Pub Date : 2025-01-28DOI: 10.1016/j.jclepro.2025.144821
Pengyu Shi, Yang Bai
In practice, consumers often worry about the quality of remanufactured products. Blockchain can alleviate these concerns by increasing supply chain transparency, thus boosting sales. However, Blockchain's information disclosure might encourage upstream suppliers to encroach, harming the original manufacturer. This raises the critical question of whether and when all supply chain members can accept Blockchain. We developed a game-theoretic model involving remanufacturing component suppliers and original manufacturers. The model distinguishes four scenarios based on whether blockchain technology is adopted and whether market encroachment occurs while considering the effects of brand advantage and environmental taxes. Our findings are as follows: Blockchain has always been able to improve the quality of remanufactured components and expand market demand while increasing the incentive for supplier encroachment. Under non-encroachment conditions, both suppliers and manufacturers benefit from Blockchain unless adoption costs are high. In the encroachment scenario, suppliers benefit from Blockchain only when production costs are lower. When the supplier's investment efficiency is relatively high, blockchain technology facilitates a win-win outcome for both parties in the encroachment scenario.
{"title":"Introducing Blockchain? Or not? Remanufacturing supply chain decisions that consider environmental taxes and upstream encroachment","authors":"Pengyu Shi, Yang Bai","doi":"10.1016/j.jclepro.2025.144821","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144821","url":null,"abstract":"In practice, consumers often worry about the quality of remanufactured products. Blockchain can alleviate these concerns by increasing supply chain transparency, thus boosting sales. However, Blockchain's information disclosure might encourage upstream suppliers to encroach, harming the original manufacturer. This raises the critical question of whether and when all supply chain members can accept Blockchain. We developed a game-theoretic model involving remanufacturing component suppliers and original manufacturers. The model distinguishes four scenarios based on whether blockchain technology is adopted and whether market encroachment occurs while considering the effects of brand advantage and environmental taxes. Our findings are as follows: Blockchain has always been able to improve the quality of remanufactured components and expand market demand while increasing the incentive for supplier encroachment. Under non-encroachment conditions, both suppliers and manufacturers benefit from Blockchain unless adoption costs are high. In the encroachment scenario, suppliers benefit from Blockchain only when production costs are lower. When the supplier's investment efficiency is relatively high, blockchain technology facilitates a win-win outcome for both parties in the encroachment scenario.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"33 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050192","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 : 2025-01-28DOI: 10.1016/j.jclepro.2025.144899
Xulinjia Liu, Bang Wu, Hao Chen, Zhuo Li, Xin Guo, Zimeng Liu
In this paper, the co-pyrolysis behavior of Zhundong coal and polypropylene (PP) was studied by reactive force field molecular dynamic (ReaxFF-MD) method combined with atomic labeling method to investigate the synergy evolution mechanism. Consistent product distribution and synergistic effect characteristics obtained from fixed-bed experiments (500-1000 °C) and ReaxFF MD (2000-3000 K) simulations at different temperatures suggesting that high temperatures promote the generation of tar products. The sources of the co-pyrolysis tar components were distinguished in detail, the results reveal that the components from coal migrated towards the tar fraction, whereas the components from plastics were confined to migration to heavy tar. The combination of free radicals generated stabilizing compounds categorized as heavy tar leading to an increase in tar yield. Moreover, co-pyrolysis promoted the macromolecular decomposition of both feedstocks at low temperature in the early stage, whereas labeling methods demonstrated that the H and hydrocarbon radicals were successively captured by the char with the extension of time to produce stabilized macromolecular intermediates. Furthermore, the inhibition of secondary reactions of coal tar at high temperatures result in the positive synergy of tar which overcomes the further decomposition behavior of PP tar into gas. The findings of the component migration perspective further enriched the theoretical information on the co-pyrolytic interaction between coal and plastics.
{"title":"Synergistic effect and redistribution characteristics during co-pyrolysis of lignite and polypropylene based on ReaxFF molecular dynamic","authors":"Xulinjia Liu, Bang Wu, Hao Chen, Zhuo Li, Xin Guo, Zimeng Liu","doi":"10.1016/j.jclepro.2025.144899","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144899","url":null,"abstract":"In this paper, the co-pyrolysis behavior of Zhundong coal and polypropylene (PP) was studied by reactive force field molecular dynamic (ReaxFF-MD) method combined with atomic labeling method to investigate the synergy evolution mechanism. Consistent product distribution and synergistic effect characteristics obtained from fixed-bed experiments (500-1000 °C) and ReaxFF MD (2000-3000 K) simulations at different temperatures suggesting that high temperatures promote the generation of tar products. The sources of the co-pyrolysis tar components were distinguished in detail, the results reveal that the components from coal migrated towards the tar fraction, whereas the components from plastics were confined to migration to heavy tar. The combination of free radicals generated stabilizing compounds categorized as heavy tar leading to an increase in tar yield. Moreover, co-pyrolysis promoted the macromolecular decomposition of both feedstocks at low temperature in the early stage, whereas labeling methods demonstrated that the H and hydrocarbon radicals were successively captured by the char with the extension of time to produce stabilized macromolecular intermediates. Furthermore, the inhibition of secondary reactions of coal tar at high temperatures result in the positive synergy of tar which overcomes the further decomposition behavior of PP tar into gas. The findings of the component migration perspective further enriched the theoretical information on the co-pyrolytic interaction between coal and plastics.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"36 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055416","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144872
Uche A. Osakede, Grace T. Adigun, Abigail O. Dick-Tonye, Joel T. Adeyemo, Opeyemi E. Olagunju, Olayinka O. Adenikinju
The inconclusive evidence regarding the effects of renewable energy consumption (RECONS) on health, coupled with high fossil fuel use and energy poverty in Africa, prompts a re-examination of the influence of carbon emissions (CEMS) and RECONS on health in the region. This study examined the impact of CEMS and RECONS on mortality rate in Africa and also explored the interactive effect of CEMS and RECONS on mortality. This is to establish whether RECONS cushions the effect of CEMS on mortality rate. Data for the study was obtained from the World Bank, Development Indicators and covered the period 2011 to 2023. The data was analysed using the Prais–Winsten (PW) model and the Feasible Generalized Least Squares (FGLS) method to account for cross-sectional dependence and heterogeneity common in panel data studies. Several mortality indicators were examined, including female, male, infant, and under-5 mortality rates. The results indicated that mortality rates increased with higher CEMS. Surprisingly, RECONS had a non-negative effect on mortality rates, except for female and male adult mortality, where a negative effect was observed in the FGLS model. The interactive effect of CEMS and RECONS did not show the expected negative impact on mortality rates. However, the positive effect of RECONS on mortality was minimal, suggesting potential health improvements with an increase in RECONS. Promoting RECONS, could therefore reduce mortality rates and induce better health outcome in Africa. This research adds to the few existing studies on the role of renewable energy consumption on environmental quality and health in Africa using more recent econometric techniques than applied in the literature.
{"title":"Carbon footprints and mortality in Africa: The role of renewable energy consumption","authors":"Uche A. Osakede, Grace T. Adigun, Abigail O. Dick-Tonye, Joel T. Adeyemo, Opeyemi E. Olagunju, Olayinka O. Adenikinju","doi":"10.1016/j.jclepro.2025.144872","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144872","url":null,"abstract":"The inconclusive evidence regarding the effects of renewable energy consumption (RECONS) on health, coupled with high fossil fuel use and energy poverty in Africa, prompts a re-examination of the influence of carbon emissions (CEMS) and RECONS on health in the region. This study examined the impact of CEMS and RECONS on mortality rate in Africa and also explored the interactive effect of CEMS and RECONS on mortality. This is to establish whether RECONS cushions the effect of CEMS on mortality rate. Data for the study was obtained from the World Bank, Development Indicators and covered the period 2011 to 2023. The data was analysed using the Prais–Winsten (PW) model and the Feasible Generalized Least Squares (FGLS) method to account for cross-sectional dependence and heterogeneity common in panel data studies. Several mortality indicators were examined, including female, male, infant, and under-5 mortality rates. The results indicated that mortality rates increased with higher CEMS. Surprisingly, RECONS had a non-negative effect on mortality rates, except for female and male adult mortality, where a negative effect was observed in the FGLS model. The interactive effect of CEMS and RECONS did not show the expected negative impact on mortality rates. However, the positive effect of RECONS on mortality was minimal, suggesting potential health improvements with an increase in RECONS. Promoting RECONS, could therefore reduce mortality rates and induce better health outcome in Africa. This research adds to the few existing studies on the role of renewable energy consumption on environmental quality and health in Africa using more recent econometric techniques than applied in the literature.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"47 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044353","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144882
Han Jia, Shujuan Zhang, Zhizhong Sun, Yapeng Wang, Ruiqiang Bai
Economic development, unique tourism resources, and lifestyle changes of herdsmen in the Qinghai-Tibet Plateau (QTP) have resulted in an increasing waste disposal problem and most of the domestic waste was dumped into garbage pits for open burning and simple landfills in the rural and pastoral areas of Tibet. However, knowledge about heat transfer, water, and pollutant transport from landfill leachate in cold regions is currently limited. A series of migration tests were carried out under freeze-thaw cycles (FTCs), analyzing the distribution of temperature, water, and pollutants from the landfill leachate (main components include ammonia nitrogen (AN), chemical oxygen demand (COD), and cadmium (Cd)). The results show that the distribution of temperature, water, and pollutants in frozen soil is closely related to FTCs, water migration, boundary temperature, and the polluted degree of soil. The response degree to the top temperature is largest, secondary, and smallest for the unpolluted, polluted, and polluting soil, respectively. In the polluting soil, with the increasing FTCs, the content of AN, Cd, and COD also increases, and the water content mainly increases in the first 5 cycles. AN and COD are mainly adsorbed in the shallow layer, and Cd is enriched in the bottom where the temperature is close to the initial freezing one. The higher the boundary temperature, the greater the adsorption capacity for AN and COD, and the smaller the enriched content of Cd in the measured depth. AN and Cd are more easily adsorbed or removed than COD.
{"title":"Migrating characteristics of pollutants from landfill leachate in cold regions and impact on hydrothermal conditions","authors":"Han Jia, Shujuan Zhang, Zhizhong Sun, Yapeng Wang, Ruiqiang Bai","doi":"10.1016/j.jclepro.2025.144882","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144882","url":null,"abstract":"Economic development, unique tourism resources, and lifestyle changes of herdsmen in the Qinghai-Tibet Plateau (QTP) have resulted in an increasing waste disposal problem and most of the domestic waste was dumped into garbage pits for open burning and simple landfills in the rural and pastoral areas of Tibet. However, knowledge about heat transfer, water, and pollutant transport from landfill leachate in cold regions is currently limited. A series of migration tests were carried out under freeze-thaw cycles (FTCs), analyzing the distribution of temperature, water, and pollutants from the landfill leachate (main components include ammonia nitrogen (AN), chemical oxygen demand (COD), and cadmium (Cd)). The results show that the distribution of temperature, water, and pollutants in frozen soil is closely related to FTCs, water migration, boundary temperature, and the polluted degree of soil. The response degree to the top temperature is largest, secondary, and smallest for the unpolluted, polluted, and polluting soil, respectively. In the polluting soil, with the increasing FTCs, the content of AN, Cd, and COD also increases, and the water content mainly increases in the first 5 cycles. AN and COD are mainly adsorbed in the shallow layer, and Cd is enriched in the bottom where the temperature is close to the initial freezing one. The higher the boundary temperature, the greater the adsorption capacity for AN and COD, and the smaller the enriched content of Cd in the measured depth. AN and Cd are more easily adsorbed or removed than COD.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"117 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050205","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144816
Junheng Cheng, Lintong Liao, Shu Lu, Tongtong Sun, Peng Wu
Carbon emission trading schemes have been widely implemented in many countries to achieve carbon peaking and carbon neutrality goals, significantly encouraging manufacturers to proactively invest in carbon emission reduction. The core manufacturer in green supply chain needs to comprehensively determine carbon emission reduction investments, raw material procurement, product production, transportation, distribution, and financing decisions by considering consumers’ green preferences and financial constraints. To effectively tackle this newly emerged practical decision-making problem, a mixed-integer linear programming (MILP) model with the objective of profit maximization is formulated. To address large-scale problems efficiently, a two-stage matheuristic algorithm (TSMA) is developed. Numerous test results indicate that TSMA significantly enhances solution efficiency and achieves high-quality solutions with gaps of less than 1.07%. The results confirm that carbon emission reduction investments and carbon pledge financing can simultaneously decrease manufacturers’ carbon emissions and improve the profitability of supply chains. Sensitivity analysis demonstrates that carbon quota prices and consumers’ green preferences positively impact profit and carbon emission reduction in green supply chains.
{"title":"Effective MILP and matheuristic for multi-echelon green supply chain operations and financing considering carbon emission reduction investment","authors":"Junheng Cheng, Lintong Liao, Shu Lu, Tongtong Sun, Peng Wu","doi":"10.1016/j.jclepro.2025.144816","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144816","url":null,"abstract":"Carbon emission trading schemes have been widely implemented in many countries to achieve carbon peaking and carbon neutrality goals, significantly encouraging manufacturers to proactively invest in carbon emission reduction. The core manufacturer in green supply chain needs to comprehensively determine carbon emission reduction investments, raw material procurement, product production, transportation, distribution, and financing decisions by considering consumers’ green preferences and financial constraints. To effectively tackle this newly emerged practical decision-making problem, a mixed-integer linear programming (MILP) model with the objective of profit maximization is formulated. To address large-scale problems efficiently, a two-stage matheuristic algorithm (TSMA) is developed. Numerous test results indicate that TSMA significantly enhances solution efficiency and achieves high-quality solutions with gaps of less than 1.07%. The results confirm that carbon emission reduction investments and carbon pledge financing can simultaneously decrease manufacturers’ carbon emissions and improve the profitability of supply chains. Sensitivity analysis demonstrates that carbon quota prices and consumers’ green preferences positively impact profit and carbon emission reduction in green supply chains.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"59 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044716","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144871
, Uma Maheswari, Raghava Reddy Kakarla, Tejraj M. Aminabhavi, V. Aravindan, Pratima Meshram
Recycling spent/used batteries can solve economic and environmental issues regarding the availability of graphite and resource depletion since the demand for graphite is growing with exponential technologies. Various batteries, including primary (manganese, alkaline) and secondary (lithium-ion, nickel-based batteries, vanadium redox flow batteries, sodium-sulfur batteries, lead acid batteries, electrochemical batteries, and supercapacitors), have been taken into consideration as a source of graphite. The graphite recovered must be converted to usable form like graphite oxide/graphene oxide or further as reduced graphene oxide for its high electrochemical property imparted to lithium-ion batteries (LIBs) via thermal, chemical and mechanical routes. The generated forms of graphite or carbon nanomaterials or carbon nanotubes (CNTs) have multiple merits viz., productivity, electrical conductivity and higher capacitance, over pristine, natural and synthetic graphite. These methods have shown high potential to prepare graphene oxide making it useful in photocatalysis, electronics, energy storage and sensors. Apart from the processing methods, mechanism, and property evaluation, a material flow analysis of recycling these batteries to recover graphite and the energy/cost savings are also illustrated.
{"title":"Recycling strategies for renewable graphite and other carbon nanomaterials from used batteries: A review","authors":", Uma Maheswari, Raghava Reddy Kakarla, Tejraj M. Aminabhavi, V. Aravindan, Pratima Meshram","doi":"10.1016/j.jclepro.2025.144871","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144871","url":null,"abstract":"Recycling spent/used batteries can solve economic and environmental issues regarding the availability of graphite and resource depletion since the demand for graphite is growing with exponential technologies. Various batteries, including primary (manganese, alkaline) and secondary (lithium-ion, nickel-based batteries, vanadium redox flow batteries, sodium-sulfur batteries, lead acid batteries, electrochemical batteries, and supercapacitors), have been taken into consideration as a source of graphite. The graphite recovered must be converted to usable form like graphite oxide/graphene oxide or further as reduced graphene oxide for its high electrochemical property imparted to lithium-ion batteries (LIBs) via thermal, chemical and mechanical routes. The generated forms of graphite or carbon nanomaterials or carbon nanotubes (CNTs) have multiple merits viz., productivity, electrical conductivity and higher capacitance, over pristine, natural and synthetic graphite. These methods have shown high potential to prepare graphene oxide making it useful in photocatalysis, electronics, energy storage and sensors. Apart from the processing methods, mechanism, and property evaluation, a material flow analysis of recycling these batteries to recover graphite and the energy/cost savings are also illustrated.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"4 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044285","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}
Bamboo and other biomass materials have become essential constituents in architecture and interior decoration owing to their outstanding environmental attributes. Nevertheless, their extensive utilization has given rise to substantial fire safety hazards, with toxic smoke frequently posing a greater lethality than heat. In this research, a fire warning coating with a mud brick structure was fabricated on the bamboo surface (AM@Bamboo) by combining positively charged flame retardant ammonium polyphosphate with the negatively charged groups on the MXene surface through a simple water evaporation-induced self-assembly method. The coating's abundant graded pores effectively suppressed the volatilization of smoke at high temperatures. Specifically, the concentrations of toxic NO2, NO, CO, and CO2 gases released during the combustion of AM@Bamboo decreased notably. Among them, the decreases in peak value of CO and CO2 were 21.2% and 61.1%, respectively. The limiting oxygen index value of AM@Bamboo rose to 36.06%, and the heat release rate was 166.51 kW/m2, which is 45.5% lower than that of bamboo. Simultaneously, MXene generated rutile type TiO2 with semiconductor properties at high temperatures, endowing bamboo with stable cycling warning capabilities. It can trigger an alarm within 5 s in case of a fire and is capable of cycling warnings for 10 cycles. Consequently, AM@Bamboo can be reused multiple times after a fire, greatly reducing its carbon footprint. This achievement provides novel concepts and methods for enhancing the fire safety of bamboo products, and its potential applications can be extended to emerging fields such as intelligent sensing and monitoring.
{"title":"An artificial mud brick structural coating endows bamboo with excellent flame retardant, smoke suppression and reliable fire warning performance","authors":"Fei Yang, Ying Ran, Qichao Bao, Pengxu Tao, Jianliang Ding, Shengnan Zhang, Jiawei Zhu, Chungui Du","doi":"10.1016/j.jclepro.2025.144884","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144884","url":null,"abstract":"Bamboo and other biomass materials have become essential constituents in architecture and interior decoration owing to their outstanding environmental attributes. Nevertheless, their extensive utilization has given rise to substantial fire safety hazards, with toxic smoke frequently posing a greater lethality than heat. In this research, a fire warning coating with a mud brick structure was fabricated on the bamboo surface (AM@Bamboo) by combining positively charged flame retardant ammonium polyphosphate with the negatively charged groups on the MXene surface through a simple water evaporation-induced self-assembly method. The coating's abundant graded pores effectively suppressed the volatilization of smoke at high temperatures. Specifically, the concentrations of toxic NO<sub>2</sub>, NO, CO, and CO<sub>2</sub> gases released during the combustion of AM@Bamboo decreased notably. Among them, the decreases in peak value of CO and CO<sub>2</sub> were 21.2% and 61.1%, respectively. The limiting oxygen index value of AM@Bamboo rose to 36.06%, and the heat release rate was 166.51 kW/m<sup>2</sup>, which is 45.5% lower than that of bamboo. Simultaneously, MXene generated rutile type TiO<sub>2</sub> with semiconductor properties at high temperatures, endowing bamboo with stable cycling warning capabilities. It can trigger an alarm within 5 s in case of a fire and is capable of cycling warnings for 10 cycles. Consequently, AM@Bamboo can be reused multiple times after a fire, greatly reducing its carbon footprint. This achievement provides novel concepts and methods for enhancing the fire safety of bamboo products, and its potential applications can be extended to emerging fields such as intelligent sensing and monitoring.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"27 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050203","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144876
Francisco A.G.S. Silva, Sara Branco, Fernando Dourado, Belmira Neto, Miguel Gama
Bacterial cellulose (BC) is a 3D exopolysaccharide synthesized by certain acetic acid bacteria, possessing unique properties such as nanofibrillar morphology and high purity. BC has gained increasing attention for several potential market applications, including in textiles. However, along with techno-economic challenges, the industrialization of BC pulp must align with sustainable practices and minimize the environmental impact. To date, a comparative environmental assessment of BC pulp against plant-based celluloses (e.g. wood pulp or nanocellulose (NC)) or of BC-lyocell against cotton or man-made cellulose fibers (e.g. viscose and lyocell) has not been reported.In this study, both BC pulp and BC-lyocell production were modelled for life cycle assessment (LCA). For BC pulp, the results were compared with nanocelluloses, using different life cycle impact assessment methods. For BC-lyocell, the results were compared with cotton, viscose, and lyocell fibres, using information available from the literature.The major contributors to the environmental impact of both the BC pulp and BC-lyocell were the preparation of the culture medium, followed by cellulose washing and energy consumption. The BC pulp showed lower environmental impacts than NCs. BC-Lyocell exhibited a larger environmental impact than cotton, viscose, and lyocell in most of the environmental categories, except for land use and water depletion. Following a comprehensive impact and sensitivity analysis, several measures were identified to enhance the environmental performance of BC, such as exploring by-products for culture medium preparation and optimizing the use of chemicals (NaOH) and energy.
{"title":"Life cycle assessment of bacterial cellulose and comparison to other cellulosic sources","authors":"Francisco A.G.S. Silva, Sara Branco, Fernando Dourado, Belmira Neto, Miguel Gama","doi":"10.1016/j.jclepro.2025.144876","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144876","url":null,"abstract":"Bacterial cellulose (BC) is a 3D exopolysaccharide synthesized by certain acetic acid bacteria, possessing unique properties such as nanofibrillar morphology and high purity. BC has gained increasing attention for several potential market applications, including in textiles. However, along with techno-economic challenges, the industrialization of BC pulp must align with sustainable practices and minimize the environmental impact. To date, a comparative environmental assessment of BC pulp against plant-based celluloses (e.g. wood pulp or nanocellulose (NC)) or of BC-lyocell against cotton or man-made cellulose fibers (e.g. viscose and lyocell) has not been reported.In this study, both BC pulp and BC-lyocell production were modelled for life cycle assessment (LCA). For BC pulp, the results were compared with nanocelluloses, using different life cycle impact assessment methods. For BC-lyocell, the results were compared with cotton, viscose, and lyocell fibres, using information available from the literature.The major contributors to the environmental impact of both the BC pulp and BC-lyocell were the preparation of the culture medium, followed by cellulose washing and energy consumption. The BC pulp showed lower environmental impacts than NCs. BC-Lyocell exhibited a larger environmental impact than cotton, viscose, and lyocell in most of the environmental categories, except for land use and water depletion. Following a comprehensive impact and sensitivity analysis, several measures were identified to enhance the environmental performance of BC, such as exploring by-products for culture medium preparation and optimizing the use of chemicals (NaOH) and energy.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"38 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044288","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144888
Geng Meng, Yong Wang, Zhaopeng Ouyang, Lei Deng, Yinglei Bai, Wenqing Li, Xiaojing Ma, Shunshan Shen, Fengzhi Piao, Tao Zhang, Kaile Sun
Crops worldwide are increasingly affected by excessive copper (Cu) stress due to pesticide use and industrial pollution, leading to impaired growth and metabolic disturbances. While exogenous melatonin (MT) has been shown to alleviate heavy metal stress, its specific molecular mechanisms in tomatoes remain unclear. This study utilizes transcriptomics and metabolomics to investigate how MT influences gene expression and metabolite accumulation under Cu stress in tomato plants. We found that MT enhances the expression of genes related to lignin synthesis, aiding in Cu sequestration within the cell wall. Additionally, MT boosts glutathione and amino acid levels, increases the expression of GST to chelate metals in cytosol. MT also induces the expression of heat response proteins (HSPs), and promotes the accumulation of flavones and proanthocyanidins to protect the cellular membranes. MT also activates heavy metal transporters for vacuolar metal storage and regulates the transcription factor SlMYB15, which is crucial for Cu stress response. Our findings provide insights into the mechanisms by which MT mitigates Cu toxicity, offering promising implications for breeding Cu-resistant plants.
{"title":"Transcriptome and metabolome association analysis revealed key factors involved in melatonin-mediated copper-stress detoxication in tomato","authors":"Geng Meng, Yong Wang, Zhaopeng Ouyang, Lei Deng, Yinglei Bai, Wenqing Li, Xiaojing Ma, Shunshan Shen, Fengzhi Piao, Tao Zhang, Kaile Sun","doi":"10.1016/j.jclepro.2025.144888","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144888","url":null,"abstract":"Crops worldwide are increasingly affected by excessive copper (Cu) stress due to pesticide use and industrial pollution, leading to impaired growth and metabolic disturbances. While exogenous melatonin (MT) has been shown to alleviate heavy metal stress, its specific molecular mechanisms in tomatoes remain unclear. This study utilizes transcriptomics and metabolomics to investigate how MT influences gene expression and metabolite accumulation under Cu stress in tomato plants. We found that MT enhances the expression of genes related to lignin synthesis, aiding in Cu sequestration within the cell wall. Additionally, MT boosts glutathione and amino acid levels, increases the expression of <em>GST</em> to chelate metals in cytosol. MT also induces the expression of heat response proteins (HSPs), and promotes the accumulation of flavones and proanthocyanidins to protect the cellular membranes. MT also activates heavy metal transporters for vacuolar metal storage and regulates the transcription factor <em>SlMYB15</em>, which is crucial for Cu stress response. Our findings provide insights into the mechanisms by which MT mitigates Cu toxicity, offering promising implications for breeding Cu-resistant plants.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"474 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050202","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 : 2025-01-27DOI: 10.1016/j.jclepro.2025.144892
Qi Zhou, Yuanwei Li, Weizhong Wu, Jianlong Wang
The complexity and variability of actual secondary effluent from wastewater treatment plants (WWTPs) pose significant treatment challenges. In this study, a two-stage biofilter packed with ZVI/Poly-3-hydroxybutyrate-cohyroxyvelate/sawdust (ZPS) composites was innovatively constructed to treat actual secondary effluent with high influent dissolved oxygen (DO) concentrations (3-8.5 mg/L) for 143 days in a WWTP. Results showed that advanced purification of real secondary effluent was achieved, and the effluent concentrations of TN and TP were stable below 2.0 mg/L and 0.1 mg/L, respectively, at influent TN<10 mg/L. Microbial community analysis identified unclassified_f__Rhodocyclaceae as the dominant denitrifiers in both first-class (FC) and second-class (SC) systems. The shift in dominant Fe-related bacteria from Ferritrophicum to Clostridium sensu stricto_7 from the FC to SC system with DO decreased suggested that ZVI's triple role in oxygen-capturing reagent, denitrification and organic matter decomposition. Co-occurrence network analysis deciphered that Thermomonas and Clostridium_sensu_stricto_10 were key genera in SC system, which formed an obvious Fe redox cycle process that bolsters denitrification under low DO levels. Differential functional gene analysis revealed that high DO could inhibit the activity of Cyt c, NOR and NOS, resulting in a slow and unstable electron transport and consumption in denitrification process. Furthermore, the down-regulation iron cycling genes (feoA and ABC.FEV.S) in FC system suggested that high DO mainly inhibited the Fe2+/Fe3+ transfer system. An inactive Fe cycle at high DO levels highlights the important role of Fe cycle in iron-based denitrification process. These findings advanced the understanding of effected mechanism of DO on nitrogen removal mediated by ZPS composites in actual tailwater treatment. Additionally, the novel ZPS composites can be combined with the removal of antibiotics, and other toxic or harmful substances within wastewater to expand their application.
{"title":"Application of pilot-scale two-stage ZVI-based biofilter for advanced nitrogen and phosphorus removal from the actual secondary effluent under high DO conditions: Focusing on the effect of DO on electron transfer and Fe cycle","authors":"Qi Zhou, Yuanwei Li, Weizhong Wu, Jianlong Wang","doi":"10.1016/j.jclepro.2025.144892","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.144892","url":null,"abstract":"The complexity and variability of actual secondary effluent from wastewater treatment plants (WWTPs) pose significant treatment challenges. In this study, a two-stage biofilter packed with ZVI/Poly-3-hydroxybutyrate-cohyroxyvelate/sawdust (ZPS) composites was innovatively constructed to treat actual secondary effluent with high influent dissolved oxygen (DO) concentrations (3-8.5 mg/L) for 143 days in a WWTP. Results showed that advanced purification of real secondary effluent was achieved, and the effluent concentrations of TN and TP were stable below 2.0 mg/L and 0.1 mg/L, respectively, at influent TN<10 mg/L. Microbial community analysis identified <em>unclassified_f__Rhodocyclaceae</em> as the dominant denitrifiers in both first-class (FC) and second-class (SC) systems. The shift in dominant Fe-related bacteria from <em>Ferritrophicum</em> to <em>Clostridium sensu stricto_7</em> from the FC to SC system with DO decreased suggested that ZVI's triple role in oxygen-capturing reagent, denitrification and organic matter decomposition. Co-occurrence network analysis deciphered that <em>Thermomonas</em> and <em>Clostridium_sensu_stricto_10</em> were key genera in SC system, which formed an obvious Fe redox cycle process that bolsters denitrification under low DO levels. Differential functional gene analysis revealed that high DO could inhibit the activity of Cyt c, NOR and NOS, resulting in a slow and unstable electron transport and consumption in denitrification process. Furthermore, the down-regulation iron cycling genes (<em>feoA</em> and <em>ABC.FEV.S</em>) in FC system suggested that high DO mainly inhibited the Fe<sup>2+</sup>/Fe<sup>3+</sup> transfer system. An inactive Fe cycle at high DO levels highlights the important role of Fe cycle in iron-based denitrification process. These findings advanced the understanding of effected mechanism of DO on nitrogen removal mediated by ZPS composites in actual tailwater treatment. Additionally, the novel ZPS composites can be combined with the removal of antibiotics, and other toxic or harmful substances within wastewater to expand their application.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"121 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050196","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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