检索结果-内蒙古大学图书馆

2D copper-iron bimetallic metal-organic frameworks for reduction of nitrate with boosted efficiency and ammonia selectivity

引用

Journal of Environmental Sciences 2025年第3期149卷 374-385页

作者： Qian Ma Yinghao Xue Chuning Zhang Yanyan Chen Wei Teng Hua Zhang Jianwei Fan State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Electrocatalytic reduction of nitrate to ammonia has been considered a promising and sustainable pathway for pollutant treatment and ammonia has significant potential as a clean ***,the method has received much *** this work,Cu/Fe 2D bimetallic metal-organic frameworks were synthesized by a facile method applied as cathode materials without high-temperature *** centers(Cu,Fe)with enhanced intrinsic activity demonstrated higher removal ***,the 2D nanosheet reduced themass transfer barrier between the catalyst and nitrate and increased the reaction ***,the catalysts with a 2D structure showed much better removal efficiency than other structures(3D MOFs and BulkMOFs).Under optimal conditions,Cu/Fe-2D MOF exhibited high nitrate removal efficiency(87.8%)and ammonium selectivity(89.3%)*** ammonium yielded up to significantly 907.2μg/(hr·mg_(cat))(7793.8μg/(hr·mg_(metal)))with Faradaic efficiency of 62.8%at an initial 100 mg N/*** catalyst was proved to have good stability and was recycled 15 times with excellent *** simulations confirm the reduced Gibbs free energy of Cu/Fe-2D *** study demonstrates the promising application of Cu/Fe-2D MOF in nitrate reduction to ammonia and provides new insights for the design of efficient electrode materials.

关键词： Metal-organic frameworks Electrochemical denitrification Ammonium selectivity 2D bimetal materials

来源：评论

学校读者我要写书评

暂无评论

C14-HSL limits the mycelial morphology of pathogen Trichosporon cells but enhances their aggregation:Mechanisms and implications

引用

Chinese Chemical Letters 2024年第6期35卷 398-403页

作者： Xin Lu Haoran Sun Xiaomeng Li Chunrui Li Jinfeng Wang Dandan Zhou Jilin Engineering Lab for Water Pollution Control and Resources Recovery School of the EnvironmentNortheast Normal UniversityChangchun 130117China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The biosecurity hazards caused by pathogenic fungus have been widely *** the long-term coexistence of eukaryotic pathogens and quorum sensing bacteria in different habitats in environments,we hypothesized that they have social interactions via signal *** this work,we firstly discovered the well-known bacterial signal molecules play an adverse role in the cell morphology and metabolism in a model pathogen Trichosporon asahii.N-Tetradecanoyl-L-homoserine lactone(C14-HSL)was discovered to increase pathogen hazards of ***,which limited mycelium by 52%,but enhanced cell aggregation by 93%.Higher fluorescence intensity of tryptophan(59%)and aromatic protein(2-fold)contents after the treatment of C14-HSL,indicating that aromatic proteins helped aggregate Trichosporon and showed *** analysis revealed that C14-HSL upregulated the shikimate pathway(above1-fold)located in downstream of tricarboxylic acid cycle,which contributed to the synthesis of more aromatic proteins and the formation of larger *** limited mycelial growth of *** attributed to the up-regulated expressions of cell cycle *** fungal transboundary response to bacterial C14-HSL was controlled by signal transduction *** study provides new insights into the co-evolution of bacterial and pathogenic fungi in microecosystems.

关键词： Bacterial C14-HSL Mycelium Cell cycle Aggregation Aromatic proteins

来源：评论

学校读者我要写书评

暂无评论

Prevalence of class 1 integron and its gene cassettes carrying antibiotic resistance genes in drinking water treatment and distribution systems

引用

Frontiers of Environmental Science & Engineering 2024年第10期18卷 115-126页

作者： Shengnan Liu Zihan Li Yan Shen Shuyu Jia Peng Liu Xu-Xiang Zhang State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China

Class 1 integrons are vital mobile genetic elements involved in the environmental transmission of antibiotic resistance genes(ARGs).However,knowledge about the diversity and abundance of class 1 integrons and gene cassettes during drinking water treatment and distribution is still *** this study,we aimed to uncover the prevalence of class 1 integrons in the drinking water treatment and distribution systems with the combination of culture-dependent and culture-independent ***,we applied the nanopore sequencing method to characterize the diversity and arrangement of ARGs carried by class 1 integron-associated gene cassettes.A total of 42 isolates were inti-positive among the 208 strains isolated from drinking water,which tended to confer multi-drug resistance compared with intll-negative *** absolute abundance of the intl1 average i.15×10^(9) copies/L in the source water and underwent the most significant reduction of over 99.9% after liquid chiorine ***,nanopore sequencing revealed that the class 1 integron-associated gene cassettes carried 51 subtypes of ARGs in drinking water,mainly conferring resistance to aminoglycosides and *** treatment processes,especially liquid chlorine disinfection,reduced most of the ARGs carried by gene cassettes,though some of the ARG subtypes persisted along the treatment and distribution ike aac(6)-Il,aadA,and *** antibiotic resistance gene cassette array laac(6')-Ⅱ arr was most frequently detected,especially in the chlorinated *** study underlined that drinking water was potential reservoir for integron-mediated ARGs transfer,indicating that the health risks of resistance gene cassettes in class 1 integrons deserved urgent attention.

关键词： Class 1 integron Antibiotic resistance genes Drinkingwater Genecassettearrays Liquid chlorine disinfection

来源：评论

学校读者我要写书评

暂无评论

Photodegradation of Chlorinated Persistent Organic Pollutants (Cl-POPs) in Pearl River Suspended Particulate Matter-Water Systems: Kinetics, Quantitative Structure-Activity Relationship (QSAR) Development, and Mechanism

引用

ENVIRONMENTAL SCIENCE & TECHNOLOGY 2025年第8期59卷 4059-4067页

作者： Teng, Xiaolei Xu, Jianqiao Wang, Zunyao Qu, Ruijuan Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210023 Jiangsu Peoples R China

Chlorinated persistent organic pollutants (Cl-POPs) are highly hydrophobic and are easily adsorbed to solid particulate matter after being released into the water column, thus affecting the transformation process and environmental fate. This study investigated the photodegradation behavior of 16 Cl-POPs in the Pearl River suspended particulate matter (SPM)-water system. The photodegradation rates of polychlorinated biphenyls (PCBs) were generally higher than those of dioxins and increased with substitution numbers of Cl atoms. A QSAR model correlating photodegradation rate constants of Cl-POPs and their structural parameters was established by using multiple linear regression (MLR) analysis and machine learning. The model results showed that soil-water partition coefficient (K OC), morgan fingerprint (mf_1747), and nucleophilicity index (NI) were the main factors affecting the photodegradation of Cl-POPs, confirming that the photodegradation of Cl-POPs with higher hydrophobicity and larger nucleophilic reactivity proceeded faster. According to the quenching experiment and theoretical calculation results, center dot O2 - in the hydrophobic region contributed more to the strongly hydrophobic Cl-POPs, while the contribution of center dot OH was mainly concentrated in the weakly hydrophobic Cl-POPs. This study provided valuable insights into photolysis-related environmental persistence and fate of Cl-POPs in the SPM-water system.

关键词： chlorinated persistent organic pollutants QSAR photodegradation machine learning reactive oxygenspecies

来源：评论

学校读者我要写书评

暂无评论

Bisphenol A removal with nitrification and denitrification: Occurrence, mechanism, and microbial mutualism

引用

CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY 2025年第8期55卷 553-577页

作者： Cao, Xuekang Liu, Chao Zhang, Xuemeng Huang, Haining Fan, Xinyun Chen, Chuang Duan, Xu Chen, Yinguang Tongji Univ Sch Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai Peoples R China

Bisphenol A (BPA) is an emerging contaminant that disrupts endocrine systems and poses significant risks to organisms. It is increasingly detected in municipal wastewater due to its widespread use and high production volume. Despite this, gaps remain in understanding the sources of BPA in municipal wastewater, its effects on nitrification and denitrification, and the potential for its co-removal with ammonia or nitrate during biological nitrogen removal processes. This review first examines the sources of BPA, primarily from industrial effluents and landfill leachates, which enter wastewater treatment plants alongside domestic sewage. Additionally, it meticulously elucidated the influences, co-removal with nitrogen performance, and biotransformation mechanisms of BPA during nitrification and denitrification processes, shedding light on biotransformation pathways, functional microbes and key enzymes. While there is no consensus on BPA removal in anoxic conditions, aerobic environments support its biodegradation through various microorganisms. Lastly, the potential for microbial cooperation to enhance BPA and nitrogen co-removal is discussed, focusing on bacterial mutual alliances and bacteria-algae metabolic interaction consortiums. This review provides valuable guidance for the synergistic removal of BPA and nitrogen in wastewater treatment processes.

关键词： Bisphenol A denitrification endocrine disruptors microbial cooperation nitrification

来源：评论

学校读者我要写书评

暂无评论

Catalytic CO oxidation on CeO2-based materials: Modification strategies, structure-performance relationships, challenges and prospects

引用

SEPARATION AND PURIFICATION TECHNOLOGY 2025年 359卷

作者： Liu, Shuyi Xue, Yinghao Jia, Yan Wang, Hanxue Nie, Qing Fan, Jianwei Tongji Univ Coll Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai 200092 Peoples R China

Catalytic oxidation of carbon monoxide (CO) has gained increasing interest in recent years due to its promising applications. Cerium-based catalysts have been widely employed in CO oxidation processes due to their reversible oxygen storage/release capacity (OSC), excellent redox activity, and the most abundant rare earth element in the crust (46 ppm). However, conventional CeO2 catalysts still face challenges of insufficient activity and poor stability. Herein, strategies to enhance the activity of CeO2 catalysts are detailed, including crystal facet engineering, metal-support modification, and heteroatom doping. In conclusion, these strategies aim to increase the number of oxygen vacancies, optimize surface active sites, and strengthen the metal-support interaction, thereby significantly improving the activity of catalytic CO oxidation.

关键词： CO detoxification Catalytic oxidation Cerium-based catalysts Mechanism Modification

来源：评论

学校读者我要写书评

暂无评论

Photocatalytic degradation of alkyl imidazole ionic liquids by TiO2 nanospheres under simulated solar irradiation: Transformation behavior, DFT calculations and promoting effects of alkali and alkaline earth metal ions

引用

JOURNAL OF HAZARDOUS MATERIALS 2024年 461卷

作者： Xiao, Xuejing Guo, Ruixue Qi, Yumeng Wei, Junyan Wu, Nannan Zhang, Shengnan Qu, Ruijuan Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210023 Jiangsu Peoples R China

In this study, TiO2 nanospheres prepared by the sol-gel method were found to efficiently catalyze the photo-degradation of 1-butyl-2,3-dimethylimidazolium bromide salt ([BMMIm]Br) under simulated solar irradiation through the main attack of hydroxyl radicals ( OH). The promoting effect of alkali metal (Li+-> Cs+) and alkaline earth metal ions (Mg2+-> Ba2+) was particularly emphasized. In-situ EPR tests showed that the introduction of alkali and alkaline earth metal ions could enhance the formation ofOH thus leading to a 7%-30.3% increase in the degradation efficiency of. [BMMIm](+). Moreover, the removal efficiency of [BMMIm](+) still reached > 96.19% in four real waters. A total of 23 products of [BMMIm]Br were detected, and hydroxyl substitution, bond breaking, direct oxidation and ring opening were considered as the main reactions during the photocatalytic degradation process. The results of toxicity evaluation showed that hydroxylation was a reaction process of increasing toxicity, while the bond breaking reaction had great detoxification capacity for [BMMIm](+). These findings may enhance our understanding on the effects of alkali or alkaline earth metal ions on the photocatalytic activity of TiO2, which could also provide reference for the efficient and green removal of alkylimidazolium ionic liquids in waters.

关键词： Photocatalysis Alkyl imidazole ionic liquids TiO (2) nanospheres Alkali and alkaline earth metal ions Reaction mechanism

来源：评论

学校读者我要写书评

暂无评论

Photocatalytic degradation of decabromodiphenyl ethane (DBDPE) by wide solar spectrum-responsive nitrogen doped silica

引用

JOURNAL OF CLEANER PRODUCTION 2024年 458卷

作者： Qi, Yumeng Zhang, Shengnan Cao, Wenqian Wu, Nannan Wei, Zhongbo Wang, Zunyao Qu, Ruijuan Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210023 Jiangsu Peoples R China

As a novel non-metal photocatalyst, silica is promising in the removal of persistent organic pollutants. In this study, wide-spectrum responsive nitrogen doped silica (N-SiO2) was self-prepared for the effective adsorption and photocatalytic degradation of decabromodiphenyl ethane (DBDPE) under simulated sunlight. Due to the energy level structure change by N doping and Raman scattering of SiO2, N-SiO2 could utilize near-infrared (NIR) light to degrade DBDPE. Various reactive oxygen species (ROS) could be generated over N-SiO2, and the relative contribution to DBDPE removal was in the order of O-2 center dot(-) approximate to center dot OH > O-1(2). Moreover, the ubiquitous phenolic acids in wastewater could improve the photocatalytic performance of N-SiO2, which was attributed to enhanced generation of various ROS through photosensitization of phenolic acids and chain reaction of O-2 center dot(-). Based on the products identified by mass spectrometry, hydroxylation, debromination and bond breaking reactions were proposed as the major degradation pathways of DBDPE. Various reaction mechanisms of DBDPE, including direct photolysis and ROS mediated indirect photodegradation were further confirmed by density functional theory calculations. This study constructed an "adsorption-broad spectrum (Vis-NIR) responsive photocatalytic degradation" two-stage reaction system to efficiently degrade hydrophobic organic pollutants, and the potential promoting mechanism of coexisting phenolic acids was revealed.

关键词： Nitrogen doped silica Decabromodiphenyl ethane Near-infrared (NIR) light response anti-Stokes process Photocatalytic mechanism Phenolic acids

来源：评论

学校读者我要写书评

暂无评论

Environmental transformation and hazards of decachlorobiphenyl on suspended particles under sunlight irradiation

引用

JOURNAL OF HAZARDOUS MATERIALS 2024年 473卷 134630页

作者： Xu, Jianqiao Wei, Junyan Guo, Ruixue Zhang, Shengnan Teng, Xiaolei Wang, Zunyao Qu, Ruijuan Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210023 Jiangsu Peoples R China

Decachlorobiphenyl (PCB-209) can be widely detected in suspended particles and sediments due to its large hydrophobicity, and some of its transformation products may potentially threaten organisms through the food chain. Here we investigate the photochemical transformation of PCB-209 on suspended particles from the Yellow River. It was found that the suspended particles had an obvious shielding effect to largely inhibit the photodegradation of PCB-209. Meanwhile, the presence of inorganic ions (e.g. Mg2+ and NO3- ) and organic matters (e. g. humic acid, HA) in the Yellow River water inhibited the reaction. The main transformation products of PCB209 were lower-chlorinated and hydroxylated polychlorinated biphenyls (OH-PCBs), and small amounts of pentachlorophenol (PCP) and polychlorinated dibenzofurans (PCDFs) were also observed. The mechanisms of PCP formation by double center dot OH attacking carbon bridge and PCDFs formation by elimination reaction of ionic state OH-PCBs were proposed using theoretical calculations, which provided some new insights into the intertransformations between persistent organic pollutants. In combination with VEGA and EPI Suite software, some intermediates such as PCDFs were more toxic to organisms than PCB-209. This study deepens the understanding of the transformation behavior of PCB-209 on suspended particles under sunlight.

关键词： Decachlorobiphenyl Photoconversion Suspended particles Theoretical calculations Toxicity prediction

来源：评论

学校读者我要写书评

暂无评论

Photodegradation of 2-chlorodibenzo-p-dioxin (2-CDD) on the surface of municipal solid waste incineration fly ash: Kinetics and product analysis

引用

ENVIRONMENTAL pollution 2024年 346卷 123621页

作者： Zhang, Ying Wu, Nannan Cao, Wenqian Guo, Ruixue Zhang, Shengnan Qi, Yumeng Qu, Ruijuan Wang, Zunyao Nanjing Univ Sch Environm State Key Lab Pollut Control & Resources Reuse Nanjing 210023 Jiangsu Peoples R China

Considering that waste incineration fly ash is the main carrier of dioxins and can migrate over long distances in the atmosphere, it is of great significance to study the photochemical transformation behavior of dioxins on the surface of fly ash. In this work, 2-chlorodibenzo-p-dioxin (2-CDD) was selected to conduct a systematic photochemical study. The influence of various factors on the photodegradation of 2-CDD were first explored, and the results showed that small particle size of fly ash, low concentration of 2-CDD and appropriate level of humidity were more conducive to photodegradation, with the highest degradation percentage reaching 76%-84%. The components of fly ash (Zn (II), Al (III), Cu (II) and SiO2) also had a certain promoting effect on the degradation of 2-CDD, which increases the degradation efficiency by 10%-20%, because they could act as effective photocatalysts to produce free radicals for reaction. With a higher total light exposure intensity, natural light environments led to a more complete degradation of 2-CDD than laboratory Xe lamp irradiation (90% degradation Vs. 79% degradation). Based on chemical probe and radical quenching experiment, hydroxyl radical also contributed to 2-CDD photodegradation on fly ash. A total of 16 intermediate products were detected by mass spectrometry analysis, and four initial reaction pathways of 2-CDD were speculated in the process, including dechlorination, ether bond cleavage, hydroxyl substitution, and hydroxyl addition. According to the results of density functional theory calculation, the reaction channels of ether bond cleavage and center dot OH attack were determined. The toxicity assessment software tool (TEST) was used to assess the toxicity and bioconcentration coefficient of reaction products, and it was found that the overall toxicity of the photodegradation products was reduced. This study would provide new insights into the environmental fate of dioxins during long-range atmospheric migration pro

关键词： Waste incineration fly ash 2-Chlorodibenzo-p-dioxin Photodegradation Kinetics Reaction products

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：