Circular Economy最新文献

{"title":"Extended producer responsibility for low carbon transition in automobile industry","authors":"Jiahui Peng ,&nbsp;Xiaolei Shi ,&nbsp;Xin Tong","doi":"10.1016/j.cec.2023.100036","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100036","url":null,"abstract":"<div><p>Extending the responsibility of producers to the entire lifecycle of their products requires additional incentives for the companies to align the efforts of all stakeholders in production and consumption. Using corporate information disclosure as a tool in extended producer responsibility has been a solution in the automobile industry in China to encourage the producers to actively take responsibility in their supply chain. Meanwhile, the low-carbon transition has become a critical incentive for producers to seize the opportunities in carbon emission reduction through the closed-loop supply chain. This study reviews the carbon emission information disclosed by automobile manufacturers in their open reports on sustainability to identify the strategic links between circularity and low-carbon transition from the perspective of producers. The findings are as follows: (1) The global disclosure systems, such as Carbon Disclosure Project, have been increasingly adopted in automobile industry in China; (2) the carbon trading market is crucial for long-term incentives; (3) information sharing mechanism is needed for supply chain cooperation in capturing the low carbon value through closed-loop strategy.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 2","pages":"Article 100036"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50183830","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":"Optimising Public Procurement Through Circular Practice: The Power of Intermediation","authors":"Emanuela Vanacore, Leticia Fuertes Giné, A. Hunka","doi":"10.55845/gxgr4467","DOIUrl":"https://doi.org/10.55845/gxgr4467","url":null,"abstract":"The public sector is a key economic player in society with a significant purchasing power and therefore has the potential to promote societal change while maintaining a degree of control over use of public funds, transparency and fairness. However, current public procurement processes largely result in purchasing products and services through a generally more pre-planned and rigid type of process. In this paper we argue that the current public procurement process is not “fit for purpose” for a transition to large-scale circular public procurement which aims to optimise value retention. In order to overcome this, we propose a conceptual framework that could support public organisations in aligning the procurement processes and structures with the value propositions of their own operations. We suggest that intermediation is the key enabler for a transition to a more circular economy by stimulating innovation in public procurement and with an ecosystem perspective.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87897473","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":"Challenges and Paradoxes in Researching in Circular Economy","authors":"M. Arnold","doi":"10.55845/oemk9774","DOIUrl":"https://doi.org/10.55845/oemk9774","url":null,"abstract":"Shaping and researching the circular economy involves multiple paradoxes and challenges hardly manageable by a single researcher or practitioner. This perspective argues for taking a more systemic viewpoint and multiple level perspective in order to better interlock skills. A systemic design of circular economy research requires multi-stakeholder collaboration and new opportunities for intervention.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86513248","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":"Converting fruit waste to 3D printed food package casings: The case of banana peel","authors":"Sundus Nida,&nbsp;Jeyan A. Moses,&nbsp;C. Anandharamakrishnan","doi":"10.1016/j.cec.2022.100023","DOIUrl":"https://doi.org/10.1016/j.cec.2022.100023","url":null,"abstract":"<div><p>Resource recovery and better use of food processing wastes are topics of significant attention. Fruit wastes in particular are perishable yet contain a wealth of unrealized advantages. This study presents the 3D printability of banana peel (BP) powder with the addition of guar gum (GG). The particle characteristics of BP powder were analyzed. The microscopic morphology of the BP powder was found to be erratic and clumped. The printability of extruded material supply was optimized after the characterization of BP and BP + GG material supplies. When 6 bar pressure was used and the motor speed was 150 rpm, it was found that the BP + GG material supply could be printed utilizing a 1.2 mm nozzle diameter. Printing speed and printing rate was optimal at 500 mm/min and 0.186 ± 0.002 g/min, respectively. A nozzle height of 0.8 mm was found to be optimal for printing. Thus, non-printable BP was made printable and the concept can be applied to the development of unique and customized food packaging casings. The results of this study shed light on how various agri-food wastes can be used to create biodegradable 3D-printed structures.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100023"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199303","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":"Upgrading waste electrical and electronic equipment recycling through extended producer responsibility: A case study","authors":"Kun Li ,&nbsp;Yufei Qin ,&nbsp;Daolong Zhu ,&nbsp;Shengen Zhang","doi":"10.1016/j.cec.2023.100025","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100025","url":null,"abstract":"<div><p>The implementation of extended producer responsibility (EPR) promotes upgrading and standardization of the recycling of waste electrical and electronic equipment (WEEE) in China, reducing the risk of environmental pollution. This paper discusses China's WEEE management via EPR and identifies the four phases and their features of the development of WEEE recycling since the fund subsidy scheme was implemented in 2012. Using GEM Co., Ltd. as an example, this paper explains how the recycling company closed the loop on WEEE recycling, improved the added value of dismantling WEEE through technological innovation, recycled high-quality secondary materials, established a whole waste plastics traceability system, and explored the non-fund subsidies for recycling WEEE. It is suggested that the government take new measures to eliminate outdated enterprises and promote a WEEE disposal industry in the direction of company groups. China might also vigorously advocate for new technologies and equipment to reduce labor costs and enhance the added value of dismantled products. Such efforts would encourage all enterprises to actively participate in EPR, strengthen their ability and willingness to recycle WEEE and reuse recycled materials, and build a closed-loop green supply chain for electrical and electronic products.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100025"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199987","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":"A global perspective on e-waste recycling","authors":"Kang Liu ,&nbsp;Quanyin Tan ,&nbsp;Jiadong Yu ,&nbsp;Mengmeng Wang","doi":"10.1016/j.cec.2023.100028","DOIUrl":"https://doi.org/10.1016/j.cec.2023.100028","url":null,"abstract":"<div><p>Electronic waste (e-waste) is one of the relatively fast-growing solid waste streams, with an annual growth rate of 3%–5%. Although international policies have been formulated to better limit the global transboundary movement of hazardous waste, the existence of illegal trade and “informal” recycling has exacerbated the global recycling of e-waste. At present, residents in many low-income areas are still illegally and unscientifically disposing of e-waste to profit from it. The toxic and harmful substances produced affect the global ecological environment through the geochemical cycle. In this review, we provide a systematic overview of the status quo of e-waste recycling globally. E-waste is placed into a framework, grouped by product type, quantity, composition, environmental health risk, and global impact. Management measures, legislative policies, current disposal, and transboundary movement are summarized at international, regional, and national levels, illustrating the status and challenges of e-waste collection and disposal. Techniques such as physical dismantling, component recycling, metal extraction, and re-utilization of non-metallic materials are described, which can have long-term impact on the ecosystem. We advocate that the global sustainable recycling of e-waste be supported by regional cooperation, legislative management, technology development, and eco-friendly design. This study provides a global solution for the recycling of e-waste.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"2 1","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199304","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":"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}