Pub Date : 2025-03-09DOI: 10.1016/j.jenvman.2025.124844
Yanjiahui Meng , Tian Feng , Zhen Fang , Weiwei Sun , Shuyu Zhao , Gang Yang , Lihua Wang
Atmospheric nitrogen deposition is one of the key sources of marine nutrients, significantly affecting marine ecosystems. However, the ecological response of marine ecosystems to current and future changes in nitrogen deposition remains unclear. This study investigates the effects of rising nitrogen deposition during the past decades on North Pacific ecosystems by utilizing a coupled physical-biological model. We estimate that the drastic 170% increase in nitrogen deposition during 1950–2020, as indicated by the ACCMIP project, leads to a 1% rise in plankton biomass and a 0.4% decrease in phosphate. These changes boost marine primary productivity and increase the demand for phosphorus, particularly in mid to low-latitude regions. Continued nitrogen deposition under different emission scenarios (RCP2.6, 6.0, and 8.5) during the next decades would exacerbate nutrient imbalances, with the nitrogen-to-phosphorus ratio rising by >0.25%, adversely affecting ecosystem stability. These findings provide insights into future responses of marine ecosystems to rising nitrogen deposition.
{"title":"Impacts of decadal increasing nitrogen deposition on North Pacific marine ecosystems","authors":"Yanjiahui Meng , Tian Feng , Zhen Fang , Weiwei Sun , Shuyu Zhao , Gang Yang , Lihua Wang","doi":"10.1016/j.jenvman.2025.124844","DOIUrl":"10.1016/j.jenvman.2025.124844","url":null,"abstract":"<div><div>Atmospheric nitrogen deposition is one of the key sources of marine nutrients, significantly affecting marine ecosystems. However, the ecological response of marine ecosystems to current and future changes in nitrogen deposition remains unclear. This study investigates the effects of rising nitrogen deposition during the past decades on North Pacific ecosystems by utilizing a coupled physical-biological model. We estimate that the drastic 170% increase in nitrogen deposition during 1950–2020, as indicated by the ACCMIP project, leads to a 1% rise in plankton biomass and a 0.4% decrease in phosphate. These changes boost marine primary productivity and increase the demand for phosphorus, particularly in mid to low-latitude regions. Continued nitrogen deposition under different emission scenarios (RCP2.6, 6.0, and 8.5) during the next decades would exacerbate nutrient imbalances, with the nitrogen-to-phosphorus ratio rising by >0.25%, adversely affecting ecosystem stability. These findings provide insights into future responses of marine ecosystems to rising nitrogen deposition.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124844"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Microbial dissimilated iron reduction is one of the important driving forces of the biological and geochemical cycles of iron in nature. Plant root exudates dominated by organic acids are important electron donors of the rhizosphere dissimilar iron reduction microorganisms under flooded conditions. In this paper, we investigated the effects of different kinds and concentrations of organic acids on the dissimilation reduction process of goethite by Shewanella oneidensis MR-1, and explored the effect of phase transformation of iron minerals on its adsorption of Cd. The results showed that the low molecular weight organic acid promoted the dissolution of Fe(Ⅲ) in goethite, and ternary carboxylic acids had more obvious effect than binary carboxylic acids. The concentration of the solution of Fe(Ⅱ) increased by 63.95%–342.3%, the Fe(Ⅲ) concentration increased by 2.95%–260.6%. In addition, in the process of dissimilated iron reduction, the concentration of Cd released during the dissolution of iron ore is low due to the complexation of the low molecular organic acid, which will reduce the negative impact of high concentration Cd on Shewanella oneidensis MR-1, and further reduce the inhibitory effect of Cd on dissimilated iron reduction. It is noteworthy that we found that Cd released by soil iron minerals will be adsorbed and fixed again, that is, heavy metals loaded on trivalent iron minerals will be released and redistributed in the process of dissimilated iron reduction, which is one of the migration and transformation ways of heavy metals in the environments.
{"title":"Study on the effect of Shewanella oneidensis MR-1 coupled with the low molecular weight organic acid on the dissimilation reduction of Cd-containing goethite","authors":"Yixin Zhu, Junjun Zhao, Minwang Laipan, Lei Zhang, Chao Zhang, Junkang Guo","doi":"10.1016/j.jenvman.2025.124843","DOIUrl":"10.1016/j.jenvman.2025.124843","url":null,"abstract":"<div><div>Microbial dissimilated iron reduction is one of the important driving forces of the biological and geochemical cycles of iron in nature. Plant root exudates dominated by organic acids are important electron donors of the rhizosphere dissimilar iron reduction microorganisms under flooded conditions. In this paper, we investigated the effects of different kinds and concentrations of organic acids on the dissimilation reduction process of goethite by <em>Shewanella oneidensis</em> MR-1, and explored the effect of phase transformation of iron minerals on its adsorption of Cd. The results showed that the low molecular weight organic acid promoted the dissolution of Fe(Ⅲ) in goethite, and ternary carboxylic acids had more obvious effect than binary carboxylic acids. The concentration of the solution of Fe(Ⅱ) increased by 63.95%–342.3%, the Fe(Ⅲ) concentration increased by 2.95%–260.6%. In addition, in the process of dissimilated iron reduction, the concentration of Cd released during the dissolution of iron ore is low due to the complexation of the low molecular organic acid, which will reduce the negative impact of high concentration Cd on <em>Shewanella oneidensis</em> MR-1, and further reduce the inhibitory effect of Cd on dissimilated iron reduction. It is noteworthy that we found that Cd released by soil iron minerals will be adsorbed and fixed again, that is, heavy metals loaded on trivalent iron minerals will be released and redistributed in the process of dissimilated iron reduction, which is one of the migration and transformation ways of heavy metals in the environments.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124843"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124901
M.V. Mazzamuto , E. Enkhbat , J. Dolphin , G. Gankhuyag , B. Munkhtsog , U. Bayanmunkh , B. Sodnompil , B. Nasanbat , A. Yansanjav , J.L. Koprowski , S. Gansukh
In some regions of the world, long traditions of herding practices have coevolved with the natural ecosystems, sustaining livelihoods and biodiversity. However, in emerging economies, the populations that have long relied on livestock as their main income are now driving a dramatic increase in livestock numbers on the landscape. This study investigates the impacts of livestock (cattle and horses) and human activities on wild ungulates, Siberian roe deer (Capreolus pygargus), wapiti (Cervus canadensis), and wild boar (Sus scrofa), in Bogd Khan Mountain, Mongolia. Protected since the 12th century, this mountain is experiencing escalating anthropogenic pressures. Using camera traps in a random habitat stratified design, we analyzed temporal and spatial overlap between wild ungulates, livestock, and human activity. Livestock and human activities showed varying degrees of temporal overlap with wild ungulates, indicating potential competition and behavioral adaptations. Higher cattle relative abundance was associated with reduced wapiti abundance, suggesting potential competition for resources, whereas higher horse abundance corresponded to increased abundance of both wapiti and roe deer. Human abundance negatively impacted Siberian roe deer, likely due to disturbance, whereas wild boar exhibited resilience to these pressures. Our findings underscore the need for sustainable livestock management to mitigate competition and maintain ecological integrity. Integrating traditional herding practices with modern conservation strategies can enhance wildlife and livelihood resilience. This research highlights the utility of evidence-based approaches to balance biodiversity conservation and resource use in similar socio-ecological systems globally, where traditional livelihoods are increasingly at risk from modern disturbances.
{"title":"Sustainable livestock management under anthropogenic pressure: Bridging traditional herding and contemporary conservation in Eurasia's oldest protected area","authors":"M.V. Mazzamuto , E. Enkhbat , J. Dolphin , G. Gankhuyag , B. Munkhtsog , U. Bayanmunkh , B. Sodnompil , B. Nasanbat , A. Yansanjav , J.L. Koprowski , S. Gansukh","doi":"10.1016/j.jenvman.2025.124901","DOIUrl":"10.1016/j.jenvman.2025.124901","url":null,"abstract":"<div><div>In some regions of the world, long traditions of herding practices have coevolved with the natural ecosystems, sustaining livelihoods and biodiversity. However, in emerging economies, the populations that have long relied on livestock as their main income are now driving a dramatic increase in livestock numbers on the landscape. This study investigates the impacts of livestock (cattle and horses) and human activities on wild ungulates, Siberian roe deer (<em>Capreolus pygargus</em>), wapiti (<em>Cervus canadensis</em>), and wild boar (<em>Sus scrofa</em>), in Bogd Khan Mountain, Mongolia. Protected since the 12th century, this mountain is experiencing escalating anthropogenic pressures. Using camera traps in a random habitat stratified design, we analyzed temporal and spatial overlap between wild ungulates, livestock, and human activity. Livestock and human activities showed varying degrees of temporal overlap with wild ungulates, indicating potential competition and behavioral adaptations. Higher cattle relative abundance was associated with reduced wapiti abundance, suggesting potential competition for resources, whereas higher horse abundance corresponded to increased abundance of both wapiti and roe deer. Human abundance negatively impacted Siberian roe deer, likely due to disturbance, whereas wild boar exhibited resilience to these pressures. Our findings underscore the need for sustainable livestock management to mitigate competition and maintain ecological integrity. Integrating traditional herding practices with modern conservation strategies can enhance wildlife and livelihood resilience. This research highlights the utility of evidence-based approaches to balance biodiversity conservation and resource use in similar socio-ecological systems globally, where traditional livelihoods are increasingly at risk from modern disturbances.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124901"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124858
Antonio Castellano-Hinojosa , Manuel J. Gallardo-Altamirano , Clementina Pozo , Alejandro González-Martínez , Jesús González-López , Ian P.G. Marshall
There is growing interest in developing effective treatment technologies to mitigate the environmental impact of saline wastewater while also potentially recovering valuable resources from it. However, it remains largely unknown how different salinity levels impact treatment performance, energy generation, and the diversity and composition of electroactive microorganisms in MFCs treating real effluents such as urban wastewater. This study explores the impact of three salinity levels (3.5, 7, and 15 g/L NaCl) on current production, organic removal rates, and bacterial community dynamics in a continuous-flow microbial fuel cell (MFC) fed with urban wastewater. Using metagenomics and metatranscriptomics, we explored variations in the abundance and expression of extracellular electron transfer (EET) genes and those involved in other general metabolisms. We found that low salinity (3.5 g/L NaCl) enhanced both current production and organic removal efficiency compared to higher salinity levels. This improvement was linked to an increased abundance and activity of electroactive microorganisms, particularly taxa within the Ignavibacteria class, which possess genes coding for outer membrane cytochromes and porin cytochromes. Additionally, salinity influenced general metabolic genes and microbial community composition, with higher salinity levels limiting bacterial growth and diversity. This research provides valuable insights into the interplay between salinity stress and microbial adaptation, contributing to the optimization of MFC technologies for enhanced environmental and bioengineering applications.
{"title":"Salinity levels influence treatment performance and the activity of electroactive microorganisms in a microbial fuel cell system for wastewater treatment","authors":"Antonio Castellano-Hinojosa , Manuel J. Gallardo-Altamirano , Clementina Pozo , Alejandro González-Martínez , Jesús González-López , Ian P.G. Marshall","doi":"10.1016/j.jenvman.2025.124858","DOIUrl":"10.1016/j.jenvman.2025.124858","url":null,"abstract":"<div><div>There is growing interest in developing effective treatment technologies to mitigate the environmental impact of saline wastewater while also potentially recovering valuable resources from it. However, it remains largely unknown how different salinity levels impact treatment performance, energy generation, and the diversity and composition of electroactive microorganisms in MFCs treating real effluents such as urban wastewater. This study explores the impact of three salinity levels (3.5, 7, and 15 g/L NaCl) on current production, organic removal rates, and bacterial community dynamics in a continuous-flow microbial fuel cell (MFC) fed with urban wastewater. Using metagenomics and metatranscriptomics, we explored variations in the abundance and expression of extracellular electron transfer (EET) genes and those involved in other general metabolisms. We found that low salinity (3.5 g/L NaCl) enhanced both current production and organic removal efficiency compared to higher salinity levels. This improvement was linked to an increased abundance and activity of electroactive microorganisms, particularly taxa within the Ignavibacteria class, which possess genes coding for outer membrane cytochromes and porin cytochromes. Additionally, salinity influenced general metabolic genes and microbial community composition, with higher salinity levels limiting bacterial growth and diversity. This research provides valuable insights into the interplay between salinity stress and microbial adaptation, contributing to the optimization of MFC technologies for enhanced environmental and bioengineering applications.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124858"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124825
Yongfei Han , Tiantian Wei
The integration of supply chains and digitization not only enhances corporate performance but also has the potential to drive companies toward greener development. This study analyzes A-share listed companies in China from 2007 to 2021, utilizing the 2018 China Supply Chain Innovation and Application Pilot Policy as a quasi-natural experiment. Our findings indicate that supply chain digitization facilitates green innovation through digital transformation, reducing corporate carbon emissions. Notably, the decrease in Scope 3 carbon emissions induced by supply chain digitization is significantly greater than the overall reduction in carbon emissions. At the same time, supply chain digitalization reduces the carbon emissions of the core enterprise's suppliers, but it does not have a significant effect on the carbon emissions of its customers. This effect is especially pronounced in low-pollution industries, businesses with high supplier and customer concentrations, and companies with previously low carbon emissions. This research enriches the literature on supply chains and corporate carbon emissions and provides valuable insights for businesses, guiding the implementation of digital supply chains and low-carbon strategies.
{"title":"Supply chain digitization and corporate carbon emissions: A chain mediation examination based on digital transformation and green innovation","authors":"Yongfei Han , Tiantian Wei","doi":"10.1016/j.jenvman.2025.124825","DOIUrl":"10.1016/j.jenvman.2025.124825","url":null,"abstract":"<div><div>The integration of supply chains and digitization not only enhances corporate performance but also has the potential to drive companies toward greener development. This study analyzes A-share listed companies in China from 2007 to 2021, utilizing the 2018 China Supply Chain Innovation and Application Pilot Policy as a quasi-natural experiment. Our findings indicate that supply chain digitization facilitates green innovation through digital transformation, reducing corporate carbon emissions. Notably, the decrease in Scope 3 carbon emissions induced by supply chain digitization is significantly greater than the overall reduction in carbon emissions. At the same time, supply chain digitalization reduces the carbon emissions of the core enterprise's suppliers, but it does not have a significant effect on the carbon emissions of its customers. This effect is especially pronounced in low-pollution industries, businesses with high supplier and customer concentrations, and companies with previously low carbon emissions. This research enriches the literature on supply chains and corporate carbon emissions and provides valuable insights for businesses, guiding the implementation of digital supply chains and low-carbon strategies.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124825"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124833
Jie Xi , Wei Fu , Luca Maria Francesco Fabris , Jiping Wen , Zhouyu Fan , Yitong Pan , Siyu Wang
Climate change has intensified wildfire activity, necessitating a shift towards sustainable fire management strategies that embrace the concept of fire coexistence. Fire coexistence recognizes the role of fire as a natural ecological process and integrates the adaptations of flora (e.g., fire-resistant bark, regenerative capacity), fauna (e.g., fuel reduction through grazing, creation of natural firebreaks), and traditional land management practices (e.g., controlled burns, agricultural firebreaks) that enable ecosystems to persist with fire. These "coexistence factors" are crucial for effective prescribed burning, ensuring minimal disruption to fire-adapted species and maximizing long-term ecosystem resilience. While prescribed burning is a recognized management tool, a comprehensive framework for spatially integrating these coexistence factors into regional-scale planning is lacking. This study addresses this gap by developing a novel approach that spatially optimizes prescribed burning by integrating fire risk and coexistence capacity. Applying this approach to the Jialing River watershed (China), a fire-prone mountainous region, we use machine learning and deep learning to predict fire risk and identify areas with high coexistence potential. Zonation 5 is then employed for spatial prioritization. Results reveal a significant spatial correlation between fire risk and coexistence capacity, with high-value clusters concentrated in the central and southern parts of the study area, particularly around the Jialing River and forested regions. Specifically, 4% of the study area in the central and southern regions (value > 0.679) was classified as very high fire risk, while the top 10% of the area exhibited high coexistence capacity (value > 0.9). Based on Zonation 5 optimization, 5% of fire-prone forests with high coexistence capacity were identified as priority areas for prescribed burning, concentrated primarily in eastern Beibei. This integrated approach offers valuable guidance for policymakers, land planners, and stakeholders in sustainably managing fire hazards in similar mountainous regions globally.
{"title":"Integrating flora, fauna, and indigenous practices into spatial optimization for prescribed burning","authors":"Jie Xi , Wei Fu , Luca Maria Francesco Fabris , Jiping Wen , Zhouyu Fan , Yitong Pan , Siyu Wang","doi":"10.1016/j.jenvman.2025.124833","DOIUrl":"10.1016/j.jenvman.2025.124833","url":null,"abstract":"<div><div>Climate change has intensified wildfire activity, necessitating a shift towards sustainable fire management strategies that embrace the concept of fire coexistence. Fire coexistence recognizes the role of fire as a natural ecological process and integrates the adaptations of flora (e.g., fire-resistant bark, regenerative capacity), fauna (e.g., fuel reduction through grazing, creation of natural firebreaks), and traditional land management practices (e.g., controlled burns, agricultural firebreaks) that enable ecosystems to persist with fire. These \"coexistence factors\" are crucial for effective prescribed burning, ensuring minimal disruption to fire-adapted species and maximizing long-term ecosystem resilience. While prescribed burning is a recognized management tool, a comprehensive framework for spatially integrating these coexistence factors into regional-scale planning is lacking. This study addresses this gap by developing a novel approach that spatially optimizes prescribed burning by integrating fire risk and coexistence capacity. Applying this approach to the Jialing River watershed (China), a fire-prone mountainous region, we use machine learning and deep learning to predict fire risk and identify areas with high coexistence potential. Zonation 5 is then employed for spatial prioritization. Results reveal a significant spatial correlation between fire risk and coexistence capacity, with high-value clusters concentrated in the central and southern parts of the study area, particularly around the Jialing River and forested regions. Specifically, 4% of the study area in the central and southern regions (value > 0.679) was classified as very high fire risk, while the top 10% of the area exhibited high coexistence capacity (value > 0.9). Based on Zonation 5 optimization, 5% of fire-prone forests with high coexistence capacity were identified as priority areas for prescribed burning, concentrated primarily in eastern Beibei. This integrated approach offers valuable guidance for policymakers, land planners, and stakeholders in sustainably managing fire hazards in similar mountainous regions globally.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124833"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124818
Afrouz Yousefi , Farah Rahman Omi , Lingling Yang , Soliu O. Ganiyu , Aman Ullah , Mohamed Gamal El-Din , Mohtada Sadrzadeh
Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants that pose significant toxicity risks to humans and ecosystems. Traditional advanced oxidation processes using boron-doped diamond (BDD) anodes degrade PFAS in wastewater effectively but suffer from slow kinetics and high energy costs, limiting commercial application. This study introduces a hybrid process combining cathodic electro-Fenton (EF), anodic oxidation via a BDD anode, and membrane distillation (MD) to improve perfluorooctanoate (PFOA) degradation efficiency and reduce energy use. Increasing the current density from 50 to 500 A/m2 significantly raised the concentration of produced H2O2 from 0.25 mM to 2.3 mM, accelerating PFOA degradation and mineralization. At 50 A/m2, no mineralization of PFOA occurred in the EF/BDD process, while the EF/BDD-MD process achieved 45% mineralization due to increased PFOA concentration in the electrolytic cell. At 500 A/m2, the EF/BDD-MD process achieved 95% PFOA mineralization. Findings reveal that while EF-generated •OH radicals assist degradation, the BDD(•OH) anode was the primary driver, driving 80% of the reaction. This degradation was initiated by direct electron transfer at the BDD surface, followed by homogeneous and heterogeneous •OH radicals enhancing the degradation and mineralization process. The hybrid process also lowered energy consumption, making the treatment feasible for large scales.
{"title":"Innovative hybrid approach for enhanced PFAS degradation and removal: Integrating membrane distillation, cathodic electro-Fenton, and anodic oxidation","authors":"Afrouz Yousefi , Farah Rahman Omi , Lingling Yang , Soliu O. Ganiyu , Aman Ullah , Mohamed Gamal El-Din , Mohtada Sadrzadeh","doi":"10.1016/j.jenvman.2025.124818","DOIUrl":"10.1016/j.jenvman.2025.124818","url":null,"abstract":"<div><div>Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants that pose significant toxicity risks to humans and ecosystems. Traditional advanced oxidation processes using boron-doped diamond (BDD) anodes degrade PFAS in wastewater effectively but suffer from slow kinetics and high energy costs, limiting commercial application. This study introduces a hybrid process combining cathodic electro-Fenton (EF), anodic oxidation via a BDD anode, and membrane distillation (MD) to improve perfluorooctanoate (PFOA) degradation efficiency and reduce energy use. Increasing the current density from 50 to 500 A/m<sup>2</sup> significantly raised the concentration of produced H<sub>2</sub>O<sub>2</sub> from 0.25 mM to 2.3 mM, accelerating PFOA degradation and mineralization. At 50 A/m<sup>2</sup>, no mineralization of PFOA occurred in the EF/BDD process, while the EF/BDD-MD process achieved 45% mineralization due to increased PFOA concentration in the electrolytic cell. At 500 A/m<sup>2</sup>, the EF/BDD-MD process achieved 95% PFOA mineralization. Findings reveal that while EF-generated <sup>•</sup>OH radicals assist degradation, the BDD(<sup>•</sup>OH) anode was the primary driver, driving 80% of the reaction. This degradation was initiated by direct electron transfer at the BDD surface, followed by homogeneous and heterogeneous <sup>•</sup>OH radicals enhancing the degradation and mineralization process. The hybrid process also lowered energy consumption, making the treatment feasible for large scales.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124818"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-09DOI: 10.1016/j.jenvman.2025.124898
Nan Zhang , Lingyu Bai , Xiaxing Wei , Tao Li , Yuefeng Tang , Jiong Wen , Zhi Peng , Yang Zhang , Yanan Wang , Xibai Zeng , Shiming Su
Soil organic carbon (SOC) plays a crucial role in plant nutrient supply and soil physical, chemical, and biological function regulation. Factors such as climate change, human activities, and farm management practices can adversely affect SOC. Here, paddy soil in the double-cropping rice area of Hunan Province of China was cultured with eight kinds of organic materials, and the effects of organic fertilization on SOC content, humus content, and soil carbon sequestration efficiency were analyzed. The addition of straw, green fertilizer, and organic fertilizer had a positive influence on active SOC content. Straw addition had the most prolonged impact on soil microbial biomass carbon content, and green manure had the most rapid influence on soil dissolved organic carbon content. All organic materials enhanced the soil humus content; furthermore, the addition of organic fertilizers significantly improved the carbon sequestration efficiency among all treatments. The results of controlled culture experiments in paddy soils established that applying organic materials can increase SOC content, active carbon components, soil humus content, and the carbon fixation rate, thereby improving soil fertility. This study provides a theoretical basis for the optimal fertilization of paddy soil with organic material addition in China.
{"title":"Effects of organic material addition on carbon cycling and soil fertility in paddy soil","authors":"Nan Zhang , Lingyu Bai , Xiaxing Wei , Tao Li , Yuefeng Tang , Jiong Wen , Zhi Peng , Yang Zhang , Yanan Wang , Xibai Zeng , Shiming Su","doi":"10.1016/j.jenvman.2025.124898","DOIUrl":"10.1016/j.jenvman.2025.124898","url":null,"abstract":"<div><div>Soil organic carbon (SOC) plays a crucial role in plant nutrient supply and soil physical, chemical, and biological function regulation. Factors such as climate change, human activities, and farm management practices can adversely affect SOC. Here, paddy soil in the double-cropping rice area of Hunan Province of China was cultured with eight kinds of organic materials, and the effects of organic fertilization on SOC content, humus content, and soil carbon sequestration efficiency were analyzed. The addition of straw, green fertilizer, and organic fertilizer had a positive influence on active SOC content. Straw addition had the most prolonged impact on soil microbial biomass carbon content, and green manure had the most rapid influence on soil dissolved organic carbon content. All organic materials enhanced the soil humus content; furthermore, the addition of organic fertilizers significantly improved the carbon sequestration efficiency among all treatments. The results of controlled culture experiments in paddy soils established that applying organic materials can increase SOC content, active carbon components, soil humus content, and the carbon fixation rate, thereby improving soil fertility. This study provides a theoretical basis for the optimal fertilization of paddy soil with organic material addition in China.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124898"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124831
Chonticha Leamdum , Nantharat Phruksaphithak , Chaisit Niyasom , Nils Kare Birkeland , Chonticha Mamimin , Sompong O-Thong
This study demonstrated the effectiveness of enriched anoxic methanotrophic consortium augmentation in reducing methane (CH4) emissions from rice cultivation while improving soil fertility and rice productivity. The enriched consortium from cattle farm effluent, dominated by Acinetobacter (65.5%) and containing both types I (Methylosarcina, Methylomagnum, and Methyloversatilis) and II (Methylocystis) methanotrophs, exhibited high methane oxidation rates (Vmax 45.70 ± 13.71 μmol-CH4⋅g−1⋅h−1 and Km 16.50 ± 4.95 μM). The optimal inoculum size for soil application was 0.2 L⋅m−2 (OD600 = 0.5), resulting in a CH4 reduction efficiency of 74.30 ± 3.56%. In rice pot experiments, the anoxic methanotrophic consortium with an inoculum size of 0.2 L⋅m−2 reduced methane emissions by 79.32 ± 3.96% without fertilizer and 29.22 ± 1.45% and 46.81 ± 1.87% when combined with organic and chemical fertilizers, respectively. The field-scale evaluation revealed that combined soil and irrigation water application with anoxic methanotrophic consortium augmentation was the most effective, reducing seasonal methane emissions from 32.8 ± 4.2 to 9.3 ± 1.5 g-CH4·m−2 and methane flux from 15.2 ± 2.1 to 4.3 ± 0.8 mg-CH4·m−2·h−1, representing a 71.7 ± 0.4% reduction. This method also increased plant height (6.5%) and tiller number (26.4%). The combined application method also resulted in the highest soil nutrient levels (96.1 mg-N·kg−1 soil, 21.8 mg-P·kg−1 soil, and 133.4 mg-K·kg−1 soil) and increased rice yield by 14.7% (975 g⋅m−2). These findings demonstrate that anoxic methanotrophic consortium augmentation is a sustainable approach to mitigate methane emissions and improve rice productivity, emphasizing the importance of integrating this strategy into rice cultivation practices in rainfed lowland areas.
{"title":"Enriched anoxic methanotrophic consortium augmentation for mitigating methane emissions in rainfed systems and climate-neutral rice production","authors":"Chonticha Leamdum , Nantharat Phruksaphithak , Chaisit Niyasom , Nils Kare Birkeland , Chonticha Mamimin , Sompong O-Thong","doi":"10.1016/j.jenvman.2025.124831","DOIUrl":"10.1016/j.jenvman.2025.124831","url":null,"abstract":"<div><div>This study demonstrated the effectiveness of enriched anoxic methanotrophic consortium augmentation in reducing methane (CH<sub>4</sub>) emissions from rice cultivation while improving soil fertility and rice productivity. The enriched consortium from cattle farm effluent, dominated by <em>Acinetobacter</em> (65.5%) and containing both types I (<em>Methylosarcina</em>, <em>Methylomagnum</em>, and <em>Methyloversatilis</em>) and II (<em>Methylocystis</em>) methanotrophs, exhibited high methane oxidation rates (V<sub>max</sub> 45.70 ± 13.71 μmol-CH<sub>4</sub>⋅g<sup>−1</sup>⋅h<sup>−1</sup> and K<sub>m</sub> 16.50 ± 4.95 μM). The optimal inoculum size for soil application was 0.2 L⋅m<sup>−2</sup> (OD<sub>600</sub> = 0.5), resulting in a CH<sub>4</sub> reduction efficiency of 74.30 ± 3.56%. In rice pot experiments, the anoxic methanotrophic consortium with an inoculum size of 0.2 L⋅m<sup>−2</sup> reduced methane emissions by 79.32 ± 3.96% without fertilizer and 29.22 ± 1.45% and 46.81 ± 1.87% when combined with organic and chemical fertilizers, respectively. The field-scale evaluation revealed that combined soil and irrigation water application with anoxic methanotrophic consortium augmentation was the most effective, reducing seasonal methane emissions from 32.8 ± 4.2 to 9.3 ± 1.5 g-CH<sub>4</sub>·m<sup>−2</sup> and methane flux from 15.2 ± 2.1 to 4.3 ± 0.8 mg-CH<sub>4</sub>·m<sup>−2</sup>·h<sup>−1</sup>, representing a 71.7 ± 0.4% reduction. This method also increased plant height (6.5%) and tiller number (26.4%). The combined application method also resulted in the highest soil nutrient levels (96.1 mg-N·kg<sup>−1</sup> soil, 21.8 mg-P·kg<sup>−1</sup> soil, and 133.4 mg-K·kg<sup>−1</sup> soil) and increased rice yield by 14.7% (975 g⋅m<sup>−2</sup>). These findings demonstrate that anoxic methanotrophic consortium augmentation is a sustainable approach to mitigate methane emissions and improve rice productivity, emphasizing the importance of integrating this strategy into rice cultivation practices in rainfed lowland areas.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124831"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-09DOI: 10.1016/j.jenvman.2025.124757
Kaifeng Duan , Naqib Ullah Khan , Hailong Liu , Antonio Ariza-Montes , Miseldra Gil-Marín
This study explores the moderating effect of trade diversification on the relationship between global value-chain participation and natural resource rents for 106 nations from 2005 to 2018. The study employs an extended system Generalized Method of Moments (GMM) model to address potential challenges related to endogeneity and serial correlation. The results demonstrate how natural resource rents inhibit global value-chain participation by multinational firms, deterring them from investing in resource-dependent economies and restricting their integration into global trade networks. Trade diversification serves an essential moderation role in this process; nations with more diverse trade arrangements are less vulnerable to resource rents' negative effect on global value-chain participation. Furthermore, this study unleashes the significance of employing ecologically sustainable methods to mitigate resource exploitation's detrimental environmental impacts and ensure a balanced economic development model. Diversifying trade links and export quality improvement efforts with diversifying trade can increase trade links, strengthen international value chains and facilitate adoption of new technologies and information encouraging participation in global value chains. Our findings underscore the significance of policy actions which promote trade diversification to better manage natural resources, leverage resource rents for long-term economic growth and build resilience against future economic shocks.
{"title":"Environmental implications of improving global value chain participation via trade diversification: Offsetting the effects of resource rents","authors":"Kaifeng Duan , Naqib Ullah Khan , Hailong Liu , Antonio Ariza-Montes , Miseldra Gil-Marín","doi":"10.1016/j.jenvman.2025.124757","DOIUrl":"10.1016/j.jenvman.2025.124757","url":null,"abstract":"<div><div>This study explores the moderating effect of trade diversification on the relationship between global value-chain participation and natural resource rents for 106 nations from 2005 to 2018. The study employs an extended system Generalized Method of Moments (GMM) model to address potential challenges related to endogeneity and serial correlation. The results demonstrate how natural resource rents inhibit global value-chain participation by multinational firms, deterring them from investing in resource-dependent economies and restricting their integration into global trade networks. Trade diversification serves an essential moderation role in this process; nations with more diverse trade arrangements are less vulnerable to resource rents' negative effect on global value-chain participation. Furthermore, this study unleashes the significance of employing ecologically sustainable methods to mitigate resource exploitation's detrimental environmental impacts and ensure a balanced economic development model. Diversifying trade links and export quality improvement efforts with diversifying trade can increase trade links, strengthen international value chains and facilitate adoption of new technologies and information encouraging participation in global value chains. Our findings underscore the significance of policy actions which promote trade diversification to better manage natural resources, leverage resource rents for long-term economic growth and build resilience against future economic shocks.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"379 ","pages":"Article 124757"},"PeriodicalIF":8.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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