检索结果-内蒙古大学图书馆

Impact of climatic factors on eutrophication in the World's largest lake

Ecological Indicators 2025年 175卷

作者： Mozafari, Zohra Noori, Roohollah Bateni, Sayed M. Jun, Changhyun Kim, Dongkyun Saravani, Mohammad Javad Naderian, Danial Siadatmousavi, Seyed Mostafa Afzalimehr, Hossein Azizpour, Jafar Sadrinasab, Masoud Hosseinzadeh, Majid Kianmehr, Peiman Abolfathi, Soroush School of Civil Engineering Iran University of Science and Technology Tehran Iraq Graduate Faculty of Environment University of Tehran Tehran Iraq Richmond Hill ON Canada Department of Civil Environmental and Construction Engineering and Water Resources Research Center University of Hawaii at Manoa HonoluluHI United States Department of Civil and Environmental Engineering College of Engineering Korea University Seoul Korea People's Democratic Rep Department of Civil and Environmental Engineering Hongik University Mapo-gu Seoul Korea People's Democratic Rep Tehran Iraq Department of Civil Engineering American University in Dubai Dubai United Arab Emirates School of Engineering University of Warwick Coventry United Kingdom UNESCO-UNISA Africa Chair in Nanoscience and Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge Pretoria392 South Africa

Climatic and anthropogenic factors both contribute to lake eutrophication. However, the influence of climatic factors, particularly in large, deep, and transboundary lakes, remains poorly understood due to technical challenges, data scarcity, and geopolitical constraints. This is especially true for the Caspian Sea, the world's largest lake, where its unique continental climate further complicates efforts to quantify the climate contribution to eutrophication. This study leverages extensive datasets from MODIS-Aqua and the ERA5, spanning 2003 to 2021, to develop a generalized additive model (GAM) aimed at investigating the impact of climatic factors on chlorophyll-a (Chl-a) concentrations in the Caspian Sea. Given the sea's distinct continental climate, complex morphometric characteristics, and significant spatial variability in Chl-a, the basin was divided into 14 subzones to better capture regional responses of Chl-a to climatic changes. The GAM, trained to predict Chl-a, demonstrated acceptable performance (correlation coefficient > 0.5) in 12 of the 14 subzones. Results indicate the predominant influence of photosynthetically active radiation on Chl-a changes in nine subzones, particularly in the southern Caspian Sea. This parameter is critical for regulating light availability for phytoplankton productivity. Sea surface temperature emerged as the second most influential driver of Chl-a levels, likely due to its role in controlling thermal stratification and upwelling, which stimulate phytoplankton growth. Precipitation, by contrast, was found to be the least significant driver of Chl-a levels during the study period. By elucidating the relationships between climatic drivers and Chl-a levels, this study provides a comprehensive understanding of the complex dynamics of eutrophication under changing climate conditions in the Caspian Sea. © 2025 The Author(s)

关键词： Phytoplankton

来源：评论

学校读者我要写书评

暂无评论

Light-driven biohybrid for phosphorus recovery via struvite biomineralization in tetracycline-laden livestock wastewater

引用

water Research 2025年 282卷 123745页

作者： Yang, Shang Hu, Andong Zhang, Jia Yu, Wei Wu, Xiaofeng Huang, Yuefei Zhou, Shungui Li, Bing Wang, Guangqian Water Research Center Tsinghua Shenzhen International Graduate School Tsinghua Guangdong Shenzhen518055 China School of Life Sciences Zhengzhou University Henan Zhengzhou450001 China Department of Material and Chemical Engineering The University of Auckland New Zealand Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and Environment Fujian Agriculture and Forestry University Fujian Fuzhou350002 China School of Water Resources and Electric Power Key Laboratory of Ecological Protection and High-Quality Development in the Upper Yellow River Key Laboratory of Water Ecological Remediation and Protection at Headwater Regions of Big Rivers Ministry of Water Resources Qinghai University Qinghai Xining810016 China State Key Laboratory of Plateau Ecology and Agriculture Qinghai University Qinghai Xining810016 China

Struvite biomineralization drives phosphate mineralization, playing a critical role in sustaining biogeochemical phosphorus cycling and industrial phosphorus recovery. Phosphorus-rich wastewater, however, frequently contains inhibitory tetracycline that suppresses microbial activity, diminishes recovery efficiency, and accumulates in recovered struvite. Semiconductor-mediated microbial photoelectrochemical process generate photogenerated electrons to stimulate microbial metabolism. Concurrently, photogenerated reactive oxygen species can degrade tetracycline. Despite extensive evidence of TC's inhibitory effects on biomineralization, the development of integrated photoelectrochemical-microbial process for simultaneous tetracycline degradation and phosphorus recovery remains unexplored. We develop a microbial photoelectrochemical system integrating microorganisms with nano-semiconductor materials. Light-activated carbon nitride generates electrons boosting microbial metabolism and holes degrading tetracycline. Coupling carbon nitride with S. oneidensis under illumination doubles biomineralization rates in tetracycline-laden wastewater versus conventional struvite biomineralization. The system achieves near-complete tetracycline degradation within 48 hours and full nitrate reduction. Those efforts achieve simultaneous phosphorus recovery and tetracycline removal from wastewater, converting pollutants into agriculturally viable struvite without pH adjustment. The system establishes an energy-efficient platform for coupled nutrient recovery and water purification, while creating a closed-loop framework for resource regeneration from contaminated wastewater. © 2025 Elsevier Ltd

关键词： Wastewater reclamation

来源：评论

学校读者我要写书评

暂无评论

How different spatial resolutions of digital models affects the geospatial distribution evaluation of the Index of Connectivity

引用

Journal of South American Earth Sciences 2025年 163卷

作者： Eberval Marchioro Geraldo André Rosseto Barreto Ialy Gomes Ferreira Adelsom Soares Filho Diogo Costa Buarque Department of Geography (DGEO) Graduate Program in Geography (PPGG) Federal University of Espírito Santo/Brazil (UFES) Coordinator of the Laboratory for Monitoring and Modeling Environmental Systems (Lamosa) Brazil Graduate Program in Management and Regulation of Water Resources (ProfÁgua/UFES) Brazil Graduate Program in Geography at UFES Brazil Graduate Program in Civil Engineering at UFV Brazil Department of Geography Graduate Program in Geography Federal University of Grande Dourados (UFGD) Brazil Department of Environmental Engineering Graduate Program in Environmental Engineering (PPGEA) Professional Master's in Water Resources Management and Regulation (ProfÁgua/UFES) Federal University of Espírito Santo/Brazil (UFES) Brazil

Digital Terrain Models (DTM) and Digital Elevation Models (DEM) are important for obtaining the Index of Connectivity, as they provide valuable information to assess the possibility of sediments reaching the riverbed in watershed basins. This is crucial for proactive management, as it allows the adoption of preventive and mitigating measures. Therefore, this study aims to analyze the effect of the spatial resolution of DEMs with resolutions of 5 m and 2 m, and between the DTM and DEM at 2 m, in determining the Index of Connectivity (IC). Additionally, it was investigated whether it is possible to use only one spatial resolution of digital models to assess the geospatial distribution of IC for all hydrogeomorphological landscapes of the Duas Bocas River watershed, located in the Metropolitan Region of Greater Vitória, in the state of Espírito Santo, Southeast Brazil. For this study, the Borselli Index of Connectivity model (et al., 2008) was used, originally developed for rural areas of Italy and widely applied in different regions worldwide. The data used, including Digital Elevation and Terrain Models and land use and cover information, were obtained from the Integrated Geospatial Base System of the State of Espírito Santo (Brazil), which is publicly *** results indicate that a better geospatial representation of IC occurs when changing the spatial resolution of DEMs from a 5 m pixel to a 2 m pixel and when using the 2 m DTM instead of the 2 m DEM. When analyzing the relationship between IC and the hydrogeomorphological landscapes in the basin, it was observed that, in the absence of models with an even finer pixel resolution, the 2 m DTM is the most suitable option, as it presented IC values consistent within and between landscapes in the Escalated Terraces of Southern Espírito Santo, Coastal Hills and Massifs, and Coastal Plateaus sectors. The exception was the fluvio-lagoon plain, which requires an even finer pixel resolution, necessitating further st

关键词：

来源：评论

学校读者我要写书评

暂无评论

SEPARATION OF INORGANIC SALTS FROM SUPERCRITICAL water BY CROSS-FLOW MICROFILTRATION

引用

SEPARATION SCIENCE AND TECHNOLOGY 1995年第7-9期30卷 1491-1509页

作者： GOEMANS, MGE LI, L GLOYNA, EF [a] Environmental and Water Resources Engineering and Separations Research Program The University of Texas at Austin Austin Texas

A cross-flow microfilter capable of operating at elevated temperatures and pressures was evaluated for its ability to remove inorganic salts from supercritical water (SCW). The separation characteristics of-molten sodium nitrate were investigated. The overall performance of the cross-flow microfilter and the effects of process variables on the separation efficiency were evaluated. Separation efficiencies up to 85% were observed. An empirical model was developed for the prediction of the filtrate salt concentration and the fluidized cake resistance as a function of the salt solubility and salt flux to the filter. Physical principles governing the separation process were defined.

关键词：

来源：评论

学校读者我要写书评

暂无评论

GENERALIZED KINETIC-MODEL FOR WET OXIDATION OF ORGANIC-COMPOUNDS

引用

AICHE JOURNAL 1991年第11期37卷 1687-1697页

作者： LI, LX CHEN, PS GLOYNA, EF Separations Research Program and Environmental and Water Resources Engineering University of Texas Austin TX 78758

A generalized kinetic model for wet oxidation (WO) of organic compounds was developed based on a simplified reaction scheme considering acetic acid as the rate-limiting intermediate. The selectivity of product vs. intermediate formations was quantified by the ratio of the two reaction rate constants. This point selectivity alpha may be used to characterize the "strength" of the feed stream to be treated. This global model was validated using WO kinetic data reported for temperatures ranging from 150-degrees-C to 550-degrees-C and pressures varying from 20 bar to 440 bar. Organic conversions predicted by this model, as compared to other models, more accurately reflect the actual performance of WO processes. The model has practical validity for a variety of organic compounds, wastewaters and sludges in both subcritical and supercritical water oxidation processes.

关键词： Organic Compounds

来源：评论

学校读者我要写书评

暂无评论

Pivotal role of snow depth, local atmospheric conditions, and large-scale climate signals on ice thinning in Finnish lakes

引用

Science of the Total Environment 2025年 966卷 178715页

作者： Naderian, Danial Noori, Roohollah Bateni, Sayed M. Jun, Changhyun Kim, Dongkyun Shahmohammad, Mohsen Alizadeh, Farzaneh Kianmehr, Peiman Woolway, R. Iestyn Graduate Faculty of Environment University of Tehran Tehran*** Iran Department of Civil Environmental and Construction Engineering Water Resources Research Center University of Hawaii at Manoa HonoluluHI96822 United States UNESCO-UNISA Africa Chair in Nanoscience and Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge Pretoria392 South Africa School of Civil Environmental and Architectural Engineering College of Engineering Korea University Seoul02841 Korea Republic of Department of Civil and Environmental Engineering Hongik University Seoul04066 Korea Republic of School of Planning Design & Construction Michigan State University 552 W. Circle Dr East LansingMI48824 United States Department of Civil Engineering American University in Dubai Dubai United Arab Emirates School of Ocean Sciences Bangor University Menai Bridge AngleseyLL59 5AB United Kingdom

Lake ice thickness is a critical indicator of climate change, with profound implications for aquatic ecosystems. Despite its importance, our understanding of changes in lake ice thickness is relatively limited. Additionally, the influence of snow depth on ice thickness at a regional scale is not well understood, primarily due to the lack of long-term, high-resolution in-situ data. In this study, we leveraged in-situ data from 35 stations across 32 deep Finnish lakes, collected from 1995 to 2023, to investigate and simulate changes in maximum ice thickness using traditional statistical tools and artificial intelligent models. Our results indicate a decrease in maximum ice thickness at nearly all (34 out of 35) studied sites, with an average annual decrease of ∼3.4 mm/yr. The rate of decline was slower in lakes situated at higher latitude and at higher elevation. In the southern lakes of Finland, local atmospheric conditions were more effective in explaining the variance in ice thickness. However, at higher latitudes, the influence of these local factors decreased. Winter air temperature and snow depth were identified as the main drivers of maximum ice thickness. Snow depth was positively correlated with ice thickness (R = 0.63), largely due to its insulating effect, which supports faster ice growth in deeper lakes. Among the large-scale climate signals tested, the North Atlantic Oscillation and Scandinavia Pattern, as well as global CO2 concentrations, were key drivers of the developed ice thickness models. Our findings suggest that readily accessible large-scale climate signals can be used to inform modelling efforts of lake ice thickness. © 2025 Elsevier B.V.

关键词： Ice

来源：评论

学校读者我要写书评

暂无评论

Fluvial geomorphology of the Middle Reach of the Huai River

引用

International Journal of Sediment Research 2014年第1期29卷 24-33页

作者： Bang-yi YU Peng WU Jue-yi SUI Xing-ju YANG Jin NI Research Institute of Water Resources Engineering of Anhui Province Environmental Engineering Program University of Northern British Columbia

The Middle Reach of the Huai River（MRHR） flows northeast into the Hongzehu *** entering the Hongzehu Lake,the Huai River has a braided channel which is shallow and wide,and the riverbed has a negative *** on the characteristics of the MRHR,this river reach can be divided into the following sections:a quasi-straight（or mildly curved） section,a bend section,and a braided *** majority of the MRHR is *** this paper,several parameters are used to assess the geomorphology of the *** analyses are performed to establish a relationship between the span length "L" and channel width "B" for different channel *** relationship between the meandering length "S" and bankfull channel width "B" is also *** indicate that the bankfull channel width "B",the bankfull cross sectional area "A" and the average flow depth "H" are mainly dependent on the dominant discharge in the channel.A relationship is derived that describes the dependency of the curvature radius "R" on the dominant discharge "Q",water surface slope "J" and the turning angle;.

关键词： Braided channel Dominant discharge Huai River Channel pattern

来源：评论

学校读者我要写书评

暂无评论

SUPERCRITICAL water OXIDATION OF ACETIC-ACID BY POTASSIUM-PERMANGANATE

引用

JOURNAL OF HAZARDOUS MATERIALS 1993年第1期33卷 51-62页

作者： CHANG, KC LI, LX GLOYNA, EF Environmental and Water Resources Engineering Program Chemical Engineering Department The University of Texas at Austin Austin TX 78712 USA

Supercritical water oxidation (SCWO) of acetic acid by potassium permanganate (KMnO4) was studied. The experiments were performed in a batch reactor at temperatures and pressures, respectively, ranging from 400-degrees-C to 460-degrees-C and from 275 bar to 350 bar. For comparison purposes, other oxidants, such as oxygen, hydrogen peroxide, Cu-H2O2, Fe-H2O2 and MnSO4-H2O2, were studied. Subcritical tests with potassium permanganate were also conducted at temperatures of 250-degrees-C, 300-degrees-C and 350-degrees-C. The order of acetic acid destruction effectiveness was found to be KMnO4 > Cu-H2O2 > Fe-H2O2 > MnSO4-H2O2 > H2O2 > O2 at a temperature of 400-degrees-C, density of 0.3 g/ml and reaction time of less than 10 min. The acetic acid destruction efficiency by potassium permanganate was 77% at a temperature of 400-degrees-C, density of 0.3 g/ml and a reaction time of 2.5 min. Under similar conditions, only 40% of acetic acid was destroyed at 250-degrees-C. Potassium permanganate was demonstrated to be an effective oxidant for SCWO of acetic acid.

关键词： Acetic acid

来源：评论

学校读者我要写书评

暂无评论

Polyethylene microplastics hamper aged biochar’s potential in mitigating greenhouse gas emissions

引用

Carbon Research 2025年第1期4卷 1-14页

作者： Chen, Yalan Wang, Zhibo Zhang, Anqi Li, Yang Sun, Ke Jiang, Chenrun Gunina, Anna Aloufi, Abeer S. Liang, Xinru Han, Zichen Xiao, Yue Zhang, Yunqian Du, Zhangliu Zhu, Shishu Kuzyakov, Yakov State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China College of Life Sciences Beijing Normal University Beijing100875 China Department of Urban Engineering Graduate School of Engineering The University of Tokyo Tokyo113-8656 Japan Agrarian and Technological Institute RUDN University Miklukho-Maklaya st. 6 Moscow117198 Russia Department of Biology College of Science Princess Nourah Bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia Beijing Key Laboratory of Biodiversity and Organic Farming College of Resources and Environmental Sciences China Agricultural University Beijing100193 China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education School of Environment and Energy South China University of Technology Guangzhou510006 China Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil Science University of Goettingen Göttingen37077 Germany Moscow117198 Russia

While biochar effectively reduces greenhouse gas emissions, the coincident microplastics will alter these benefits. To assess the long-term efficacy of biochar application in reducing emissions amidst microplastic interference, we investigated the interactive effects of polyethylene microplastics (1%–5% wt) and decadal biochar addition (aged biochar) on C and N stability in a Fluvic Cambisol. Aged biochar and polyethylene individually reduced CO2 emissions by 49% and 18%, respectively, over 91-day incubation. This was due to decreased soil aggregation, dissolved organic matter (DOM) content, and increased DOM aromaticity, which reduced microbial biomass and chitinase activity associated with soil organic matter (SOM) decomposition. This ultimately led to increased accumulation of microbial necromass carbon (MNC) to soil stable carbon pool. Interestingly, the coexistence of polyethylene diminished the efficacy of biochar in mitigating CO2 emissions (+ 44 ~ 82%) and stabilizing MNC (-18 ~ 23%). This was because the interaction between polyethylene and biochar facilitated macroaggregate formation and DOM accumulation and decreased DOM aromaticity, which increased microbial biomass and chitinase activity for SOM decomposition. Similar to soil C dynamics, aged biochar largely reduced N2O emissions by 54%, due to decreased nirK but increased nifH genes. Polyethylene increased N2O emissions by 5% and 25% in biochar-free and aged biochar soil, respectively, likely through upregulation of nirS and nirK but downregulating nifH gene expression. Thus, polyethylene microplastics may undermine the benefits of biochar in mitigating climate change, highlighting the necessity to recognize microplastics as a global change factor and to incorporate their role in elemental cycling alongside their global transport. Graphic Abstract: (Figure presented.) © The Author(s) 2025.

关键词： Greenhouse gas emissions

来源：评论

学校读者我要写书评

暂无评论

Effectiveness of Predicting Event-Level Interception Losses Across Diverse Vegetated Sites Using Statistical Models

引用

Ecohydrology 2025年第3期18卷

作者： Abigail G. Sandquist Stephen P. Good Gabriel Barinas Scott T. Allen Graduate Program of Hydrologic Sciences University of Nevada Reno Reno Nevada USA Department of Natural Resources and Environmental Science University of Nevada Reno Reno Nevada USA Water Resources Graduate Program Oregon State University Corvallis Oregon USA Biological & Ecological Engineering Department Oregon State University Corvallis Oregon USA

Understanding evaporation from wet canopies across ecosystems is challenged by its spatiotemporal variability and associated observational challenges. Precipitation and throughfall were measured at 22 sites of the National Ecological Observatory Network using consistent methodologies across diverse climates and ecosystems, providing a novel opportunity to examine the performance of statistical models in predicting interception loss from meteorological and canopy-structure data. We used those data to quantify event-level interception losses and found wide variation; median interception loss of small storms (< 10 mm) was 37.7% (39% inter-quartile range), and of large storms (> 50 mm) was 19.8% (20% interquartile range). We found storm gross-precipitation depth was the most important variable for predicting the amount of interception loss (predicting ~70% of the variation), followed by mean canopy height and air temperature. Storm gross-precipitation depth was also an important predictor of interception loss as a percent of storm depth, but much less variation was explained ( R 2 = 0.11, RMSE = 24%). Prediction of percent interception loss improved ( R 2 = 0.32 and RMSE = 19%) by including additional meteorological and vegetation structure characteristics in a random forest model. In addition to demonstrating the greater importance of storm traits over vegetation traits in predicting event interception losses, this analysis showed that relationships between storm traits and interception losses differed among sites; these inconsistent relationships across sites limited the ability for any statistical model to perform well in predicting event-level interception losses across sites, which may justify the use of alternative approaches (e.g. process-based models).

关键词： rainfall partitioning remote sensing throughfall vegetation structure

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：