findings, Scope 3 (indirect supply chain) emissions are greater than Scope 1 (direct on-site) emissions, and the construction supply chain is found to be a significant contributor to the carbon footprint of the stadiums, accounting for 98% of the total GHG emissions. The results also show that electricity, district cooling, and waste generation are the three top contributors of GHG emissions with 35%, 25%, and 21% emissions, respectively. Moreover, it is vital to implement innovative approaches such as circular design for end-of-life material recycling and reuse of structural components, which can support a transition toward sustainable and carbon-neutral mega events. Thus, this study presents the role of circular economy in achieving carbon-neutral FIFA World Cup Qatar 2022. This research will contribute to enhancing the future benefits of the sustainable construction of infrastructure projects for mega events and help in harmonizing mega event strategies with national circular economy targets.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of electrostatic separation to concentrate silver, aluminum, and silicon from solar panel scraps","authors":"Rodrigo A. de Souza,&nbsp;Hugo M. Veit","doi":"10.1016/j.cec.2023.100027","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100027","url":null,"abstract":"<div><p>PV modules generally contain several metals that are considered critical and/or strategic and can be recovered. They also contain harmful and toxic metals that pose a threat to the environment and human health, which makes the significance of recycling even greater. This study used mechanically processed waste Si–C (polycrystalline silicon) photovoltaic (PV) panels to obtain highly concentrated recycled metals of interest. The PV panels were comminuted and granulometrically separated before the concentration of the metals of interest could be studied in an electrostatic separator. Some parameters of the electrostatic separator were evaluated, such as the applied voltage, rotation speed of the roll, as well as distance and angle of the electrodes for better separation of the metals of interest (copper, silver, aluminum, and silicon). The results were evaluated by X-ray fluorescence analysis and the proportions of each element in the samples were compared. The results obtained showed that in the comminution and particle size separation process, the greatest mass of material (49.22%) is concentrated in the smallest particle size category, which is smaller than 0.5 mm. This particle size also has higher concentrations of silicon, silver, and aluminum. The best results with the electrostatic separator were obtained using an electric potential difference of 38 kV and a rotation speed of 75 rpm (rotation per minute), where it was possible to concentrate silicon, silver, and aluminum.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Problematising Value Retention for a Circular Economy: Dilemmas and New Value Balancing Principles","authors":"I. B. Lata, M. Wiering, S. Witjes","doi":"10.55845/tkig3907","DOIUrl":"https://doi.org/10.55845/tkig3907","url":null,"abstract":"The circular economy is a viable alternative for our current economy; while scholarly work and policy documents problematise current principles and practices, the desirable changes are often treated as fitting in natural transition pathways. Until now, the circular economy has failed to realise its transformative potential, in practice representing at best a matter of laboriously weighing different and seemingly opposite sets of values. What are the building blocks in terms of value creation and retention, and how to upscale new value-balancing practices to a system level? This contribution problematises the concept of value in a fragmented circular transition landscape by drawing on narrative-based and transdisciplinary approaches, and their potential consequences for governing the circular economy.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74558142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"You Can’t Go Circular Alone – A Stakeholder Approach to Circular Innovation","authors":"Anja Eisenreich, J. Füller","doi":"10.55845/hkke5160","DOIUrl":"https://doi.org/10.55845/hkke5160","url":null,"abstract":"Circular solutions in industrial companies strongly depend on an interlinked network of diverse stakeholders. Therefore, innovations in the field of a circular economy are difficult to achieve in traditional innovation processes. They rather require an open innovation approach involving internal and external stakeholders in co-creations. This perspective article gives first insights on which stakeholders to involve, how to involve them, and how to overcome barriers. Research- and practice-based experience shows that diverse stakeholders should be selected based on the needs of the specific innovation context and are best involved in a network approach, possibly combined with crowdsourcing. A three-step process is suggested to overcome organizational barriers and to successfully anchor circular innovations in the company. As most firms are not experienced in open circular innovation yet, this article aims at giving them first insights on the topic to support them on their way toward a circular economy","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85911951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Consumer Perceptions of Product Lifetimes and Labelling: Implications for Introducing a Durability Label","authors":"L. Milios, Carl Dalhammer","doi":"10.55845/ahfr5526","DOIUrl":"https://doi.org/10.55845/ahfr5526","url":null,"abstract":"Extending the lifetime of products enables material resource savings and provides an effective resource efficiency strategy within a circular economy paradigm. Although consumer demand for longer lasting products that can be easily repaired has been on the rise, it is not certain that consumers are fully able to identify such products and willing to pay a premium for them. France introduced a mandatory product repairability index in 2021 and plans to introduce a mandatory product durability index by 2024. The reasoning was to allow consumers to benchmark products, and to provide incentives for manufacturers to design durable and repairable products. This initiative would most likely speed up activities for developing a harmonised European Union (EU) labelling scheme to avoid the possibility that various EU countries start their own schemes, which could be problematic for business within the EU single market. However, there is uncertainty regarding how to best display a durability label for influencing consumer choice. This contribution reviews the literature on product durability information and labelling, addressing consumer perceptions on durability labelling and whetherthe provision of durability information is taken into account in purchasing decisions. Potential implications in durability labelling implementation are discussed, concluding the article with suggestions for overcoming potential implementation challenges.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75202028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Circular Economy Rebound: The Third Wheel on the Date Between Circularity and Sustainability","authors":"P. Zerbino","doi":"10.55845/ureh6873","DOIUrl":"https://doi.org/10.55845/ureh6873","url":null,"abstract":"The Circular Economy Rebound (CER) effect is a phenomenon that can compromise the capability of a Circular Economy to achieve its intended benefits. Its occurrence can lead to firms overstating their environmental performance and being prone to greenwashing. From a broader point of view, it jeopardises sustainability and economic prosperity from the circular transition and can hinder the decoupling between production and virgin resource extraction. Thus, CER may play a pivotal role in micro and macroeconomic decision-making and policy-making in a Circular Economy. Yet, it is largely unknown, and the search for concrete solutions to limit its occurrence and mitigate its effects is strongly overlooked. Accordingly, this perspective paper aims to increase awareness about CER and tease academics, practitioners, and policymakers to join forces and develop holistic, actionable solutions to manage this detrimental unintended consequence of establishing circularity.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"146 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88637941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Entrepreneurship in International Context: Trends and Coping With Eco-Entropy","authors":"R. Isaak","doi":"10.55845/hiyw8918","DOIUrl":"https://doi.org/10.55845/hiyw8918","url":null,"abstract":"The rupture of the international system by the Ukranian war provides ecopreneurial opportunities for circular economies given gaps in national sovereignties laid bare by protectionism. The entropy of a full range of human needs from jobs to housing, etc. can be countered with sustainable, ‘green-green’ start-up designs stimulated by state policies yielding chances for ‘individual sovereignty’ and positive future perspectives.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89986345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On Circularity, Complexity and (Elements of) Hope","authors":"Harald Desing, N. Blum","doi":"10.55845/wnhn7338","DOIUrl":"https://doi.org/10.55845/wnhn7338","url":null,"abstract":"A truly sustainable circular economy is more than just recycling, making it a complex matter. We argue that reducing complexity will ease the path to circular economy. Complexity reduction potential lies in lower material diversity, increasing accessibility and intuitive use for consumers, as well as simplifying business operations.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85661181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of recycling modes of power batteries based on extended producer-responsibility principle","authors":"Shuyuan Chen ,&nbsp;Mengjun Chen ,&nbsp;Jiancheng Shu ,&nbsp;Yi Deng","doi":"10.1016/j.cec.2022.100013","DOIUrl":"10.1016/j.cec.2022.100013","url":null,"abstract":"<div><p>To improve the effectiveness of recycling, echelon utilization, and recovery mechanism of waste power batteries (WPBs), 12 recycling modes were proposed based on extended producer-responsibility principle. By employing profit and sensitivity analyses, we found that resource-recovery companies (Rs) are the key for recycling, echelon utilization, and recovery mechanism. For R, the high resale price of waste LiNi_<em>x</em>Mn_<em>y</em>Co_{1−<em>x</em>−<em>y</em>}O₂ batteries was not conducive to recovering waste batteries. However, the recycling behavior of R was beneficial for resisting the risk of high resale price of waste LiNi_<em>x</em>Mn_<em>y</em>Co_{1−<em>x</em>−<em>y</em>}O₂ batteries. This condition increased the profits by saving on the buying cost and reselling of WPBs to echelon-utilization companies. Following the decrease in the number of recyclers in the recycling system, the profits of R also increased. However, when the proportion of recycled waste LiNi_<em>x</em>Mn_<em>y</em>Co_{1−<em>x</em>−<em>y</em>}O₂ batteries was 100%, the profits of R faced risks due to the high resale price of waste LiNi_<em>x</em>Mn_<em>y</em>Co_{1−<em>x</em>−<em>y</em>}O₂ batteries. For other recyclers, only the power-battery manufacturers (Ms) were willing to reduce the resale price of waste LiNi_<em>x</em>Mn_<em>y</em>Co_{1−<em>x</em>−<em>y</em>}O₂ batteries to let R earn profit because R supplied regenerated materials to M at a lower price than the material companies. This condition created a cycle for WPB recovery and reduced the use of raw materials. Thus, Mode M–R was considered as the optimal recycling mode.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"1 2","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167722000139/pdfft?md5=996fa7ef34d37fcfdb9ae549cb6bc055&pid=1-s2.0-S2773167722000139-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75644712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}