检索结果-内蒙古大学图书馆

Responses of Microcystis aeruginosa to polystyrene microplastics: Growth dynamics and implications for water treatment

引用

Journal of Hazardous Materials 2025年 494卷 138650页

作者： Liu, Decai Zhang, Zhiyong Xu, Lei Fu, Ming-Lai Sun, Wenjie Yuan, Baoling Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control College of Civil Engineering Huaqiao University Fujian Xiamen361021 China Key Laboratory of Songliao Aquatic Environment Ministry of Education Jilin Jianzhu University Changchun130118 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Department of Atmospheric and Hydrologic Science St. Cloud State University 720 4th Avenue South St. Cloud MN56301 United States

The understanding of microplastics (MPs) has advanced significantly with their accumulation in aquatic environments, but their potential impact on cyanobacterial blooms remains inadequately understood. Herein, the dynamic fluctuating effects of polystyrene (PS) on Microcystis aeruginosa were investigated throughout its growth cycle, as well as the action of algal organic matter in the disinfection by-products formation. The maximum inhibition of algal cell growth and phycobiliprotein content by PS during the adaptation phase reached 56.3 % and 76.3 %, respectively. With the extension of exposure time, the inhibitory effect gradually transitions into promotive effect. PS exposure increased the content of extracellular organic matter and enhanced the THMs formation during chlorination, with trihalomethanes concentrations of 62.8 and 101.9 μg/L in the control and PS treatment groups, respectively. Moreover, the reactive oxygen species levels in PS-exposed algal cells were only 71.5 % of those in the control group, and total antioxidant capacity levels, superoxide dismutase and catalase activities were also lower. However, the microcystin content exposed PS was increased to 1.2 times that of the control group. The presence of PS in aquatic environments increases the levels of algal organic matter and microcystin, potentially threatening water quality. This study provides new insights into the combined effects of microplastics on freshwater algae and valuable data on potential risk associated with MPs. © 2025 Elsevier B.V.

关键词： Cell growth

来源：评论

学校读者我要写书评

暂无评论

Occurrence of antibiotic resistance genes and bacterial pathogens in water and sediment in urban recreational water

引用

Journal of environmental Sciences 2019年第3期31卷 65-74页

作者： Peiyan Dong Qijia Cui Tingting Fang Yong Huang Hui Wang State Key Joint Laboratory on Environment Simulation and Pollution Control School of Environment Tsinghua University

The emergence and prevalence of antibiotic resistance genes(ARGs) and pathogens in the environment are serious global health concern. However, information about the occurrence of ARGs and pathogens in recreational water is still limited. Accordingly, we investigated the occurrence of six ARGs and human pathogens in three recreational lakes, and the correlations between ARGs and one mobile genetic element(intI1) were analyzed. The quantitative PCR results showed that the concentration of ARGs ranged from 4.58 × 10~0 to 5.0 × 10~5 copies/mL in water and from 5.78 × 10~3 to 5.89 × 10~8 copies/g dry weight(dw)in sediment. Sul1 exhibited the highest level among the five quantifiable ARGs. The concentrations of sul1, bla_(-TEM), and tetX exhibited significant positive correlations with intI1(p < 0.05), indicating that intI1 may be involved in their proliferation. The detection frequencies of ARGs ranged from 75%–10~0%, indicating the prevalence of these risks in this region. The concentration of Escherichia coli, Aeromonas spp., Mycobacterium avium,Pseudomonas aeruginosa, and Salmonella enterica ranged from 10~3 to 10~5 copies/10~0 mL in water and 10~4–10~6 copies/g dw in sediment. In total, 25% of the samples harbored all pathogen genes, indicating the prevalence of these pathogens in recreational ***, the next-generation sequencing results showed that 68 genera of pathogens were present, among which Aeromonas, Mycobacterium, and Pseudomonas were the dominant ones in this region, posing a considerable potential health risk to public health. Overall, the widespread distribution of ARGs and pathogens underscores the need to better monitor and mitigate their propagation in recreational lakes and the associated risks to human health.

关键词： Recreational water ARGs Class 1 integron Pathogen diversity and concentration

来源：评论

学校读者我要写书评

暂无评论

Potential Assessment of Photovoltaic Power Generation in China Based on High Temporal Resolution Scale

Potential Assessment of Photovoltaic Power Generation in Chi...

引用

IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia)

作者： Xi Huang Jiaxing Wang Jie Shi Yan Li Yuming Wang School of Mathematics Southeast University Nanjing China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing China School of Physics and Technology University of Jinan Jinan China Science and Engineering Tongji University College of Environmental Shanghai China

ISBN: (数字)9798350352290

ISBN: (纸本)9798350352306

Photovoltaic (PV) power generation in China has experienced promising growth and will further become a significant sector of the power system in the near future. To further utilize the variable uncertain PV resources, the PV power generation resource assessment focusing on a high temporal resolution would greatly assist China in achieving its dramatic solar development goals. In this paper, the installed PV potential of every province in China is measured by the Energy Research Institute of the National Development and Reform Commission based on the radiation intensity and temperature data with a time step of 15 minutes. Thus the real-time PV power output of 31 provinces, along with the assessment results show that China's PV power potential is 4567.0 TWh/year, which is approximately equivalent to 60% of the total social electricity consumption in 2019; as for the spatial distribution, Inner Mongolia, Xinjiang, and Tibet possess the largest PV potential in China, with power generation potential of 1281.6 TWh/year, 576.0 TWh/year, and 394.3 TWh/year, respectively; there are large quarterly and monthly varieties in the availability of PV power generation in each province. There are large monthly and quarterly differences in the temporal availability of PV power generation in each province, with the difference between the highest availability month and the lowest availability month in every province generally being larger than 150%, and the PV output also fluctuates considerably during the day in different seasons in each province.

关键词： Temperature measurement Photovoltaic systems Electric potential Graphical models Uncertainty Electricity Real-time systems Power systems Power generation Distribution functions

来源：评论

学校读者我要写书评

暂无评论

Improvement of Low-Temperature Nh3-Scr Activity Over Cevo4 Modified by Sm

SSRN

引用

SSRN 2024年

作者： Li, Yingjie Du, Jinpeng Lin, Chunxi Lin, Jinhan Liu, Jianqi Cai, Jieying Liu, Congwei Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Ningbo315800 China University of Chinese Academy of Sciences Beijing100049 China College of Engineering Eastern Institute for Advanced Study Ningbo315201 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China

In this study, CeSmVO4 catalysts were prepared using the coprecipitation method. The Ce0.8Sm0.2V catalyst exhibited excellent NH3-SCR activity in a wide temperature window range of 175 oC to 375 oC, even under a high GHSV of 200,000 h-1. Analysis using XRD, Raman, and BET techniques revealed that doping Sm into CeVO4 enlarged the surface area and reduced the crystallite size of the catalyst. The H2-TPR and XPS results indicated that the incorporation of Sm improved the redox ability and enhanced the interaction among Ce, Sm, and V. NH3-TPD results demonstrated that the introduction of Sm into CeVO4 resulted in an increase in the number of acid sites. All these factors contributed significantly to the enhancement of low-temperature NH3-SCR reaction activity. Moreover, the addition of Sm could increase the number of Lewis acid sites, enhance the adsorption of NOx species, and promote the formation of -NH2 species and NH4NO3 species, which play a vital role in enhancing the SCR activity. The NH3-SCR reaction on the Ce0.8Sm0.2V catalyst followed both Langmuir-Hinshelwood and Eley-Rideal mechanisms. © 2024, The Authors. All rights reserved.

关键词： Temperature

来源：评论

学校读者我要写书评

暂无评论

Copper-Ceria Catalysts with Improved Water and Sulfur Resistance: Computational Design and Structural Optimization

SSRN

引用

SSRN 2023年

作者： Sen, Shao You, Xiaoqing Li, Guoliang Wang, Shuxiao Key Laboratory for Thermal Science and Power Engineering Ministry of Education Tsinghua University Beijing100084 China Center for Combustion Energy Tsinghua University Beijing100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China Tsinghua University China

Copper species dispersed on ceria have emerged as promising catalysts for various energy and environmental applications. However, the presence of water vapor in the actual application environment can significantly hinder the catalyst activity. Flame-synthesized catalysts have been found to possess good water resistance as well as strong mercury oxidation and sulfur resistance. In this study, two types of copper-cerium binary structures were compared: Cu/CeO2 and CuO/CeO2, which represent highly dispersed copper on the CeO2 lattice surface (the main structure of the flame-synthesized catalyst) and CuO clusters supporting on the CeO2 lattice (the main structure of catalyst synthesized by impregnation methods), respectively. The adsorption energies of SO2, H2O, and Hg0 over these structures were studied by density functional theory calculations. The results revealed that Cu-O2/CeO2 (Cu/CeO2 with absorbed O2) had the highest Hg0 adsorption energy (-81.4 kJ/mol), followed by CuO/CeO2 (-13.1 kJ/mol) and CeO2 (-4.4 kJ/mol). Both Cu-O2/CeO2 and CuO/CeO2 showed improved sulfur resistance compared to CeO2, because SO2 was preferentially absorbed on copper sites, protecting the active sites on the CeO2 surface. H2O was absorbed and hydrolyzed into hydroxyl groups on the surfaces of all structures. The hydrolysis process consumed active oxygen on the CeO2 surface for CeO2 and CuO/CeO2, but consumed oxygen absorbed from the surrounding air for Cu-O2/CeO, leading to its best water resistance among the three. This finding opens up possibilities for the development of highly efficient and water-resistant catalysts. © 2023, The Authors. All rights reserved.

关键词： Density functional theory

来源：评论

学校读者我要写书评

暂无评论

Oxygen Vacancy Engineering Through Equivalent and Aliovalent Doping on Lacoo3

SSRN

引用

SSRN 2024年

作者： Cheng, Hongjun Jin, Yanyu Zhou, Bin Li, Dan Wang, Yu Mo, Shengpeng Wang Liu, Xiaoqing Si, Wenzhe Li, Junhua School of Environment and Safety Engineering North University of China Taiyuan030051 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Environmental Science and Engineering Yancheng Institute of Technology Yancheng224051 China Guilin University of Technology China

Oxygen vacancies of perovskite oxides are crucial for improving catalytic oxidation activities. However, the effect of oxygen vacancy concentration on catalytic performance and mechanism have not been revealed unambiguously. Herein, cobalt-based perovskites catalysts La0.8X0.2CoO3 (LXCO) with different oxygen vacancy (VO) concentrations were obtained by A-site equivalent and aliovalent doping. Moderate oxygen vacancy concentration was conductive to the CO and toluene catalytic activities, and too little or too much oxygen vacancies could reduce the catalytic properties. Based on the experimental of XPS, NAP-XPS, and O2-TPD, the La0.8Ca0.2CoO3 (LCaCO) catalyst with moderate oxygen vacancy concentration promoted the adsorption and activation of oxygen, forming more reactive oxygen species, ulteriorly improving the oxygen mobility, compared to La0.8Nd0.2CoO3 (LNdCO) catalyst with high oxygen vacancy concentration. In situ DRIFTS studies indicated that surface reactive oxygen species could be continuously replenished for LCaCO catalyst. In the reaction process, methyl C-H breaked and combined with active oxygen species to form OH species, accelerated the formation of intermediates such as benzyl alcohol, promoting toluene oxidation. This study could provide a relationship between the concentration of oxygen vacancy and the catalytic performance of perovskite oxide catalysts, thereby guiding the design of catalysts with superior catalytic activity. © 2024, The Authors. All rights reserved.

关键词： Lanthanum compounds

来源：评论

学校读者我要写书评

暂无评论

N-Nitrosamines in Karst Groundwaters in Southwestern China: Risks and Implications for Drinking Water Safety

SSRN

引用

SSRN 2025年

作者： Gu, Xiongwei Xu, Liwei Huang, Xin Chen, Yingjie Shan, Yuanyu Yan, Xiaoyu Liu, Zhaojue Zeng, Hong-Hu Chen, Wenwen Huang, Huanfang Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of Technology Guilin541006 China Engineering Research Center of Watershed Protection and Green Development University of Guangxi Guilin University of Technology Guilin541006 China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Sciences MEE Guangzhou510535 China SCNU Environmental Research Institute Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment South China Normal University Guangzhou510006 China

Groundwater is a vital drinking water source for populations in remote karst regions. However, the highly developed karst tube systems facilitate the infiltration of surface wastewater containing N-nitrosamines, raising concerns about groundwater safety. To assess the safety of groundwater and identify which types are safer for consumption, this study investigated N-nitrosamines in various groundwater types, including ground river, karst cavern, well, and mountain spring waters, in Guangxi, a typical karst region in southwestern China. The total concentrations of eight N-nitrosamines in groundwater ranged from 5.1 to 70.3 ng/L, with N-nitrosodiethylamine (NDEA), N-nitrosodimethylamine (NDMA), and N-nitrosopyrrolidine (NPYR) being the dominant species. Ground river water exhibited significantly higher N-nitrosamine concentrations than karst cavern, well, and mountain spring waters. Significant correlations between N-nitrosamines and dissolved inorganic nitrogen suggested their co-emissions from domestic wastewater and the secondary formation potential of N-nitrosamines in groundwater. Redundancy analysis further identified domestic and swine wastewater as the primary sources. Ground river and mountain spring waters posed the highest risks among the four groundwater types, with 30% and 20% of sites, respectively, exceeding acceptable cancer risk thresholds. These findings underscore the importance of thorough water treatment before groundwater is used for drinking. Strict livestock farming and domestic wastewater discharge regulations are essential to mitigate contamination risks, particularly in karst areas. © 2025, The Authors. All rights reserved.

关键词： Nitrosamines

来源：评论

学校读者我要写书评

暂无评论

Enhanced activation of peroxydisulfate by strontium modified BiFeO3 perovskite for ciprofloxacin degradation

引用

Journal of environmental Sciences 2021年第1期33卷 249-259页

作者： Caicai Wang Shengwang Gao Jianchao Zhu Xunfeng Xia Mingxin Wang Yanna Xiong State Key Laboratory of Enuironmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing 100012China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China Solid Waste and Chemicals Management Center Ministry of Ecology and EnvironmentBeijing 100029China

A series of Sr-doped BiFeO3 perovskites(Bi1-xSrxFeO3,BSFO)fabricated via sol-gel method was applied as peroxydisulfate(PDS)activator for ciprofloxacin(CIP)*** technologies were used to characterize the morphology and physicochemical features of prepared BSFO samples and the results indicated that Sr was successfully inserted into the perovskites *** catalytic performance of BiFeO3 was significantly boosted by strontium ***,Bi0.9Sr0.1FeO3(0.1 BSFO)exhibited the highest catalytic performance for PDS activation to remove CIP,where 95%of CIP(10 mg/L)could be degraded with the addition of 1 g/L 0.1 BSFO and 1 mmol/L PDS within 60 ***,0.1 BSFO displayed high reusability and stability with lower metal *** acidic condition was preferred to neutral and alkaline conditions in 0.1 BSFO/PDS *** boosted catalytic performance can be interpreted as the lower oxidation state of Fe and the existence of affluent oxygen vacancies generated by Sr doping,that induced the formation of singlet oxygen(^1O_(2))which was confirmed as the dominant reactive species by radical scavenging studies and electron spin resonance(ESR)*** catalytic oxidation mechanism related to major ^1O_(2) and minor free radicals was *** study opens a new avenue to develop effective A-site modified perovskite and expands their application for PDS activation in wastewater remediation.

关键词： Perovskite Peroxydisulfate Heterogeneous catalysis Singlet oxygen Ciprofloxacin

来源：评论

学校读者我要写书评

暂无评论

Efficient Air Disinfection Achieved by Nanowire Modified Copper Mesh Electrodes

SSRN

引用

SSRN 2023年

作者： Jin, Li Chen, Menghao Chen, Zhuo Li, Mengkai Yao, Maosheng Lu, Yun State Key Joint Laboratory of Environment Simulation and Pollution Control State Environment Protection Key Laboratory of Microorganism Application and Rick Control School of Environment Tsinghua University Beijing100084 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100084 China Bioaerosol Laboratory School of Environmental Science and Engineering Peking University Beijing100084 China

The control of airborne pathogens is of great significance. Inactivation of microorganisms in water by nanowire electroporation has been well studied in recent years. But the effectiveness of nanowires modified electrodes for air disinfection is still unknown. In this study, a disinfection method for quick inactivation of bacteria in air is reported. The copper meshes were modified with Cu(OH)2 nanowires by electrochemical method. A flow-through device with nanowires modified electrodes inside was designed to generate, mix and disinfect bioaerosols. 60% ~ 85% inactivation efficiency for bacteria was achieved with a short air retention time of 0.3 s in high humidity. Endospores are equally sensitive to electric disinfection as the vegetable cells. The inactivation efficiency in moderate humidity could be significantly improved by coating with a high conductive material, PEDOT:PSS. The main inactivation mechanism in air was demonstrated as electroporation by detecting the membrane integrity. This novel disinfection method may be applied for the disinfection of air-transmitted pathogens in the future. © 2023, The Authors. All rights reserved.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

Evaluation of Polyhydroxyalkylate Recovery from Food Waste by Sequencing Batch Biofilm Reactor with High Mixed Microbial Biomass

SSRN

引用

SSRN 2023年

作者： Yu, Peng Tu, Weiming Wu, Menghan Zhang, Zuotao Liu, Xinning Wang, Hui State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Department of Engineering Science University of Oxford OxfordOX1 3PJ United Kingdom

This work presents the enrichment sequencing batch biofilm reactor (SBBR) and conventional enrichment reactor (SBR) were established, and its enrichment and extended cultivation capacity of PHA-accumulation bacteria were investigated. After the 10th day of an extended cultivation period, the active biomass concentrations in SBR and SBBR were 5.16 and 13.92 g/L, respectively, indicating that the SBBR could significantly improve the biomass yield of mixed microbial culture. The maximum PHA concentration of SBR and SBBR in the PHA accumulation test reached 6.60 and 12.70 g/L, respectively, after 80 days of enrichment, indicating that the SBBR could more effectively improve the PHA accumulation capacity than the SBR. Meganema, Thauera and Paracoccus were the dominant PHA-accumulating bacteria in the SBR and SBBR. Additionally, the volumetric productivity of the SBBR was 3.22 g COD/L/d, which was twice that of the SBR. Overall, this study provides new strategies and insights for improving PHA production © 2023, The Authors. All rights reserved.

关键词： Bacteria

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：