Journal of Environmental Management最新文献

{"title":"Investigation and efficiency estimation of a hydrocyclone for the treatment of primary municipal wastewater.","authors":"Konstantinos Tsamoutsoglou, Anastasios Kechagias, Vasileios E Katzourakis, Constantinos V Chrysikopoulos, Petros Gikas","doi":"10.1016/j.jenvman.2025.125134","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125134","url":null,"abstract":"<p><p>Conventional wastewater treatment is widely recognized for its high energy consumption. Several wastewater treatment plants (WWTPs) in Europe and elsewhere are aging. As a result, many WWTPs do not meet performance requirements due to the expansion of sewerage networks and the rise of wastewater flow rates. This study examines if the use of hydrocyclones for early removal of suspended solids present in municipal wastewater, upstream of the secondary treatment, can result in decreased energy demands and enhanced operational efficiency compared to a conventional WWTP. Hydrocyclones are crucial solids-liquid separation apparatuses in industry. In this study a hydrocyclone with maximum hydraulic capacity of 50 m³/d, was installed downstream of the primary clarification at the WWTP of Chania, Greece. An efficiency estimation method was employed to assess the effectiveness of hydrocyclone and predict the total suspended solids (TSS) effluent concentration as function of the influent TSS concentrations and surface overflow rate (SOR) values. It was shown that the hydrocyclone achieved a TSS removal rate ranging from 9 % to 48 %, with an average of 33 %, resulting to effluent TSS concentrations varying from 74 to 285 mg/L. The average biological oxygen demand (BOD₅) removal rate of the hydrocyclone was 19 %, with a range of 6 %-42 %, achieving effluent BOD₅ concentrations between 154 and 395 mg/L. The hydrocyclone chemical oxygen demand (COD) removal rates were estimated to vary from 2 % to 39 %, with an average of 13 %, and the effluent COD concentrations from 252 to 782 mg/L. Finally, a numerical model was proposed, which fitted the experiment data satisfactory. The implementation of the hydrocyclone system in the WWTP significantly reduces the volume of aeration tanks (9-48 %), oxygen demand (8-42 %), electricity consumption of the aeration tank (17-50 %), and secondary sludge production (11-61 %). The use of hydrocyclones to remove TSS from municipal wastewater was demonstrated to be efficient, with minimal capital and operating costs.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125134"},"PeriodicalIF":8.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750572","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":"The mechanism of lycopene alleviating cadmium-inhibited glucose uptake ability of epithelioma papulosum cyprini cells: miR-375, oxidative stress, and actin cytoskeleton dysfunction.","authors":"Yuhao Liu, Minna Qiu, Zhiyu Hao, Yuhang Liu, Shaochi Wang, Minghang Chang, Xiumei Liu, Wei Sun, Xiaohua Teng, Xinquan Wang","doi":"10.1016/j.jenvman.2025.125143","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125143","url":null,"abstract":"<p><p>Cadmium (Cd) poses a threat to fish and human health. Carp is the most widely farmed fish, and it is necessary to study the mechanism of Cd toxicity and effective mitigation methods for Cd poisoning in carps. We previously found that Cd up-regulated miR-375 in common carp spleens, and that IRS1, a factor involved in glucose (GLU) uptake, was a potential target gene of miR-375. However, whether Cd can decrease GLU uptake ability in fish remains unknown. Oxidative stress (OS) and actin cytoskeleton dysfunction (ACD) can take part in the mechanisms of GLU uptake ability reduction. Lycopene (Lyc) is a natural plant antioxidant, and epithelioma papulosum cyprini (EPC) cells are a model cell to study carps. Therefore, we conducted experiments with Cd or/and Lyc treatments to investigate the mechanisms of Lyc alleviating Cd-cytotoxicity on EPC cells from the perspectives of miR-375, OS, ACD, and GLU uptake ability. We found that Lyc mitigated Cd-caused miR-375 increase, OS, ACD, and GLU uptake ability reduction. Moreover, miR-375 overexpression/knockdown experiments demonstrated that miR-375 mediated OS, ACD, and GLU uptake ability reduction and targeted regulated IRS1-PI3K-AKT. Furthermore, NAC intervention experiment demonstrated that ROS mediated ACD and the reduction of GLU uptake via ROS/IRS1-PI3K-AKT. Taken together, Lyc alleviated Cd-decreased GLU uptake ability via miR-375-ROS/IRS1-PI3K-AKT and miR-375/IRS1-PI3K-AKT pathways in EPC cells. Our findings highlighted significant role of miR-375 in Cd-induced toxicity and elucidated the mechanism by which Lyc alleviated Cd-induced toxicity. Our study can provide new information and new targets for resisting environmental pollutant stress in animals.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125143"},"PeriodicalIF":8.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750646","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":"Implications of the different submerged extent of typical sandbars to local DOM and SDOM during the pre-flood season in the middle reaches of Yangtze River.","authors":"Haoyang Shi, Hui Guo, Wenjun Yang, Chengcheng Bao, Xinxin Zhu, Sheng Bi, Yu Hu, Ting Li","doi":"10.1016/j.jenvman.2025.125148","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125148","url":null,"abstract":"<p><p>In large rivers, sandbar evolution is mainly driven by changes in discharge, flow velocity, and sediment concentration in the water, which can shape the implications of local dissolved organic matter (DOM) and sediment dissolved organic matter (SDOM). After the completion of the Three Gorges Dam (TGD), the water level in the middle reaches of the Yangtze River changes rapidly during the year, and the submerged extent of the Yangtze River sandbars are significantly affected by the change in water level, so that when the water level rises to the defense level or higher, the sandbars may be completely submerged. As a result, different submerged extent such as periodically and long-term have occurred on the typical sandbars. However, the extent to which the submersion of typical sandbars affects the source, composition and content of regional DOM/SDOM in large rivers remains unclear. This study was conducted in the middle reaches of the Yangtze River, the characteristics, sources, and influencing factors of DOM were studied using methods such as three-dimensional fluorescence spectrum (EEMS) and parallel factor analysis (PARAFAC) to ascertain the response mechanisms of DOM/SDOM distribution patterns in different submerged extents of the Sanba Sandbar (SBS) and Wugui Sandbar (WGS). The results indicated that the source and component characteristics of DOM/SDOM from different submerged extents in typical sandbars exhibited some differences and similarities. The sediment conditions of the local sandbars, physicochemical parameters of the water, and human activities jointly controlled the DOM/SDOM characteristics of the local sandbars. The DOM of long-term submerged sandbars is generated by mixed endogenous and exogenous inputs; its fractions are more complex, and protein-like proteins are the main components; however, periodically submerged sandbars are dominated by inputs from terrestrial sources, and DOM is relatively more strongly humified, hydrophobic, and aromatic. Sediment dissolved organic matter (SDOM) is an important organic component in sediments, which has an important impact on the ecological environment of the water, the material cycle and the migration of pollutants. The endogenous characteristics of SDOM of sandbars with different submerged extents are evident, mostly in the form of land-source inputs; SDOM is similarly dominated by protein-like humus with a relatively high percentage on periodically submerged sandbars. However, the SDOM component of long-term submerged sandbars is more complex than that of periodically submerged sandbars, and SDOM has more hydrophobic and aromatic properties. This study is the first to analyze the DOM and SDOM of typical sandbars in the middle reaches of the Yangtze River, offering new insights into the characteristics and influencing factors of DOM and SDOM in this region, as well as its distribution in large rivers.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125148"},"PeriodicalIF":8.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750565","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":"A scalable framework for harmonizing, standardization, and correcting crowd-sourced low-cost sensor PM_2.5 data across Europe.","authors":"Amirhossein Hassani, Vasileios Salamalikis, Philipp Schneider, Kerstin Stebel, Núria Castell","doi":"10.1016/j.jenvman.2025.125100","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125100","url":null,"abstract":"<p><p>Citizen-operated low-cost air quality sensors (LCSs) have expanded air quality monitoring through community engagement. However, still challenges related to lack of semantic standards, data quality, and interoperability hinder their integration into official air quality assessments, management, and research. Here, we introduce FILTER, a geospatially scalable framework designed to unify, correct, and enhance the reliability of crowd-sourced PM_2.5 data across various LCS networks. FILTER assesses data quality through five steps: range check, constant value detection, outlier detection, spatial correlation, and spatial similarity. Using official data, we modeled PM_2.5 spatial correlation and similarity (Euclidean distance) as functions of geographic distance as benchmarks for evaluating whether LCS measurements are sufficiently correlated/consistent with neighbors. Our study suggests a -10 to 10 Median Absolute Deviation threshold for outlier flagging (360 h). We find higher PM_2.5 spatial correlation in DJF compared to JJA across Europe while lower PM_2.5 similarity in DJF compared to JJA. We observe seasonal variability in the maximum possible distance between sensors and reference stations for in-situ (remote) PM_2.5 data correction, with optimal thresholds of ∼11.5 km (DJF), ∼12.7 km (MAM), ∼20 km (JJA), and ∼17 km (SON). The values implicitly reflect the spatial representativeness of stations. ±15 km relaxation for each season remains feasible when data loss is a concern. We demonstrate and validate FILTER's effectiveness using European-scale data originating from the two community-based monitoring networks, sensor.community and PurpleAir with QC-ed/corrected output including 37,085 locations and 521,115,762 hourly timestamps. Results facilitate uptake and adoption of crowd-sourced LCS data in regulatory applications.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125100"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750440","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":"Dynamics in action: Exploring economic impacts of drought through a systemic approach.","authors":"Nunzia Gabriella Fasolino, Emilia Pellegrini, Meri Raggi, Davide Viaggi","doi":"10.1016/j.jenvman.2025.125111","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125111","url":null,"abstract":"<p><p>Droughts are generally associated with direct and indirect impacts, but their relationships and propagation dynamics are often unknown. This study aims to fill this research gap by exploring the spill-over effects of drought impacts across systems and, in doing so, identifying leverage points within the systems to promote effective mitigation strategies. To achieve these objectives, the effects of the 2022 drought in a portion of the Po River Basin District are analysed through a qualitative application of the System Dynamics methodology called Causal Loop Diagrams, systemic representations that can effectively capture the interdependencies across complex subsystems. The findings reveal that the drought increased production costs across all the water-using sectors due to higher energy demands driven by energy-intensive activities such as irrigation, pumping and potabilization. The empirical results offer a novel insight into the identification and propagation of impacts, providing further evidence on the water-energy nexus. Therefore, policy approaches that enhance blue and green water reserves, while addressing their interconnections, are encouraged for mitigating drought impacts. This underscores the importance of adopting a proactive approach in drought management rather than reactive responses during the occurrence of extreme events. Finally, in fields characterized by high policy fragmentation, such as water policy, the study demonstrates how representing the system behaviour through causal maps can support the integration of different sectoral policies, providing decision-makers with tools to evaluate and address the complexity of droughts.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125111"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750469","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":"Enhancing methane production from pistachio skin via optimized hydrothermal-alkaline pretreatment and Autoregressive Integrated Moving Average modeling.","authors":"Halil Şenol, Emre Askın Elibol, Francesco Bianco, Marco Race","doi":"10.1016/j.jenvman.2025.125121","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125121","url":null,"abstract":"<p><p>Lignocellulosic waste materials represent one of the renewable energy sources that is both sustainable and eco-friendly. These wastes are often improperly managed and could be energetically valorized through anaerobic digestion. However, lignocellulosic waste is known to be resistant to biodegradation due to hemicellulose and lignin and, therefore, needs a pretreatment process. In this context, this is the first study focusing on the enhancement of methane production from pistachio skin (PS), emphasizing the hydrothermal (HT) and alkaline (A) pretreatments employed separately and in combination to improve PS digestibility. HT pretreatments were performed within the temperature range of 60-100 °C, whereas A pretreatments involved sodium hydroxide concentration in the 1-10 % range. After the pretreatment phase, a 30-d anaerobic digestion was carried out under mesophilic conditions (i.e., at 37 ± 1 °C) to evaluate the cumulative methane yields (CMY). This strategy led to a significant increase (p < 0.05) of CMY (i.e., up to 415.4 mL CH₄/g volatile solids) after a combined HT-A pretreatment at 5 % NaOH and 100 °C compared to control (i.e., 192.5 mL CH₄/g volatile solids), followed by removal of 49 and 40 % of lignin and hemicellulose, respectively. An Auto-Regressive Integrated Moving Average, a time series model valued for enhancingthe model creation and its statistical properties, was also developed to estimate CMY. This work proved implementing pretreatment strategies can lead to a viable technique for sustainable energy production and waste handling in the pistachio industry.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125121"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750477","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":"A fuzzy decision-making model for enhancing sustainable tourism investments in climate-vulnerable destinations.","authors":"Muhammad Shahbaz, Serhat Yüksel, Serkan Eti, Hasan Dinçer, Shoh-Jakhon Khamdamov","doi":"10.1016/j.jenvman.2025.125151","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125151","url":null,"abstract":"<p><p>This study aims to determine key investment strategies for the performance improvements of the sustainable tourism investment projects. First, the significance levels of experts are computed via dimensionality reduction algorithm. Next, the indicators for sustainable tourism investments are weighted by spherical fuzzy Markov chain. Finally, strategy alternatives for climate-vulnerable destination selection are ranked with spherical fuzzy combinative distance-based assessment (CODAS). Moreover, our ranking results are also compared by using spherical fuzzy ranking technique by geometric mean of similarity ratio to optimal solution (RATGOS). Our findings denote that the improvement of technological infrastructure is determined as the most important factor in the development of sustainable tourism investments. Another important issue in the development of sustainable tourism investments is the determination of environmental priorities. On other side, the optimal strategy alternatives for climate-vulnerable destination selection are financial supports for climate changing and ecological evaluations for renewable energy sources.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125151"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750464","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 government green fund reduce corporate carbon emissions.","authors":"Xueqin Li, Zhuoji Zheng, Daqian Shi, Xianfeng Han","doi":"10.1016/j.jenvman.2025.124999","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.124999","url":null,"abstract":"<p><p>In the context of developing a diversified green finance system, it is crucial to enhance the innovation of equity-based green financial instruments and accelerate the transition towards sustainable development models. Using tax survey data from 2007 to 2016 and manually collected fund investment data, the study explores the impact of China's Government Green Fund on corporate carbon emissions. The findings show that: (1) Government Green Fund plays a pivotal role in reducing corporate carbon emissions, with a notable decline observed after companies receive investment. (2) The fund generates multiple effects: a resource effect through its synergy with private venture capital; an innovation effect as companies engage in green, low-carbon R&D, both independently and collaboratively; and a structural effect as high-carbon enterprises exit the market and green enterprises expand. Collectively, these mechanisms contribute to significant carbon emissions reduction. (3) The impact of the Government Green Fund on reducing carbon emissions is more pronounced in regions with weaker low-carbon environmental regulations, fewer financial resources, and higher public environmental awareness. This study addresses the limitations of prior research, which has predominantly focused on debt-based financing instruments and supportive industrial policies. Consequently, it provides crucial empirical evidence for accelerating China's development of a modern green finance system and promoting a low-carbon development model.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"124999"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750495","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":"Resilience to flow variability of an open-air green wall for greywater treatment.","authors":"E Costamagna, A Rizzo, S Fiore, F Boano","doi":"10.1016/j.jenvman.2025.125114","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125114","url":null,"abstract":"<p><p>Water management in urban areas is challenged by climate change and increasing population, and the reduction of water consumption in urban areas is becoming a major issue. Thus, domestic greywater (GW) can be a valuable water source for non-potable purposes, coupled with the benefits provided by a nature-based treatment approach. In this context, green walls have been proposed for GW treatment and local reuse, hence coupling the advantage of GW reuse with the benefits provided by a nature-based treatment approach. The amount of available GW is linked with the occupancy and habits of the inhabitants, but there is still limited knowledge on the impact of variations of GW flow rate on the treatment efficiency and on the health of the green wall. Therefore, this study aims to test the resilience of a modular green wall to variations in GW flow rate over 7 months. The experiments were performed on two configurations fed with synthetic GW: one was fed with a constant flow rate (equivalent to daily GW production per capita) as a reference, while the other received a variable flow schedule. The variable schedule included three phases: underload (-50 %), overload (+50 %) and maintenance flow. Input and output water were analysed to evaluate the treatment performances on fourteen physical-chemical parameters. Results showed that neither underload nor maintenance caused any detrimental effect on GW treatment efficiency or plants. Overload conditions caused a slight decrease in the treatment efficiency (e.g., 93.8 % for BOD₅ compared to 100 % recorded in the control configuration), and plants exhibited visual signs of distress. However, these negative effects disappeared after re-establishing the standard flow rate. These findings demonstrated the resilience of green walls to inflow rate variations. The results provide useful indications for the application of green walls for GW treatment and provide important indications for design guidelines, in terms of maximum values of organic loading rate (∼20 g_BOD5 m^-2 d^-1) and oxygen transfer rate (∼15 g_O2 m^-2 d^-1), and focusing on building maximum capacity as driving parameter.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125114"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750618","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":"Long-term water quality dynamics and influencing factors under ecological compensation mechanisms: A case study of China's first cross-provincial ecological compensation watershed.","authors":"Haitao Chen, Chengcheng Wang, Zhifeng Lv, Yan Zhong, Qiuru Ren, Jiaxue Ren, Zhe Nan, Yuqiu Wang, Xia Liu, Liancong Luo","doi":"10.1016/j.jenvman.2025.125142","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125142","url":null,"abstract":"<p><p>Despite the widespread implementation of watershed ecosystem payment schemes globally, their specific impacts on water quality remain inadequately characterized. This study quantifies long-term (1988-2020) nitrogen (N) and phosphorus (P) inputs and riverine N and P dynamics (2000-2020) to discern trends in water quality changes and to comprehensively consider the impacts of ecological compensation (EC) practices, legacy nutrient sources, and climatic conditions on water quality in China's first cross-provincial EC pilot watershed. The results indicate that EC practices are effective in reducing source inputs and improving water quality, as evidenced by significant reductions in net anthropogenic N and P inputs (1.17-fold and 1.42-fold reductions) and ammonia N concentrations and loads during the EC period. However, the limited improvements in riverine N and P levels highlight the potential impact of legacy nutrients and precipitation on water quality. Notably, the observed potential lag times for N (7-12yr) and P (8-12yr) somewhat delayed water quality improvements, while increased precipitation may result in more pollutants being released from soil or groundwater, thus masking water quality improvement signals. Overall, this work demonstrates the critical role of EC in improving water quality, while also emphasizing the need to consider legacy nutrient sources and climate impacts when implementing management measures.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"380 ","pages":"125142"},"PeriodicalIF":8.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143750576","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}