Cleaner Waste Systems最新文献

{"title":"Social capital as a key predictor in solid rural waste management: A case study of rural residents in Iran","authors":"Alireza Alipour ,&nbsp;Seyedeh Shadi Mousavi,&nbsp;Mohammad Sadegh Ebrahimi","doi":"10.1016/j.clwas.2025.100293","DOIUrl":"10.1016/j.clwas.2025.100293","url":null,"abstract":"<div><div>The rapid increase in population and heightened human activities have led to significant waste generation, posing challenges even in rural communities. Despite the importance of this issue, there is a clear shortage of research focused on the connection between social capital dynamics and waste management practices in these settings. To address this gap, this study investigates the relationship between social capital and solid waste management behaviors in rural areas, in the Semirom region of Isfahan province, Iran. Data were collected from 150 rural residents using a simple random sampling method and a questionnaire interview in 2024. Metrics for solid waste management and components of social capital were computed, and data analysis was conducted using the Pearson correlation coefficient, artificial neural networks, and stepwise regression. The results indicated a strong correlation (0.76) between the overall social capital index and solid rural waste management scores, with social capital identified as a more crucial predictor of solid waste management practices than socio-economic factors. Among the components of social capital, social ethics, and social participation were found to have a positive and significant impact on solid waste management behaviors, with each unit increase in social ethics improving waste management behavior by approximately 1.41 units and each unit increase in social participation enhancing it by about 0.76 units. The study concludes that strengthening waste management practices in rural areas can be achieved by improving social capital and promoting greater community participation through education and engagement initiatives.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100293"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934980","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":"Material flow analysis of construction and demolition waste recycling under circular economy","authors":"Jingkuang Liu,&nbsp;Guangyi Ye,&nbsp;Piao Wu,&nbsp;Yuxuan Li,&nbsp;Jian Zhu","doi":"10.1016/j.clwas.2025.100303","DOIUrl":"10.1016/j.clwas.2025.100303","url":null,"abstract":"<div><div>The goal of the circular economy in construction and demolition waste (C&amp;DW) recycling management is to reduce or even eliminate the dumping of C&amp;DW into landfills or incineration. It also aims to scale up the recovery, reuse and recycling of C&amp;DW and to realize the potential of recycled products from C&amp;DW to be used in new buildings. This paper takes Guangzhou City, China, as an example, and applies the material flow analysis method to establish a detailed material flow analysis framework and indicator evaluation system for the C&amp;DW recycling system. Subsequently, through the data collection of the production of C&amp;DW in Guangzhou City in 2022, this paper constructed a visualized Sankey diagram of the C&amp;DW flow, sorted out the flow and direction of the C&amp;DW flow and conducted an in-depth analysis of the evaluation indexes of the system. The study obtained a recovery rate of 39.1 % for the C&amp;DW recycling system and only 9.2 % for the C&amp;DW recycling rate. It shows that the current Guangzhou C&amp;DW recycling system is less efficient in the recycling and utilization of materials, and there exists a greater potential for value-added to the circular economy, and finally indicates the need to further study and analyze the obstacle factors in the development process of C&amp;DW recycling under the circular economy. The research results can provide theoretical guidance for the formulation of policies related to the recycling of C&amp;DW under the circular economy.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100303"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869687","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":"E-waste management in Bangladesh: Environmental impacts, health risks, and sustainable policy strategies","authors":"Md. Shafikul Islam ,&nbsp;Md. Rakib Hasan ,&nbsp;Khodadad Mostakim ,&nbsp;Md. Sadman Anjum Joarder ,&nbsp;Md. Hasibul Hasan ,&nbsp;Md. Rejuan Ahmed","doi":"10.1016/j.clwas.2025.100297","DOIUrl":"10.1016/j.clwas.2025.100297","url":null,"abstract":"<div><div>The management of electronic waste (e-waste) is a critical issue, particularly in developing countries like Bangladesh, where infrastructure and regulatory frameworks are often inadequate. Recent estimates indicate that Bangladesh generated approximately 367 million kilograms (367,000 metric tons) of e-waste in 2024, equating to 2.2 kg per capita annually (0.006 kg/person/day), with e-waste constituting 2.3 % of municipal solid waste (MSW). Notably, shipbreaking activities—a major contributor—add an additional 2.5 million metric tons of e-waste annually, though this is often excluded from domestic estimates. This paper provides a comprehensive analysis of the current e-waste management scenario in Bangladesh, highlighting both the environmental and health hazards associated with improper disposal practices. The study examines novel e-waste treatment technologies, including mechanochemical treatment, hydrothermal processes, pyrolysis, gasification, and hydrocracking, to determine their feasibility in the region. Furthermore, it reviews e-waste components and hazardous substances, emphasizing the environmental and health impacts, particularly on vulnerable populations such as children and informal sector workers. The paper also examines existing e-waste management policies and legislation in Bangladesh, identifying gaps and suggesting improvements based on international best practices. It underscores the potential for resource recovery from e-waste, contributing to the circular economy, and discusses the economic benefits of effective e-waste management, including job creation and the development of a sustainable recycling industry. Finally, the study offers actionable recommendations for policymakers and practitioners aimed at enhancing e-waste management practices in Bangladesh, thus promoting a safer and more sustainable environment. Through this focused analysis, the paper aims to contribute to the ongoing discourse on e-waste management and provide insights that can help bridge the gap between Bangladesh and more developed nations in terms of e-waste handling and regulatory frameworks.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100297"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869688","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":"Waste not, want not: Comprehensive valorization of fruit and vegetable waste from single-product recovery to zero-waste strategies","authors":"Somayeh Taheri ,&nbsp;Seyed Saeid Hosseini","doi":"10.1016/j.clwas.2025.100300","DOIUrl":"10.1016/j.clwas.2025.100300","url":null,"abstract":"<div><div>The increasing volume of fruit and vegetable waste (FVW) has prompted growing interest in sustainable valorization strategies. This review introduces a structured framework to assess different valorization approaches including single-product, multiple-product, and zero-waste valorization (ZWV) of FVW. In the single-product approach, selected bioactive compounds such as polysaccharides, exopolysaccharides, and/or antioxidants are recovered, while the multiple-product strategy integrates co-extraction and sequential processing to enhance material utilization. The ZWV approach is presented as the most comprehensive model, aiming to eliminate final waste by combining green extraction methods, microbial bioconversion, and circular economy principles. The paper discusses both conventional and emerging extraction methods, highlights recent advances in combining extraction with fermentation, and reviews case studies demonstrating the production of compounds such as exopolysaccharides and single-cell proteins from residual biomass. Challenges related to industrial-scale implementation, including process complexity and economic feasibility, are also addressed. Furthermore, the manuscript outlines strategies for integrating ZWV across the food supply chain and emphasizes its potential environmental benefits. By providing a comparative analysis of valorization levels and a focused discussion on zero-waste implementation in the context of FVW, this study contributes a comprehensive perspective that may guide future research and industrial applications in sustainable biomass management.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100300"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860268","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":"Understanding Millennials and Gen Z’s organic food buying intentions: A mediation and segmentation study","authors":"Peerzada Munaqib ,&nbsp;Mushtaq Ahmad Darzi ,&nbsp;Suhail Ahmad Bhat ,&nbsp;Sheikh Basharul Islam ,&nbsp;Nabila Mushtaq","doi":"10.1016/j.clwas.2025.100294","DOIUrl":"10.1016/j.clwas.2025.100294","url":null,"abstract":"<div><div>Addressing environmental crises requires a shift in consumer behaviour towards more ecologically friendly options. Practicing organic conduct may improve psychological health. However, the desire to purchase health-conscious and ecologically friendly foods is struggling to gain traction. The study investigates the determinants shaping Millennial and Gen Z consumers intention to purchase organic food and segment them into categories based on their consumption motivation. Data from 340 Indian consumers were gathered via a structured questionnaire using a purposive sampling technique. To analyze the conceptual model and validate the hypotheses, structured equation modelling was employed. Green attitude, subjective knowledge, health consciousness and environmental concern have significant positive influence on purchase intention. Moreover, the impact of environmental concern and health consciousness on purchase intention were significantly mediated by green attitude and subjective knowledge. This study is pioneering in examining the influence of health consciousness and environmental concern on subjective knowledge towards organic food and also in examining the mediating effect of subjective knowledge in the relationship between environmental concern, health consciousness and the purchase intention of Millennials and Gen Z consumers within the Indian milieu. Further, millennials and Gen Z consumers are segmented into preventive and therapeutic consumers.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100294"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860267","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":"Predictive modelling of mechanical properties of concrete using machine learning with secondary treated waste water and fly ash","authors":"Rajiv K.N. ,&nbsp;Ramalinga Reddy Y. ,&nbsp;Shiva Kumar G ,&nbsp;Ramaraju HK (Professor)","doi":"10.1016/j.clwas.2025.100296","DOIUrl":"10.1016/j.clwas.2025.100296","url":null,"abstract":"<div><div>This study investigates the utilization of secondary treated wastewater and fly ash in concrete production, focusing on modelling mechanical properties using machine learning models. Sixteen concrete mixtures were prepared with tap water and three types of secondary treated wastewater, varying the fly ash proportions (0 %, 10 %, 20 %, and 30 %). Workability, compressive strength, split tensile strength, and flexural strength were assessed for each mixture. Five machine learning models Linear Regression, LASSO Regression, Decision Tree Regression, Random Forest Regression, and Multi-Layer Perceptron were used to predict concrete's mechanical properties. The results show that M30 grade concrete can be effectively produced using secondary treated wastewater and fly ash, presenting a promising strategy for more sustainable concrete production by reducing freshwater usage and incorporating fly ash as a supplementary cementitious material. Notably, the Random Forest Regressor demonstrated superior prediction accuracy for compressive strength, outperforming the other models and proving to be an invaluable tool for optimizing concrete mix designs. Its ability to reliably predict concrete strength properties ensures higher accuracy in mix design formulation, which is critical for achieving desired performance while minimizing material waste. From a sustainability perspective, using secondary treated wastewater in concrete production significantly reduces the demand for freshwater, conserving this precious resource. Incorporating fly ash, a byproduct of coal combustion, not only enhances concrete properties but also helps divert industrial waste from landfills, reducing environmental impact. The application of machine learning models, especially the Random Forest Regressor, allows for more precise and efficient mix designs, further contributing to the sustainability of concrete production. This approach offers substantial environmental benefits by reducing water usage, promoting recycling of industrial byproducts, and improving the overall efficiency of concrete manufacturing processes.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100296"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873348","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":"Assessing the community knowledge on waste management practices, drinking water source systems, and the possible implications on public health systems","authors":"Joseph Omeiza Alao ,&nbsp;Oche Joseph Otorkpa ,&nbsp;Daniel A. Ayejoto ,&nbsp;Ahmed M. Saqr","doi":"10.1016/j.clwas.2025.100295","DOIUrl":"10.1016/j.clwas.2025.100295","url":null,"abstract":"<div><div>Assessing the waste management practices and drinking water source systems is essential for public health systems and the well-being of millions. However, inadequate integration of community knowledge into scientific research to effectively address environmental issues remains a great challenge. This study assessed the community knowledge on the prevalent waste management practices, drinking water source systems, and the potential associated health risks using a descriptive cross-sectional design utilizing diagnostic survey questionnaires (DSQs) and oral interviews (OIs) in villages, semi-urban, and urban areas. The study reveals that 92 % of villagers rely on potentially contaminated water sources, with 43 % drinking from open surface water and 49 % from hand-dug wells. Meanwhile, open defecation remains prevalent, with 52 % of villagers resorting to this practice. The situation worsens in urban areas, where 56 % of residents dispose of waste in open dumpsites/landfills, with no access to engineered landfills. Waste burning, a hazardous practice, is employed by 27 % of the population. The data show that 17 % of the population relies on surface water, 40 % on hand-dug wells, and 36 % on boreholes, with only 5.7 % accessing treated water. 56 % of waste is disposed of in open dumpsites/landfills, 27 % is burned, 9 % is indiscriminately dumped, and 7 % is dumped in water bodies. 18 % of the population defecates openly, 30 % use pit latrines, and 55 % rely on untreated water systems for defecation. This implies that combining community knowledge with scientific research to address environmental challenges is crucial. However, the attitude of the respondents towards waste management, drinking water sources and health risks accounts for a significant variation in respondents’ education. Effective implementation of waste management practices and provision of basic sewage infrastructural systems, coupled with adequate education, is required to protect drinking water sources, prevent pandemic diseases, and safeguard the national economy and health.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100295"},"PeriodicalIF":0.0,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855191","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":"Optimization of biogas production with rice straw-derived biochar: Characterization, hormetic effects, and kinetics modelling","authors":"Utibe A. Ofon ,&nbsp;Uduak U. Ndubuisi-Nnaji ,&nbsp;Godwin E. Udofia ,&nbsp;Anthony A. Adegoke ,&nbsp;E.E. Orji ,&nbsp;Mboutidem I. Ekaette ,&nbsp;Charity A. Ukot ,&nbsp;Nnanake-Abasi O. Offiong ,&nbsp;Dele P. Fapojuwo ,&nbsp;Solomon E. Shaibu","doi":"10.1016/j.clwas.2025.100288","DOIUrl":"10.1016/j.clwas.2025.100288","url":null,"abstract":"<div><div>One of the drawbacks of anaerobic digestion (AD) is the slow process startup. This study evaluated rice straw-derived biochar (RSB) to accelerate the anaerobic co-digestion of paper waste (PW) and chicken manure (CM). Rice straw pyrolyzed at 550°C (RSB550) was characterized by SEM, EDX, BET, FTIR, CEC, and CHN analyses before supplementation. Different doses (0, 2, 4, 6, and 10 % w/v) were tested in a batch system co-digesting PW and CM (2:1) under thermophilic conditions (45°C) for 44 days. RSB550 exhibited a surface area of 23.5 m²g⁻¹ , a pore volume of 0.1 cm³g⁻¹ , a pore size of 15.4 nm, and a CEC of 2.0 meq/100 g, favorable for AD. Biogas yield was dose-dependent and significant via ANOVA, with 2 % RSB550 increasing production by 31.74 % compared to the control. Excess biochar reduced yield. Modified Gompertz modeling fit well (R²: 0.995–0.999), confirming biochar as a promising strategy for enhancing AD efficiency.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100288"},"PeriodicalIF":0.0,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855196","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":"Environmental and resource sustainability: The question of demolition or conversion of old cattle sheds","authors":"Bosompem Ahunoabobirim Agya ,&nbsp;Portia Agyemang ,&nbsp;Kwame Anokye","doi":"10.1016/j.clwas.2025.100291","DOIUrl":"10.1016/j.clwas.2025.100291","url":null,"abstract":"<div><div>This study critically evaluates the sustainability of demolishing versus converting aging cattle sheds by synthesizing evidence from 23 peer-reviewed articles published between 2010 and 2025. Employing a rapid review methodology combined with life cycle assessment, circular economy principles, and the triple bottom line framework, the research compares the environmental, economic, and socio-cultural impacts of each approach. Findings reveal that adaptive reuse substantially lowers greenhouse gas emissions, waste generation, and energy consumption while preserving cultural heritage and delivering long-term economic benefits despite higher initial investments. The study highlights the need for targeted policy incentives and robust assessment methods to guide sustainable rural infrastructure management.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100291"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850138","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":"Future prospects towards attaining zero-emission of greenhouse gases from crude oil refinery plants","authors":"Lekan Taofeek Popoola ,&nbsp;Celestine Chidi Nwogbu ,&nbsp;Usman Taura ,&nbsp;Yuli Panca Asmara ,&nbsp;Lois Onyejere Nwobodo ,&nbsp;Alfred Ogbodo Agbo","doi":"10.1016/j.clwas.2025.100290","DOIUrl":"10.1016/j.clwas.2025.100290","url":null,"abstract":"<div><div>The contribution of greenhouse gas emissions from crude oil refineries to the global climate change has been so problematic. The end results of this has been linked to global warming causing adverse effects on public health and making the environment unsafe for living. This review article examines the challenges and effects emanating from the release of greenhouse gases from crude oil refining operations. In-depth discussions and salient points, shedding light for prospective researchers on the critical areas that should be investigated and improved on to attain net-zero emissions in refinery, were presented. The effects of the increase in the global number of refineries on GHG emissions trend in top countries are discussed. Top 10 countries and refinery industries with the highest GHG emissions were referenced as case studies. Between 2000 and 2021, the cumulative GHG emissions from refineries attained 34.1 Gt due to increase in the number of refineries while the top 10 enterprises accounted for approximately 33.8–38.1 %. Accumulative reduction of 532 Mt and 928 Mt of CO₂ emissions are expected between 2020 and 2030 if the efficiencies of refineries in the top 10 countries and global refineries are respectively improved. Technologies such as hydrogen-based refining and carbon capture, utilization, and storage (CCUS); integration of circular economy principles; green financing and government-backed incentives; and government-based policies are some of the steps that can be taken to make reduction of GHG emissions from refineries a reality. In conclusion, the stated vital points regarding future prospects towards attaining net-zero emissions from crude oil refinery plants will be beneficial for prospective researchers and the entire globe.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"11 ","pages":"Article 100290"},"PeriodicalIF":0.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844165","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}