Cleaner Waste Systems最新文献

{"title":"Sustainable concrete development using groundnut shell ash: A response surface methodology approach","authors":"Raghavendra Mahesh ,&nbsp;Shiva Kumar G ,&nbsp;Ujwal M.S. ,&nbsp;Likheeth J. ,&nbsp;Vinay A. ,&nbsp;Poornachandra Pandit","doi":"10.1016/j.clwas.2025.100379","DOIUrl":"10.1016/j.clwas.2025.100379","url":null,"abstract":"<div><div>Climate change and global warming are primarily driven by carbon dioxide (CO₂) emissions from fossil fuel combustion across energy, transportation, and industrial sectors. Among industrial contributors, the production of ordinary Portland cement (OPC) is a significant source of emissions due to its energy-intensive processes and chemical decomposition of limestone. Cement is widely used in concrete because of its cost-effectiveness and reliability; however, its high energy consumption and environmental impact necessitate the search for sustainable alternatives. Previous studies have explored various supplementary cementitious materials (SCMs), such as fly ash, silica fume, and groundnut shell ash (GSA), but many lack optimization in their application, particularly in tailoring the GSA content with water<img>cement (w/c) ratios to achieve optimal workability and mechanical performance. Additionally, existing research often overlooks systematic experimental designs that comprehensively evaluate fresh and hardened properties via advanced statistical techniques. This study addresses these gaps by employing response surface methodology (RSM) to optimize concrete mixtures incorporating GSA as a partial cement replacement (3–12 %) with w/c ratios ranging from 0.4–0.6. Workability (slump, Vee–Bee consistency, compaction factor) and mechanical properties (compressive strength, flexural strength, and split tensile strength) were evaluated according to Indian standards. The results demonstrated that the GSA significantly influenced the concrete properties, with an optimal mixture of 6.27 % GSA and a 0.42 w/c ratio achieving a desirability of 66.38 %. This study provides a data-driven approach to enhancing concrete sustainability by utilizing agricultural waste while addressing key shortcomings in prior research. The optimized concrete mixture not only demonstrated enhanced mechanical and fresh properties but also significantly contributes to the broader agenda of sustainable construction. By incorporating groundnut shell ash (GSA), an agricultural waste, this study promotes circular economy practices and reduces reliance on traditional cement, which is a major contributor to global CO₂ emissions. The findings underscore the feasibility of replacing a portion of OPC with GSA without compromising performance, thereby supporting the transition to greener infrastructure materials. This research lays the groundwork for scalable, eco-efficient concrete production, especially in regions with abundant agricultural residues.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100379"},"PeriodicalIF":3.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757218","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":"Physical and mechanical characterization of mortar with partial cement replacement by white mud (kamero)","authors":"Saroj Subedi,&nbsp;Md Tamanna Aalam,&nbsp;Sagar Ranabhat,&nbsp;Prabhat Baral,&nbsp;Laxman Bhujel,&nbsp;Tek Raj Gyawali","doi":"10.1016/j.clwas.2025.100380","DOIUrl":"10.1016/j.clwas.2025.100380","url":null,"abstract":"<div><div>With the increasing demand for cement but its production’s effect on CO₂ emission and land degradation, there is a pressing need to find viable alternatives that can partially or significantly replace it. Many studies have investigated the usage of various waste materials for the cement replacement. One promising area of research is focused on white mud (WM), exploring its potential as an effective replacement in construction materials. This study investigates the effectiveness of WM on the physical and mechanical properties of mortar. The control mortar was with water-cement ratio of 0.45 and cement: sand ratio of 1:1.92. The replaced content of WM to cement was 0.0 %, 2.5 %, 5.0 %, 7.5 %, and 10.0 % (by weight of cement). The required physical, mechanical, and durability tests of mortar were conducted. The findings suggest that the optimal replacement percentage is 2.5 %. It increased the 28-day compressive strength by 15.0 %, but decreased the splitting tensile and flexural strengths by 13.7 % and 7.5 %, respectively. The use of WM also caused the increase in the density resulting in the reduction of water absorption. The obtained results suggest that the substitute of cement with WM is viable in both aspects on enhancing the properties of mortar and reducing the cement consumption. Overall, this research highlights the potential of WM as an eco-friendly and effective partial cement replacement, especially at lower substitution levels, which not only enhances the required properties of mortar but also minimizes the cement consumption mitigating the problems of CO₂ emission and land degradation contributing to the sustainable development goals. The implementation of this finding offers multiple benefits, including the production of more sustainable and cost-effective concrete, protection of human health from WM dust through its proper utilization, and the rehabilitation of previously unusable land into fertile ground for increased agricultural productivity.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100380"},"PeriodicalIF":3.9,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757219","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":"The mediating role of environmental performance between green supply chain management and organizational market performance: Digitalization as a key dimension (In the case of the Ethiopian manufacturing industry)","authors":"Jemal Mekasha Yimer ,&nbsp;Aschalew Degoma Durie ,&nbsp;Abiot Tsegaye Kibiret","doi":"10.1016/j.clwas.2025.100376","DOIUrl":"10.1016/j.clwas.2025.100376","url":null,"abstract":"<div><div>Companies are increasingly exploring green supply chain management practices to integrate environmental considerations into their supply chains. However, little is known about the mediating role of environmental performance between green supply chain management practices and market performance. This research examines the mediating role of environmental performance in the relationship between green supply chain management practices and market performance. Structural equation modeling was employed to test the proposed hypotheses using a sample of 306 companies from a cross-sectional survey. Moreover, an independent sample T-test was also utilized to compare the practice level of two industries. The results indicate that digitalized green supply chain practice and green distribution directly improve firms' market performance, while sustainable packaging, green purchasing, and green manufacturing influence market performance indirectly through environmental performance. The study suggests that the primary driver for integrating digitalization in the Ethiopian manufacturing industry is economic benefits rather than environmental sustainability. Therefore, manufacturing firms should also consider the benefits of digitalization on their sustainability performance. Further, manufacturing firms should not solely expect immediate economic, market, and financial performance improvement from GSCM, but should recognize the long-term benefits that result from improved environmental sustainability.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100376"},"PeriodicalIF":3.9,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724739","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":"Seafood by-products from canning industry: A review on the environmental assessment of valorisation pathways and future trends","authors":"Cheila Almeida ,&nbsp;Maria Sapatinha ,&nbsp;Carla Pires ,&nbsp;Maria Leonor Nunes ,&nbsp;António Marques","doi":"10.1016/j.clwas.2025.100371","DOIUrl":"10.1016/j.clwas.2025.100371","url":null,"abstract":"<div><div>Seafood canning industries generate large amounts of by-products, including effluents, with high organic and salt contents. Valorisation treatments can transform by-products into valuable products applying a circular approach, however they also entail environmental impacts. This review analysis articles published between 2013 and 2023 on valorisation treatments for the production of value-added products from seafood canning industry by-products. It also verified to which extent the environmental performance of those treatments was considered by gathering information on the application of Life Cycle Assessment (LCA) methodology that assess impacts comprehensively. A second goal was to investigate the European Union (EU) seafood canning industry to provide data on potential by-products and amounts generated. A total of 18 valorisation treatments and 12 different products were found. Bioactive products represented 61 % of the products and polyhydroxyalkanoates (PHAs) and fish protein hydrolysates (FPHs) were the most frequently products obtained. FPHs are, proteins that are broken down into smaller peptides used to improve the functional and nutritional properties of food. PHAs serve as raw materials to replace petroleum-based plastics. A total of eight articles assessed environmental impacts of valorization options, but only six used LCA related with fishmeal production together with uses of by-products as fish oil, fish pâté, energy recovery, lipid extraction and PHAs production. Based on the EU annual production of canned seafood products, it was estimated that 511 k tonnes of by-products could be available. The valorisation of such by-products face challenges as their variability and degradation and, although it is a low-cost raw material, logistics are required to collect them. The environmental impacts, currently assessed of valorisation treatments are not representative of the most promising technologies and therefore it is still difficult to take evidenced-based decisions on the fate of the fish by-products coming from canning industries.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100371"},"PeriodicalIF":3.9,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721267","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":"Cold in-place recycling of asphalt pavement: A case study with laboratory and in-situ testing for a highway project in Southern Vietnam","authors":"Huu-Bang Tran ,&nbsp;Vu To-Anh Phan","doi":"10.1016/j.clwas.2025.100373","DOIUrl":"10.1016/j.clwas.2025.100373","url":null,"abstract":"<div><div>This paper provides a comprehensive analysis of the implementation of Cold In-Place Recycling (CIR) for asphalt mixtures, covering on-site investigations, reclaimed asphalt materials, laboratory testing, structural design, and field evaluations. In the CIR process, foamed asphalt and Portland cement were used as additives. The foamed bitumen was produced by combining bitumen with 3 % water at a flow rate of 10.8 m³/s, resulting in an expansion ratio of 8 and a minimum half-life of 6 s. CIR properties, such as indirect tensile strength under dry, wet, and equilibrium humidity conditions, were investigated. The results indicated that CIR with a foamed bitumen content of 1.9 % met the relevant requirements set by current standards. Additionally, incorporating 1 % cement into the foamed bitumen significantly enhanced the indirect tensile strength of the CIR by approximately 45.1 %. The combination of 1.9 % foamed bitumen and 1 % cement notably improved the tensile strength ratio, thereby increasing durability compared to other mixtures. Field construction was conducted, and test results confirmed that the in-situ CIR samples met the key requirements of AASHTO MP31-22, demonstrating the method's suitability for sustainable road construction.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100373"},"PeriodicalIF":3.9,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721160","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":"Underexploited hemp fiber as a blend constituent with cotton in producing vortex yarns: Toward a sustainable and cleaner future","authors":"Ahmed Jalal Uddin ,&nbsp;Md. Sakhawat Hossain","doi":"10.1016/j.clwas.2025.100374","DOIUrl":"10.1016/j.clwas.2025.100374","url":null,"abstract":"<div><div>Building a sustainable and cleaner future depends critically on harnessing abundant, eco- friendly, and renewable resources. Hemp, an underutilized yet promising fiber, offers a sustainable alternative across various industries, helping reduce dependence on synthetic, non-biodegradable materials while significantly contributing to environmental cleanup and waste reduction. In textiles, hemp emerges as a green substitute for cotton, especially in light of rising cotton prices and environmental concerns associated to its cultivation. However, hemp is coarse and stiff leads to poor spinnability, necessitating its blending with virgin fibers to produce viable yarn. Herein, for the first time, hemp/cotton blend yarn has been successfully produced in vortex spinning system, especially for knitwear applications where low hairiness, and high pilling and abrasion resistance are necessary. Departing from the conventional use of combed cotton in vortex spinning, this study employed carded cotton to help lower production costs. Through careful process optimization, 20 Ne (29.5 Tex) hemp/cotton yarns up to 30 % hemp content were successfully spun using the vortex method. For comparative analysis, yarns of the same count and blend ratios were also produced using ring and rotor spinning system. Results showed that vortex yarns had low hairiness similar to rotor yarns and notably lower than ring yarn. The unevenness and imperfections of vortex yarns are comparable to those of ring yarns but higher than rotor yarns. Tensile strength improved slightly in blends with 10 % hemp; however, as the hemp content increased, strength tended to decline. Nevertheless, vortex-spun yarns containing up to 30 % hemp were still deemed suitable for producing knit fabrics.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100374"},"PeriodicalIF":3.9,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721265","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 critical review on recycling and reuse of construction and demolition waste materials","authors":"R.K. Sakthibala,&nbsp;P. Vasanthi,&nbsp;C. Hariharasudhan,&nbsp;Pachaivannan Partheeban","doi":"10.1016/j.clwas.2025.100375","DOIUrl":"10.1016/j.clwas.2025.100375","url":null,"abstract":"<div><div>The construction and demolition industry is one of the main sources of environmental degradation. They produce vast amounts of waste and consume natural resources as well. Recycling and reusing construction materials are some solutions to overcome depletion of resources leading to sustainability. This addresses the environmental and economic advantages of using refined waste management techniques, including life cycle assessment, deconstruction methods, or even the reuse of concrete, metals, and glass. Innovative solutions also embrace recycling waste tyres, applying information technologies, such as Building Information Modeling (BIM), and measures in policies aimed at efficient use of resources. Case studies of the world represent a gap between the current recycling industry with potential form of well-coordinated international collaboration, innovative technology, and more stringent regulation standards. The study through detailed analysis of material recovery rates, waste management techniques accompanied with sustainable construction strategies, suggests the imperative to infuse circular economy principles into the C&amp;D industry. It culminates with reduced landfill, efficient use of resources, and enhances the footprint of the construction activity. The global generation of C&amp;D waste is estimated at 2–3 billion tons annually. This makes up 25–30 % of global waste produced annually. The annual growth rate of C&amp;D waste is estimated to be 3–5 %, based on the pace of urbanization, infrastructure development, and population growth. The U.S. Environmental Protection Agency (EPA) states that the United States produces over 600 million tons of C&amp;D waste annually. European Union annually produces about 400–500 million tons of C&amp;D waste. China alone produces nearly 1 billion tons of C&amp;D waste annually and is the world's largest producer.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100375"},"PeriodicalIF":3.9,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738664","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":"Stakeholders analysis of deposit refund waste collection system based on quality function deployment method","authors":"Marah Almelhem ,&nbsp;Eszter Sós ,&nbsp;Péter Földesi","doi":"10.1016/j.clwas.2025.100370","DOIUrl":"10.1016/j.clwas.2025.100370","url":null,"abstract":"<div><div>This study proposes a structured conceptual model for analyzing stakeholder complexity within Hungary’s newly implemented Deposit Refund System (DRS), using the Quality Function Deployment (QFD) framework. A House of Quality (HoQ) matrix was developed to map the relationships between the functional features of the system and the specific requirements of key stakeholders, including government, system operators, manufacturers, retailers, and customers. A qualitative focus group method was applied to gather expert input and evaluate system features based on stakeholder experience and the evolving Hungarian context. Rather than aiming for statistical generalization, the study focuses on illustrating how structured modeling can reveal stakeholder trade-offs and support strategic alignment in complex waste collection systems. Findings highlight areas of convergence and divergence among stakeholders and demonstrate the utility of the QFD-based approach in designing adaptable, stakeholder-informed DRS models. The results are particularly relevant for countries in the early stages of DRS implementation or those seeking to redesign existing systems to better integrate technical feasibility and stakeholder priorities.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100370"},"PeriodicalIF":0.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702613","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":"Which nudge works best? Testing Interventions for recyclable waste across residential types","authors":"Nuttaporn Rochanahastin ,&nbsp;Shinawat Horayangkura","doi":"10.1016/j.clwas.2025.100367","DOIUrl":"10.1016/j.clwas.2025.100367","url":null,"abstract":"<div><div>This research applies a well-known behavioral economic concept, the nudge theory, to promote waste segregation behavior. The study has three main objectives. First, it investigates whether nudge-based interventions enhance waste segregation behavior. Second, it identifies the most effective intervention and, third, assesses its impact across different residential types. A 32-week field experiment was conducted across 12 residential sites, covering detached houses, townhouses, and condominiums in the east of Bangkok Metropolitan area. All sites participated in a 16-week baseline phase followed by a 16-week intervention phase and were randomly assigned to one of four groups: information framing, physical adaptation, social norms and feedback, or control. Results show that all three interventions improved recycling behavior, with physical adaptation yielding the largest increase in recyclable waste weight (+82.13 %), followed by social norms and feedback (+74.41 %) and information framing (+49.60 %). When examined by residential type, condominiums exhibited the highest overall responsiveness (+101.94 %), followed by townhouses (+57.15 %), while detached houses showed a decline. This study provides valuable insights into the effectiveness of nudge theory in promoting waste segregation behavior and highlights the need for tailored strategies based on residential contexts to maximize intervention success.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100367"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721266","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":"Appraisal of heavy metals leaching from waste materials building blocks","authors":"Md. Arif Hossen ,&nbsp;G M Sadiqul Islam","doi":"10.1016/j.clwas.2025.100368","DOIUrl":"10.1016/j.clwas.2025.100368","url":null,"abstract":"<div><div>Industrial waste can release heavy metals into the environment, posing a significant threat to the ecosystem. There is not enough information on the leaching behaviour of industrial waste when used in the concrete system. The study aimed to determine the leaching of heavy metals from industrial waste encapsulated in building blocks. A semi-dynamic tank and Batch leaching method were used to identify leaching characteristics. X-ray Fluorescence (XRF) and X-ray Diffraction (XRD) techniques were used to characterize raw materials. The total concentrations of heavy metals in the raw materials were observed in the following order: Fe &gt; Mn &gt; Cu &gt; Zn &gt; Cr &gt; Cd &gt; Pb. It is crucial to highlight that the leached heavy metal content from the examined two building blocks was within the threshold values set by the Bangladesh Standards and the European Union for discharge into the environment. The percentages of Cr released were the highest among all heavy metals. Based on semi-dynamic tank leaching data, log-log plots of cumulative heavy metal leaching versus time revealed that matrix dissolution-controlled Fe, Mn, and Cr leaching, while diffusion-controlled Zn, Cu, and Cd leaching. Batch leaching experiments showed that as the pH of the solution shifted from acidic to alkaline, the leaching rate decreased for all the examined heavy metals, except for Cr and Cd. Since the rate of heavy metals leaching was found to be very small relative to total concentrations, it can be claimed that the usage of investigated waste materials as building blocks for building materials is safe for the environment.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100368"},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685859","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}