环境科学与生态学最新文献_第4页

Depth- and season-resolved characteristics and drivers of marine heatwaves in the East Sea (Sea of Japan) 东海（日本海）海洋热浪的深度和季节分辨特征及其驱动因素

IF 3.2 3区环境科学与生态学

Marine environmental research Pub Date : 2025-08-05 DOI: 10.1016/j.marenvres.2025.107418

Seongsik Park , Kyunghoi Kim

{"title":"Depth- and season-resolved characteristics and drivers of marine heatwaves in the East Sea (Sea of Japan)","authors":"Seongsik Park , Kyunghoi Kim","doi":"10.1016/j.marenvres.2025.107418","DOIUrl":"10.1016/j.marenvres.2025.107418","url":null,"abstract":"<div><div>Marine heatwaves (MHWs)—events of anomalously high ocean temperatures—are intensifying globally, yet most studies have focused on summer surface events, overlooking their vertical structure and seasonal variability. Here, we present a depth- and season-resolved assessment of MHWs in the East Sea (Sea of Japan) using in-situ observations (2000–2016) alongside multi-decadal reanalysis products (1982–2021). The results reveal pronounced vertical asynchrony: MHWs frequently occur in either the upper (5 m) or lower (60 m) layers, but rarely in both simultaneously. Unlike summer upper-layer MHWs driven by high air temperatures and strong stratification, winter lower-layer MHWs occur when strong winds deepen the mixed layer and push warm surface water downward. In addition, summer MHWs in the lower layer are strongly associated with the northward intrusion of the East Korea Warm Current (EKWC), with interannual variations in its path and intensity modulating subsurface temperature extremes. Long-term trends show that the frequency, duration, and intensity of surface MHWs around the Korean Peninsula have all increased since 1982, with the steepest trends occurring in the East Sea, particularly after 2017. These findings underscore the importance of considering both vertical and seasonal dynamics in MHW assessments and highlight the combined roles of stratification, wind-driven mixing, and warm-current advection in generating thermal extremes in marginal seas.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"Article 107418"},"PeriodicalIF":3.2,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Biodegradation of bioplastic polycaprolactone by marine bacterium Alteromonas sp. ghpt-2 and its adaptive responses 海洋细菌Alteromonas sp. ghpt-2降解生物塑料聚己内酯及其适应性响应

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-08-05 DOI: 10.1016/j.marpolbul.2025.118494

Guang-Feng Kan , He Lyu , Xiao-Fei Wang , Yue-Xin Li , Kai Yu , Hong Zhang , Ying-Ying Wang , Yan-Xiao Jiang , Jie Jiang

{"title":"Biodegradation of bioplastic polycaprolactone by marine bacterium Alteromonas sp. ghpt-2 and its adaptive responses","authors":"Guang-Feng Kan , He Lyu , Xiao-Fei Wang , Yue-Xin Li , Kai Yu , Hong Zhang , Ying-Ying Wang , Yan-Xiao Jiang , Jie Jiang","doi":"10.1016/j.marpolbul.2025.118494","DOIUrl":"10.1016/j.marpolbul.2025.118494","url":null,"abstract":"<div><div>Biodegradable plastics have been developed and applied over the past thirty years, and their biodegradation has drawn much attention. In this study, the marine bacterium <em>Alteromonas</em> sp. ghpt-2 was identified to degrade polycaprolactone (PCL) effectively. The optimized degradation conditions were temperature 15 °C, pH 8.0, carbon source of maltose and NaCl concentration of 0–3 %, resulting in enhancing the degradation rate to 9.25 %. The alteration of PCL film was represented after bacterial degradation by differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). After incubation with PCL, the metabolic pathways of strain ghpt-2 were downregulated including ribosome, Tricarboxylic Acid (TCA) cycle, glyoxylate and dicarboxylate metabolism, etc., which affected the cell growth and multiplication. In contrast, the upregulated nitrogen metabolism and ATP-Binding Cassette (ABC) transporters pathway relieved the PCL stress and maintained the bacterial growth. By metabolic pathways analysis, the PCL biodegradation process was proposed including biofilm formation, biodeterioration and assimilation. In this study, a low-temperature and NaCl-tolerant PCL degrading bacterium was obtained that could be applied in the treatment of plastic waste, including the adversity of cold and high salinity.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118494"},"PeriodicalIF":4.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Hydraulic residence time thresholds and seasonal regimes governing DOM transformation in upper Yangtze River cascading reservoirs 长江上游级联水库DOM转化的水力停留时间阈值和季节机制

IF 12.4 1区环境科学与生态学

Water Research Pub Date : 2025-08-05 DOI: 10.1016/j.watres.2025.124325

Wenjuan Ouyang , Yinjie Zhao , Zhe Li , Hao Yin , Lunhui Lu , Yuanyuan Zhang

{"title":"Hydraulic residence time thresholds and seasonal regimes governing DOM transformation in upper Yangtze River cascading reservoirs","authors":"Wenjuan Ouyang , Yinjie Zhao , Zhe Li , Hao Yin , Lunhui Lu , Yuanyuan Zhang","doi":"10.1016/j.watres.2025.124325","DOIUrl":"10.1016/j.watres.2025.124325","url":null,"abstract":"<div><div>The molecular characteristics and biogeochemical transformations of riverine dissolved organic matter (DOM) have a significant impact on carbon cycling in freshwater ecosystems. Although individual dams influence DOM dynamics, the cumulative effects of sequential reservoir systems remain unclear. This study investigates five consecutive reservoirs along the Yangtze River through seasonal sampling (2021–2022). We introduce the concept of cumulative hydraulic residence time (cHRT), which represents the sequential water retention in a low-interference cascade reservoir. Our findings demonstrate that cascade damming amplifies the effects of individual reservoirs. Specifically, in longer cHRT with cooler water, preferential degradation of labile and oxygen-rich components leads to refractory DOM accumulation. Conversely, in shorter cHRT with warmer water, biosynthesis predominates, resulting in the production of nitrogen-/phosphorus-rich DOM with higher hydrogen-to-carbon ratios. System equilibria occur at critical cHRT thresholds (∼10 days) in low-interference environments. Contrastingly, the Three Gorges Reservoir exhibits altered dynamics under significant anthropogenic pressures, where energy-intensive processes accumulate low-molecular-weight and sulfur-rich saturated DOM. Our results reveal three operational regimes: 1) biodegradation-driven buildup of refractory compounds during prolonged cold retention, 2) productivity-driven formation of heteroatom-rich components under warm transient conditions, and 3) anthropogenic signals dominance in heavily modified systems. The cHRT framework quantitatively identifies the critical transition points of DOM evolution in reservoir cascades, advances predictive understanding of carbon cycling in regulated river networks, and informs sustainable dam management.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"287 ","pages":"Article 124325"},"PeriodicalIF":12.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771736","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

Decoding periodate-driven phototransformation of dissolved organic matter in sunlit waters: Multidimensional property shifts and molecular network reconfiguration 解读阳光照射下水体中溶解有机物的高碘酸盐驱动的光转化：多维性质转移和分子网络重构

IF 12.4 1区环境科学与生态学

Water Research Pub Date : 2025-08-05 DOI: 10.1016/j.watres.2025.124331

Kaiting Zhang , Ruiqi Zheng , Lihua Li , Bin Jiang , Mingbao Feng

{"title":"Decoding periodate-driven phototransformation of dissolved organic matter in sunlit waters: Multidimensional property shifts and molecular network reconfiguration","authors":"Kaiting Zhang , Ruiqi Zheng , Lihua Li , Bin Jiang , Mingbao Feng","doi":"10.1016/j.watres.2025.124331","DOIUrl":"10.1016/j.watres.2025.124331","url":null,"abstract":"<div><div>Residual periodate (PI) from advanced oxidation processes poses emerging threats to aquatic carbon cycling, yet its role in reprogramming the phototransformation of dissolved organic matter (DOM) remains poorly understood. Here, we reveal the multidimensional effects of PI residues (20.0–300.0 μM) on DOM under solar irradiation by real-time photophysical, electrochemical, and photochemical tracking; molecular reactomics via FT-ICR MS with paired mass distance networks; and interpretable machine learning. PI residues induced aromatic structure fragmentation, reductions in apparent molecular weight, and increases in redox capacity by 1.4–3.6 times. The solar/PI system enhanced photochemical reactivity, elevating the quantum yields of <sup>3</sup>DOM* (humic acid (HA): 0.50→0.75; Suwannee River HA (SRHA): 0.78→1.44) and <sup>•</sup>OH (HA: 1.85→2.38; SRHA: 1.82→3.19) via quinone-mediated pathways. Propertied correlations varied depending on the DOM source. Molecular reactomics revealed PI-driven C<img>N bond cleavage (18.18 % increase in N-group removal) and the polymerisation of small molecules (e.g., tannins accumulated by 8.5 %) in contrast to natural photoageing. SHAP analysis using XGBoost further highlighted the significance of nitrogen and bidirectional control of the O/C ratio. These findings redefine DOM transformation mechanisms in carbon–nitrogen cycling towards N-centred under anthropogenic oxidant stress, accelerating dissolved organic nitrogen production, and increasing the risk of nitrogenous disinfection by-products.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"287 ","pages":"Article 124331"},"PeriodicalIF":12.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771737","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

Assessing the impact of urban form on PM2.5 concentration along roads in a city with mobile monitoring and machine learning models 利用移动监测和机器学习模型评估城市形态对城市道路沿线PM2.5浓度的影响

IF 6.1 2区环境科学与生态学

Ecotoxicology and Environmental Safety Pub Date : 2025-08-05 DOI: 10.1016/j.ecoenv.2025.118789

Mingyue Xi , Xuegang Chen , Jiayu Fan

{"title":"Assessing the impact of urban form on PM2.5 concentration along roads in a city with mobile monitoring and machine learning models","authors":"Mingyue Xi , Xuegang Chen , Jiayu Fan","doi":"10.1016/j.ecoenv.2025.118789","DOIUrl":"10.1016/j.ecoenv.2025.118789","url":null,"abstract":"<div><div>Due to urbanization, air pollution has become one of the most serious environmental problems, threatening human health and causing adverse effects on other environments. In order to improve air quality, it is necessary to analyze the relationship between urban form and air pollution and propose optimization strategies. This study is dedicated to collecting PM<sub>2.5</sub> concentration data on different grades of roads through mobile monitoring technology, which is then corrected using national fixed monitoring stations. At the same time, combining the meteorological data obtained during the experiment by fixed-point monitoring, RF model was used to deeply analyze the influence of urban form on PM<sub>2.5</sub> concentration, providing a scientific and effective reference basis for urban planning. The results showed that the PM<sub>2.5</sub> concentration in autumn was significantly higher than that in summer, and the pollution in the southern region was heavier than that in the northern region. The influence of different urban forms on buffer radius is different. Mean building height, population density, floor area ratio and impervious surface proportion are the key urban form indicators affecting PM<sub>2.5</sub>. In future urban planning, it is recommended to reasonably control building heights within a 500-meter buffer zone along roads, optimize urban building layouts, and promote population relocation from old urban areas to expand urban green space and alleviate PM<sub>2.5</sub> pollution in Urumqi. Therefore, quantitative analysis of the relationship between PM<sub>2.5</sub> concentrations and urban form elements can assist decision-makers in urban planning and management.</div></div>","PeriodicalId":303,"journal":{"name":"Ecotoxicology and Environmental Safety","volume":"303 ","pages":"Article 118789"},"PeriodicalIF":6.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772056","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}

引用次数: 0

Inhibition of Daphnia pulex swimming behavior by volatile petroleum products: Optical monitoring in a novel sealed chamber 挥发性石油产品对水蚤游动行为的抑制：一种新型密封室的光学监测

IF 8.1 2区环境科学与生态学

Chemosphere Pub Date : 2025-08-05 DOI: 10.1016/j.chemosphere.2025.144605

Zoha Siddiqua , Dima Awad , Paul Dobry , Kishore Gopalakrishnan , Shawn P. McElmurry , Donna R. Kashian , Tracie R. Baker , David K. Pitts

{"title":"Inhibition of Daphnia pulex swimming behavior by volatile petroleum products: Optical monitoring in a novel sealed chamber","authors":"Zoha Siddiqua , Dima Awad , Paul Dobry , Kishore Gopalakrishnan , Shawn P. McElmurry , Donna R. Kashian , Tracie R. Baker , David K. Pitts","doi":"10.1016/j.chemosphere.2025.144605","DOIUrl":"10.1016/j.chemosphere.2025.144605","url":null,"abstract":"<div><div>Since volatile organic chemicals (VOCs) evaporate at room temperatures, concentration-response studies are challenging in conventional assay systems, and new methods are needed to evaluate the effects of exposure that minimize VOC loss. In this study, the effects of three VOCs, benzene, toluene, and ethylbenzene on <em>Daphnia pulex</em> swimming behavior were evaluated. A novel bioassay system consisting of a sealed single-well cylindrical stainless-steel chamber with a glass bottom and top permit infrared light transmission and recording of movement with a digital camera. Exposure to increasing concentrations of toluene, benzene and ethylbenzene in water media significantly affected swimming behavior by decreasing swimming distance and increasing turning behavior. This novel assay system enables the study of VOCs at consistent exposure levels, and an upgraded multi-well version will increase throughput to test VOC mixtures for potential interactions among constituents that affect behavioral and transcriptomic responses.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"385 ","pages":"Article 144605"},"PeriodicalIF":8.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772527","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}

引用次数: 0

Vision-based volumetric estimation of localized construction and demolition waste 基于视觉的局部建筑和拆除垃圾体积估计

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-08-05 DOI: 10.1016/j.wasman.2025.115046

Ashwani Jaiswal , Kunal Jha , Nikhil Bugalia , Quang Phuc Ha

{"title":"Vision-based volumetric estimation of localized construction and demolition waste","authors":"Ashwani Jaiswal , Kunal Jha , Nikhil Bugalia , Quang Phuc Ha","doi":"10.1016/j.wasman.2025.115046","DOIUrl":"10.1016/j.wasman.2025.115046","url":null,"abstract":"<div><div>Accurate estimation of the quantity of localized construction and demolition waste (CDW) is critical for optimizing the upstream operations of the CDW’s reverse supply chain (RSC). However, existing studies extensively focus on downstream RSC operations with approaches that quantify large-scale material stockpiles through semi-automated workflows relying on expensive, non-portable devices. These approaches are impractical for upstream operations such as quantifying small-scale, localized CDW stockpiles scattered around urban environments, requiring frequent estimations. In contrast, this study proposes a novel vision-based framework that enables automated, fast, and accurate volume estimation of small-scale localized CDW using a consumer-grade imaging device. The framework incorporates a hybrid segmentation technique involving a ground plane identification process through a novel rule-based modification to the Random Sample Consensus (RANSAC) algorithm, followed by a clustering process. A new Multi-View Classification Model (MVCM) based on ResNet-50 architecture is also developed to recognize CDW clusters. A Delaunay triangulation-based approach estimates the volume of recognized CDW clusters. The framework is developed and validated using one of the most extensive datasets comprising 184 scans from the laboratory and the field environment. The MVCM achieved a high F1 score of 0.97 for identifying CDW using 3500 images. The framework demonstrates high accuracy for volume estimation, achieving an absolute percentage error (APE) of 8.97% compared to manual measurements. The overall process achieves an end-to-end processing time of 11 min, underscoring its efficiency and suitability for field deployment. The proposed framework is of significant practical value for localized CDW quantification and decision-making in upstream RSC operations.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"206 ","pages":"Article 115046"},"PeriodicalIF":7.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773039","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}

引用次数: 0

Research on the response mechanism of sodium ions in the soil with high-efficiency exfoliated layered nano-biochar 高效剥落层状纳米生物炭对土壤中钠离子的响应机制研究

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-08-05 DOI: 10.1016/j.psep.2025.107681

Tingting Cao , Wei Wang , Hang Zhou , Jiaqi Wang , Jinbin Li , Yan Xu

{"title":"Research on the response mechanism of sodium ions in the soil with high-efficiency exfoliated layered nano-biochar","authors":"Tingting Cao , Wei Wang , Hang Zhou , Jiaqi Wang , Jinbin Li , Yan Xu","doi":"10.1016/j.psep.2025.107681","DOIUrl":"10.1016/j.psep.2025.107681","url":null,"abstract":"<div><div>This study aims to explore the resource utilization of agricultural waste straw and the dual objectives of sodium ion mitigation in saline-alkali soil. By employing a stepwise acidification process followed by multiple instantaneous pyrolysis, we successfully produced a high-efficiency exfoliated layered nano-biochar. This biochar is designed to mitigate the detrimental effects of sodium ions on crops in saline-alkali environments. The modified biochar is rich in functional groups such as C<img>O, C-O, -OH, and C-H, which enhance its adsorption properties through an increased specific surface area, pore volume, and pore size. When applied to saline-alkali land, sodium ions in the soil migrate to the biochar, significantly improving the leaching of sodium ions. The concentration of sodium ions in the leachate increases by 7.68–100.63 % at the initial stage of leaching. Furthermore, the use of this biochar positively influenced the emergence rates of corn and soybean, reducing their emergence times by 0.48–1.43 days and 1.68–2.76 days, respectively. Additionally, the application of this material led to a substantial increase in chlorophyll content (1.25–2.28 times), enhanced plant height (20.2–102.4 %), and increased fresh weight of crops (17.1–62.1 %). Importantly, it also significantly reduced the physiological damage caused by sodium ions in saline soil. The production and application of this biochar primarily influence the emissions of primary energy demand and marine aquatic ecotoxicity, with electricity and nitric acid being the main pollutants associated with these emissions. Overall, the resource utilization of wheat straw not only mitigates the greenhouse gas emissions associated with straw incineration but also helps remediate soil degradation, yielding notable positive environmental impacts.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"202 ","pages":"Article 107681"},"PeriodicalIF":7.8,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773153","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}

引用次数: 0

Polyethylene degradation mediated by Klebsiella variicola isolated from the gut of insect larvae 昆虫幼虫肠道分离的水痘克雷伯菌介导聚乙烯降解

IF 4.1 2区环境科学与生态学

International Biodeterioration & Biodegradation Pub Date : 2025-08-05 DOI: 10.1016/j.ibiod.2025.106182

Jing Hu , Bowen Peng , Zao Liu , Tong Long , Wa Gao , Yongze Wang , Xiaonan Liu , Jinfang Zhao

{"title":"Polyethylene degradation mediated by Klebsiella variicola isolated from the gut of insect larvae","authors":"Jing Hu , Bowen Peng , Zao Liu , Tong Long , Wa Gao , Yongze Wang , Xiaonan Liu , Jinfang Zhao","doi":"10.1016/j.ibiod.2025.106182","DOIUrl":"10.1016/j.ibiod.2025.106182","url":null,"abstract":"<div><div>The biodegradation of polyethylene (PE) presents a promising approach to resolve plastic waste pollution, yet research achievements in this field are relatively scarce. In this study, two PE-degrading strains, <em>Klebsiella variicola</em> ZB-1 and <em>Pseudomonas fulva</em> ZH-2, were isolated from the gut microbiota of <em>Spodoptera frugiperda</em> larvae, and ZB-1 achieved a remarkable 9.79 ± 1.41 % weight loss of low-density polyethylene (LDPE) within 35 days when fed with PE powder. Scanning electron microscopy and water contact angle measurements revealed that these strains could adhere to PE films and render them hydrophilic. Fourier-transform infrared spectroscopy analysis showed an increase in the oxygen-carbon ratio of the PE films, facilitating degradation. In addition, genome sequencing was utilized to explore the underlying PE degradation mechanisms, and a laccase-like multicopper oxidase (CueO) was demonstrated to have obvious PE degradation capability for the first time. This enzyme exhibited outstanding pH stability (optimal pH 2.5) and temperature tolerance (55 °C), with activity further enhanced by Cu<sup>2+</sup>/Mn<sup>2+</sup> ions. Comprehensive characterization using SEM, FTIR, and WCA systematically revealed biofilm-mediated surface erosion and polymer chain destabilization mechanisms. Overall, this study established a novel biological resource library for PE degradation by exploring the genetic information of PE-degrading microorganisms and their key enzyme systems, laying a theoretical foundation for elucidating the molecular mechanisms of polyolefin biodepolymerization.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"205 ","pages":"Article 106182"},"PeriodicalIF":4.1,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773226","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}

引用次数: 0

Advancing risk prediction of coal spontaneous combustion: Intelligent gas index models for accurate self-ignition temperature forecasting towards low-carbon energy systems 推进煤炭自燃风险预测：面向低碳能源系统的自燃温度精确预测智能气体指数模型

IF 7.8 2区环境科学与生态学

Process Safety and Environmental Protection Pub Date : 2025-08-05 DOI: 10.1016/j.psep.2025.107676

Hung Vo Thanh , Hemeng Zhang , Yayou Xu , Baofu Wang , Yongjun Wang , Zhenxue Dai

{"title":"Advancing risk prediction of coal spontaneous combustion: Intelligent gas index models for accurate self-ignition temperature forecasting towards low-carbon energy systems","authors":"Hung Vo Thanh , Hemeng Zhang , Yayou Xu , Baofu Wang , Yongjun Wang , Zhenxue Dai","doi":"10.1016/j.psep.2025.107676","DOIUrl":"10.1016/j.psep.2025.107676","url":null,"abstract":"<div><div>Accurate prediction of coal spontaneous combustion (CSC) is critical for preventing fire-related disasters and ensuring safety in coal mining and storage operations. CSC originates from complex oxidation reactions that occur at low temperatures, producing various index gases that exhibit nonlinear relationships with temperature. This study investigates these mechanisms and applies advanced machine learning models to predict coal temperatures from temperature-programmed test data. This research evaluates four machine learning models: Extreme Gradient Boosting (XGBoost), Extra Trees (ET), Random Forest (RF), and Adaptive Gradient Boosting (AdaBoost). Five gas indicators, including O₂, CO, C₂H₄, CO divided by ΔO₂, and the ratio of C₂H₄ to C₂H₆, are used as input features. Among the models tested, XGBoost achieves the best performance with the lowest mean absolute error (MAE) and root mean square error (RMSE), along with the highest coefficient of determination (R²) across both training and testing datasets. Its predictive robustness is further confirmed through validation in additional scenario. To improve interpretability, the study employs SHAP (Shapley Additive Explanations) analysis, which identifies C₂H₄ and the C₂H₄ to C₂H₆ ratio as the most influential features in the prediction process. These insights highlight the model’s practical value for early CSC detection and risk mitigation. The proposed framework provides a reliable and scalable solution for real-time monitoring and early warning of coal self-heating. It enhances safety and operational efficiency in coal management. Furthermore, this approach supports the transition toward more sustainable and low-carbon energy systems by reducing energy losses and environmental damage caused by coal fires.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"202 ","pages":"Article 107676"},"PeriodicalIF":7.8,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773175","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}

引用次数: 0