Resources, conservation & recycling advances最新文献

{"title":"The role of product design in advancing the circular economy of electric and electronic equipment","authors":"Juhoantti Köpman,&nbsp;Jukka Majava","doi":"10.1016/j.rcradv.2024.200207","DOIUrl":"https://doi.org/10.1016/j.rcradv.2024.200207","url":null,"abstract":"<div><p>Circular economy (CE) processes, such as reuse, remanufacturing, and recycling, play a significant role in reducing the environmental impacts of modern manufacturing industries. However, electric and electronic equipment (EEE) is still often designed to function for a short usable life after which it is discarded. Furthermore, the current relatively low price and high availability of virgin raw materials, compared to those of recycled materials, decrease the financial viability of recycling. This study conducts a systematic literature review on product design-related issues in the CE of EEE and induces a novel model of product design considerations for the CE of EEE. The aim is to identify design traits that are hindering the CE of EEE and what measures can be taken in the product development phase to create EEE compatible with CE. This study points out general issues in the disassemblability and recyclability of EEE, as well as a recurring theme of conflicting design needs between different CE processes. Furthermore, the minimum entropy product design priority model is introduced as the novel contribution of this study to highlight the dependency between technological maturity, expected product lifespan, and suitable CE processes.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200207"},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000063/pdfft?md5=31146655f88d68362be056d41d350213&pid=1-s2.0-S2667378924000063-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140024078","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}

{"title":"Heterogeneity analysis of carbon intensity influence factor and low carbon economy path in east of China","authors":"Miao He ,&nbsp;Wei Xiao ,&nbsp;Mouyuan Fan ,&nbsp;Yuanlu Xu","doi":"10.1016/j.rcradv.2024.200208","DOIUrl":"https://doi.org/10.1016/j.rcradv.2024.200208","url":null,"abstract":"<div><p>This study expands the STIRPAT framework and utilizes mechanistic analysis and spatiotemporal heterogeneity analysis to examine the impact of market integration on carbon emission intensity and heterogeneity in East China. The findings reveal that market integrations play a significant role in reducing carbon emission intensity, and tax environment, urbanization, and consumption power prove to be important mechanism factors. The average treatment effect of industrial structure and energy structure also positively promotes emission reduction efforts. However, market integration coupling coordination degree, technology level, and the gap in high-quality development act as inhibiting factors on carbon emission intensity. Furthermore, the spatial and temporal heterogeneous evolution trend demonstrates distinct and evident agglomeration patterns among economic regions. To effectively leverage the unified large market mechanism to reduce carbon emission intensity, it is essential to consider the regional characteristics of different influencing factors and also focus on the role of important node cities in driving emission reduction efforts.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200208"},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000075/pdfft?md5=16c41fa2a7cd0d1b3fda87bf1547e82c&pid=1-s2.0-S2667378924000075-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999111","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}

{"title":"Properties, production, and modification of polyhydroxyalkanoates","authors":"Xiangmin Liang ,&nbsp;Daniel K. Cha ,&nbsp;Qingqing Xie","doi":"10.1016/j.rcradv.2024.200206","DOIUrl":"https://doi.org/10.1016/j.rcradv.2024.200206","url":null,"abstract":"<div><p>Polyhydroxyalkanoates (PHAs) are polymers synthesized by diverse bacteria for carbon and energy storage applications. PHAs are biodegradable and nontoxic. They also exhibit properties similar to those of petroleum-based polymers. Therefore, these materials are promising alternatives to conventional plastics. This review aims to provide a comprehensive overview of PHA research, from production to application. This review summarizes the thermal and mechanical properties of various PHA homopolymers and copolymers, and compares them with those of common petroleum-based polymers. This comparison indicates that elongation at break is a major weakness of many PHAs. Different organic wastes used in PHA microbial production by mixed culture fermentation are summarized in this review. Important parameters of feedstock fermentation, culture selection, and PHA accumulation were compared. The pH and organic loading rate significantly affected the overall PHA yield, and various feedstocks led to different PHA compositions. Physical (blending and fiber reinforcement) and biological (cofeeding) modifications to improve the mechanical properties of PHA are elaborated in this review. Tensile properties are the major improvements among the mechanical properties after modification. Current applications of PHA and its derivatives are also presented in this work. They are primarily applied in the medicine, agriculture, and packaging industries. The widespread application of PHA faces challenges such as high production costs and limited mechanical properties. This study intends to stimulate further research into cost-effective methods for PHA production and to explore additional modification techniques.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200206"},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000051/pdfft?md5=3f8edf8d5af8a8afd996efbd11020873&pid=1-s2.0-S2667378924000051-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139936303","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}

{"title":"Industry hybrid regulation: Exploring a model for business-driven circular economy","authors":"Hadi Chapardar","doi":"10.1016/j.rcradv.2024.200205","DOIUrl":"https://doi.org/10.1016/j.rcradv.2024.200205","url":null,"abstract":"<div><p>Government is often seen as the arbiter for environmental protection. Alternatively, firms can volunteer to proactively take collective action toward sustainability, called industry self-regulation. But, what happens when neither of the two alternatives can deliver the expected outcomes? This inductive study addresses such a situation in managing hazardous consumer waste in the province of Ontario, Canada, where waste management and later circular economy have been on the agenda since the 1980s. However, both self- and government regulation failed to spur the advancements required to close material loops effectively and efficiently. Finally, after three decades, actors developed a new path to transition to circular economy. This longitudinal process study focuses on this process to explore the changes in business-policy interactions that realized this transition. I analyze extensive qualitative data, including 55 interviews with top-level decision-makers in all stakeholder groups (businesses, policy-makers, NGOs, consultants, etc.). Based on the unearthed patterns, I propose a hybrid model for regulation. In this model, both business and government coordinate throughout the process to set the rules and enforce them. By allowing organically shaped competition, this model can spur proactivity and innovation, which are crucial for the transition to circular economy but are hard to incentivize in conventional policy-making. The model can be used in any situation where an urgent issue needs immediate proactive responses by business.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200205"},"PeriodicalIF":0.0,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266737892400004X/pdfft?md5=3d8463a76058f22114f35e0e2d8e47a3&pid=1-s2.0-S266737892400004X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139936241","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}

{"title":"Utilization of high-volume fly ash in pervious concrete mixtures for mangrove conservation","authors":"Januarti Jaya Ekaputri ,&nbsp;Xevna De Elshinta Arellsya Ruitan ,&nbsp;Himawan Tri Bayu Murti Petrus ,&nbsp;Martin Anda ,&nbsp;Liliek Harmianto Purbawinasta ,&nbsp;Irwanda Laory ,&nbsp;Davin H.E. Setiamarga ,&nbsp;Nobuhiro Chijiwa ,&nbsp;Chikako Fujiyama","doi":"10.1016/j.rcradv.2024.200204","DOIUrl":"10.1016/j.rcradv.2024.200204","url":null,"abstract":"<div><p>In environmental conservation, mangrove forests play a crucial role. Retransplanting mangrove propagules, however, faces challenges, and success rates are notably low. Achieving an optimal protector for propagules, balancing strength without impeding growth, is challenging. Mangrove propagules require a temporary protector with an optimal balance, neither too weak nor too strong, to shield them from current waves which is difficult. We propose using pervious concrete pots with high-volume fly ash activated with low NaOH concentrations. The investigation focuses on the influence of the mixing procedure on workability, compressive strength, and mineral composition. The novel discovery in this study is the specific sequence of stirring the ingredients using an alkali activator, which adds an interesting dimension to the research. It is recommended to adopt Sequence 2 in pervious concrete production, where NaOH dissolved FA in the mixture forming albite as N-A-S-H gel product. It surely enhanced both workability and the strength confirming uniform application processes. The two recommended variants, PFS-60 and PFBS-50, effectively utilize coal ash, meeting the target compressive strength range of 3–5 MPa and providing support for mangrove pots over a 3–4 year period. Notably, both compositions maintained consistent mechanical properties during exposure to tidal conditions for 240 days.They exhibit high permeability (694 liter/m²/minute), facilitating efficient water passage without sediment entrainment.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200204"},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000038/pdfft?md5=c9625f37996778e2e5a229d3c14b907b&pid=1-s2.0-S2667378924000038-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139875903","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}

{"title":"Advancing environmental assessment of the circular economy: Challenges and opportunities","authors":"Dwarakanath Ravikumar ,&nbsp;Gregory A. Keoleian ,&nbsp;Julien Walzberg ,&nbsp;Garvin Heath ,&nbsp;Martin C. Heller","doi":"10.1016/j.rcradv.2024.200203","DOIUrl":"https://doi.org/10.1016/j.rcradv.2024.200203","url":null,"abstract":"<div><p>The lifecycle assessment (LCA) framework is widely applied to comprehensively evaluate and improve the environmental performance of a circular economy (CE). The advances and application of LCA has been primarily restricted to evaluate the environmental performance of the CE at a micro-level, wherein the CE is implemented for a single product system.</p><p>However, the CE can be operationalized at two broader levels: the meso–level (for eco-industrial parks) and the macro-level (for a city, state, or nation). Six methodological challenges emerge when applying LCA to a meso‑ or macro-level CE and remain unaddressed in the existing literature. This includes: selecting a relevant system boundary and functional unit, addressing data paucity and uncertainty, accounting for stakeholder behavior, assessing the trade-offs from renewable energy (RE) use, accounting for manufacturing and technology evolution, and quantifying displacement and rebound. This article proposes potential solutions and research priorities to address the above challenges.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200203"},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000026/pdfft?md5=3c6c5670953a35642ca14ebe67342c45&pid=1-s2.0-S2667378924000026-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139505537","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}

{"title":"The 21 most practiced RE-s of circular economy from LinkedIn company profiles on a global scale","authors":"Georgios Tsironis ,&nbsp;Theodoros Daglis ,&nbsp;Konstantinos P. Tsagarakis","doi":"10.1016/j.rcradv.2024.200202","DOIUrl":"10.1016/j.rcradv.2024.200202","url":null,"abstract":"<div><p>LinkedIn is a social media networking platform that provides users with publicly available data related to user and company profiles, job advertisements, groups, events, services, etc. The main feedback on the organizational trends around the Circular Economy (CE) has been mostly based on corporate reports and survey analytics while there are huge data volumes available online. This article aims to deliver valuable insights regarding global CE business activities. Those insights arise from data extracted οut of 7533 companies’ profiles on LinkedIn, containing the term CE in any profile section. Some significant findings include the companies’ geographical distribution (headquarters), the different industry sectors, each company's number of employees, followers, and foundation year. The last shows a significant increase in new CE companies over the last decade. Additionally, our work focuses on companies’ specialties and descriptions, which provide each organization's business activities and specialization. Finally, we investigated the presence of already studied and new Re- strategies, complemented by their most important interactions which undeniably indicate the dominance of the reuse-reduce-recycle triptych.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200202"},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378924000014/pdfft?md5=b77b87cdad9216edb5d3c27e71034ce1&pid=1-s2.0-S2667378924000014-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139458043","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}

{"title":"Agent-based simulation for technology implementation in an energy-based industrial symbiosis network","authors":"Zohre Saghafi,&nbsp;Ramin Roshandel","doi":"10.1016/j.rcradv.2023.200201","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200201","url":null,"abstract":"<div><p>Agent-based modeling is a promising approach in industrial symbiosis (IS) simulation due to its bottom-up approach. However, the role of implementing feasible technologies in agent-based modeling of IS has been underexplored. In this paper, an agent-based model was developed to optimize the economic benefits of IS stakeholders in a case study region. Feasible technologies were integrated into the proposed model to generate additional economic profit and enhance circularity. The model was implemented on a case study involving a chicken farm, cow farm, dairy, edible oil plant, and a Combined Heat and Power (CHP) plant. Technologies including anaerobic digestion, organic Rankine cycle, heat pump, and membrane separation were employed to produce biogas, recover waste heat, and purify wastewater. While the fossil-based energy consumed by industries reduced, all the waste streams could be recovered. The techno-economic specifications of these technologies had a significant impact on the symbiotic relationships.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200201"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000731/pdfft?md5=3c79fb57bfaf2fd5a3c3eec6f11fb282&pid=1-s2.0-S2667378923000731-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139089987","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}

{"title":"Enhancing economic-social sustainability through a closed-loop citrus supply chain: A life cycle cost analysis","authors":"Emad Alzubi ,&nbsp;Ahmed Kassem ,&nbsp;Ani Melkonyan ,&nbsp;Bernd Noche","doi":"10.1016/j.rcradv.2023.200199","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200199","url":null,"abstract":"<div><p>The focus on food supply chain (FSC) sustainability has grown due to demand, food loss and waste, and environmental impacts. This study aims to quantify citrus life cycle costs (LCC) and determine the main drivers and their contributions. LCC was used to assess the cradle-to-grave cost of 1 kg of citrus sold to consumers at the retailer stage. A comparison was made between an existing citrus supply chain (SC) and a proposed closed-loop structure. In addition to the current citrus SC, four different cases were analyzed and evaluated: the centralized linear citrus SC, the centralized linear citrus SC with a 33 % increase in labor income, the centralized closed-loop citrus SC, and the centralized closed-loop citrus SC with a 33 % increase in labor income. The results showed significant reductions in functional unit's (FU) costs of 48 %, 38 %, 54 %, and 44 %, respectively, compared to the current citrus SC. Labor accounted for 47–62 % of the FU costs, while agriculture inputs and transportation contributed 15–28 % and 12–16 %, respectively. The study revealed that a centralized citrus closed-loop SC improves economic viability, especially when recycling citrus waste as compost for farms. Transportation currently contributes the most to FU costs (45 %), but in the closed-loop citrus SC, labor becomes the highest contributor (62 %). This cradle-to-grave citrus SC approach identifies drivers and contributions to the FU's costs, showcasing differences when integrating a circular economy. Future research may explore the impact of other byproducts on FU costs.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200199"},"PeriodicalIF":0.0,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000718/pdfft?md5=9aa94986a95a1ec31ecf256efc7e53d2&pid=1-s2.0-S2667378923000718-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138570459","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}

{"title":"Limestone calcined clay cement (LC3): A sustainable solution for mitigating environmental impact in the construction sector","authors":"Balamurali Kanagaraj ,&nbsp;N Anand ,&nbsp;U Johnson Alengaram ,&nbsp;R Samuvel Raj ,&nbsp;S Karthick","doi":"10.1016/j.rcradv.2023.200197","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200197","url":null,"abstract":"<div><p>The impact of global warming on the construction sector is a serious issue in today's world; this might be attributed to the emission of greenhouse gas (GHG) during the production process of Portland cement. Due to its advantages, cement plays a major role in the construction of civil infrastructures. Cement production is not only responsible for global warming and also creates a risk of raw material deficiency. To reduce the over exploitation of virgin materials, Limestone Calcined Clay Cement (LC³), with a proportion of Clinker 50 %, Limestone 30 %, Calcined Clay 15 % and gypsum 5 %, is found to be a suitable and sustainable alternative to preserve the ecosystem. As a result, attempts were undertaken in this work to create a mixture design approach for LC³ with the primary objective of developing higher compressive strength (CS) in a cost-effective manner. The relationship between the water to binder ratios and 28-d CS has been examined to suggest a conceptual mixture design strategy for LC³ rationally. The 28-day CS of 46.2 MPa has been observed. The suggested design technique has been presented step by step and validated using an example based on the guidelines illustrated by IS 10,262. The design technique aims to produce a concrete mix that meets specific strength, workability, and durability requirements while considering the environmental conditions and properties of materials available. The study emphasizes a systematic approach to concrete mix design, considering various factors like water-cement ratio, aggregate proportions, and workability requirements to ensure the resulting concrete meets the desired performance standards. Compliance with IS 10,262:2019 ensures that concrete used in construction is designed systematically and according to established guidelines, leading to higher quality and more predictable performance in structural applications. Further, to access the sustainability of the developed LC³ mix Life-Cycle Assessment (LCA) of LC³ was reported starting from raw material procurement to the production of concrete as the final product. In this LCA analysis, the monetary cost involved in the production of concrete, energy demand and GHG emission of the LC³ was compared with the conventional concrete. The result from the analysis revealed that LC³ possess superior performance in terms of energy requirement and GHG emission than the OPC concrete.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200197"},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266737892300069X/pdfft?md5=612faab9726eee956d70654997511232&pid=1-s2.0-S266737892300069X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138582054","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}