Resources, conservation & recycling advances最新文献

{"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}

{"title":"Evaluating the impact of passenger electric vehicle adoption on high renewable resources electricity grid","authors":"Balasubramanian Sambasivam ,&nbsp;Malolan Sundararaman","doi":"10.1016/j.rcradv.2023.200193","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200193","url":null,"abstract":"<div><p>A considerable amount of electricity is additionally demanded for Electric Vehicle (EV) charging due to rapid EV penetration. This study explores the impact of time of charging for different levels of passenger EV penetration on the electricity system using a case study electricity system with high penetration of renewable energy resources. A simulation approach is proposed to determine the new demand profile due to EV charging. Next, a Mixed Integer Linear Programming model is formulated considering the operation schedules of conventional power plants to mimic the real-time status of the electricity system. Finally, the developed approach considers the different possible interventions of actual EVs available in the market and tries to determine their impact in a renewable energy-dominated electricity system. The results from the study show that it is emission-friendly to encourage night charging rather than day charging for the considered renewable energy-dominated case study electricity system.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"20 ","pages":"Article 200193"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000652/pdfft?md5=661c543aec58d14a2ad393a366e9f541&pid=1-s2.0-S2667378923000652-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138471904","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":"Barriers to circular economy practices during construction and demolition waste management in an emerging economy","authors":"Vandana Bhavsar ,&nbsp;Srividhya Raju Sridharan ,&nbsp;J.S. Sudarsan","doi":"10.1016/j.rcradv.2023.200198","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200198","url":null,"abstract":"<div><p>The construction industry requires significant quantities of material and energy resources, which are either recycled or disposed as waste after demolition. Circular Economy (CE) facilitates the benefits of reuse and recycling of Construction and Demolition Waste (CDW) and promotes the industry in cradle-to-cradle or “Resolve” paradigms. However, in emerging economies, the industry merely achieves to harness a negligible amount of the CDW's intrinsic monetary benefit and sustainability, due to multiple barriers to circular practices. This study examines barriers that obstruct the incorporation of circular economy practices in the Indian construction industry. The study uses Relative Importance Index (RII), Factor Analysis, and Regression analysis to arrive at a list of macro-environmental barriers to the use of CE in CDW. The findings are presented using the PESTEL framework, with Political, Social, and Economic factors being the dominant barriers to the use of CE in CDW in emerging economies. Results from this study point towards the need for better guidelines by regulators for recycling of CDW, incentive schemes, and overall capacity building in emerging economies.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"20 ","pages":"Article 200198"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000706/pdfft?md5=d5a49802e1c75e811095c06fd0569b1b&pid=1-s2.0-S2667378923000706-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138500790","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":"Multivariate screening analyses of electrochemically driven nutrient recovery from wastewater using nutrient removal and energy consumption as responses","authors":"Babatunde I. Ojoawo ,&nbsp;Damilola A. Daramola","doi":"10.1016/j.rcradv.2023.200194","DOIUrl":"https://doi.org/10.1016/j.rcradv.2023.200194","url":null,"abstract":"<div><p>Crop production benefits from nutrients in animal wastewater, but direct usage has had an adverse impact on the environment. This impact could be mitigated by electro-precipitation of nutrients from wastewater for recovery as solid fertilizer. However, to recover these nutrients at high rates and minimize energy consumption requires an efficient evaluation of independent variables on these responses. This paper provides these analyses by evaluating the effect of five independent variables – temperature, cathodic potential, turbulence and molar ratios (Mg²⁺:Ca²⁺and N:P) – on phosphorus and nitrogen removal efficiencies and specific energy consumption.</p><p>Screening results indicate electrochemical P-removal was most affected by the Mg:Ca ratio, while N-removal was inconclusive due to the experiment duration. The specific energy consumption was most affected by Mg:Ca ratio, temperature and N:P ratio and could be made competitive with industrial routes by controlling these three variables. Overall, for the conditions assessed, struvite formation was most favored at lower temperatures.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"20 ","pages":"Article 200194"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000664/pdfft?md5=ebd834e6c27c8ebd1cadf04fb58670e7&pid=1-s2.0-S2667378923000664-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138557692","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":"Circular economy implementation strategies, barriers and enablers for UK rail infrastructure projects","authors":"Matthew James O'Leary,&nbsp;Mohamed Osmani,&nbsp;Chris Goodier","doi":"10.1016/j.rcradv.2023.200195","DOIUrl":"10.1016/j.rcradv.2023.200195","url":null,"abstract":"<div><p>The circular economy (CE) represents a shift away from society's traditional linear ‘take, make, disposal’ model of consumption, which exacerbates resource scarcity and climate change. It could also enable built environment sectors like rail infrastructure to operate and provide value for society more sustainably. However, while various strategies could support the CE transition, there is little evidence of their implementation for rail infrastructure to date. Also, despite growing research addressing CE practice in the built environment sector, most articles rely on secondary data. There is a need for more research based on primary data to bring new insights and guide the industry towards CE implementation. This research investigates the importance of CE implementation strategies, barriers and enablers for UK rail infrastructure projects through an industry-wide survey. It discusses the findings of an online questionnaire (<em>n</em>=50) and 15 semi-structured interviews with representatives from UK rail industry organizations. The results generally show rail infrastructure as being less commercial, but also more permanent, risk-averse and resistant to change. As such, value optimization and life extension should be more relevant than for buildings. However, greater resistance to change may hinder CE implementation, which is seen as requiring a paradigm shift away from the current linear model of consumption. Client leadership will be key in this respect, because of their scale, influence and long-term responsibility for asset ownership, but they may require support from government to overcome various structural factors. Government could also help by setting CE procurement requirements in contracts for rail infrastructure projects.</p></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"21 ","pages":"Article 200195"},"PeriodicalIF":0.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667378923000676/pdfft?md5=386c228a327db4a180914825fa38802d&pid=1-s2.0-S2667378923000676-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139297891","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}