Journal of Environmental Management最新文献

{"title":"Extracellular polymeric substances (EPS) in sewage sludge management: A call for methodological standardization.","authors":"Hajer Ben Hamed, Matia Mainardis, Alessandro Moretti, Dominique Toye, Angélique Léonard","doi":"10.1016/j.jenvman.2025.124407","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124407","url":null,"abstract":"<p><p>Extracellular polymeric substances (EPS) are crucial in sewage sludge management, influencing key processes such as sedimentation, dewatering, and drying. Despite their importance, the lack of standardized methods for EPS extraction and analysis has led to inconsistent research findings, hindering a thorough understanding of EPS's role in sludge treatment. This review paper addresses this issue by critically comparing various EPS extraction and analysis methods, emphasizing the urgent need for standardization in the field. Standardized methodologies will enable researchers to compare studies more accurately and derive meaningful insights into EPS's role across different stages of sludge treatment, ultimately advancing EPS knowledge and application in sludge management. Additionally, this paper summarizes findings from numerous studies on EPS impact in sedimentation, dewatering, and drying, offering a holistic view of their significance in sludge management. Moreover, it explores the potential EPS applications, highlighting both the future directions and the challenges associated with their production.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124407"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447708","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}

{"title":"Periodic flooding alters ecological processes and carbon metabolism efficiency of riparian soil microbial communities in the three Gorges Reservoir area, China.","authors":"Yining Yang, Zhe Li, Yao Chen, Yuanyuan Zhang, Lunhui Lu","doi":"10.1016/j.jenvman.2025.124534","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124534","url":null,"abstract":"<p><p>Soil microbial communities are the most active components in the riparian biota, and are critical in driving carbon cycling. The periodic flooding in riparian zones is a primary driving force in the changes of soil microbial community structures and function. However, whether such events can induce changes in microbial carbon metabolism efficiency has not been fully revealed, especially in large reservoirs that experience counter-seasonal water level fluctuations (WLFs). In this study, high-throughput sequencing and the ¹⁸O-H₂O cultivation method were applied to investigate the soil microbial community and carbon metabolism in a tributary riparian zone in China's Three Gorges Reservoir, which has experienced large WLFs. Three elevations in the riparian zone (155, 165, and 170 m) were selected as treatments for different flooding intensities. As the frequency of flooding decreased, soil enzyme activity decreased first and then increased. In contrast, soil water content, fungal α-diversity, microbial co-occurrence network complexity, average variation degree, βNTI, and total cohesion decreased slowly. The assembly mechanism of microbial communities is primarily governed by homogeneous dispersion. This suggests that periodic flooding significantly alters microbial ecological processes. Additionally, we found that decreased extracellular enzyme activity increases microbial carbon use efficiency and decreases the metabolic quotient, promoting soil carbon storage. This study enhances our understanding of the response and mechanisms of soil microbial communities to periodic flooding. It provides a theoretical foundation for soil ecosystem management and conservation.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124534"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447756","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}

{"title":"Plant key functional traits in species adaptation and screening for vegetation restoration on coral islands.","authors":"Yuchen Xie, Yangsiding Wang, Pengcheng He, Haoping Zhang, Nan Liu, Hai Ren, Dongming Liu, Hongxiao Liu, Hongfang Lu, Shuguang Jian, Chen Wang, Qing Ye, Jian Cai, Hui Liu","doi":"10.1016/j.jenvman.2025.124545","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124545","url":null,"abstract":"<p><p>Plant functional traits and trial-error method have been used successfully in suitable species screening for vegetation restoration on tropical coral island ecosystems. However, there remains controversy about which functional traits should be used as key indicators for plant screening, and the feasibility of classifying plant types through functional traits. Here we determined 25 structural and physiological traits of a total of 56 plant species in a tropical mainland nursery and a tropical coral island, comparing differences of each trait between the two habitats. We attempted to study plant adaptations based on restoration needs and life forms, and then selected suitable species based on key functional traits related with survival performance. We found that leaf thickness, plant height, palisade and spongy tissue thickness, were four key traits in future tropical coral island restoration species screening, and listed nine suitable species from our species pool. Contrary to nursery plants employing the acquisitive strategy under sufficient resources, island plants featured more resilient leaf structure and higher antioxidant capacity, exhibiting a tolerance strategy to better cope with stresses. Meanwhile, plant functional traits rather than restoration needs or life forms are more fundamental in studying species adaptation. Plants adjusted traits from growth to tolerance strategy in the harsh island habitat, and using key functional traits is an accurate and efficient way for screening suitable species in the revegetation of degraded tropical coral islands.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124545"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447758","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}

{"title":"Catalytic solvothermal liquefaction of kitchen waste for the production of high-quality bio-oil: Effects of reusing ethanol phase as the reaction medium.","authors":"Yu Liu, Chuanhai Luo, Dwi Hantoko, Yansong Sun, Jinghao Ye, Haoyang Cao, Mi Yan","doi":"10.1016/j.jenvman.2025.124549","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124549","url":null,"abstract":"<p><p>Solvothermal liquefaction (STL) can convert kitchen waste (KW) into bio-oil without pre-drying. This study systematically investigated the effects of Fe-Ni bimetallic catalysts and recycled ethanol on enhancing bio-oil production. It also assessed the stability and reusability of the recycled catalysts, as well as the environmental benefits of STL technology. Compared to non-catalytic liquefaction, the Fe-Ni bimetallic catalysts significantly promoted the hydrodeoxygenation and esterification processes in bio-oil production. The highest yields of hydrocarbons (13.52%) and esters (69.86%) in bio-oil were achieved using the 6Fe-10Ni/Al₂O₃ catalyst. Increasing Fe loading positively facilitated the random scission of long-chain and C-C bonds, resulting in an increase in the fraction of lighter molecules in bio-oil to 74.85%. After the sixth cycle, the 6Fe-10Ni/Al₂O₃ catalyst maintained excellent stability and reusability. In comparison to fresh ethanol, the recycled ethanol significantly reduced the nitrogen and sulfur content of the bio-oil. The nitrogen of 70.45% and the sulfur of 84.67% were primarily dissolved to the aqueous phase due to the higher polarity of recycled ethanol. The results of a techno-economic assessment (TEA) and a life cycle assessment (LCA) confirmed that the STL of KW is both economically viable and environmentally friendly. The experimental findings provide valuable insights for future research on the upgrading, processing, and refining of bio-oil.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124549"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447682","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}

{"title":"Impacts of successive Chinese fir plantations on soil carbon and nitrogen dynamics: Conclusive insights from metagenomic analysis.","authors":"Huimin Zhang, Fangying Pan, Zhumei Wen, Wenwen Chen, Chuifan Zhou","doi":"10.1016/j.jenvman.2025.124510","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124510","url":null,"abstract":"<p><p>Chinese fir forests play a significant role both economically and ecologically, contributing to soil and water conservation while also serving as an efficient timber-producing species that brings economic benefits. However, the issue of soil degradation due to continuous Chinese fir planting cannot be overlooked. Continuous planting leads to a decrease in soil nutrients, a reduction in microbial diversity, and changes in microbial community composition, which in turn affect the abundance of carbon and nitrogen cycle functional genes in Chinese fir forest soils. We utilized metagenomic sequencing technology to investigate the dynamics of microbial community composition and carbon and nitrogen-related functional genes in the soils of Chinese fir forests across different plantation generations, exploring their relationship with soil carbon and nitrogen nutrients. We found that the relative abundance of bacterial communities is dominant in both phylum and genus levels within microbial communities. The partial least squares path models (PLS-PM) indicated that planting generations had a negative effect on dissolved organic carbon (DOC), nitrate nitrogen (NO₃^--N), and microbial biomass nitrogen (MBN), with a significant negative impact on microbial residual carbon (MRC). Easily utilizable carbon nutrient (DOC) in Chinese fir forest soil showed a significant positive effect on the abundance of carbon fixation functional genes (direct effect = 0.91, p < 0.01), and on the abundance of methane metabolism functional genes (direct effect = 1.27, p < 0.01). Nitrogen nutrients (NO₃^--N, MBN) in the soil also had a significant positive effect on the abundance of carbon fixation functional genes (direct effect = 0.90, p < 0.01). Bacterial communities (Acidobacteria and Verrucomicrobia) had significant negative effects on carbon and nitrogen cycling processes. The abundance of nasA and nirA genes generally showed a decreasing trend with increasing plantation generations. The decrease in available nitrogen nutrients with increased plantation generations was influenced by Assimilatory nitrogen reduction to ammonia (ANRA), an energy-consuming process. In summary, the continuous planting of Chinese fir had significant impacts on the carbon and nitrogen nutrient cycling processes, and it influenced the composition of microbial communities and the spatial distribution of functional genes. Clarifying the changes in carbon and nitrogen nutrient cycling processes in Chinese fir continuous planting provides a reference for maintaining the productivity of Chinese fir plantations.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124510"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447692","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}

{"title":"Distribution and disturbances of ditches across salt marshes of the Northeast U.S. with implications for management and restoration.","authors":"Erin K Peck, Julie E Walker, Katherine V Ackerman, Joel Carr, Maureen D Correll, Zafer Defne, Linda A Deegan, Mitchell J Eaton, Neil K Ganju, Mitch Hartley, Catherine Johnson, Jason Mercer, Katharine J Ruskin, Jonathan D Woodruff, Brian Yellen","doi":"10.1016/j.jenvman.2025.124444","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124444","url":null,"abstract":"<p><p>Effective management of valuable coastal systems, such as salt marshes requires an understanding of the complex stressors influencing their continued threat of drowning. However, efforts to determine the effects of one potential stressor, ditches, have produced diverging results complicating management efforts. Ditches (linear trenches dug to drain salt marshes for agriculture and mosquito control) alter salt marsh hydrology, but their effects on widescale marsh function and degradation are poorly understood. We created a dataset of visible ditches and summarized ditch densities (length of ditches over area) for salt marshes of the Northeast U.S. to evaluate ditching against vulnerability metrics, including elevation and the unvegetated to vegetated marsh ratio (UVVR). We identified a scale dependency in which the larger/coarser the spatial scale of analysis, the greater the fraction of ditched salt marshes. Scale dependence explains discrepancies between previously determined ditch indices. In terms of effects on marsh vulnerability, relative elevation was not influenced by visible ditch presence. Ditch densities affected UVVR, exhibiting a multiple threshold behavior. When present at low densities, ditches have little effect on ponding; yet as ditch densities increase, UVVR (i.e., ponding) increases. The relationship between ditching and UVVR reverses at the highest ditch densities, with ponding substantially decreasing. The multiple threshold vulnerability response of Northeast salt marshes to the hydrologic influences imposed by ditching suggests restoration strategies should consider the degree of ditching rather than simply ditching presence.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124444"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447705","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}

{"title":"Except for environmental protection, promoting income: An analysis of the role of outsourcing livestock manure on promoting farmers' incomes.","authors":"Kun Zhou, Zhenwang Zhang, Liu Chen, Huan Wang, Jianqiang Li","doi":"10.1016/j.jenvman.2025.124553","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124553","url":null,"abstract":"<p><p>To realize the harmless treatment and complete resource utilization of livestock manure, the Chinese government continues to promote the outsourcing livestock manure (OLM) services. Exploring OLM's impacts on farmers' incomes is of great significance to evaluate and improve the socialized service system. However, the economic effects of OLM still lack empirical support. This study collected data from 600 pig farmers and applied the ordinary least squares (OLS) method, endogenous switching regression, quantile regression, and mediation effect methods to analyze the influence mechanism of OLM on farmers' incomes. The results revealed that OLM significantly increases farmers' incomes, with those who adopt outsourcing services earning approximately 74,800 yuan more than those who do not. The main reason OLM has an income increasing effect is that it can promote large-scale farming and farming efficiency. As farmers' incomes grow, the income increasing effect of OLM has a clear inverted U shape, with the maximum effect occurring at the 50% income quantile. Meanwhile, with the increase of outsourcing degrees and expansion of the farming scale, the income increasing effect of OLM is also enhanced. After considering geographical characteristics, the analysis showed that OLM had a better income increasing effect in farms located between 500 and 1000 m above sea level. In conclusion, this study reveals the application performance of outsourced services in livestock manure treatment processing, which can help government departments to continuously promote and drive the recycling of livestock waste resources.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124553"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447706","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}

{"title":"Mapping coastal resilience: Precision insights for green infrastructure suitability.","authors":"Narcisa G Pricope, Elijah G Dalton","doi":"10.1016/j.jenvman.2025.124511","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124511","url":null,"abstract":"<p><p>Addressing the need for effective flood risk mitigation strategies and enhanced urban resilience to climate change, we introduce a cloud-computed Green Infrastructure Suitability Index (GISI) methodology. This approach combines remote sensing and geospatial modeling to create a cloud-computed blend that synthesizes land cover classifications, biophysical variables, and flood exposure data to map suitability for green infrastructure (GI) implementation at both street and landscape levels. The GISI methodology provides a flexible and robust tool for urban planning, capable of accommodating diverse data inputs and adjustments, making it suitable for various geographic contexts. Applied within the Wilmington Urban Area Metropolitan Planning Organization (WMPO) in North Carolina, USA, our findings show that residential parcels, constituting approximately 91% of the total identified suitable areas, are optimally positioned for GI integration. This underscores the potential for embedding GI within developed residential urban landscapes to bolster ecosystem and community resilience. Our analysis indicates that 7.19% of the WMPO area is highly suitable for street-level GI applications, while 1.88% is ideal for landscape GI interventions, offering opportunities to enhance stormwater management and biodiversity at larger and more connected spatial scales. By identifying specific parcels with high suitability for GI, this research provides a comprehensive and transferable, data-driven foundation for local and regional planning efforts. The scalability and adaptability of the proposed modeling approach make it a powerful tool for informing sustainable urban development practices. Future work will focus on more spatially-resolved models of these areas and the exploration of GI's multifaceted benefits at the local level, aiming to guide the deployment of GI projects that align with broader environmental and social objectives.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124511"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447737","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}

{"title":"From confrontation to co-production: How China's ENGOs facilitate residents' waste management systems.","authors":"Shuang Tan, Yu Du, Changjun Li, Yu Gong, Yanqiang Du","doi":"10.1016/j.jenvman.2025.124539","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124539","url":null,"abstract":"<p><p>Waste management has emerged as a critical challenge in multiple countries, where governance structures frequently exhibit insufficient robustness. Environmental non-governmental organizations (ENGOs), as pivotal stakeholders in this domain, must assume a more substantial role. However, their contributions have historically been perceived as limited. Whether and how ENGOs can play an important role deserves the attention of researchers. This paper investigates the evolving role of China's ENGOs through a longitudinal case study of nine organizations, examining their transition from adversarial to co-productive strategies, thereby fostering a tripartite collaboration system among government, enterprises, and residents. The findings reveal a three-phase evolution in organizational structure, issue focus, and tactical approaches, culminating in a three-cycle co-production framework for waste management. This study not only enriches co-production theory but also provides valuable insights into the critical role of ENGOs, offering practical guidance for sustainable waste governance.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124539"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447710","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}

{"title":"How Rhodococcus ruber accelerated denitrification with soybean-processing wastewater as the electron donor.","authors":"Haiyun Zhang, Yue Ma, Fei Liu, Songyun Chen, Xu Peng, Fu Chen, Yongming Zhang, Bruce E Rittmann","doi":"10.1016/j.jenvman.2025.124558","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124558","url":null,"abstract":"<p><p>Total nitrogen removal is a bottleneck for achieving acceptable effluent quality for many municipal wastewater treatment plants (WWTPs). Inadequate denitrification is often the cause of insufficient total-nitrogen removal, and a deficiency of electron donor is a frequent cause. Soybean-processing wastewater (SPW) is potential electron donor. SWP contains electron donors to drive denitrification, but they are polymers that need to be hydrolyzed first. This work evaluated how bioaugmentation with a small amount of Rhodococcus ruber accelerated denitrification with soluble SWP. Compared with normal acclimated denitrifying biomass alone, addition of 0.45% (w/w) R. ruber accelerated the NO₃^--N removal rate by 22%, and it also led to greater release of NH₄⁺-N from the breakdown of amino acids in SWP. The acceleration was attributed to the proteins and polysaccharides being more rapidly hydrolyzed, since R. ruber contained the genes for a variety of protein and polysaccharide hydrolases. Hydrolysis released simple amino acids and carbohydrates that could be oxidized by the denitrifying biomass, as well as by R. ruber. While R. ruber also could oxidize amino acids and carbohydrate via oxygen and nitrate respirations, its main role in bioaugmentation was to accelerate the first step, hydrolysis. This work introduces the practice novelty that bioaugmentation with R. ruber could accelerate denitrification and the fundamentals novelty that R. ruber accelerated denitrification by catalyzing hydrolysis of proteins and polysaccharides in SPW.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"376 ","pages":"124558"},"PeriodicalIF":8.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447713","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}