Long-term exposure to PM2.5 (fine particulate matter with an aerodynamic diameter <2.5 μm) causes serious harm to human health. Urban forests have the potential to effectively mitigate PM2.5 in the air. However, with the progress of urbanization, the layout, structure, and functions of urban forests have evolved, and the impact of these transformations on their PM2.5 removal capacity remains to be fully explored. Our study used a dry deposition model to simulate the dynamics of PM2.5 removal by forests in Changchun City during rapid urbanization and identified the drivers. We found that the urban forest cover increased from 18.09% in 2000 to 24.59% in 2020. Although 12% of the urban forest was converted into impervious surfaces, the overall coverage still showed an increase, mainly due to the conversion of other land types, including cropland and wetland. Rapid urbanization also had a significant impact on the configuration of urban forests, as urban forest patches have become more fragmented, with simpler shapes. The PM2.5 removal of urban forests has gradually declined, affecting 45.50% of the urban area. The total PM2.5 removal amount decreased from 793 t·yr-1 to 528 t·yr-1. Urban forest landscape patterns primarily influenced the PM2.5 removal capacity, accounting for 72%. As impervious surfaces increased, the capacity was reduced, and the influence of landscape patterns weakened. This study confirmed the significant impact of urbanization on the PM2.5 removal capacity of urban forests, which gradually surpassed the regulatory effect of landscape patterns. These findings provide valuable theoretical support for urban environment and planning, and guide the development of effective air quality improvement policies.
{"title":"Dynamic Evolution of PM2.5 Removal by Urban Forests During Rapid Urbanization: From Forest Landscape Pattern Dominance to Impervious Surfaces","authors":"Yujie Guo, Chengcong Wang, Shengyang Hong, Wenhai Hong, Ruoxuan Geng, Zhibin Ren, Xingyuan He","doi":"10.1016/j.jclepro.2025.144930","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144930","url":null,"abstract":"Long-term exposure to PM<sub>2.5</sub> (fine particulate matter with an aerodynamic diameter <2.5 μm) causes serious harm to human health. Urban forests have the potential to effectively mitigate PM<sub>2.5</sub> in the air. However, with the progress of urbanization, the layout, structure, and functions of urban forests have evolved, and the impact of these transformations on their PM<sub>2.5</sub> removal capacity remains to be fully explored. Our study used a dry deposition model to simulate the dynamics of PM<sub>2.5</sub> removal by forests in Changchun City during rapid urbanization and identified the drivers. We found that the urban forest cover increased from 18.09% in 2000 to 24.59% in 2020. Although 12% of the urban forest was converted into impervious surfaces, the overall coverage still showed an increase, mainly due to the conversion of other land types, including cropland and wetland. Rapid urbanization also had a significant impact on the configuration of urban forests, as urban forest patches have become more fragmented, with simpler shapes. The PM<sub>2.5</sub> removal of urban forests has gradually declined, affecting 45.50% of the urban area. The total PM<sub>2.5</sub> removal amount decreased from 793 t·yr<sup>-1</sup> to 528 t·yr<sup>-1</sup>. Urban forest landscape patterns primarily influenced the PM<sub>2.5</sub> removal capacity, accounting for 72%. As impervious surfaces increased, the capacity was reduced, and the influence of landscape patterns weakened. This study confirmed the significant impact of urbanization on the PM<sub>2.5</sub> removal capacity of urban forests, which gradually surpassed the regulatory effect of landscape patterns. These findings provide valuable theoretical support for urban environment and planning, and guide the development of effective air quality improvement policies.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"53 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jclepro.2025.144776
Zulaikha Mokhtar, Steven Kenway, Ilje Pikaar
Safe and healthy waterways are essential for environmental sustainability, making the assessment of industrial effluent discharge compliance critical. This study investigates stakeholder perspectives on alternative rating assessments for measuring industry discharge compliance, addressing the current fragmentation in stakeholder involvement in Malaysia. A survey was conducted with 519 representatives from government agencies, non-governmental organizations, industries, environmental groups, and policymakers, analyzing six compliance rating assessments: planning and administration in legal compliance, industry and community empowerment, compliance operation, system implementation, environmental risk and emergency plan, and environmental audits. The findings reveal that 78% of participants support implementing new assessments, with system implementation, legal compliance, and compliance operation being the most accepted. Financial and tax incentives were identified as highly effective in encouraging industry participation in these assessments. Challenges such as financial constraints, compliance issues, manpower shortages, and a lack of awareness were also noted. This study not only provides insights into stakeholder perspectives but also highlights a promising path for future compliance management in Malaysia and beyond.
{"title":"ALTERNATIVE ASSESSMENT OF INDUSTRIAL EFFLUENT COMPLIANCE: A CASE STUDY OF STAKEHOLDERS’ PERSPECTIVES IN MALAYSIA","authors":"Zulaikha Mokhtar, Steven Kenway, Ilje Pikaar","doi":"10.1016/j.jclepro.2025.144776","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144776","url":null,"abstract":"Safe and healthy waterways are essential for environmental sustainability, making the assessment of industrial effluent discharge compliance critical. This study investigates stakeholder perspectives on alternative rating assessments for measuring industry discharge compliance, addressing the current fragmentation in stakeholder involvement in Malaysia. A survey was conducted with 519 representatives from government agencies, non-governmental organizations, industries, environmental groups, and policymakers, analyzing six compliance rating assessments: planning and administration in legal compliance, industry and community empowerment, compliance operation, system implementation, environmental risk and emergency plan, and environmental audits. The findings reveal that 78% of participants support implementing new assessments, with system implementation, legal compliance, and compliance operation being the most accepted. Financial and tax incentives were identified as highly effective in encouraging industry participation in these assessments. Challenges such as financial constraints, compliance issues, manpower shortages, and a lack of awareness were also noted. This study not only provides insights into stakeholder perspectives but also highlights a promising path for future compliance management in Malaysia and beyond.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"75 1 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jclepro.2025.144928
Sen Liang, Ke Wang, Li Zhang, Yue Li
Urban areas are pivotal in mitigating climate change and improving air quality. However, complex and ambiguous urban boundaries have significantly hindered the implementation of synergistic gas control strategies and policies. This study proposes and defines four types of urban boundaries: Urban Center (UC), Urban Area (UA), Urban Suburban (US), and Urban Administrative Boundary (AB). Using Guangzhou City, China, as a case study, this study identifies and delineates these boundaries based on population characteristics. By employing high spatial resolution gas emission data, this study analyzes the emission characteristics of CO2 and air pollutants and their performance within these distinct urban boundaries. The results indicate that stationary combustion and transportation sectors are the primary direct or indirect sources of CO2 and air pollutants. Notably, the top 10% of emission grids account for more than 60% of the total emissions. The UC, UA, and US are more representative of urban areas concerning human activities, whereas the AB should be considered a region rather than an urban area. The urban gas emissions are far cleaner than it actually is. The actual gas emissions of Guangzhou City are 55.7% (CO2), 34.1% (SO2), 42.5% (NOX), 40.9% (CO), 45.8% (PM10), and 48.5% (PM2.5) of the total. The space for synergistic gas management overlaps extensively with the delineated UC and UA, with minimal distribution within the US. This study underscores the importance of clear and rational urban boundaries for effective CO2 and air pollutant synergistic management policies and research.
{"title":"Urban Boundaries and Emission Performance: CO2 and Air Pollutant Synergy in China ——New Practice from Guangzhou City","authors":"Sen Liang, Ke Wang, Li Zhang, Yue Li","doi":"10.1016/j.jclepro.2025.144928","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144928","url":null,"abstract":"Urban areas are pivotal in mitigating climate change and improving air quality. However, complex and ambiguous urban boundaries have significantly hindered the implementation of synergistic gas control strategies and policies. This study proposes and defines four types of urban boundaries: Urban Center (UC), Urban Area (UA), Urban Suburban (US), and Urban Administrative Boundary (AB). Using Guangzhou City, China, as a case study, this study identifies and delineates these boundaries based on population characteristics. By employing high spatial resolution gas emission data, this study analyzes the emission characteristics of CO<sub>2</sub> and air pollutants and their performance within these distinct urban boundaries. The results indicate that stationary combustion and transportation sectors are the primary direct or indirect sources of CO<sub>2</sub> and air pollutants. Notably, the top 10% of emission grids account for more than 60% of the total emissions. The UC, UA, and US are more representative of urban areas concerning human activities, whereas the AB should be considered a region rather than an urban area. The urban gas emissions are far cleaner than it actually is. The actual gas emissions of Guangzhou City are 55.7% (CO<sub>2</sub>), 34.1% (SO<sub>2</sub>), 42.5% (NO<sub>X</sub>), 40.9% (CO), 45.8% (PM<sub>10</sub>), and 48.5% (PM<sub>2.5</sub>) of the total. The space for synergistic gas management overlaps extensively with the delineated UC and UA, with minimal distribution within the US. This study underscores the importance of clear and rational urban boundaries for effective CO<sub>2</sub> and air pollutant synergistic management policies and research.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"39 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jclepro.2025.144916
Mingjie Huang, Bingyuan Xu, Ke Feng, Wei Xiang, Xiaohui Wu, Yiliang Lv, Tao Zhou
Microscale zero valent iron (ZVI) is a promising material for in situ water purification through O2 activation, but its activity is hindered by the slow electron transfer rate caused by the shielding effect of the surface passivation layer. Herein, we introduce a synergistic strategy that combines an inorganic ligand, i.e., tetrapolyphosphate (TPP), with magnetic field (MF) to boost the O2 activation efficiency of ZVI under neutral conditions. This approach has resulted in a 4.7-fold increase in the degradation rate of diclofenac (DCF) compared to the MF-unassisted system and a remarkable 22.0-fold improvement over an analogous system with MF and EDTA. Multiphysics simulations, batch experiments, and characterizations revealed that the enhanced degradation rate was not only attributed to the elevated magnetic gradient on the ZVI surface to enrich the paramagnetic O2 and Fe ions, but also to the functions of TPP to suppress the annihilation of •OH and reduce the redox potential of Fe2+/Fe3+. Furthermore, a synergistic mechanism between MF and TPP that facilitates the detachment of the surface-bound Fe3+-TPP complex into the aqueous phase, thereby regenerating the surface active sites was elucidated. This study underscores the potential of the MF-TPP synergy as an effective strategy to enhance ZVI-based Fenton-like catalysis for pollutant remediation.
{"title":"Exploring the synergy between magnetic field and inorganic ligand for boosted O2 activation by microscale zero-valent iron","authors":"Mingjie Huang, Bingyuan Xu, Ke Feng, Wei Xiang, Xiaohui Wu, Yiliang Lv, Tao Zhou","doi":"10.1016/j.jclepro.2025.144916","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144916","url":null,"abstract":"Microscale zero valent iron (ZVI) is a promising material for in situ water purification through O<sub>2</sub> activation, but its activity is hindered by the slow electron transfer rate caused by the shielding effect of the surface passivation layer. Herein, we introduce a synergistic strategy that combines an inorganic ligand, i.e., tetrapolyphosphate (TPP), with magnetic field (MF) to boost the O<sub>2</sub> activation efficiency of ZVI under neutral conditions. This approach has resulted in a 4.7-fold increase in the degradation rate of diclofenac (DCF) compared to the MF-unassisted system and a remarkable 22.0-fold improvement over an analogous system with MF and EDTA. Multiphysics simulations, batch experiments, and characterizations revealed that the enhanced degradation rate was not only attributed to the elevated magnetic gradient on the ZVI surface to enrich the paramagnetic O<sub>2</sub> and Fe ions, but also to the functions of TPP to suppress the annihilation of •OH and reduce the redox potential of Fe<sup>2+</sup>/Fe<sup>3+</sup>. Furthermore, a synergistic mechanism between MF and TPP that facilitates the detachment of the surface-bound Fe<sup>3+</sup>-TPP complex into the aqueous phase, thereby regenerating the surface active sites was elucidated. This study underscores the potential of the MF-TPP synergy as an effective strategy to enhance ZVI-based Fenton-like catalysis for pollutant remediation.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"1 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jclepro.2025.144769
Munazza Naz, Zaib Maroof, Rehana Naheed, Muhammad Jawad
Environmental financial instruments are of paramount importance in facilitating the advancement of Environmental, Climate-Responsible development and making substantial contributions towards the attainment of carbon neutrality. However, these corporations have also faced criticism for misappropriating environmental funds to engage in deceptive practices known as "greenwashing". The primary objective of this study is to develop empirical models for the purpose of examining the influence of Climate Bonds on the environmental, economic, social, and management (EESM) Competitiveness of corporations. Recent studies have demonstrated that the utilization of Climate Bonds has the capacity to significantly augment the environmental, economic, social, and management (EESM) proficiency of corporations. On average, there is a substantial increase in Environmental, economic, social, and management (EESM) scores, amounting to approximately 20.5%.The available empirical evidence indicates that the issuance of Climate Bonds has the potential to enhance the accessibility of Enterprise financing, lower financing expenses, and optimize the maturity profile of Enterprise debt. Furthermore, the amelioration of fiscal limitations and the allocation of resources earmarked for environmentally sustainable goals through the utilization of Climate Bonds can result in advantageous outcomes for both Enterprise governance and Enterprise environmental governance. The claim is supported by empirical evidence indicating that the issuance of Climate Bonds can enhance Enterprise profitability, enable business growth, foster Environmental innovation, and promote environmental stewardship. The analysis of heterogeneity reveals that the impact of Climate Bond issuance on environmental, economic, social, and management (EESM) Competitiveness is notably significant within the private Enterprise sector and among companies that receive substantial media attention.
{"title":"Climate Bond issuance and Enterprise EESM Competitiveness: Steps toward Environmental and Climate-Responsible development","authors":"Munazza Naz, Zaib Maroof, Rehana Naheed, Muhammad Jawad","doi":"10.1016/j.jclepro.2025.144769","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144769","url":null,"abstract":"Environmental financial instruments are of paramount importance in facilitating the advancement of Environmental, Climate-Responsible development and making substantial contributions towards the attainment of carbon neutrality. However, these corporations have also faced criticism for misappropriating environmental funds to engage in deceptive practices known as \"greenwashing\". The primary objective of this study is to develop empirical models for the purpose of examining the influence of Climate Bonds on the environmental, economic, social, and management (EESM) Competitiveness of corporations. Recent studies have demonstrated that the utilization of Climate Bonds has the capacity to significantly augment the environmental, economic, social, and management (EESM) proficiency of corporations. On average, there is a substantial increase in Environmental, economic, social, and management (EESM) scores, amounting to approximately 20.5%.The available empirical evidence indicates that the issuance of Climate Bonds has the potential to enhance the accessibility of Enterprise financing, lower financing expenses, and optimize the maturity profile of Enterprise debt. Furthermore, the amelioration of fiscal limitations and the allocation of resources earmarked for environmentally sustainable goals through the utilization of Climate Bonds can result in advantageous outcomes for both Enterprise governance and Enterprise environmental governance. The claim is supported by empirical evidence indicating that the issuance of Climate Bonds can enhance Enterprise profitability, enable business growth, foster Environmental innovation, and promote environmental stewardship. The analysis of heterogeneity reveals that the impact of Climate Bond issuance on environmental, economic, social, and management (EESM) Competitiveness is notably significant within the private Enterprise sector and among companies that receive substantial media attention.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"29 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-31DOI: 10.1016/j.jclepro.2025.144868
Mehwish Tabassum, , Bin Yang, Xin Jia, Muhammad Nadeem Zafar
Bi based materials have been the subject of interest from past few years due to their peculiar, layered morphology and efficient band gap suitable for many applications notably photocatalysis. Photocatalysis being a high efficiency ecologically benign technology involves the use of light and a photocatalyst (semiconductor) for reactions to generate charge carriers involved in photocatalytic performance. Among all available photocatalysts, bismuth oxyhalides-based (BiOX, X = Cl, Br, I) nanomaterials with the available oxygen vacancies become a new trend in various applications i.e., water remediation, ammonia synthesis, hydrogen evolution and carbon dioxide reduction etc. Furthermore, now a days BiOX nanomaterials are also widely used to construct efficient photoelectrochemical (PEC) sensors used for various purposes etc. Thus, this review offers a contemporary summary of recent progress in surface modification through diverse design strategies, their impact on photocatalytic efficiency, and the wide array of applications via photocatalysis. Finally, we highlighted the challenges and future prospects by keeping in focus the advance applications. We aim to help researchers to design versatile but novel bismuth oxyhalide (BiOX) nanomaterials for a range of applications, and boost its photocatalytic efficiency, thereby advancing its effectiveness.
{"title":"Progress on synthesis, characterization and photocatalytic applications of bismuth oxyhalide based nanomaterials in cleaner environment and energy - A review","authors":"Mehwish Tabassum, , Bin Yang, Xin Jia, Muhammad Nadeem Zafar","doi":"10.1016/j.jclepro.2025.144868","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144868","url":null,"abstract":"Bi based materials have been the subject of interest from past few years due to their peculiar, layered morphology and efficient band gap suitable for many applications notably photocatalysis. Photocatalysis being a high efficiency ecologically benign technology involves the use of light and a photocatalyst (semiconductor) for reactions to generate charge carriers involved in photocatalytic performance. Among all available photocatalysts, bismuth oxyhalides-based (BiOX, X = Cl, Br, I) nanomaterials with the available oxygen vacancies become a new trend in various applications i.e., water remediation, ammonia synthesis, hydrogen evolution and carbon dioxide reduction etc. Furthermore, now a days BiOX nanomaterials are also widely used to construct efficient photoelectrochemical (PEC) sensors used for various purposes etc. Thus, this review offers a contemporary summary of recent progress in surface modification through diverse design strategies, their impact on photocatalytic efficiency, and the wide array of applications via photocatalysis. Finally, we highlighted the challenges and future prospects by keeping in focus the advance applications. We aim to help researchers to design versatile but novel bismuth oxyhalide (BiOX) nanomaterials for a range of applications, and boost its photocatalytic efficiency, thereby advancing its effectiveness.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"50 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-31DOI: 10.1016/j.jclepro.2025.144875
José E. Roldán-San Antonio, Mariano Martín
The management of waste from single-use fossil plastics is a challenge. This work presents a holistic multiscale analysis for the production of starch-based biopolymers by the valorisation of sewage sludge, lignocellulosic waste, and CO2, promoting the technological substitution of fossil-based plastics and circular economy. An MILP (Mixed Integer Linear Programming) formulation is developed to design a supply chain for the production of biopolymers where economic, environmental, social issues, and budget limitation are considered. The analysis is focused on Spain. The base case aiming at minimizing production network costs shows that it is possible to replace 51% of the polyethylene by starch-based polymers with a total investment of 3100 M$. A multi-objective optimization maximizing the decarbonization and social benefit while minimizing the costs promoted by the production network, provides a substitution level of 43% for the same budget, reducing the avoided emissions by 18.7% but with a social improvement of 10.34% compared with the economic case.
{"title":"Optimal Design of a Supply Chain for the Production of Starch-based Biopolymers by Waste Revalorization","authors":"José E. Roldán-San Antonio, Mariano Martín","doi":"10.1016/j.jclepro.2025.144875","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144875","url":null,"abstract":"The management of waste from single-use fossil plastics is a challenge. This work presents a holistic multiscale analysis for the production of starch-based biopolymers by the valorisation of sewage sludge, lignocellulosic waste, and CO<sub>2</sub>, promoting the technological substitution of fossil-based plastics and circular economy. An MILP (Mixed Integer Linear Programming) formulation is developed to design a supply chain for the production of biopolymers where economic, environmental, social issues, and budget limitation are considered. The analysis is focused on Spain. The base case aiming at minimizing production network costs shows that it is possible to replace 51% of the polyethylene by starch-based polymers with a total investment of 3100 M$. A multi-objective optimization maximizing the decarbonization and social benefit while minimizing the costs promoted by the production network, provides a substitution level of 43% for the same budget, reducing the avoided emissions by 18.7% but with a social improvement of 10.34% compared with the economic case.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"54 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-31DOI: 10.1016/j.jclepro.2025.144925
Wenwu Xu, Wenqian Bu, Jingyu Yu, Lili Yang, Zhaoyou Zhu, Yinglong Wang, Peizhe Cui
Dimethyl ether (DME) is widely regarded as the cleanest and most efficient diesel alternative fuel. The traditional production method is through the methanol dehydration process. This study proposes an innovative technology to directly synthesize DME by generating syngas through the co-gasification of coal and biomass plasma. This technology simplifies the production process and integrates the supercritical CO2 Brayton cycle to achieve efficient waste heat and power generation recovery. In order to utilize carbon dioxide in the exhaust gas, the system introduces the alkaline electrolyzer hydrogen production process and the carbon dioxide hydrogenation methanol process. Model validation and sensitivity analysis confirmed the reliability of the system and revealed the significant impact of key operating parameters on the system performance. The results of thermodynamic and economic studies show that the system energy efficiency and exergy efficiency are 73.50% and 64.24%, respectively, with a dynamic payback period of 6.22 years and a net present value of US$89.583 million. This study provides an innovative path for the clean production of DME, effectively balancing resource utilization and environmental protection.
{"title":"Thermodynamic and economic analysis of direct synthesis of dimethyl ether by plasma co-gasification","authors":"Wenwu Xu, Wenqian Bu, Jingyu Yu, Lili Yang, Zhaoyou Zhu, Yinglong Wang, Peizhe Cui","doi":"10.1016/j.jclepro.2025.144925","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144925","url":null,"abstract":"Dimethyl ether (DME) is widely regarded as the cleanest and most efficient diesel alternative fuel. The traditional production method is through the methanol dehydration process. This study proposes an innovative technology to directly synthesize DME by generating syngas through the co-gasification of coal and biomass plasma. This technology simplifies the production process and integrates the supercritical CO<sub>2</sub> Brayton cycle to achieve efficient waste heat and power generation recovery. In order to utilize carbon dioxide in the exhaust gas, the system introduces the alkaline electrolyzer hydrogen production process and the carbon dioxide hydrogenation methanol process. Model validation and sensitivity analysis confirmed the reliability of the system and revealed the significant impact of key operating parameters on the system performance. The results of thermodynamic and economic studies show that the system energy efficiency and exergy efficiency are 73.50% and 64.24%, respectively, with a dynamic payback period of 6.22 years and a net present value of US$89.583 million. This study provides an innovative path for the clean production of DME, effectively balancing resource utilization and environmental protection.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"60 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-31DOI: 10.1016/j.jclepro.2025.144841
Yuewen Yang, Toru Morotomi
Green public procurement (GPP), as a demand-side environmental policy tool, has advantages in mitigating underinvestment in eco-innovations. However, the innovation effects of green procurement remain a subject of debate, empirical studies of this policy across sectors and regions remain insufficient either. This study uses European country-level panel data to empirically investigate how adding green keywords to the contract award criteria for public procurement promotes eco-innovation. It also explores the potential moderating role of intellectual capital on this effect. The finding shows that the impact of GPP on eco-innovation is U-shaped, with innovation being stimulated only when the proportion of green contracts exceeds a certain turning point, which ranges from 16% to 50% among studied samples. Human capital significantly reduces this threshold due to its ability to mitigate knowledge scarcity. The innovation effect is more pronounced in the sectors with service inclination. Western European countries, having implemented National Action Plans earlier, have a lower required threshold, whereas Central and Eastern European Countries (CEEC), with higher procurement intensity, exhibit stronger marginal effects.
{"title":"When can green public procurement really stimulate eco-innovation? Considering the role of intellectual capital","authors":"Yuewen Yang, Toru Morotomi","doi":"10.1016/j.jclepro.2025.144841","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144841","url":null,"abstract":"Green public procurement (GPP), as a demand-side environmental policy tool, has advantages in mitigating underinvestment in eco-innovations. However, the innovation effects of green procurement remain a subject of debate, empirical studies of this policy across sectors and regions remain insufficient either. This study uses European country-level panel data to empirically investigate how adding green keywords to the contract award criteria for public procurement promotes eco-innovation. It also explores the potential moderating role of intellectual capital on this effect. The finding shows that the impact of GPP on eco-innovation is U-shaped, with innovation being stimulated only when the proportion of green contracts exceeds a certain turning point, which ranges from 16% to 50% among studied samples. Human capital significantly reduces this threshold due to its ability to mitigate knowledge scarcity. The innovation effect is more pronounced in the sectors with service inclination. Western European countries, having implemented National Action Plans earlier, have a lower required threshold, whereas Central and Eastern European Countries (CEEC), with higher procurement intensity, exhibit stronger marginal effects.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"22 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MPs and PFOA are widely found in water, and both are capable of causing different levels of damage to each organism. However, plant activities might alter the environmental behavior of MPs and PFOA during phytoremediation. In this study, based on Abotts equation and combined with correlation analysis, we revealed and evaluated the combined toxic effects and water purification capacity of predetermined concentrations of PS and PFOA on H. verticillata, and analyzed the adsorption kinetics of PS to PFOA. The results showed that PS and PFOA altered the biofilm permeability of H. verticillata and inhibited plant growth (synergistic). In contrast, at low concentration combinations, PS adsorption of PFOA reduced the utilization of PFOA by H. verticillata and weakened their respective inhibition of photosynthesis in H. verticillata (antagonistic). During this period, H. verticillata resisted PS and PFOA stress by activating CAT and APX, respectively, and reutilized nutrients for compensatory growth. This suggests that the combined effect of PS-PFOA co-pollutants is related to concentration ratio, site of action and species specificity. Meanwhile, H. verticillata synergized with the biological communities affected by the co-pollutant to purify the water and effectively remove PS and PFOA. This study provides new insights for assessing the ecological effects of MPs-PFAS co-pollution and provides a theoretical basis for improving phytoremediation.
{"title":"Synergetic and antagonistic effects of microplastics and perfluorooctanoic acid on constructive species in freshwater ecosystems","authors":"Heran Zhang, Hongjie Gao, Yafeng Li, Cheng Hu, Hongwei Yu, Xuexue Fan, Nan Shen, Peng Yuan","doi":"10.1016/j.jclepro.2025.144926","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144926","url":null,"abstract":"MPs and PFOA are widely found in water, and both are capable of causing different levels of damage to each organism. However, plant activities might alter the environmental behavior of MPs and PFOA during phytoremediation. In this study, based on Abotts equation and combined with correlation analysis, we revealed and evaluated the combined toxic effects and water purification capacity of predetermined concentrations of PS and PFOA on <em>H. verticillata</em>, and analyzed the adsorption kinetics of PS to PFOA. The results showed that PS and PFOA altered the biofilm permeability of <em>H. verticillata</em> and inhibited plant growth (synergistic). In contrast, at low concentration combinations, PS adsorption of PFOA reduced the utilization of PFOA by <em>H. verticillata</em> and weakened their respective inhibition of photosynthesis in <em>H. verticillata</em> (antagonistic). During this period, <em>H. verticillata</em> resisted PS and PFOA stress by activating CAT and APX, respectively, and reutilized nutrients for compensatory growth. This suggests that the combined effect of PS-PFOA co-pollutants is related to concentration ratio, site of action and species specificity. Meanwhile, <em>H. verticillata</em> synergized with the biological communities affected by the co-pollutant to purify the water and effectively remove PS and PFOA. This study provides new insights for assessing the ecological effects of MPs-PFAS co-pollution and provides a theoretical basis for improving phytoremediation.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"20 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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