Cleaner Waste Systems最新文献_第2页

Effect of moral reasoning and fair labour concerns on sustainable clothing selection: An analysis of the moderating role of Twitter exposure 道德推理和公平劳动对可持续服装选择的影响：推特曝光的调节作用分析

IF 3.9

Cleaner Waste Systems

Pub Date : 2026-01-06 DOI: 10.1016/j.clwas.2026.100471

Gustavo Barrera-Verdugo, Daniel Durán-Sandoval

The high level of unsustainable clothing waste poses a significant threat to social and environmental sustainability in South America. University students constitute a segment of regular consumers of unsustainable clothing associated with fast fashion who are frequently exposed to social media. This study aims to enhance comprehension regarding personal factors influencing clothing consumption, by examining the impact of moral reasoning and labour conditions valuation on sustainable clothing selection, analysing the moderating effect of the frequency of reading and posting messages on Twitter. A total of 233 Chilean university students enrolled in business and engineering programmes completed an online self-report survey. The survey responses were analysed using Partial Least Squares Structural Equation Modelling and Multigroup Analysis. The results demonstrated that moral reasoning and appreciation of sustainable working conditions have a positive influence on sustainable clothing selection, such as choosing clothes made from organic materials and with labels that support the absence of pollutants. Notably, reading and posting messages on Twitter showed an important moderating effect on these proposed relationships. This empirical evidence validates the function of social media as a dynamic communication platform that has a significant influence on the selection of sustainable clothing. The present study provides evidence to support the need to improve moral education and highlights the importance of using social media platforms to promote sustainability among higher education students.

高水平的不可持续的服装废物对南美洲的社会和环境可持续性构成了重大威胁。大学生是经常消费与快时尚相关的不可持续服装的一部分，他们经常暴露在社交媒体上。本研究旨在通过考察道德推理和劳动条件评估对可持续服装选择的影响，分析在Twitter上阅读和发布消息的频率的调节作用，增强对影响服装消费的个人因素的理解。共有233名就读于商业和工程专业的智利大学生完成了一项在线自我报告调查。使用偏最小二乘结构方程模型和多组分析对调查结果进行分析。结果表明，道德推理和对可持续工作条件的欣赏对可持续服装的选择有积极影响，例如选择由有机材料制成的衣服，并标有支持不含污染物的标签。值得注意的是，在Twitter上阅读和发布消息对这些拟议的关系显示出重要的调节作用。这一实证证据验证了社交媒体作为动态交流平台的功能对可持续服装的选择有显著影响。本研究提供了证据来支持提高道德教育的必要性，并强调了使用社交媒体平台促进高等教育学生可持续性的重要性。

{"title":"Effect of moral reasoning and fair labour concerns on sustainable clothing selection: An analysis of the moderating role of Twitter exposure","authors":"Gustavo Barrera-Verdugo, Daniel Durán-Sandoval","doi":"10.1016/j.clwas.2026.100471","DOIUrl":"10.1016/j.clwas.2026.100471","url":null,"abstract":"<div><div>The high level of unsustainable clothing waste poses a significant threat to social and environmental sustainability in South America. University students constitute a segment of regular consumers of unsustainable clothing associated with fast fashion who are frequently exposed to social media. This study aims to enhance comprehension regarding personal factors influencing clothing consumption, by examining the impact of moral reasoning and labour conditions valuation on sustainable clothing selection, analysing the moderating effect of the frequency of reading and posting messages on Twitter. A total of 233 Chilean university students enrolled in business and engineering programmes completed an online self-report survey. The survey responses were analysed using Partial Least Squares Structural Equation Modelling and Multigroup Analysis. The results demonstrated that moral reasoning and appreciation of sustainable working conditions have a positive influence on sustainable clothing selection, such as choosing clothes made from organic materials and with labels that support the absence of pollutants. Notably, reading and posting messages on Twitter showed an important moderating effect on these proposed relationships. This empirical evidence validates the function of social media as a dynamic communication platform that has a significant influence on the selection of sustainable clothing. The present study provides evidence to support the need to improve moral education and highlights the importance of using social media platforms to promote sustainability among higher education students.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100471"},"PeriodicalIF":3.9,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976990","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}

引用次数: 0

"The role of technology, management skills, and policy capacity in enhancing enterprise catch-up performance: A comparative study" 技术、管理技能和政策能力在提高企业追赶绩效中的作用：比较研究

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-30 DOI: 10.1016/j.clwas.2025.100463

Biao Luo, Muhammad Hasan Makhdomzada

Technological catch-up is a complex process influenced through technology(TC), management skills(MS), market(MR) and policy capacity (PC). in enhancing enterprise CUP.

The research aims to understand how TC, MS, EN and PC jointly influence the CUP of latecomer enterprises. It seeks to bridge the gap in existing literature by examining the interplay of these factors across different institutional and industrial contexts.

A comparative study was conducted in China and South Korea, focusing on large and medium-sized manufacturing enterprises. 467 Data was collected through questionnaires distributed to participants (350 in China and 250 in South Korea), resulting in a response rate of approximately 91 %. The study employed PLS-SEM and Multi-Group Analysis (MGA) to test and analyze the hypotheses.

Employing PLS-SEM and MGA on a comparison sample of 467 manufacturing businesses from China and South Korea, the study reveals that TC substantially boosts MS, EN, MR, and PC. MS, EN, and MR consistently mediate the TC → CUP link in both nations, but PC considerably mediates TC → CUP in China, although not in South Korea, underscoring how governments vs market-driven institutional frameworks influence the efficacy of policy as a mechanism for technological advancement. The model demonstrates strong explanatory power (R² = 0.647).

This study combines the Resource-Based View (RBV) and Technology Catch-Up Theory (TCUT) into a multi-mediator paradigm that links firm-level dynamic resources to institutional catch-up channels. TC, MS, and EN are internal RBV resources, while MR and PC are contextual TCUT channels. This model provides insight into how technology investments lead to CUP and examines institutional context. These findings offer practical insights for managers and policymakers aiming to boost enterprise performance across varied economies.

技术追赶是一个复杂的过程，受到技术（TC）、管理技能（MS）、市场（MR）和政策能力（PC）的影响。提高企业CUP。本研究旨在了解TC、MS、EN和PC如何共同影响后发企业的CUP。它试图通过研究这些因素在不同制度和工业背景下的相互作用来弥合现有文献中的差距。本文以中韩两国大中型制造企业为研究对象，进行了对比研究。通过向参与者分发问卷（中国350人，韩国250人）收集数据，回复率约为91% %。本研究采用PLS-SEM和多组分析（MGA）对假设进行检验和分析。采用PLS-SEM和MGA对来自中国和韩国的467家制造企业的比较样本进行了研究，发现TC大幅提高了MS， EN， MR和PC。在这两个国家，MS、EN和MR一致地调解了技术转移→技术进步的联系，但PC在中国（尽管在韩国没有）显著地调解了技术转移→技术进步的联系，强调了政府与市场驱动的制度框架如何影响政策作为技术进步机制的效力。模型具有较强的解释力（R²= 0.647）。本研究将资源基础观（RBV）和技术追赶理论（TCUT）结合成一个多中介范式，将企业层面的动态资源与制度追赶渠道联系起来。TC、MS和EN是RBV内部资源，而MR和PC是上下文TCUT通道。该模型提供了对技术投资如何导致CUP的洞察，并检查了制度背景。这些发现为旨在提高不同经济体企业绩效的管理者和政策制定者提供了实用的见解。

{"title":"\"The role of technology, management skills, and policy capacity in enhancing enterprise catch-up performance: A comparative study\"","authors":"Biao Luo, Muhammad Hasan Makhdomzada","doi":"10.1016/j.clwas.2025.100463","DOIUrl":"10.1016/j.clwas.2025.100463","url":null,"abstract":"<div><div>Technological catch-up is a complex process influenced through technology(TC), management skills(MS), market(MR) and policy capacity (PC). in enhancing enterprise CUP.</div><div>The research aims to understand how TC, MS, EN and PC jointly influence the CUP of latecomer enterprises. It seeks to bridge the gap in existing literature by examining the interplay of these factors across different institutional and industrial contexts.</div><div>A comparative study was conducted in China and South Korea, focusing on large and medium-sized manufacturing enterprises. 467 Data was collected through questionnaires distributed to participants (350 in China and 250 in South Korea), resulting in a response rate of approximately 91 %. The study employed PLS-SEM and Multi-Group Analysis (MGA) to test and analyze the hypotheses.</div><div>Employing PLS-SEM and MGA on a comparison sample of 467 manufacturing businesses from China and South Korea, the study reveals that TC substantially boosts MS, EN, MR, and PC. MS, EN, and MR consistently mediate the TC → CUP link in both nations, but PC considerably mediates TC → CUP in China, although not in South Korea, underscoring how governments vs market-driven institutional frameworks influence the efficacy of policy as a mechanism for technological advancement. The model demonstrates strong explanatory power (R² = 0.647).</div><div>This study combines the Resource-Based View (RBV) and Technology Catch-Up Theory (TCUT) into a multi-mediator paradigm that links firm-level dynamic resources to institutional catch-up channels. TC, MS, and EN are internal RBV resources, while MR and PC are contextual TCUT channels. This model provides insight into how technology investments lead to CUP and examines institutional context. These findings offer practical insights for managers and policymakers aiming to boost enterprise performance across varied economies.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100463"},"PeriodicalIF":3.9,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077751","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}

引用次数: 0

Experimental evaluation of the Nano glass effect on the mortar's behavior: Durability, water penetration and bond strength 纳米玻璃对砂浆性能影响的实验评价：耐久性、透水性和粘结强度

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-23 DOI: 10.1016/j.clwas.2025.100465

Bilal Kamal Mohammed , Rafah Rasheed Abdulmajeed , Hawdin Ismael Ibrahim , Hersh F. Mahmood , Bzhar Muheddin Mohammed , Twana Othman M. Amin , Soran Abdrahman Ahmad

The negative effect of using cement in the concrete and mortar on the environment through the energy usage, waste clinker, high rate of carbon dioxide gas emission to the environment, make the investigation for finding new material to be used as replacement or partially replacement of cement very necessary for saving Environment and community. One of the new fields that consider as the daily topics for the researchers is the usage of nano materials, which make the used materials higher reactive compare to the powder size. Obtaining Nano material from solid wastes in the land that has pozzolanic ability will be twice advantage. This study examines nano glass powder as a partial cement replacement in mortar across eight mix ratios (0–50 %), focusing on durability, bond strength, and water penetration. Results show that nano glass improves bond strength with masonry units, though optimal content varies by type. At 15 % replacement, chloride resistance increased significantly, reducing charge passed by 40 %. Electrical conductivity dropped at lower replacement levels, reaching a minimum at 15 %, indicating better durability through reduced ionic movement. Water penetration depth decreased consistently, with an 85.7 % reduction at 50 % replacement. Based on findings, incorporating up to 10 % nano glass in mortar offers the best combination of durability and bonding performance, especially for plastering or masonry joint applications.

在混凝土和砂浆中使用水泥对环境的负面影响，通过能源消耗，废渣熟料，高二氧化碳气体排放到环境中，使得寻找替代或部分替代水泥的新材料的研究对于节约环境和社区是非常必要的。纳米材料的使用是研究人员日常关注的一个新领域，它使所用材料的反应性比粉末尺寸高。从具有火山灰能力的土地上的固体废物中获取纳米材料将具有双重优势。本研究考察了纳米玻璃粉作为砂浆中部分水泥替代品的8种混合比例（0-50 %），重点关注耐久性、粘结强度和水渗透性。结果表明，纳米玻璃可以提高砌体单元的粘结强度，但最佳含量因类型而异。在置换率为15% %时，氯离子电阻显著提高，通过的电荷减少了40% %。电导率在较低的更换水平下下降，达到最小值15% %，表明通过减少离子运动具有更好的耐久性。水侵深度持续下降，当替代量达到50% %时，水侵深度降低了85.7 %。根据研究结果，在砂浆中加入高达10% %的纳米玻璃，可提供耐久性和粘合性能的最佳组合，特别是用于抹灰或砌筑接缝应用。

{"title":"Experimental evaluation of the Nano glass effect on the mortar's behavior: Durability, water penetration and bond strength","authors":"Bilal Kamal Mohammed , Rafah Rasheed Abdulmajeed , Hawdin Ismael Ibrahim , Hersh F. Mahmood , Bzhar Muheddin Mohammed , Twana Othman M. Amin , Soran Abdrahman Ahmad","doi":"10.1016/j.clwas.2025.100465","DOIUrl":"10.1016/j.clwas.2025.100465","url":null,"abstract":"<div><div>The negative effect of using cement in the concrete and mortar on the environment through the energy usage, waste clinker, high rate of carbon dioxide gas emission to the environment, make the investigation for finding new material to be used as replacement or partially replacement of cement very necessary for saving Environment and community. One of the new fields that consider as the daily topics for the researchers is the usage of nano materials, which make the used materials higher reactive compare to the powder size. Obtaining Nano material from solid wastes in the land that has pozzolanic ability will be twice advantage. This study examines nano glass powder as a partial cement replacement in mortar across eight mix ratios (0–50 %), focusing on durability, bond strength, and water penetration. Results show that nano glass improves bond strength with masonry units, though optimal content varies by type. At 15 % replacement, chloride resistance increased significantly, reducing charge passed by 40 %. Electrical conductivity dropped at lower replacement levels, reaching a minimum at 15 %, indicating better durability through reduced ionic movement. Water penetration depth decreased consistently, with an 85.7 % reduction at 50 % replacement. Based on findings, incorporating up to 10 % nano glass in mortar offers the best combination of durability and bonding performance, especially for plastering or masonry joint applications.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100465"},"PeriodicalIF":3.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145926386","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}

引用次数: 0

Regulating food waste in bangladesh’s food manufacturing sector: Comparative and theoretical insights from the United States and the European Union 规范孟加拉国食品制造业的食物浪费：来自美国和欧盟的比较和理论见解

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-21 DOI: 10.1016/j.clwas.2025.100466

Abu Noman Mohammad Atahar Ali

This paper examines the regulation of food waste within the food manufacturing and processing sector in Bangladesh, with a focus on its alignment with global sustainability objectives. Approximately one-fifth of the food intended for human consumption is either wasted or lost globally, resulting in significant economic, ecological, and societal impacts. This research intends to establish a regulatory framework that is contextually relevant and rooted in theory, specifically for Bangladesh. The study adopts a qualitative and comparative research methodology, employing both documentary and doctrinal analysis. It extensively investigates core legal materials, such as laws, policies, and regulatory systems, complemented by secondary literature, including academic research, institutional documentation, and statistics from the Food and Agriculture Organization, the United Nations Environment Programme, the World Food Programme, and national governmental organizations. The comparative analysis highlights the regulatory strategies of the United States and the European Union, where consumer-focused regulations, financial incentives, and public-private collaborations have been successful, in contrast to Bangladesh’s fragmented regulatory regime. The study is grounded in theoretical perspectives derived from Command-and-Control Theory, Economic Incentive Theory, Game Theory, and Responsive Regulation Theory to inform the interpretation of the results. The findings indicate that Bangladesh lacks a cohesive framework for addressing food waste as a distinct regulatory issue. This paper advocates for a comprehensive legal framework that incorporates global best practices and strategies tailored to local conditions, in line with the Sustainable Development Goals.

本文考察了孟加拉国食品制造和加工部门对食品浪费的监管，重点关注其与全球可持续发展目标的一致性。在全球范围内，供人类消费的食物中约有五分之一被浪费或损失，造成重大的经济、生态和社会影响。这项研究旨在建立一个与环境相关并植根于理论的监管框架，特别是针对孟加拉国。本研究采用定性和比较研究的方法，采用文献和理论分析。它广泛调查核心法律材料，如法律、政策和监管制度，并辅以二手文献，包括学术研究、机构文件和来自粮食及农业组织、联合国环境规划署、世界粮食计划署和国家政府组织的统计数据。对比分析强调了美国和欧盟的监管策略，这两个国家以消费者为中心的监管、财政激励和公私合作都取得了成功，而孟加拉国的监管制度则是支离破碎的。本研究基于命令控制理论、经济激励理论、博弈论和响应性监管理论的理论视角来解释研究结果。研究结果表明，孟加拉国缺乏一个将食物浪费作为一个明确的监管问题来解决的有凝聚力的框架。本文主张建立一个全面的法律框架，结合全球最佳实践和因地制宜的战略，符合可持续发展目标。

{"title":"Regulating food waste in bangladesh’s food manufacturing sector: Comparative and theoretical insights from the United States and the European Union","authors":"Abu Noman Mohammad Atahar Ali","doi":"10.1016/j.clwas.2025.100466","DOIUrl":"10.1016/j.clwas.2025.100466","url":null,"abstract":"<div><div>This paper examines the regulation of food waste within the food manufacturing and processing sector in Bangladesh, with a focus on its alignment with global sustainability objectives. Approximately one-fifth of the food intended for human consumption is either wasted or lost globally, resulting in significant economic, ecological, and societal impacts. This research intends to establish a regulatory framework that is contextually relevant and rooted in theory, specifically for Bangladesh. The study adopts a qualitative and comparative research methodology, employing both documentary and doctrinal analysis. It extensively investigates core legal materials, such as laws, policies, and regulatory systems, complemented by secondary literature, including academic research, institutional documentation, and statistics from the Food and Agriculture Organization, the United Nations Environment Programme, the World Food Programme, and national governmental organizations. The comparative analysis highlights the regulatory strategies of the United States and the European Union, where consumer-focused regulations, financial incentives, and public-private collaborations have been successful, in contrast to Bangladesh’s fragmented regulatory regime. The study is grounded in theoretical perspectives derived from Command-and-Control Theory, Economic Incentive Theory, Game Theory, and Responsive Regulation Theory to inform the interpretation of the results. The findings indicate that Bangladesh lacks a cohesive framework for addressing food waste as a distinct regulatory issue. This paper advocates for a comprehensive legal framework that incorporates global best practices and strategies tailored to local conditions, in line with the Sustainable Development Goals.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100466"},"PeriodicalIF":3.9,"publicationDate":"2025-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145926389","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}

引用次数: 0

Transitioning to formalise E-waste urban mining practices: Resistance to change perspective 向正规化电子废物城市采矿实践过渡：对改变观点的抵制

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-17 DOI: 10.1016/j.clwas.2025.100460

Amila Kasun Sampath Udage Kankanamge , Michael Odei Erdiaw-Kwasie , Matthew Abunyewah

The informal e-waste sector in developing countries has evolved into a critical yet hazardous component of urban resource recovery, characterised by low-tech, unsafe, and environmentally damaging practices. Although governments increasingly promote formalisation, little is known about the micro-level resistance factors that shape informal sector employees’ reluctance to transition. This study addresses this gap by exploring the micro-level factors from the owners' and supervisors' perspectives which influence formalisation in Sri Lanka’s informal e-waste urban mining sector practices. Drawing on 27 semi-structured interviews and two focus group discussions, the analysis reveals cognitive, affective, leadership, and behavioural factors that shape informal sector employees’ reluctance to transition. These interlinked factors create a self-reinforcing system that sustains informality despite clear environmental, health and economic risks. Grounded in the Resistance to Change (RTC) perspective, the study offers the first empirical examination of micro-level resistance in this context and introduces the Resistance to Change framework that explains how such resistance shapes formalisation trajectories. The findings advance current theoretical debates and provide actionable insights to support policy reforms aligned with Sri Lanka’s National Policy on Waste Management.

发展中国家的非正式电子废物部门已经发展成为城市资源回收的一个关键但危险的组成部分，其特点是低技术、不安全和破坏环境的做法。尽管政府越来越多地推动正规化，但人们对造成非正规部门雇员不愿转型的微观阻力因素知之甚少。本研究通过从所有者和管理者的角度探讨影响斯里兰卡非正式电子废物城市采矿部门实践正规化的微观因素，解决了这一差距。通过27次半结构化访谈和两次焦点小组讨论，该分析揭示了影响非正式部门员工不愿转型的认知、情感、领导力和行为因素。这些相互关联的因素创造了一个自我强化的系统，尽管存在明显的环境、健康和经济风险，但仍能维持非正式性。基于变革阻力（RTC）的观点，该研究首次在此背景下对微观层面的阻力进行了实证检验，并引入了变革阻力框架，该框架解释了这种阻力如何塑造形式化轨迹。研究结果推动了当前的理论辩论，并提供了可操作的见解，以支持与斯里兰卡国家废物管理政策相一致的政策改革。

{"title":"Transitioning to formalise E-waste urban mining practices: Resistance to change perspective","authors":"Amila Kasun Sampath Udage Kankanamge , Michael Odei Erdiaw-Kwasie , Matthew Abunyewah","doi":"10.1016/j.clwas.2025.100460","DOIUrl":"10.1016/j.clwas.2025.100460","url":null,"abstract":"<div><div>The informal e-waste sector in developing countries has evolved into a critical yet hazardous component of urban resource recovery, characterised by low-tech, unsafe, and environmentally damaging practices. Although governments increasingly promote formalisation, little is known about the micro-level resistance factors that shape informal sector employees’ reluctance to transition. This study addresses this gap by exploring the micro-level factors from the owners' and supervisors' perspectives which influence formalisation in Sri Lanka’s informal e-waste urban mining sector practices. Drawing on 27 semi-structured interviews and two focus group discussions, the analysis reveals cognitive, affective, leadership, and behavioural factors that shape informal sector employees’ reluctance to transition. These interlinked factors create a self-reinforcing system that sustains informality despite clear environmental, health and economic risks. Grounded in the Resistance to Change (RTC) perspective, the study offers the first empirical examination of micro-level resistance in this context and introduces the Resistance to Change framework that explains how such resistance shapes formalisation trajectories. The findings advance current theoretical debates and provide actionable insights to support policy reforms aligned with Sri Lanka’s National Policy on Waste Management.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100460"},"PeriodicalIF":3.9,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798530","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}

引用次数: 0

Seasonal analysis of pollutants in Leachate and downstream river water of Banchare Danda and Sisdol landfill sites 班查雷、丹达和西斯多垃圾填埋场渗滤液和下游河水污染物的季节分析

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-17 DOI: 10.1016/j.clwas.2025.100464

Saroj Babu Koirala , Ramesh Gautam , Sujan Chaudhary , Shristi Khand , Laxmi Dhungana , Rashika Pandit , Reema Lama Pakhrin , Rachna Jha , Yubraj Dahal

The direct discharge of leachate into the water bodies severely affects the aquatic ecosystems, nearby agricultural areas, and thus poses a serious threat to human and environmental health. Major landfills in Nepal are also suffering from such threats due to the lack of proper leachate management practices. Thus, this study aims to analyze the status of physicochemical contaminants in the leachate of Banchare and Sisdol landfills, along with the water of the downstream river. The variation of pollutants was also evaluated in two distinct seasons, viz., pre-monsoon and monsoon. As a result, pre-monsoon samples recorded a more acidic pH with higher conductivity compared to the monsoon samples. From the Principal Component Analysis (PCA) within the variation of 94.6 %, the heavy metal contaminations were more severe in the Banchare Field (BF) and Sisdol Field (SF) sampling sites. Detectable amounts of heavy metals with higher values compared to control were also reported in the Banchare Downstream River (BW) and Sisdol Downstream River (SW) sites, such as Zinc (2.48 mg/L in BW and 1.94 mg/L in SW), Cadmium (only detected with 0.01 mg/L in BW), Iron (1.29 mg/L in SW and 1.04 mg/L in BW), and Copper (0.06 mg/L in SW and 0.04 mg/L in BW). The PCA also supported this result by providing the cluster of heavy metals in the BW and SW sites. The concentrations of most of the heavy metals in leachate were above the FAO guidelines for irrigation water during pre-monsoon, raising serious concerns regarding the proper leachate management in both landfills. To prevent the deterioration of nearby water, the installation of leachate treatment systems in Banchare and proper post-closure management in Sisdol is urgent.

渗滤液直接排入水体严重影响了水生生态系统和附近农业区，从而对人类和环境健康构成严重威胁。由于缺乏适当的渗滤液管理措施，尼泊尔的主要垃圾填埋场也受到这种威胁。因此，本研究旨在分析Banchare和Sisdol垃圾填埋场渗滤液中理化污染物的状况，以及下游河流的水。污染物的变化也在两个不同的季节，即季风前和季风进行了评估。因此，与季风样品相比，季风前样品记录了更酸性的pH值和更高的电导率。主成分分析（PCA）在94.6 %的变异范围内，表明班查尔区（BF）和西斯多区（SF）采样点重金属污染较为严重。Banchare下游河流（BW）和Sisdol下游河流（SW）站点的重金属检测值也高于对照，如锌（BW中为2.48 mg/L， SW中为1.94 mg/L），镉（BW中仅检测到0.01 mg/L），铁（SW中为1.29 mg/L， BW中为1.04 mg/L）和铜（SW中为0.06 mg/L， BW中为0.04 mg/L）。主成分分析还通过提供BW和SW站点的重金属簇来支持这一结果。渗滤液中大部分重金属的浓度都超过了粮农组织关于雨季前灌溉用水的准则，这引起了人们对两个填埋场的渗滤液适当管理的严重关切。为防止附近水质恶化，迫切需要在班哈尔安装渗滤液处理系统，并在西斯多尔安装适当的关闭后管理系统。

{"title":"Seasonal analysis of pollutants in Leachate and downstream river water of Banchare Danda and Sisdol landfill sites","authors":"Saroj Babu Koirala , Ramesh Gautam , Sujan Chaudhary , Shristi Khand , Laxmi Dhungana , Rashika Pandit , Reema Lama Pakhrin , Rachna Jha , Yubraj Dahal","doi":"10.1016/j.clwas.2025.100464","DOIUrl":"10.1016/j.clwas.2025.100464","url":null,"abstract":"<div><div>The direct discharge of leachate into the water bodies severely affects the aquatic ecosystems, nearby agricultural areas, and thus poses a serious threat to human and environmental health. Major landfills in Nepal are also suffering from such threats due to the lack of proper leachate management practices. Thus, this study aims to analyze the status of physicochemical contaminants in the leachate of Banchare and Sisdol landfills, along with the water of the downstream river. The variation of pollutants was also evaluated in two distinct seasons, viz., pre-monsoon and monsoon. As a result, pre-monsoon samples recorded a more acidic pH with higher conductivity compared to the monsoon samples. From the Principal Component Analysis (PCA) within the variation of 94.6 %, the heavy metal contaminations were more severe in the Banchare Field (BF) and Sisdol Field (SF) sampling sites. Detectable amounts of heavy metals with higher values compared to control were also reported in the Banchare Downstream River (BW) and Sisdol Downstream River (SW) sites, such as Zinc (2.48 mg/L in BW and 1.94 mg/L in SW), Cadmium (only detected with 0.01 mg/L in BW), Iron (1.29 mg/L in SW and 1.04 mg/L in BW), and Copper (0.06 mg/L in SW and 0.04 mg/L in BW). The PCA also supported this result by providing the cluster of heavy metals in the BW and SW sites. The concentrations of most of the heavy metals in leachate were above the FAO guidelines for irrigation water during pre-monsoon, raising serious concerns regarding the proper leachate management in both landfills. To prevent the deterioration of nearby water, the installation of leachate treatment systems in Banchare and proper post-closure management in Sisdol is urgent.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100464"},"PeriodicalIF":3.9,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145926388","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}

引用次数: 0

Valorization of recycled GFRP fibers and flakes from decommissioned boats in concrete: Effects on mechanical and microstructural properties 退役船只回收的玻璃钢纤维和薄片在混凝土中的增值：对机械和微观结构性能的影响

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-16 DOI: 10.1016/j.clwas.2025.100462

Edbert R. Lumbantobing, Mitsuyasu Iwanami

The widespread use of glass fiber-reinforced polymer (GFRP) across various industries, including boat construction, has resulted in significant waste accumulation. This study expands the application of recycled GFRP in concrete to include flakes, a form not previously explored, alongside fibers. By investigating fibers, flakes, and a hybrid fiber-flake group, this study aims to increase the usable fraction of recycled GFRP in concrete. The effects of recycled GFRP from decommissioned boat hulls on the compressive strength, modulus of elasticity, and splitting tensile strength of concrete were evaluated. Microstructural characteristics were analyzed using mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Incorporating recycled GFRP fibers or hybrid fiber-flake particles enhanced the compressive and splitting tensile strengths of concrete due to fiber bridging, whereas the use of flakes reduced these properties because their geometry and surface characteristics limit effective bonding. At a 2 % volume fraction, fibers increased compressive strength, modulus of elasticity, and splitting tensile strength by 17.8 %, 6.4 %, and 21.6 %, while flakes decreased these properties by 5.5 %, 4.2 %, and 8.4 %, respectively. MIP results showed that flake incorporation led to higher total pore volume and coarser pore structures, consistent with the interfacial defects leading to weaker bonding observed in SEM images, which together explain the reduction in mechanical performance. Although flakes reduced performance, the hybrid group indicated that combining fibers and flakes could accommodate higher recycled GFRP volumes and support more effective and sustainable recycling applications in concrete.

玻璃纤维增强聚合物（GFRP）在包括造船在内的各个行业的广泛使用导致了大量废物的积累。这项研究扩大了再生玻璃钢在混凝土中的应用，包括薄片，一种以前没有探索过的形式，以及纤维。通过研究纤维、薄片和混合纤维薄片组，本研究旨在提高再生玻璃钢在混凝土中的可用比例。研究了退役船体再生玻璃钢对混凝土抗压强度、弹性模量和劈裂抗拉强度的影响。采用压汞孔隙度法（MIP）、扫描电镜（SEM）和x射线衍射（XRD）分析了样品的微观结构特征。由于纤维桥接，结合再生玻璃钢纤维或混合纤维片状颗粒增强了混凝土的抗压和劈裂抗拉强度，而薄片的使用降低了这些性能，因为它们的几何形状和表面特性限制了有效的粘合。当体积分数为2 %时，纤维的抗压强度、弹性模量和劈裂抗拉强度分别提高了17.8 %、6.4 %和21.6 %，而薄片的这些性能分别降低了5.5 %、4.2 %和8.4 %。MIP结果表明，薄片的掺入导致总孔隙体积增大，孔隙结构更粗，这与SEM图像中观察到的界面缺陷导致较弱的结合一致，这两者共同解释了力学性能的降低。虽然薄片降低了性能，但混合组表明，纤维和薄片的结合可以容纳更高的GFRP回收体积，并支持更有效和可持续的混凝土回收应用。

{"title":"Valorization of recycled GFRP fibers and flakes from decommissioned boats in concrete: Effects on mechanical and microstructural properties","authors":"Edbert R. Lumbantobing, Mitsuyasu Iwanami","doi":"10.1016/j.clwas.2025.100462","DOIUrl":"10.1016/j.clwas.2025.100462","url":null,"abstract":"<div><div>The widespread use of glass fiber-reinforced polymer (GFRP) across various industries, including boat construction, has resulted in significant waste accumulation. This study expands the application of recycled GFRP in concrete to include flakes, a form not previously explored, alongside fibers. By investigating fibers, flakes, and a hybrid fiber-flake group, this study aims to increase the usable fraction of recycled GFRP in concrete. The effects of recycled GFRP from decommissioned boat hulls on the compressive strength, modulus of elasticity, and splitting tensile strength of concrete were evaluated. Microstructural characteristics were analyzed using mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Incorporating recycled GFRP fibers or hybrid fiber-flake particles enhanced the compressive and splitting tensile strengths of concrete due to fiber bridging, whereas the use of flakes reduced these properties because their geometry and surface characteristics limit effective bonding. At a 2 % volume fraction, fibers increased compressive strength, modulus of elasticity, and splitting tensile strength by 17.8 %, 6.4 %, and 21.6 %, while flakes decreased these properties by 5.5 %, 4.2 %, and 8.4 %, respectively. MIP results showed that flake incorporation led to higher total pore volume and coarser pore structures, consistent with the interfacial defects leading to weaker bonding observed in SEM images, which together explain the reduction in mechanical performance. Although flakes reduced performance, the hybrid group indicated that combining fibers and flakes could accommodate higher recycled GFRP volumes and support more effective and sustainable recycling applications in concrete.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100462"},"PeriodicalIF":3.9,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798531","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}

引用次数: 0

Social pathways vs. personal attitudes: Modeling sustainable consumption in an emerging collectivist economy 社会途径与个人态度：新兴集体主义经济中可持续消费的建模

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-13 DOI: 10.1016/j.clwas.2025.100461

Archie Anh Pham , Ly N. Pham , Quynh M. Nguyen , Khue M. Nguyen , Huong T. Dam , Tra T.H. Le

Sustainable consumption research is largely dominated by Western-centric models that emphasize individual attitudes. However, a critical gap remains in understanding how these models apply to emerging collectivist economies where social norms often override individual preferences. This study bridges this gap by exploring reusable shopping bag consumption among Vietnamese youth, a key demographic in a rapidly developing, collectivist society. Integrating Value-Belief-Norm (VBN) and Consumer Socialization (TCS) theories, we surveyed 343 young consumers in Hanoi, analyzing the data with structural equation modeling (SEM). Results reveal a sharp divergence between attitudinal and behavioral pathways. While internal factors (biospheric values, objective knowledge) positively shape attitudes, actual consumption behavior is not driven by attitudes. Instead, it is directly and strongly predicted by external social factors (namely, peer and family communication). Furthermore, willingness to pay (WTP) is a significant negative moderator of the attitude-behavior link, suggesting WTP may reflect status-seeking motives that decouple behavior from personal environmental values. Our findings contribute a culturally specific model where social pathways override individual attitudes, offering critical implications for policymakers and marketers to shift from awareness campaigns toward leveraging peer networks to drive tangible change.

可持续消费研究在很大程度上由强调个人态度的以西方为中心的模型主导。然而，在理解这些模型如何适用于新兴的集体主义经济体方面，仍然存在一个关键的差距，在这些经济体中，社会规范往往凌驾于个人偏好之上。这项研究通过探索越南青年的可重复使用购物袋消费来弥补这一差距，越南青年是一个快速发展的集体主义社会的关键人口。结合价值信念规范（Value-Belief-Norm， VBN）和消费者社会化（Consumer社会化，TCS）理论，我们对河内市343名年轻消费者进行了调查，并运用结构方程模型（SEM）对数据进行了分析。结果揭示了态度和行为途径之间的明显差异。虽然内部因素（生物圈价值，客观知识）积极塑造态度，但实际消费行为并不受态度的驱动。相反，它是由外部社会因素（即同伴和家庭交流）直接和强烈地预测的。此外，支付意愿（WTP）是态度-行为联系的显著负向调节因子，表明WTP可能反映了将行为与个人环境价值脱钩的地位寻求动机。我们的研究结果提供了一个文化特定模型，其中社会途径超越个人态度，为政策制定者和营销人员从意识运动转向利用同伴网络来推动切实的变化提供了重要的启示。

{"title":"Social pathways vs. personal attitudes: Modeling sustainable consumption in an emerging collectivist economy","authors":"Archie Anh Pham , Ly N. Pham , Quynh M. Nguyen , Khue M. Nguyen , Huong T. Dam , Tra T.H. Le","doi":"10.1016/j.clwas.2025.100461","DOIUrl":"10.1016/j.clwas.2025.100461","url":null,"abstract":"<div><div>Sustainable consumption research is largely dominated by Western-centric models that emphasize individual attitudes. However, a critical gap remains in understanding how these models apply to emerging collectivist economies where social norms often override individual preferences. This study bridges this gap by exploring reusable shopping bag consumption among Vietnamese youth, a key demographic in a rapidly developing, collectivist society. Integrating Value-Belief-Norm (VBN) and Consumer Socialization (TCS) theories, we surveyed 343 young consumers in Hanoi, analyzing the data with structural equation modeling (SEM). Results reveal a sharp divergence between attitudinal and behavioral pathways. While internal factors (biospheric values, objective knowledge) positively shape attitudes, actual consumption behavior is not driven by attitudes. Instead, it is directly and strongly predicted by external social factors (namely, peer and family communication). Furthermore, willingness to pay (WTP) is a significant negative moderator of the attitude-behavior link, suggesting WTP may reflect status-seeking motives that decouple behavior from personal environmental values. Our findings contribute a culturally specific model where social pathways override individual attitudes, offering critical implications for policymakers and marketers to shift from awareness campaigns toward leveraging peer networks to drive tangible change.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100461"},"PeriodicalIF":3.9,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798526","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}

引用次数: 0

Characterization and performance analysis of leather trimming waste incorporated graphene-based composite (UPR-GO-LTW) for the removal of dye from aquatic media: A waste valorization approach 含石墨烯基复合材料（UPR-GO-LTW）的皮革切边废料的表征和性能分析，用于去除水生介质中的染料：废物增值方法

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-12 DOI: 10.1016/j.clwas.2025.100459

Sobur Ahmed , Sahidul Islam , Fatema-Tuj Zohra

This research tackles the environmental issue of dye pollution in aquatic media, which is a significant concern due to the toxic and persistent nature of synthetic dyes. In this research, a novel composite such as, unsaturated polyester resin-graphene oxide-leather trimming waste (UPR-GO-LTW) was developed by incorporating leather trimming waste (LTW) into a graphene based polymer matrix. This composite offers an effective, sustainable, and low-cost solution for removing harmful dyes from wastewater and becomes vital to align with the sustainable development goals (SDGs) and mitigate the adverse environmental and social impacts. The integration of LTW valorizes industrial waste and enhances the adsorption properties of the composite. Different analytical techniques were employed to reveal the structural, morphological, and chemical attributes of the composite. The ability of developed adsorbent was studied under various parameters viz. pH, dose, contact time, concentration and temperature to remove C.I. acid violet 54 (AV54) dye from synthetic solution. The composite was characterized by FTIR, XRD, EDX, and FESEM to confirm its effective synthesis. The XRD results revealed that developed composite was amorphous. The optimum pH, dose, contact time, and temperature for maximum dye removal were of 3.0, 1.0 g/L, 120 min, and 318 K, respectively. The isotherm, kinetics and thermodynamics were studied to find the adsorption mechanism. The experimental coefficient value, R² = 0.993 of Freundlich isotherm indicating heterogeneous adsorption. The maximum capacity of UPR-GO-LTW composite was 67.11 mg/g at its optimum pH 3.0. The study also revealed that AV54 dye adsorption was endothermic, physical, spontaneous, and practicable at higher temperature as the value of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) were 54.47, 1.90 and (-2.0449 to −7.3350) kJ/mol, respectively. The study concluded that a plenty of devoid leather trimming waste can be effectively consumed for production of valuable composite that has huge potential to remove dye from leather dyeing effluents to mitigate water pollution besides reduction of solid waste accumulation.

本研究解决了水生介质中染料污染的环境问题，由于合成染料的毒性和持久性，这是一个值得关注的问题。在本研究中，通过将皮革切边废料（LTW）掺入石墨烯基聚合物基体中，制备了不饱和聚酯树脂-氧化石墨烯-皮革切边废料（UPR-GO-LTW）这种新型复合材料。这种复合材料为去除废水中的有害染料提供了一种有效、可持续、低成本的解决方案，对于实现可持续发展目标（sdg）和减轻对环境和社会的不利影响至关重要。LTW的掺入使工业废弃物增值，提高了复合材料的吸附性能。采用不同的分析技术来揭示复合材料的结构、形态和化学性质。研究了所研制的吸附剂在pH、剂量、接触时间、浓度和温度等参数下对合成溶液中C.I.酸紫54 （AV54）染料的脱除能力。通过FTIR、XRD、EDX、FESEM等表征了该复合材料的合成效果。XRD结果表明，制备的复合材料为非晶态。最佳脱色pH、剂量、接触时间和温度分别为3.0、1.0 g/L、120 min和318 K。通过等温线、动力学和热力学研究，探讨了吸附机理。Freundlich等温线的实验系数值R2 = 0.993，表明非均相吸附。在最佳pH为3.0时，ubr - go - ltw复合材料的最大容量为67.11 mg/g。AV54对染料的吸附具有吸热性、物理性、自发性和较高温度下的可操作性，其焓（ΔH）、熵（ΔS）和吉布斯自由能（ΔG）分别为54.47、1.90和（-2.0449 ~−7.3350）kJ/mol。研究结果表明，大量无价值的皮革修剪废弃物可被有效利用，用于生产有价值的复合材料，该复合材料在减少固体废物积累的同时，还具有从皮革染色废水中去除染料以减轻水污染的巨大潜力。

{"title":"Characterization and performance analysis of leather trimming waste incorporated graphene-based composite (UPR-GO-LTW) for the removal of dye from aquatic media: A waste valorization approach","authors":"Sobur Ahmed , Sahidul Islam , Fatema-Tuj Zohra","doi":"10.1016/j.clwas.2025.100459","DOIUrl":"10.1016/j.clwas.2025.100459","url":null,"abstract":"<div><div>This research tackles the environmental issue of dye pollution in aquatic media, which is a significant concern due to the toxic and persistent nature of synthetic dyes. In this research, a novel composite such as, unsaturated polyester resin-graphene oxide-leather trimming waste (UPR-GO-LTW) was developed by incorporating leather trimming waste (LTW) into a graphene based polymer matrix. This composite offers an effective, sustainable, and low-cost solution for removing harmful dyes from wastewater and becomes vital to align with the sustainable development goals (SDGs) and mitigate the adverse environmental and social impacts. The integration of LTW valorizes industrial waste and enhances the adsorption properties of the composite. Different analytical techniques were employed to reveal the structural, morphological, and chemical attributes of the composite. The ability of developed adsorbent was studied under various parameters viz. pH, dose, contact time, concentration and temperature to remove C.I. acid violet 54 (AV54) dye from synthetic solution. The composite was characterized by FTIR, XRD, EDX, and FESEM to confirm its effective synthesis. The XRD results revealed that developed composite was amorphous. The optimum pH, dose, contact time, and temperature for maximum dye removal were of 3.0, 1.0 g/L, 120 min, and 318 K, respectively. The isotherm, kinetics and thermodynamics were studied to find the adsorption mechanism. The experimental coefficient value, R<sup>2</sup> = 0.993 of Freundlich isotherm indicating heterogeneous adsorption. The maximum capacity of UPR-GO-LTW composite was 67.11 mg/g at its optimum pH 3.0. The study also revealed that AV54 dye adsorption was endothermic, physical, spontaneous, and practicable at higher temperature as the value of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) were 54.47, 1.90 and (-2.0449 to −7.3350) kJ/mol, respectively. The study concluded that a plenty of devoid leather trimming waste can be effectively consumed for production of valuable composite that has huge potential to remove dye from leather dyeing effluents to mitigate water pollution besides reduction of solid waste accumulation.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100459"},"PeriodicalIF":3.9,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749644","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}

引用次数: 0

Valorization of Colombian native avocado (Persea americana cv. papelillo): biochar, bio-oil, biogas, and edible oil production 哥伦比亚本土鳄梨（Persea americana cv.）的价值评估。Papelillo)：生物炭，生物油，沼气和食用油生产

IF 3.9

Cleaner Waste Systems

Pub Date : 2025-12-12 DOI: 10.1016/j.clwas.2025.100458

Dionisio Humberto Malagón-Romero , Marco Antonio Velasco-Peña , Juan Pablo Arrubla-Vélez , Luis Fernando Clavijo-Barreto , Iván Nicolás Barrera-Mendoza , Edwin David Jiménez-Montero

The Colombian native avocado variety Persea americana cv. Papelillo, traditionally cultivated alongside coffee crops, remains scientifically underexplored despite its local economic importance. Unlike commercial cultivars such as Hass, this variety faces commercialization challenges due to rapid ripening and oxidation, leading to significant underutilization of its byproducts. This research addresses that gap by integrating two valorization routes for Papelillo byproducts—seeds and second-grade pulp—within a circular bioeconomy framework. Slow pyrolysis of seeds was performed to produce biochar, bio-oil, and biogas, while hydrodynamic cavitation was used to extract edible oil from second-grade pulp. Thermal decomposition kinetics were analyzed using thermogravimetric (TGA) and derivative thermogravimetric (DTG) techniques, supported by Fourier-transform infrared spectroscopy (FTIR) and gas chromatography–mass spectrometry (GC–MS). Activation energies were calculated through the Ozawa–Flynn–Wall and Kissinger–Akahira–Sunose models. Pyrolysis yielded 31.2 % biochar (21.39 kJ/kg calorific value), 3.7 % bio-oil, and 59.8 % biogas. The biochar exhibited favorable morphology and high heavy-metal adsorption potential. Hydrodynamic cavitation achieved a 69.16 % oil yield in 15 min with low energy intensity (990 kJ/kg), producing oil rich in polyunsaturated fatty acids and with desirable physicochemical properties. This study presents the first integrated dual-valorization model for the native Colombian avocado variety, Persea americana cv. Papelillo. The developed framework integrates the hydrodynamic cavitation-assisted extraction of edible oil from pulp with the slow pyrolysis of biomass waste like seeds. This model successfully demonstrates the feasibility of converting this native avocado waste into bio-oil, biochar and nutraceutical-grade oils, thereby supporting sustainable agro-industrial practices and regional bioeconomic development in Colombia.

哥伦比亚本土鳄梨品种美洲鳄梨。Papelillo传统上与咖啡作物一起种植，尽管它在当地具有重要的经济意义，但在科学上仍未得到充分开发。与哈斯等商业品种不同，该品种由于快速成熟和氧化而面临商业化挑战，导致其副产品严重利用不足。本研究通过在循环生物经济框架内整合木瓜副产品（种子和二级纸浆）的两种增值途径来解决这一差距。采用种子慢速热解制得生物炭、生物油和沼气，采用流体动力空化法从二级纸浆中提取食用油。热分解动力学采用热重（TGA）和衍生热重（DTG）技术，傅里叶变换红外光谱（FTIR）和气相色谱-质谱（GC-MS）技术进行分析。通过Ozawa-Flynn-Wall和Kissinger-Akahira-Sunose模型计算活化能。热解得到31.2 %的生物炭（21.39 kJ/kg热值），3.7 %的生物油和59.8 %的沼气。生物炭表现出良好的形态和较高的重金属吸附电位。流体动力空化在15 min内以低能量强度（990 kJ/kg）获得了69.16% %的产油率，生产出富含多不饱和脂肪酸且具有理想物理化学性质的油。本研究提出了哥伦比亚本土鳄梨品种Persea americana cv的第一个综合双增值模型。Papelillo。开发的框架将流体动力空化辅助从纸浆中提取食用油与种子等生物质废物的缓慢热解相结合。该模型成功地证明了将这种本地鳄梨废物转化为生物油、生物炭和营养保健级油的可行性，从而支持哥伦比亚可持续的农业工业实践和区域生物经济发展。

{"title":"Valorization of Colombian native avocado (Persea americana cv. papelillo): biochar, bio-oil, biogas, and edible oil production","authors":"Dionisio Humberto Malagón-Romero , Marco Antonio Velasco-Peña , Juan Pablo Arrubla-Vélez , Luis Fernando Clavijo-Barreto , Iván Nicolás Barrera-Mendoza , Edwin David Jiménez-Montero","doi":"10.1016/j.clwas.2025.100458","DOIUrl":"10.1016/j.clwas.2025.100458","url":null,"abstract":"<div><div>The Colombian native avocado variety <em>Persea americana</em> cv. Papelillo, traditionally cultivated alongside coffee crops, remains scientifically underexplored despite its local economic importance. Unlike commercial cultivars such as Hass, this variety faces commercialization challenges due to rapid ripening and oxidation, leading to significant underutilization of its byproducts. This research addresses that gap by integrating two valorization routes for Papelillo byproducts—seeds and second-grade pulp—within a circular bioeconomy framework. Slow pyrolysis of seeds was performed to produce biochar, bio-oil, and biogas, while hydrodynamic cavitation was used to extract edible oil from second-grade pulp. Thermal decomposition kinetics were analyzed using thermogravimetric (TGA) and derivative thermogravimetric (DTG) techniques, supported by Fourier-transform infrared spectroscopy (FTIR) and gas chromatography–mass spectrometry (GC–MS). Activation energies were calculated through the Ozawa–Flynn–Wall and Kissinger–Akahira–Sunose models. Pyrolysis yielded 31.2 % biochar (21.39 kJ/kg calorific value), 3.7 % bio-oil, and 59.8 % biogas. The biochar exhibited favorable morphology and high heavy-metal adsorption potential. Hydrodynamic cavitation achieved a 69.16 % oil yield in 15 min with low energy intensity (990 kJ/kg), producing oil rich in polyunsaturated fatty acids and with desirable physicochemical properties. This study presents the first integrated dual-valorization model for the native Colombian avocado variety, <em>Persea americana</em> cv. Papelillo. The developed framework integrates the hydrodynamic cavitation-assisted extraction of edible oil from pulp with the slow pyrolysis of biomass waste like seeds. This model successfully demonstrates the feasibility of converting this native avocado waste into bio-oil, biochar and nutraceutical-grade oils, thereby supporting sustainable agro-industrial practices and regional bioeconomic development in Colombia.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"13 ","pages":"Article 100458"},"PeriodicalIF":3.9,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798529","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}

引用次数: 0