Cleaner Waste Systems最新文献

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Systematic review of pistachio shell waste: Environmental applications, sustainable approaches, and nanotechnology insights
Cleaner Waste Systems Pub Date : 2025-01-27 DOI: 10.1016/j.clwas.2025.100219
Nastaran Marzban Panah Maklavani , Mahdi Maskani , Saeed karimi
{"title":"Systematic review of pistachio shell waste: Environmental applications, sustainable approaches, and nanotechnology insights","authors":"Nastaran Marzban Panah Maklavani ,&nbsp;Mahdi Maskani ,&nbsp;Saeed karimi","doi":"10.1016/j.clwas.2025.100219","DOIUrl":"10.1016/j.clwas.2025.100219","url":null,"abstract":"<div><div>Agricultural waste, particularly pistachio shells, represents a significant environmental challenge while offering immense untapped economic potential. Iran, as one of the largest pistachio producers globally, generates vast amounts of pistachio shell waste annually, with much of it improperly discarded. This practice contributes to severe soil and water pollution, highlighting the urgent need for sustainable waste management strategies.This study systematically investigates the bioactive properties of pistachio shells, emphasizing key compounds such as polyphenols, flavonoids, and antioxidants known for their anti-inflammatory, antibacterial, and antioxidant effects. Utilizing a structured review of peer-reviewed literature, advanced extraction methods, including supercritical fluid extraction (SFE) and ultrasonic-assisted extraction (UAE), were evaluated for their efficiency in recovering high-purity bioactive compounds while minimizing environmental impact.The findings reveal the transformative potential of these compounds in developing eco-friendly and sustainable cosmetic and personal care products, offering a natural alternative to synthetic chemicals. Additionally, the integration of nanotechnology is explored, showcasing its ability to enhance the efficacy, bioavailability, and stability of pistachio shell-derived products. This dual focus on advanced technologies and sustainable practices underscores the compatibility of pistachio shell utilization with global circular economy principles.By reducing agricultural waste and transforming it into high-value resources, this research provides a roadmap for achieving both environmental conservation and economic growth. It offers practical insights for researchers, policymakers, and industry leaders, emphasizing the critical role of innovative technologies in promoting sustainable development.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100219"},"PeriodicalIF":0.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163958","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}
引用次数: 0
Nanomaterials in asphalt pavements: A state-of-the-art review
Cleaner Waste Systems Pub Date : 2025-01-24 DOI: 10.1016/j.clwas.2025.100214
Abolfazl Afshin , Ali Behnood
{"title":"Nanomaterials in asphalt pavements: A state-of-the-art review","authors":"Abolfazl Afshin ,&nbsp;Ali Behnood","doi":"10.1016/j.clwas.2025.100214","DOIUrl":"10.1016/j.clwas.2025.100214","url":null,"abstract":"<div><div>This study adopts a systematic literature review approach to investigate the diverse applications of nanomaterials in asphalt pavement, marking the convergence of nanotechnology and asphalt pavement industry. Nanomaterials, characterized by their unique properties at the nanoscale, encompass a variety of materials, including nanoclay, nano-silica, carbon nanotubes, and nanofibers, and have gained increasing attention for their potential to revolutionize the asphalt industry. By incorporating nanomaterials, industry can achieve greener production processes, lower energy consumption, and promote the use of sustainable, recycled materials. A central focus of this review is the examination of how key properties of asphalt mixtures are influenced by nanomaterials, including mechanical characteristics such as stiffness, strength, and flexibility, as well as their role in enhancing resistance to common distress modes such as rutting, cracking, and moisture damage. Additionally, their impacts on temperature susceptibility and aging characteristics are explored. The mechanisms underpinning nanomaterial reinforcement in asphalt are elucidated, encompassing nanoparticle dispersion, interfacial bonding, and confinement effects. These mechanisms offer a deeper understanding of the science behind the improved performance. Environmental and sustainability considerations associated with the incorporation of nanomaterials into asphalt are addressed, including potential environmental risks and health implications. Emphasis is placed on sustainable practices, such as the use of recycled materials and energy-efficient production methods. This review underscores current challenges and limitations in the field and provides insights into the future directions of research and innovation. It envisions a roadmap for harnessing nanotechnology's transformative potential in asphalt pavement engineering.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100214"},"PeriodicalIF":0.0,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163959","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}
引用次数: 0
Generation characteristics and disposal paths of construction waste in public building project: A case study
Cleaner Waste Systems Pub Date : 2025-01-21 DOI: 10.1016/j.clwas.2025.100211
Huanyu Wu , Xiangyi Weng , Run Chen , Linwei Du , Yanqiu Li , Wenke Liu , Song Liu , Bo Yu , Zhikang Bao
{"title":"Generation characteristics and disposal paths of construction waste in public building project: A case study","authors":"Huanyu Wu ,&nbsp;Xiangyi Weng ,&nbsp;Run Chen ,&nbsp;Linwei Du ,&nbsp;Yanqiu Li ,&nbsp;Wenke Liu ,&nbsp;Song Liu ,&nbsp;Bo Yu ,&nbsp;Zhikang Bao","doi":"10.1016/j.clwas.2025.100211","DOIUrl":"10.1016/j.clwas.2025.100211","url":null,"abstract":"<div><div>In recent years, the substantial increase in construction waste (CW) has prompted academia to conduct in-depth research on CW management. Understanding generation characteristics, disposal paths, and corresponding economic benefits of CW is a prerequisite for effectively managing CW. Therefore, this study develops a method that includes a Construction Waste (CW) classification system and an economic benefits analysis model to investigate the characteristics of CW generation and analyze the economic benefits of disposal paths, respectively. Based on a case study of a public building construction project in Shenzhen, China, the results reveal that soil dregs (290.75 kg/m<sup>2</sup>), slurry (59.93 kg/m<sup>2</sup>), and concrete (15.53 kg/m<sup>2</sup>) are the major CW compositions generated. Various paths can be established regarding on-site and off-site comprehensive utilization and landfilling to dispose of CW, with on-site benefits about 9 times that of off-site comprehensive utilization. Therefore, on-site comprehensive utilization of CW is the most beneficial from the perspective of a ‘zero-waste construction site’. Based on the results, five CW reduction management strategies are developed: policy support, financial subsidies, modern construction methods, intelligent technology assistance, and on-site CW utilization. This study is not only valuable in obtaining nuanced quantitative CW data at the project level methodologically, but also in advancement of effectively managing CW from its generation to final disposal practically.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100211"},"PeriodicalIF":0.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163954","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}
引用次数: 0
Modelling the impact of shelf-life extension on fresh produce waste in UK homes
Cleaner Waste Systems Pub Date : 2025-01-17 DOI: 10.1016/j.clwas.2025.100210
Rachel Devine , Sarah Key , Ellie Trotman , Cansu Kandemir , Tom Quested , Christian Reynolds , SC Lenny Koh , Penny Huckle
{"title":"Modelling the impact of shelf-life extension on fresh produce waste in UK homes","authors":"Rachel Devine ,&nbsp;Sarah Key ,&nbsp;Ellie Trotman ,&nbsp;Cansu Kandemir ,&nbsp;Tom Quested ,&nbsp;Christian Reynolds ,&nbsp;SC Lenny Koh ,&nbsp;Penny Huckle","doi":"10.1016/j.clwas.2025.100210","DOIUrl":"10.1016/j.clwas.2025.100210","url":null,"abstract":"<div><div>This research uses the Household Simulation Model (HHSM), to assess shelf-life extension mechanisms for reducing fresh produce waste in UK homes. Removal of Best Before dates is the most effective mechanism, reducing waste by 8–28 percentage points depending on the product (e.g., for bananas, a modelled waste reduction from 24 % of purchases to 16 %, an 8 percentage-point reduction). The findings support current recommendations to remove Best Before dates on uncut fresh produce. Refrigerating apples at 4°C extends product shelf life from 31 to 108 days resulting in a modelled reduction of 2.5 percentage points from 3.1 % to 0.61 %. Storage at optimal fridge temperature (4°C compared to 9°C) shows a modelled waste reduction for cucumbers of 16 percentage points from 43 % to 27 %. However, both refrigeration mechanisms assume a major change in consumer behaviour which could be challenging to overcome. Edible bio-based coatings show a modelled reduction for oranges, satsumas, and avocados ranging from 3 to 12 percentage points, offering a high-reward, low-effort solution for reducing Household Food Waste (HHFW) with relatively low implementation costs. Plastic packaging removal varies by product with a 9-percentage point reduction for bananas, but no effect on apples and cucumber. Consumer behaviour and proportion of products sold packaged will substantially affect waste reductions. The broader impact of plastic packaging on food management practices is not fully considered in this study, so results should not inform policy decision-making. Whilst the findings are UK-specific, they offer insights for other countries, though country-specific data is recommended for policy decisions.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100210"},"PeriodicalIF":0.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164767","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}
引用次数: 0
Sustaining e-waste recycling behavior among young consumers to implement circular economy: An extended model of Theory of Reasoned Goal Pursuit
Cleaner Waste Systems Pub Date : 2025-01-17 DOI: 10.1016/j.clwas.2025.100212
Md Hasibul Islam , Md. Mahiuddin Sabbir , Mashnur Mahbub , Tamanna Tabassum Jhilik , Suchita Shirmin
{"title":"Sustaining e-waste recycling behavior among young consumers to implement circular economy: An extended model of Theory of Reasoned Goal Pursuit","authors":"Md Hasibul Islam ,&nbsp;Md. Mahiuddin Sabbir ,&nbsp;Mashnur Mahbub ,&nbsp;Tamanna Tabassum Jhilik ,&nbsp;Suchita Shirmin","doi":"10.1016/j.clwas.2025.100212","DOIUrl":"10.1016/j.clwas.2025.100212","url":null,"abstract":"<div><div>Despite extensive literature identifying various factors influencing consumers’ e-waste recycling behavior (EWRB), sustaining such behavior remains a challenge. This paper aims to explore how personal goals and motivation shape individuals’ EWRB. An extended model of the Theory of Reasoned Goal Pursuit (TRGP) was developed by integrating the Norm Activation Model (NAM) and Behavioral Reasoning Theory (BRT). Data was collected surveying young consumers in a developing country and analyzed using the structural equation modeling technique. The results show that motivation is the strongest immediate predictor of the intention to engage in EWRB, and it is significantly influenced by individuals’ active pro-environmental goal (APG) and active approval goal (AAG). The impact of APG on EWRB was found to be greater than that of AAG. Additionally, moral norm significantly influences APG, suggesting that it serves as a determinant of APG. The findings also indicate that when eco-awareness, sense of responsibility and moral norm collectively form APG, it exerts the more significant impact on EWRB. Furthermore, perceived risk was found to significantly moderate the relationship between intention and EWRB, widening the intention-behavior gap. This paper contributes by applying the TRGP in the context of EWRB and enhancing our understanding of how personal goals interact with other factors that influence EWRB. The paper also discusses the limitations of the TRGP and presents a novel extended TRGP model to address these limitations. From a practical perspective, this study offers valuable recommendations for practitioners on fostering sustainable EWRB among young consumers, supporting the implementation of circular economy at consumer level.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100212"},"PeriodicalIF":0.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164764","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}
引用次数: 0
Application of rice straw and corn straw compost for enhancing phosphorus availability in ultisol and corn plants
Cleaner Waste Systems Pub Date : 2025-01-16 DOI: 10.1016/j.clwas.2025.100213
Kasifah Kasifah , Muhammad Roil Bilad , Sumbangan Baja
{"title":"Application of rice straw and corn straw compost for enhancing phosphorus availability in ultisol and corn plants","authors":"Kasifah Kasifah ,&nbsp;Muhammad Roil Bilad ,&nbsp;Sumbangan Baja","doi":"10.1016/j.clwas.2025.100213","DOIUrl":"10.1016/j.clwas.2025.100213","url":null,"abstract":"<div><div>Ultisol, a widely distributed soil in tropical regions, remains underutilized in agriculture due to its inherently low phosphorus (P) availability, with substantial amounts bound in recalcitrant Al-P, Fe-P, and Ca-P fractions, limiting plant uptake. However, limited understanding exists regarding how different compost sources can more effectively mobilize these P fractions to enhance crop performance in field-relevant tropical conditions. This study addressed this problem by evaluating the efficacy of rice straw and corn stover composts in transforming these key P fractions into more available forms for corn (<em>Zea mays</em>) growth. A two-phase experimental design was employed, including a six-week soil incubation where Ultisol was amended at 20 tons/ha to assess shifts in Al-P, Fe-P, Ca-P, and available P, and a subsequent greenhouse experiment examining corn growth responses to varying compost rates (10, 20, 30 tons/ha). Compared to rice straw compost, corn stover compost, which contained higher levels of humic and fulvic acids, more effectively reduced P bound in Al-P, Fe-P, and Ca-P complexes by up to 67 %, thereby significantly enhancing P availability. These results align with previous findings on organic amendments but further demonstrate the pivotal role of higher humic and fulvic acid content in boosting P release from multiple soil-bound fractions. Enhanced P availability translated into improved crop performance, as evidenced by increased ear length, diameter, and grain weight. The implications of this study suggest a cost-effective and environmentally friendly approach to overcoming P limitations in acidic, highly weathered soils. Nonetheless, the greenhouse-scale scope represents a limitation, highlighting the need for longer-term field evaluations to assess broader impacts on soil health and nutrient cycling. These findings highlight that the superior capacity of corn stover compost to chelate metal ions, release bound P, and increase its bioavailability offers a sustainable strategy to overcome P limitation in Ultisol. Future research should explore multi-season field trials and in-depth microbial assessments of compost impacts on P dynamics, soil health, and crop resilience, ultimately optimizing sustainable soil management in tropical agriculture.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100213"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164766","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}
引用次数: 0
From waste to fertilizer: The impact of rose-waste compost on cut rose cultivation in Kenya
Cleaner Waste Systems Pub Date : 2025-01-15 DOI: 10.1016/j.clwas.2025.100208
E.A. de Nijs , R. Bol , R. Zuurbier , A. Tietema
{"title":"From waste to fertilizer: The impact of rose-waste compost on cut rose cultivation in Kenya","authors":"E.A. de Nijs ,&nbsp;R. Bol ,&nbsp;R. Zuurbier ,&nbsp;A. Tietema","doi":"10.1016/j.clwas.2025.100208","DOIUrl":"10.1016/j.clwas.2025.100208","url":null,"abstract":"<div><div>The impact of compost amendment on crop yield and quality in cut rose cultivation under large-scale commercial conditions was examined near Lake Naivasha, Kenya. The experiment, conducted between August 2022 and February 2024, involved over 7500 rose plants. Growers often hesitate to incorporate compost due to limited knowledge about its long-term effects on yield and quality, highlighting the importance of this research. Three mature rose-waste-based composts were incorporated into the soil prior to seedling planting: (i) pure rose waste compost, (ii) compost made of 80 % rose waste and 20 % tomato waste, and (iii) compost made of 90 % rose waste and 10 % mature compost. Standard fertigation was applied to all treatments, except for one additional treatment where fertigation was halved to evaluate compost as a fertilizer substitute. Crop performance was assessed through daily harvest records, cumulative yield analyses, and economic profitability based on auction prices. Soil and plant quality parameters were assessed every 3–6 months. Compost amendment combined with full fertigation increased the number of harvested stems by 3.2–4.7 % over 18 months. This resulted in an economical yield increase of approximately €22,000 per hectare ($9600 per acre) for the first 18 months of cultivation. The halved fertigation treatment yielded a comparable harvest to the control with fertigation only. Compost amendment improved soil organic matter content with ca. 30 % throughout the experiment and enhanced short-term nutrient availability, while facilitating long-term nutrient release without compromising vase life, stem length, or bud size. In conclusion, rose-waste compost significantly enhanced soil quality by e.g. increasing nutrient availability, which in turn enhanced crop performance during the growth phase of cut roses, with sustained differences thereafter. These findings underline the potential of compost amendment to sustainably close the cycle of resources within Kenyan rose cultivation, while boosting crop yields and improving soil health.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100208"},"PeriodicalIF":0.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163957","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}
引用次数: 0
Cultivation of indigenous Chlorococcum sp. in aquaculture wastewater under various light color and biomass harvesting using membrane filtration: A simultaneous wastewater treatment and biomass production
Cleaner Waste Systems Pub Date : 2025-01-14 DOI: 10.1016/j.clwas.2025.100209
Zubair Hashmi , Ibrahim Maina Idriss , Hussein Taha , Juliana Zaini , Muhammad Saifullah Abu Bakar , Rosnah Abdullah , Asep Bayu Dani Nandianto , Muhammad Roil Bilad
{"title":"Cultivation of indigenous Chlorococcum sp. in aquaculture wastewater under various light color and biomass harvesting using membrane filtration: A simultaneous wastewater treatment and biomass production","authors":"Zubair Hashmi ,&nbsp;Ibrahim Maina Idriss ,&nbsp;Hussein Taha ,&nbsp;Juliana Zaini ,&nbsp;Muhammad Saifullah Abu Bakar ,&nbsp;Rosnah Abdullah ,&nbsp;Asep Bayu Dani Nandianto ,&nbsp;Muhammad Roil Bilad","doi":"10.1016/j.clwas.2025.100209","DOIUrl":"10.1016/j.clwas.2025.100209","url":null,"abstract":"<div><div>This study investigates the potential of the microalga <em>Chlorococcum</em> sp. for treating real aquaculture wastewater under varying LED light spectra (red, blue, white, violet) and harvesting biomass using polyvinylidene fluoride (PVDF) membranes. Among the tested conditions, red light yielded superior results, achieving 100 % nitrogen removal, 98.77 % phosphorus removal, and 77.21 % COD reduction by the 15th day, alongside the highest biomass production (2.00 ± 0.14 g/L) with the lowest energy consumption (1.08 kWh). Blue light is the next most effective spectra for nutrient removal, while white and violet lights demonstrated moderate performance, consuming 1.80 kWh and 1.62 kWh, respectively. The PVDF membrane exhibited high harvesting efficiency, with flux declining to 125.6 Lm⁻²h⁻¹ at the fourth cycle due to fouling and a flux recovery ratio (FRR) of 1.463 ± 0.078. The operational cost of the peristaltic pump used for harvesting was low, at approximately $0.0965. These findings highlight the efficacy of optimizing light spectra for simultaneous aquaculture wastewater remediation and biomass production, coupled with membrane filtration technology for efficient biomass recovery. This study provides a framework for integrating microalgal cultivation into sustainable wastewater management systems.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100209"},"PeriodicalIF":0.0,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164878","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}
引用次数: 0
Acid leaching of blast furnace slag for enhanced zeolite synthesis
Cleaner Waste Systems Pub Date : 2025-01-13 DOI: 10.1016/j.clwas.2025.100207
Nhlanhla Nyembe, Yusuf M. Isa
{"title":"Acid leaching of blast furnace slag for enhanced zeolite synthesis","authors":"Nhlanhla Nyembe,&nbsp;Yusuf M. Isa","doi":"10.1016/j.clwas.2025.100207","DOIUrl":"10.1016/j.clwas.2025.100207","url":null,"abstract":"<div><div>The iron- and steelmaking industry generates a substantial amount of waste in the form of blast furnace slag (BFS). Previous studies have highlighted the potential of utilizing BFS, composed of SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub>, for synthesizing zeolitic materials. However, impurities such as Ca and Mg have been found to hinder the hydrothermal synthesis process by inhibiting zeolite crystallization. To address this, acid leaching of BFS has been proposed as a viable pretreatment method. However, the influence of acid-leaching conditions on the hydrothermal synthesis technique remains unclear. Therefore, the study aims to evaluate the effectiveness of leaching conditions in reducing Ca and Mg from BFS, thereby improving zeolite synthesis from BFS. The BFS under investigation contained significant amounts of SiO<sub>2</sub> (35.1 wt%), Al<sub>2</sub>O<sub>3</sub> (16.1 wt%), CaO (30.6 wt%) and MgO (10.5 wt%). The results revealed that the optimal leaching conditions were achieved at a solids concentration of 8 wt%, an HCl concentration of 3 mol/L, and a leaching time of 90 min. Under these conditions, Ca and Mg were successfully solubilized from BFS with a maximum leaching efficiency of 80.4 % and 71.1 %, respectively. X-ray diffraction analysis revealed the mineral phase in the BFS as akermanite, while the products derived from the raw slag and leached slag consisted of augite and zeolite ZSM-5, respectively. It was observed that acid leaching of BFS resulted in a transformation of the mineral phase to augite. The initial composition of CaO and MgO in the starting material significantly influenced the formation of zeolite ZSM-5 during the hydrothermal treatment. With reduced impurities, the leached slag demonstrated successful conversion into zeolite ZSM-5. However, the resultant crystals exhibited a distinctive ball-shaped morphology. The environmental impact of the acidic leachate was minimized by neutralization, ensuring safe disposal and enhancing the sustainability of the leaching process.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100207"},"PeriodicalIF":0.0,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164881","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}
引用次数: 0
Sustainable Herbo-foam concrete with soap nut and coco-peat: Properties and thermal modelling
Cleaner Waste Systems Pub Date : 2025-01-09 DOI: 10.1016/j.clwas.2024.100196
Lakshmi Parvathi, Dhanya Sathyan, R. Athira
{"title":"Sustainable Herbo-foam concrete with soap nut and coco-peat: Properties and thermal modelling","authors":"Lakshmi Parvathi,&nbsp;Dhanya Sathyan,&nbsp;R. Athira","doi":"10.1016/j.clwas.2024.100196","DOIUrl":"10.1016/j.clwas.2024.100196","url":null,"abstract":"<div><div>This study explores the benefits of foam concrete, focusing on its lightweight, workability, and thermal resistance, making it suitable for insulation and partition walls. Foam concrete was developed using synthetic and natural foaming agents, with sand replaced by treated coco-peat at 5 %, 7.5 %, and 10 %. Soap nut extract served as a natural foaming agent, and coco-peat was treated with 4 % NaOH for better compatibility. Results showed enhanced thermal insulation with coco-peat, reducing thermal conductivity and lowering interior temperatures by 3 K at 312.15 K external temperature. Sound absorption improved, particularly at 7.5 % and 10 % replacements, while 5 % replacement yielded the highest compressive strength of 19.18 MPa. Although water absorption increased due to coco-peat's properties, durability and acoustic performance improved. Analytical modeling with COMSOL Multiphysics validated these findings, emphasizing its potential in energy-efficient construction.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100196"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164877","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}
引用次数: 0
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