检索结果-内蒙古大学图书馆

Developmental toxicity in Daphnia magna induced by environmentally relevant concentrations of carbon black: From the perspective of metabolomics and symbiotic bacteria composition

学校读者我要写书评

暂无评论

Chemosphere 2023年第1期340卷 139889页

作者： Ma, Yunfeng Guo, Ruixin Zheng, Zixuan Min, Peng Ji, Rong Chen, Jianqiu Liu, Yanhua Pharmaceutical Environmental Engineering Laboratory School of Engineering China Pharmaceutical University Jiangsu Nanjing210009 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

The level of carbon black (CB) pollution in the environment is rapidly increasing, owing to the increase in natural and industrial emissions. The water environment has become an important sink for CB. However, studies on CB mainly focused on its impact on air pollution and phytoremediation applications, and the toxicity mechanism of CB in aquatic organisms is relatively limited. Thus, Daphnia magna was used as a model organism to explore the developmental toxicity of environmentally relevant concentrations of CB under a full life-cycle exposure. The toxicity mechanism of CB in aquatic organisms was investigated based on metabolomic and symbiotic microbial analyses. It was found that compared with the control group, the body length of exposed D. magna decreased, while the mortality and intestinal inflammation increased with increasing concentration of CB. The normal reproductive regularity of D. magna was disturbed, and the deformity and body length of the offspring increased and decreased, respectively, after CB exposure. Metabolomic analysis showed that the urea cycle metabolic pathway of exposed D. magna was increased significantly, suggesting a perturbation of N metabolism. In addition, two eicosanoids were increased, suggesting possible inflammation in D. magna. The levels of seven phospholipid metabolites decreased that might be responsible for offspring malformations. Microbiological analysis showed that the composition of the symbiotic microbial community of D. magna was disturbed, including microorganisms involved in carbon cycling, nitrogen cycling, and biodegradation of pollutants, as well as pathogenic microorganisms. Overall, this study found that the inflammatory related metabolites and symbiotic bacterial, as well as reproductive related metabolites, were disrupted after D. magna exposed to different concentrations of CB, which revealed a possible developmental toxicity mechanism of CB in D. magna. These findings provide a scientific basis for analyzin

关键词： Metabolism

Adverse Molecular Toxicity Induced by the Antibacterial Agent Triclosan on Freshwater Microalgae Euglena Gracilis: Perspective from the Transcriptomic and Risk Assessment

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Lu, Ting Zhang, Tong Yang, Weishu Yang, Bin Cao, Jing Li, Mei State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Triclosan (TCS), a commonly used antibacterial preservative, has been demonstrated to have high toxicological potential and adversely affect the water bodies. Since algae are one of the most significant primary producers on the planet, understanding the toxicological processes of TCS is critical for determining its risk in aquatic ecosystems and managing the water environment. The physiological and transcriptome changes of Euglena gracilis were studied after 7 days of TCS treatment. A distinct inhibition ratio for the photosynthetic pigment content in E. gracilis was observed from 2.64% to 37.42% at 0.3–1.2 mg/L, with TCS inhibiting photosynthesis and growth of the algae by up to 38.62%. Superoxide dismutase and glutathione reductase significantly changed after exposure to TCS compared to the control, indicating that the cellular antioxidant defense responses were induced. Interestingly, a toxic dose-response relationship was observed, in which the growth toxic effect increased with increasing TCS concentrations from 0.6–1.2 mg/L. Based on transcriptomics, the enriched differentially expressed genes were main biological processes, involved in metabolism pathways and microbial metabolism in diverse environments. These findings establish the groundwork for future research into the molecular toxicity to microalgae induced by aquatic pollutants, as well as indicating that adequate water environment management is critical and providing fundamental data and recommendations for TCS ecological risk assessment. © 2022, The Authors. All rights reserved.

关键词： Algae

In Situ Fabrication of Highly Dispersed Co-Fe-Doped-Δ-Mno2 Catalyst by a Facile Redox-Driving Mofs-Derived Method for Low-Temperature Oxidation of Toluene

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Huang, Qianlin Zhao, Puzhen Wang, Weiwei Lv, Lu Zhang, Weiming Pan, Bingcai State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Herein, a facile redox-driving MOFs-derived method was successfully developed to fabricate highly dispersed Co-Fe-doped-δ-MnO2 catalysts (Co-Fe-δ-MnO2) for low-temperature oxidation of toluene. The as-obtained Co-Fe-δ-MnO2-20% catalyst exhibited high catalytic activity (225℃) and robust durability in the presence of 5vol.% water vapor. This excellent catalytic performance was primarily ascribed to its unique MOFs-like nanostructure, rich oxygen vacancies, weaker Mn-O bond strength, and good reducibility at low temperatures, which originated from successfully inheriting the framework structures of MOFs and the highly ordered properties of Co and Fe metal clusters in MOFs to realize homogenous co-doping. Furthermore, in-situ DRIFTS spectra results confirmed both adsorbed oxygen (Oads) and lattice oxygen (Olatt) could simultaneously participate in the toluene degradation, and revealed that more Oads and high-mobility Olatt induced by this method contribute to accumulating and mineralizing key intermediate, and thus promoting the toluene degradation. © 2022, The Authors. All rights reserved.

关键词： Volatile organic compounds

Recent progress of radionuclides separation by porous materials

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long Yu Long Chen Cheng Chen Li Wang Fenglei Liu Yun Liao Peng Zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang Lijian Ma Feng Luo Yunhai Liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China School of Life Science Shaoxing UniversityShaoxing 312000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China College of Chemistry Sichuan UniversityChengdu 610064China School of Chemistry and Materials Science East China University of TechnologyNanchang 330013China School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China State Key Laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental SafetySichuan Civil-military Integration InstituteSchool of National Defence&Nuclear Science and TechnologySouthwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Marine Resource Utilization in South China Sea Collaborative Innovation Center of Marine Science and TechnologyHainan UniversityHaikou 570228China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China Department of Chemistry University of North TexasDentonTX 76201USA

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism

Waste Biomass-Derived Biochar in Adsorption-Photocatalytic Conversion of Co2 for Sustainable Energy and environment: Evaluation, Mechanism, and Life Cycle Assessment

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Wei, Xiaoqian Zhang, Xueyang Jin, Li Yang, Xianli Zou, Weixin Gao, Bin Dong, Lin State Key Laboratory of Pollution Control and Resource Reuse School of Environment School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China Department of Civil and Environmental Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse School of Environmental Engineering Xuzhou University of Technology Xuzhou221018 China School of Chemistry Xi'an Jiaotong University Xi’an710049 China

Biochar is an environmentally friendly material with great potential for carbon capture and storage. As the first of its kind, waste biomass-derived biochar was utilized to convert CO2 into fuel in solar. Herein, among four representatives herbaceous, woody, sludge, and manure wastes, the pine sawdust-derived biochar produced the highest CO assisted by higher CO2 adsorption, more than 10 times higher than that of graphene and activated carbon. The function groups of carbonyl and carboxyl on biochar controlled the CO2 capture and solar conversion by decreasing adsorption and activation energies of CO2 molecules. The biochar performed even better for 15% CO2/N2 atmosphere, a typical CO2 concentration in the flue gas, demonstrating its promising potential in waste gas resource utilization. The life-cycle assessment indicates that feedstock with more cellulose and lignin provide better environmental and economic benefits. The work highlights a sustainability pathway for waste biomass-derived biochar in CO2-to-fuel under ambient conditions. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

Can Raising environmental Tax Reduce pollution? Firm-Level Evidence from China

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Zhang, Yue Xia, Fan Zhang, Bing State Key Laboratory of Pollution Control & Resource Reuse School of Environment Nanjing University Nanjing210023 China

Using China’s environmental tax reform in 2018 as a quasi-natural experiment, this paper identifies the effect of raising tax rates on reducing pollution based on micro-level data of over 19 thousand firms nationwide. We estimate that for every unit of tax rate increase, the discharge concentrations of water pollutants, Chemical Oxygen Demand (COD) and Ammonia Nitrogen (NH 3 -N), have significantly decreased by 1.37% and 1.51%, and the emissions have decreased by 8.79% and 2.81%. Firms with a high emission intensity reduce their emissions more than firms with a low emission intensity. We also find that state-owned enterprises, relative to private firms, are less responsive to the tax increase in terms of emission behaviors. Our findings provide evidence that the raised environmental tax has contributed to significant reductions in firm emissions in China, which implies that previous tax rates are below the marginal abatement cost on average. © 2022, The Authors. All rights reserved.

关键词： Water pollution

Literature review: substance and infectious disease surveillance from wastewater-based epidemiology

学校读者我要写书评

暂无评论

Literature review: substance and infectious disease surveill...

第四届环境资源与能源工程国际学术会议

作者： Liulin Xi Ce Wang Tao Li School of Energy and Environment Southeast University State Key Laboratory of Environmental Medicine Engineering Ministry of Education Southeast University State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Taihu Basin Monitoring Center of Hydrology and Water Resources

As the scale of illicit drug abuse and the expansion of pandemic diseases increase, traditional epidemiological surveillance methods are unable to meet the demand of massive real-time observations. The promising approach of wastewater-based epidemiology(WBE) as an effective supplement to traditional surveillance methods relates domestic wastewater to the information of the population within a determined sewer collection area, as its advantages of non-privacy, low-cost and high-efficiency. Resorting to detection and analysis of wastewater samples, the consumption and dispersion of an epidemic substance in a community can be inverse-calculated in an easy way. This review introduces the origin and development of WBE to emerge the great potential of WBE in applications, and recommends basic procedures and calculation *** we focus on its role in monitoring the consumption of some substances(e.g., tobacco, alcohol, sedative narcotic drugs, illicit psychotropic drugs, and synthetic chemicals) and its forewarning signal in epidemic,and finally provides insight into challenges and prospectives.

关键词： Literature review substance and infectious disease surveillance from wastewater-based epidemiology

Scrap Iron Filings assisted nitrate and phosphate removal in low C/N waters using mixed microbial culture

学校读者我要写书评

暂无评论

Frontiers of environmental Science & Engineering 2021年第4期15卷 215-228页

作者： Sanjena Narayanasamydamodaran Jian’e Zuo Haiteng Ren Nawnit Kumar State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China State Key Laboratory of Hydroscience and Hydraulic Engineering Tsinghua UniversityBeijing100084China

This study focuses on identifying the factors under which mixed microbial seeds assist bio-chemical denitrification when Scrap Iron Filings(SIF)are used as electron donors and adsorbents in low C/N ratio *** studies were conducted in abiotic and biotic reactors containing fresh and aged SIF under different dissolved oxygen concentrations with NO_(3)^(-)−N and/or PO_(4)^(3−)influent(s)and their nitrate/phosphate removal and by-product formations were *** reactors were seeded with a homogenized mixed microbial inoculum procured from natural sludges which were enriched over 6 months under denitrifying conditions in the presence of *** indicated that when influent containing 40 mg/L of NO_(3)^(-)−N was treated with 5 g SIF,79.9%nitrate reduction was observed in 8 days abiotically and 100%removal was accomplished in 20 days when the reactor was *** abiotic and seeded reactors removed more than 92%PO_(4)^(3−)under high DO conditions in 12 *** and biochemical removal of NO_(3)^(-)−N and abiotic removal of PO_(4)^(3−)were higher under independent NO_(3)^(-)−N/PO_(4)^(3−)loading,while 99%PO_(4)^(3−)was removed biochemically under combined NO_(3)^(-)−N and PO_(4)^(3−)*** study furthers the understandings of nitrate and phosphate removal in Zero Valent Iron(ZVI)assisted mixed microbial systems to encourage the application of SIF-supported bio-chemical processes in the simultaneous removals of these pollutants.

关键词： Scrap iron filing Nitrate removal Phosphate removal Mixed culture denitrification Zero valent iron

Deciphering environmental factors influencing phytoplankton community structure in a polluted urban river

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2025年第2期148卷 375-386页

作者： Xiaxia Li Kai Chen Chao Wang Tianyu Zhuo Hongtao Li Yong Wu Xiaohui Lei Ming Li Bin Chen Beibei Chai School of Water Conservancy and Hydroelectric Power Hebei University of EngineeringHandan 056038China Collaborative Innovation Center for Intelligent Regulation and Comprehensive Management of Water Resources School of Water Conservancy and HydroelectricHebei University of EngineeringHandan 056038China Hebei Key Laboratory of Intelligent Water Conservancy Hebei University of EngineeringHandan 056038China Tianjin Water Group Binhai Water Co. Ltd.Tianjin 300308China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China School of Architecture and Civil Engineering Xi’an University of Science and TechnologyXi’an 710054China Chengdu University of Technology Chengdu 610059China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

Tuojiang River Basin is a first-class tributary of the upper reaches of the Yangtze River—which is the longest river in *** phytoplankton are sensitive indicators of trophic changes inwater bodies,characterizing phytoplankton communities and their growth influencing factors in polluted urban rivers can provide new ideas for pollution ***,we used direct microscopic count and environmental DNA(eDNA)metabarcoding methods to investigate phytoplankton community structure in Tuojiang River Basin(Chengdu,Sichuan Province,China).The association between phytoplankton community structure and water environmental factors was evaluated by Mantel *** environmental monitoring data were used to pinpoint major factors that influenced phytoplankton growth based on structural equation *** the phylum level,the dominant phytoplankton taxa identified by the conventional microscopic method mainly belonged to Bacillariophyta,Chlorophyta,and Cyanophyta,in contrast with Chlorophyta,Dinophyceae,and Bacillariophyta identified by eDNA ***α-diversity analysis,eDNA metabarcoding detected greater species diversity and achieved higher precision than the microscopic *** growth was largely limited by phosphorus based on the nitrogen-to-phosphorus ratios>16:1 in all water *** analysis and structural equation modeling also confirmed that the nitrogen-to-phosphorus ratio was the principal factor influencing phytoplankton *** results could be useful for implementing comprehensive management of the river basin *** is recommended to control the discharge of point-and surface-source pollutants and the concentration of dissolved oxygen in areas with excessive nutrients(e.g.,Jianyang-Ziyang).Algae monitoring techniques and removal strategies should be improved in 201 Hospital,Hongrihe Bridge and Colmar Town areas.

关键词： environmental DNA Microscopic count Phytoplankton growth Structural equation modeling Tuojiang River Basin