Science of the Total Environment最新文献

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Those floating materials in the northern Adriatic Sea: Observations from satellites 亚得里亚海北部的漂浮物:卫星观测
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-24 DOI: 10.1016/j.scitotenv.2025.179662
Madjid Hadjal , Brian B. Barnes , Lin Qi , Karlis Mikelsons , Menghua Wang , Chuanmin Hu
{"title":"Those floating materials in the northern Adriatic Sea: Observations from satellites","authors":"Madjid Hadjal ,&nbsp;Brian B. Barnes ,&nbsp;Lin Qi ,&nbsp;Karlis Mikelsons ,&nbsp;Menghua Wang ,&nbsp;Chuanmin Hu","doi":"10.1016/j.scitotenv.2025.179662","DOIUrl":"10.1016/j.scitotenv.2025.179662","url":null,"abstract":"<div><div>In August 2024, surface aggregations of unknown materials were captured in NOAA's OCView quick look medium-resolution satellite images over the northern Adriatic Sea (NAS), posing the question of whether these images features are caused by surface accumulation of mucilage (also called “sea snot”), red <em>Noctiluca scintillans</em> (RNS), or marine litter. All have been reported before in the NAS, which have caused various issues to fisheries and tourism. While the current effort in monitoring of the region is through monthly <em>in situ</em> sampling, inspired by these quick look satellite images, this study aims to provide a synoptic view of the various floating materials using satellite imagery between 1972 and 2024 through spectral reflectance analysis. Large-scale mucilage features were found during summer in a total of 10 years, from 1988 to 2024. RNS features were detected during spring, with the earliest event captured in 1980 and subsequent events in 1989 and 1998. Since 1998, 12 RNS events have been observed, with surface areas ranging from a few km<sup>2</sup> (1998 and 2014) to most of the NAS (2001, 2012 and 2021). Similarly, durations of the RNS events ranged from one day to three months. Both mucilage and RNS were found in the western part of the NAS, near the River Po delta. In addition, pollen was also observed in the eastern NAS and near the Kvarner Islands, occurring during May and with a recent increasing trend. The co-occurring environmental factors have also been analyzed and explored to determine what could possibly lead to these large events, but without positive findings.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179662"},"PeriodicalIF":8.2,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Response to commentary by Hollis et al. on “The development of soil health benchmarks for managed and semi-natural landscapes” 对Hollis等人关于“开发管理和半自然景观的土壤健康基准”的评论的回应
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-24 DOI: 10.1016/j.scitotenv.2025.179711
Christopher J. Feeney, David A. Robinson, Bridget A. Emmett
{"title":"Response to commentary by Hollis et al. on “The development of soil health benchmarks for managed and semi-natural landscapes”","authors":"Christopher J. Feeney,&nbsp;David A. Robinson,&nbsp;Bridget A. Emmett","doi":"10.1016/j.scitotenv.2025.179711","DOIUrl":"10.1016/j.scitotenv.2025.179711","url":null,"abstract":"","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179711"},"PeriodicalIF":8.2,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In situ occurrence and mobility of per and polyfluoroalkyl substances in soils amended with organic waste products 四氟烷基和多氟烷基物质在经有机废物修正的土壤中的原位发生和迁移
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-24 DOI: 10.1016/j.scitotenv.2025.179708
Aurélia Marcelline Michaud , Toyin Dunsin Saliu , Gabriel Munoz , Frédéric Feder , Valérie Sappin-Didier , Françoise Watteau , Sabine Houot , Sébastien Sauvé
{"title":"In situ occurrence and mobility of per and polyfluoroalkyl substances in soils amended with organic waste products","authors":"Aurélia Marcelline Michaud ,&nbsp;Toyin Dunsin Saliu ,&nbsp;Gabriel Munoz ,&nbsp;Frédéric Feder ,&nbsp;Valérie Sappin-Didier ,&nbsp;Françoise Watteau ,&nbsp;Sabine Houot ,&nbsp;Sébastien Sauvé","doi":"10.1016/j.scitotenv.2025.179708","DOIUrl":"10.1016/j.scitotenv.2025.179708","url":null,"abstract":"<div><div>We evaluated the in situ occurrence and soil-water distribution of 75 anionic, zwitterionic, and cationic <em>per</em>- and polyfluoroalkyl substances (PFAS) in soils from five field experimental sites distributed in different climatic regions in France. Four sites received agronomical doses of organic waste products (OWPs, ∼5–10 t/ha per application) with repeated inputs between 1974 and 1996 (2 historical sites) and 1998–2018 (2 on-going sites), while one site received about two-fold larger amounts. Control soils without OWP application had detectable yet low PFAS levels, the Σ75PFAS remaining in most cases below 1 μg/kg. Soils amended with municipal sludge or urban composts exhibited the largest Σ75PFAS increase relative to controls (∼2–20 μg/kg), with soils receiving biowaste composts displaying the lowest Σ75PFAS (∼2 μg/kg). In most cases, Σ75PFAS increased significantly with time. While perfluorooctane sulfonate (PFOS) typically dominated the PFAS profiles in municipal sludge-amended soils, the other prevalent PFAS classes varied with sites and years: soils from older sites also had anionic and cationic electrochemical fluorination-derived precursors (e.g., EtFOSAA and PFOSAmS), while on-going sites had increased prevalence of short-chain perfluoroalkyl carboxylates (PFCAs) (3 sites) and perfluoroalkyl phosphinates (1 site). Interestingly, 6:2 fluorotelomer sulfonamidopropyl betaine (6:2 FTAB), a major zwitterionic precursor found in French municipal sludge, was only detected at low levels in soils, indicating its transformation to degradation products. Leaching waters at a depth of 45 cm in the experimental plots had high levels of short-chain PFCAs (Mean C3-C5: 120–160 ng/L; Max C3-C5: 900–1600 ng/L), suggesting that land applied OWP containing PFCA precursors are important contributors to long-term groundwater contamination.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179708"},"PeriodicalIF":8.2,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Occurrence and environmental risk assessment of pesticides reveal important threats to aquatic organisms in precordilleran rivers of north-central Chile 农药的发生和环境风险评估揭示了智利中北部前科迪勒河中水生生物的重要威胁
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179701
Nicolas Gouin , Angéline Bertin , Daniel D. Snow , Adriana Lozada , Frédéric Grandjean , Alan S. Kolok
{"title":"Occurrence and environmental risk assessment of pesticides reveal important threats to aquatic organisms in precordilleran rivers of north-central Chile","authors":"Nicolas Gouin ,&nbsp;Angéline Bertin ,&nbsp;Daniel D. Snow ,&nbsp;Adriana Lozada ,&nbsp;Frédéric Grandjean ,&nbsp;Alan S. Kolok","doi":"10.1016/j.scitotenv.2025.179701","DOIUrl":"10.1016/j.scitotenv.2025.179701","url":null,"abstract":"<div><div>While pesticides are essential for food production, their widespread use poses environmental risks beyond lowland areas. Recent evidence indicates that mountain ecosystems are also vulnerable due to both local agriculture and long-range atmospheric transport. This study assesses pesticide contamination and ecological risks in five mountainous agricultural watersheds of north-central Chile, where pesticides support intensive crop production. Using primarily polar organic chemical integrative samplers (POCIS), complemented by sediment samples, we found pesticides at 26 of 30 sampled sites. Detection varied by location and method. Desethylatrazine, an atrazine metabolite, was most frequently found in POCIS samples, detected at 20 sites across all watersheds. While other pesticides only occurred at few sites, their presence across multiple, geographically dispersed locations contributed to extensive ecological risk. Northern watersheds (Limarí, Choapa, Aconcagua) showed the highest ecological risks, despite lower pesticide loads, due to the presence of highly toxic insecticides. Key factors influencing pesticide distribution included water conductivity, agricultural land use, and latitude. Ecotoxicological risk assessments revealed eight pesticides exceeding high-risk thresholds for aquatic organisms—mainly insecticides and fungicides. Pyrethroids such as deltamethrin, cyfluthrin, and <em>lambda</em>-cyhalothrin posed severe threats to fish and invertebrates. High-risk levels were also detected in sediments, particularly in the northernmost Limarí watershed. These findings underscore the urgent need for targeted monitoring and stricter pesticide regulation in mountain freshwater ecosystems of Chile, which are vital water sources and harbor unique biodiversity. This study provides one of the first comprehensive evaluations of pesticide risks in mountainous rivers, highlighting the ecological threats from agricultural contaminants.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179701"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Human impact on the functional diversity of Gerromorpha (Hemiptera: Heteroptera) and differential sexual dimorphism responses in Amazonian aquatic ecosystems 人类活动对亚马逊水生生态系统Gerromorpha(半翅目:异翅目)功能多样性的影响及性别二态性差异反应
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179534
Alana Patricia Meguy Guterres , Erlane José Cunha , Felipe Ferraz Figueiredo Moreira , Naiara Raiol Torres , Leandro Juen
{"title":"Human impact on the functional diversity of Gerromorpha (Hemiptera: Heteroptera) and differential sexual dimorphism responses in Amazonian aquatic ecosystems","authors":"Alana Patricia Meguy Guterres ,&nbsp;Erlane José Cunha ,&nbsp;Felipe Ferraz Figueiredo Moreira ,&nbsp;Naiara Raiol Torres ,&nbsp;Leandro Juen","doi":"10.1016/j.scitotenv.2025.179534","DOIUrl":"10.1016/j.scitotenv.2025.179534","url":null,"abstract":"<div><div>Human activities impact the morphology and function of species, especially in aquatic ecosystems. However, little is known about how these effects influence intraspecific variation associated with sexual dimorphism. Therefore, it is essential to study organisms with conspicuous intersexual variations, such as semiaquatic bugs (Hemiptera: Heteroptera: Gerromorpha). This study aimed to assess the effect of land-use changes, conventional logging, reduced-impact logging, pasture, and mining activities on the taxonomic (alpha), functional (Fric and FEve) and beta functional (βF) diversity of semiaquatic bugs, with an emphasis on sexual dimorphism. We tested the following hypotheses: (i) habitat loss reduces the diversity; (ii) larger species are associated with forested streams, while species with slower locomotion are associated with low forest cover; (iii) male βF is driven by trait richness difference, while female βF is driven by trait replacement. We sampled 77 streams in the Capim river basin (Amazon, Brazil). CL and PST streams are associated with agricultural impact and high conductivity, whereas RIL streams were similar to forested sites environmentally and in composition. Environmental filters influenced only the taxonomic composition of males. In contrast, females had longer bodies and legs in forest environments and differed in βF, mainly due to traits loss/gain. Our results highlight the importance of forest conservation and the use of economic practices that cause less damage, as well as evaluating such effects under different biodiversity approaches and including intraspecific variation.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179534"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fluctuations of CO₂ and 222Rn concentration in the karst vadose zone: Comparing exhalation, indoor concentrations, and cave air dynamics (Nerja Cave, Southern Spain) 岩溶气包带CO₂和222Rn浓度波动:比较呼出、室内浓度和洞穴空气动力学(西班牙南部Nerja洞穴)
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179723
C. Liñán , I. Vadillo , J. Benavente , S. Cañete , L. Ojeda
{"title":"Fluctuations of CO₂ and 222Rn concentration in the karst vadose zone: Comparing exhalation, indoor concentrations, and cave air dynamics (Nerja Cave, Southern Spain)","authors":"C. Liñán ,&nbsp;I. Vadillo ,&nbsp;J. Benavente ,&nbsp;S. Cañete ,&nbsp;L. Ojeda","doi":"10.1016/j.scitotenv.2025.179723","DOIUrl":"10.1016/j.scitotenv.2025.179723","url":null,"abstract":"<div><div>To investigate the influence of atmospheric and subsurface karst conditions on gas transport in the vadose zone and across the epikarst-atmosphere interface, we measured: a) radon (<sup>222</sup>Rn) and carbon dioxide (CO<sub>2</sub>) concentrations in the air of two boreholes drilled in the vadose zone, where high levels of these gases had been previously reported, and b) indoor radon concentrations in two dwellings built on potentially karstifiable lithologies. One dwelling (D1) is located near the boreholes and a major tourist cave (Nerja Cave), while the other (D2) is in the town of Nerja.</div><div>Periodic fluctuations in gas concentrations were observed in the boreholes, reflecting advective transport of atmospheric air into the subsurface (inflow) and from the vadose zone into the atmosphere (outflow). Gas transport was mainly driven by barometric pumping, whose efficiency depends on vadose zone permeability, although thermal-induced convection was also detected. Advective transport was more effective in winter than in summer. In the dwellings, high <sup>222</sup>Rn concentrations resulted from subsurface radon infiltration into the buildings. Radon transport indoors was mainly driven by depressurization of the dwellings due to temperature gradients and barometric pumping (D1), as well as wind effects and ventilation habits (D2).</div><div>The presence of large karstic cavities may play a supplemental role in the indoor radon concentrations in nearby buildings. Finally, some anomalies in vadose air radon concentrations appear to be linked to seismic activity, though further research is needed to confirm this relationship.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179723"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and numerical investigations on the fresh-saline water interface dynamics in a coastal aquifer due to saline groundwater pumping 咸水抽吸对沿海含水层淡水-咸水界面动力学的实验与数值研究
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179715
Dhanya Narayanan, T.I. Eldho
{"title":"Experimental and numerical investigations on the fresh-saline water interface dynamics in a coastal aquifer due to saline groundwater pumping","authors":"Dhanya Narayanan,&nbsp;T.I. Eldho","doi":"10.1016/j.scitotenv.2025.179715","DOIUrl":"10.1016/j.scitotenv.2025.179715","url":null,"abstract":"<div><div>In coastal aquifers, pumping from the dispersion zone extracts intruded saltwater into saline groundwater (SGW). There has been limited research on visualizing and evaluating situations when well screens capture saltwater and the extent of dilution occurring, when it is combined with freshwater within the well. The present study attempts to quantify mixing through the dissipation of salinity variance and analyze the most significant parameters contributing to various pumping situations. To examine the influence of freshwater velocity distribution on the distribution of salinity, we conducted experiments with (i) changing hydraulic gradient, (ii) with and without groundwater extraction well, and (iii) three varying pumping rates. Pumping induced changes in vertical fluxes that resulted in disparities in the length of the toe (L<sub>toe</sub>) of the wedge, salinity of pumped water, distribution of velocities, and overall mass balance. The characteristic behaviour of the system was further evaluated using a dimensional analysis which differentiated the response of the system for buoyancy dominated and balanced flow conditions. The salinity of pumped water was dependent on the freshwater flux in the vicinity. The buoyant flow regime increased salinity because seawater compensated for the pressure deficit due to proximity to the saltwater barrier, while the balanced regime decreased salinity by diluting salt flux with freshwater. The well location ratio and conductivity anisotropy reduce saltwater extent more in buoyancy-dominated flow scenarios than in balanced flow. Despite its simplified approach, the results provide insights for practitioners aiming to implement a technique of extracting SGW to restore a salinized unconfined coastal aquifer system.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179715"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Letter to the Editor regarding “Prediction of PFAS bioaccumulation in different plant tissues with machine learning models based on molecular fingerprints” by Song et al. (2024), Sci. Total Environ. 950 175091 Song et al.(2024)关于“基于分子指纹的机器学习模型预测PFAS在不同植物组织中的生物积累”的致编辑信。总环境,950 175091
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179714
Souichi Oka , Yoshiyasu Takefuji
{"title":"Letter to the Editor regarding “Prediction of PFAS bioaccumulation in different plant tissues with machine learning models based on molecular fingerprints” by Song et al. (2024), Sci. Total Environ. 950 175091","authors":"Souichi Oka ,&nbsp;Yoshiyasu Takefuji","doi":"10.1016/j.scitotenv.2025.179714","DOIUrl":"10.1016/j.scitotenv.2025.179714","url":null,"abstract":"<div><div>Song et al. (2024), “Prediction of PFAS bioaccumulation in different plant tissues with machine learning models based on molecular fingerprints,” employed machine learning methods, such as XGBoost and SHapley Additive exPlanations (SHAP), to predict PFAS bioaccumulation, reporting high predictive accuracy. However, this commentary critically examines their interpretation of feature importance, since high predictive accuracy does not guarantee reliable feature importance. Both XGBoost and SHAP are known to exhibit biases, such as overemphasizing features used in early splits and inheriting biases from the underlying model. Furthermore, the high dimensionality and potential collinearity of molecular fingerprints complicate SHAP interpretation, increasing overfitting risk and compromising SHAP value stability. To provide a general example, we conducted an independent simulation using a publicly available dataset of US industrial facilities and environmental compliance, demonstrating significant discrepancies between feature importance rankings from XGBoost and robust statistical tests. This commentary advocates for robust statistical methods coupled with <em>p</em>-values, including Spearman's rho, Kendall's tau, Goodman-Kruskal's gamma, Somers' delta, and Hoeffding's dependence, for feature selection. These non-parametric methods, which are independent of specific model assumptions and rely on data ranks, are better suited to capture complex relationships in high-dimensional data, providing a more reliable foundation for future PFAS bioaccumulation research.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179714"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improving swine wastewater anaerobic digestion via granular activated carbon, zero-valent iron, and nano-magnetite 颗粒活性炭、零价铁和纳米磁铁矿改善猪废水厌氧消化
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-23 DOI: 10.1016/j.scitotenv.2025.179736
Naassom Wagner Sales Morais , Marcos Vinícius Domingos Araújo da Silva , Rennan Guthierrez Nunes do Nascimento , André Bezerra dos Santos
{"title":"Improving swine wastewater anaerobic digestion via granular activated carbon, zero-valent iron, and nano-magnetite","authors":"Naassom Wagner Sales Morais ,&nbsp;Marcos Vinícius Domingos Araújo da Silva ,&nbsp;Rennan Guthierrez Nunes do Nascimento ,&nbsp;André Bezerra dos Santos","doi":"10.1016/j.scitotenv.2025.179736","DOIUrl":"10.1016/j.scitotenv.2025.179736","url":null,"abstract":"<div><div>Using electron-conducting materials (ECMs) is a strategy to boost anaerobic digestion (AD). However, research commonly investigates high doses of ECMs, often higher than the sludge concentration in the reactors, making AD more expensive and economically unviable. In contrast, this study evaluated the effect of granular activated carbon (GAC), zero-valent iron (ZVI), and nano-magnetite (Fe<sub>3</sub>O<sub>4</sub>) on the AD of swine wastewater (SW) at concentrations equal to or lower than the sludge content in the reactors. The biochemical methane potential (BMP) test was conducted in reactors with 100 mL of reaction volume inoculated with brewery sludge, operating in fed-batch mode in two treatment cycles, each with 35 days. The reactors were maintained at 37 ± 0.1 °C under orbital agitation of 150 rpm. ECMs were evaluated individually at concentrations of 0.4 g L<sup>−1</sup> (0.1 rECM/VSS), 2.0 g L<sup>−1</sup> (0.5 rECM/VSS), and 4.0 g L<sup>−1</sup> (1.0 rECM/VSS). CH<sub>4</sub> production kinetics were improved with 4.0 g L<sup>−1</sup> of additive. GAC promoted the absence of lag phase and increased by 52.9 % and 63.6 % the speed and maximum rate of CH<sub>4</sub> production, respectively. ZVI was the additive that most increased BMP (15.2 %) and CH<sub>4</sub> content in biogas (13.5 %). Doses higher than 0.4 g L<sup>−1</sup> of Fe<sub>3</sub>O<sub>4</sub> did not produce additional positive impacts on BMP. ECMs enriched volatile fatty acid-oxidizing syntrophic bacteria and methanogenic archaea (<em>Methanothrix soehngenii</em> and <em>Midas s 4938</em> - genus <em>Methanolinea</em>). ECMs (0.1, 0.5, and 1.0 rECM/VSS) improved the AD of SW from an inoculum not adapted to the evaluated substrate.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"984 ","pages":"Article 179736"},"PeriodicalIF":8.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deep learning-based forecasting of daily maximum ozone levels and assessment of socioeconomic and health impacts in South Korea 基于深度学习的韩国每日最大臭氧水平预测和社会经济和健康影响评估
IF 8.2 1区 环境科学与生态学
Science of the Total Environment Pub Date : 2025-05-22 DOI: 10.1016/j.scitotenv.2025.179684
Seyedeh Reyhaneh Shams, Yunsoo Choi, Deveshwar Singh, Sagun Kayastha, Jincheol Park
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