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Anthropogenic Oxygenated Volatile Organic Compounds Dominate Atmospheric Oxidation Capacity and Ozone Production via Secondary Formation of Formaldehyde in the Urban Atmosphere

ACS ES&T Air

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ACS ES&T Air 2025年第6期2卷 1033-1041页

作者： Hongtao Qian Bingye Xu Zhengning Xu Qiaoli Zou Qianxin Zi Hanfei Zuo Fei Zhang Jing Wei Xiangyu Pei WenXin Zhou Lingling Jin Xudong Tian Wenlong Zhao Zhibin Wang State Key Laboratory of Soil Pollution Control and Safety Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China Ecological and Environmental Monitoring Center of Zhejiang Province Hangzhou 310012 China；Key Laboratory of Ecological and Environmental Monitoring Forewarning and Quality Control of Zhejiang Province Hangzhou 310012 China Ecological and Environmental Monitoring Center of Zhejiang Province Hangzhou 310012 China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental Sciences Shanghai 200233 China State Key Laboratory of Soil Pollution Control and Safety Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China；ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 311200 China

Oxygenated volatile organic compounds (OVOCs) play an important role in the photochemical formation of ozone (O3). Comprehensive measurements and chemical box model analysis conducted in Hangzhou, China reveal that the formation of O3is strongly attributed to the increased atmospheric oxidation capacity (AOC). The observed OVOCs contribute 46.5 ± 8.3% to the AOC, especially during the pollution periods, with formaldehyde (HCHO) and acetaldehyde (CH3CHO) accounting for 19 ± 3.8% and 13.8 ± 4.1%, respectively. Various OVOCs (especially CH3CHO) act as key precursors for the initial production of the crucial radicals. These include the hydroperoxy radical (HO2), methyl peroxy radical (CH3O2), and acetyl peroxy radical (CH3CO3), accounting for 53.7 ± 5.0%, 13.9 ± 2.5%, and 10.0 ± 2.4% of the daytime O3production (P(O3)), respectively. HCHO acted as the key accelerator of HO2radical production and subsequently speeded up O3production. Model simulation and observational evidence reveal that the OVOC initiated secondary channel dominates the HCHO formation. The radical propagation chain of CH3CO3→ CH3O2→ CH3O→ HO2accounts for 62.4 ± 6.9% of HCHO production. CH3CHO chemistry can account for 14.0% of the production of O3, and degradation of secondary HCHO derived from CH3CHO accounts for 5.2% of total HO2production. These findings underscore the significant effect of OVOCs, particularly CH3CHO, on AOC and O3production in the urban atmosphere in eastern China. Given the decreasing trend of NOXconcentration, model simulations under different NOXlevels further imply that reducing anthropogenic emission sources of OVOCs is a crucial strategy for current O3control, and excessive reduction of NOXemissions (the daytime average concentration of NOXdecreases to below ∼ 2 ppb) may affect the effectiveness of reducing VOCs and promote a radical self-reaction.

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Effect of CeO_(2) Nanoparticles on the Spread of Antibiotic Resistance in a Reclaimed Water-Soil-Radish System-Shenzhen City,Guangdong Province,China,April 2023

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China CDC weekly 2023年第46期5卷 1029-1037,I0005-I0007页

作者： Kaiqiang Yu Bixi Zhao Yuxi Yan Qing Yang Liming Chen Yu Xia School of Environmental Science and Engineering College of EngineeringSouthern University of Science and TechnologyShenzhen CityGuangdong ProvinceChina School of Resource Environment and Life ScienceNingxia Normal UniversityGuyuan CityGansu ProvinceChina State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen CityGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen CityGuangdong ProvinceChina

ABSTRACT Introduction:The use of reclaimed water(RW)for irrigation in agricultural practices raises concerns regarding the dissemination of antibiotic resistance genes(ARGs)from soils to edible *** effectiveness of na... 详细信息

关键词： Antibiotic Guangdong claimed

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Pyrrhotite-sulfur-limestone composite for high rate nitrogen and phosphorus removal from wastewater: Column study

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Chemosphere 2024年 347卷 140711页

作者： Yang, Yinuo Huang, Gaopan Chen, Changxin Li, Ruihua State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 163# Xianlin Avenue Nanjing210023 China

Pyrrhotite-sulfur-limestone composite (PSLC) was prepared and PSLC autotrophic denitrification biofilter (PSLCAD) was constructed with PSLC particle (2–4.75 mm) in this study. During treating synthetic, municipal and industrial secondary effluent, PSLCAD showed good NO3−-N and PO43--P removal, and the highest TON (Total oxidized nitrogen) removal rate of PSLCAD was up to 1749.91 mg/L/d. At HRT 0.5 h, and influent NO3−-N 21.09 mg/L, TON removal rate was up to 1005.12 mg/L with effluent NO3−-N 0.10 mg/L. PSLCAD achieved effluent PO43--P below 0.2 mg/L when influent PO43--P was around 0.5 mg/L. HRT down to 0.5 h had no negative impacts on N removal. Effluent pH below 7 was harmful to denitrification performance of PSLCAD. TON removal rate increased with influent NO3−-N increasing, but influent NO3−-N over 103.55 mg/L decreased NO3−-N removal rate. In PSLCAD biofilter, the most dominant bacteria were Thiobacillus and Sulfurimonas, and they played the most important role in denitrification, but the abundance of heterotrophic denitrifiers was also quite high. PO43− was mainly removed through precipitate of Fe–P in PSLCAD. The synergistic effects between pyrrhotite and sulfur autotrophic denitrification were much enhanced, and that caused PSLCAD to achieve high rate N and P removal. © 2023 Elsevier Ltd

关键词： Limestone

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Reproductive toxicity and underlying mechanisms of di(2-ethylhexyl) phthalate in nematode Caenorhabditis elegans

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Journal of Environmental Sciences 2021年第7期33卷 1-10页

作者： Jingjing Li Man Qu Mei Wang Ying Yue Zhaofang Chen Ran Liu Yuanqing Bu Yunhui Li Key Laboratory of Environmental Medicine Engineering Ministry of EducationSchool of Public HealthSoutheast UniversityNanjing 210009China State Key Laboratory of Pollution Control&Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Nanjing Institute of Environmental Science Key Laboratory of Pesticide Environmental Assessment and Pollution ControlMinistry of Ecology and EnvironmentNanjing 210042China

DEHP(di(2-ethylhexyl) phthalate) is an endocrine disruptor commonly found in plastic products that has been associated with reproduction alterations, but the effect of DEHP on toxicity is still widely unknown. Using DEHP concentrations of 10, 1, and 0.1 mg/L, we showed that DEHP reduced the reproductive capacity of Caenorhabditis elegans after 72 hr. of exposure. DEHP exposure reduced the reproductive capacity in terms of decreased brood sizes, egg hatchability(0.1, 1 and 10 mg/L), and egg-laying rate(1 and 10 mg/L), and increased numbers of fertilized eggs in the uterus(1 and 10 mg/L). DEHP also caused damage to gonad development. DEHP decreased the total number of germline cells, and decreased the relative area of the gonad arm of all exposure groups, with worms in the 1 mg/L DEHP exposure group having the minimum gonad arm area. Additionally, DEHP caused a significant concentration-dependent increase in the expression of unc-86. Autophagy and ROS contributed to the enhancement of DEHP toxicity in reducing reproductive capacity, and glutathione peroxidase and superoxide dismutase were activated as the antioxidant defense in this study. Hence, we found that DEHP has a dual effect on nematodes. Higher concentration(10 mg/L) DEHP can inhibit the expression of autophagy genes( atg-18, atg-7, bec-1, lgg-1 and unc-51), and lower concentrations(0.1 and 1 mg/L) can promote the expression of autophagy genes. Our data highlight the potential environmental risk of DEHP in inducing reproductive toxicity toward the gonad development and reproductive capacity of environmental organisms.

关键词： DEHP Brood sizes Autophagy Reactive oxygen species Superoxide dismutase Glutathione peroxidase

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Predicting Bioaccumulation of Nanomaterials:Modeling Approaches with Challenges

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Environment & Health 2024年第4期2卷 189-201页

作者： Hang Zeng Zhuoyan Lv Xiaoyan Sun Yang Tong Wei Wu Shipeng Dong Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentChemistry and Biomedicine Innovation CenterNanjing UniversityNanjing 210023China Nanjing Qixia District Hospital Nanjing 210023China High Tech Research and Development Center Ministry of Science and TechnologyBeijing 100044China

Understanding the bioaccumulation of nanomaterials(NMs)by organisms is essential in evaluating their potential ***,the experimental determination of bioaccumulation is substantially challenging,which spawned the development of prediction approaches via establishing models for various *** modeling approaches,such as the biotic ligand model(BLM),partition coefficients,accumulation factor models,and quantitative structure−activity relationship(QSAR)models,were initially used in the application of NMs,aiming to provide a reliable quantitative dose in a resource-saving *** methods,which are based on the uptake patterns of substances,probably lead to deviated results due to the different uptake behaviors of *** this study,currently developed models to evaluate the bioaccumulation of NMs are critically reviewed,with their feasibilities and limitations being *** addition,the recently developed machine learning amended models have taken great efforts in realizing biological behaviors of NMs in organisms by providing in silico *** this data-driven approach has limitations in mechanism exploration,it may give different insights into the bioaccumulation model establishment and critical feature identification.

关键词： Modeling Forecast Bioaccumulation Nanomaterials Machine learning

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Fast and efficient remediation of antimony-contaminated surface water and field soil using alumina supported Fe–Mn binary oxide

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Chemosphere 2024年 364卷 143165页

作者： Gong, Yanyan Bai, Yang Ye, Peilin Li, Hongbo College of Environment and Climate Guangdong Provincial Key Laboratory of Environmental Pollution and Health Jinan University Guangzhou511443 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Antimony (Sb) pollution in surface water and soil has earned extensive attention. Our previous study synthesized a new class of alumina supported Fe–Mn binary oxide (Fe–Mn@Al2O3) and found that MnO2 in the composite oxidized Sb(III) to Sb(V) and FeOOH and Al2O3 played an indispensable role in adsorption of Sb(III) and Sb(V). This study further explored the removal of Sb in surface water and in situ sequestration of Sb in Sb-contaminated field soil via Fe–Mn@Al2O3. Sb removal from water was pH independent and the removal efficiencies of Sb(III) and total Sb kept constant at 95.4% and 60.5%, respectively, over a pH range of 5.0–10.0. Increasing dissolved organic matter (DOM) from 0 to 22.8 mg/L had negligible effect on Sb(III) removal whereas inhibited the total Sb removal from 60.5% to 51.2%. Dissolved oxygen cannot oxidize aqueous Sb(III), yet, enhanced the Sb(III) removal whereas decreased the total Sb removal. The composite performed well in natural surface water with high DOM and inorganic ligands. In addition, the composite effectively immobilized Sb in field soil. 5% of the composite significantly inhibited the H2SO4 and HNO3 leachable Sb by 93.6% after 30 d. The amendment transformed the Sb speciation from more easily available fractions (i.e., exchangeable, carbonate-bound, and Fe–Mn oxides-bound species) into more stable fractions (i.e., organic material bound and residual species), leading to declined Sb bioaccessibility and reduced environmental risk. The composite facilitated a long-term stability of Sb in soil. The study demonstrated an easy, fast, and effective strategy for efficient immobilization of Sb in water and soil. © 2024

关键词： Heavy metals

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Nano Fe_(2)O_(3)embedded in montmorillonite with citric acid enhanced photocatalytic activity of nanoparticles towards diethyl phthalate

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Journal of Environmental Sciences 2021年第3期33卷 248-259页

作者： Zhaoyue Sun Lisha Feng Guodong Fang Longgang Chu Dongmei Zhou Juan Gao Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Nano-Fe_(2)O_(3)embedded in montmorillonite particles(Fe-Mt)were prepared to degrade diethyl phthalate(DEP)with citric acid(CA)under xenon light *** to pristine montmorillonite(Na-Mt),the embedding process increased 14.5-fold of iron content and 1.8-fold of specific surface *** synthesized Fe-Mt have more oxygen vacancies than Fe_(2)O_(3)nanoparticles(nFe_(2)O_(3)),which could induce more reactive oxygen species(ROSs)generation in the presence of CA under xenon lamp ***-Mt with CA enhanced photo-assisted degradation of DEP 2.5 times as compared to nFe_(2)O_(3)with *** experiments,electron paramagnetic resonance(EPR)spectroscopy and identification of products confirmed that surface-bound·OH was the main radical to degrade *** anions(i.e.,NO_(3)-,CO_(3)^(2-),Cl^-)and humic acid could compete·OH with DEP and cause slower degradation of *** removal efficiency of DEP was more than 56%with Fe-Mt after three recycles,and the dissolved Fe concentration from Fe-Mt was below 75μmol/L,indicating Fe-Mt had a good stability as a ***-Mt together with CA appeared to be a promising strategy to remove organic pollutants in surface water,or topsoil under solar irradiation.

关键词： Heterogeneous catalyst Hydroxyl radical Photo-Fenton reactions Phthalate ester

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Self-powered temperature-changing system driven by wind energy

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Microsystems & Nanoengineering 2024年第5期10卷 171-180页

作者： Jiayu Li Boxun Liu Mingyang Li Yahui Li Wangyang Ding Guanlin Liu Jun Luo Nan Chen Lingyu Wan Wenjuan Wei Center on Nanoenergy Research Institute of Science and Technology for Carbon Peak&NeutralityGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Physical Science&TechnologyGuangxi UniversityNanning 530004China Department of Chemistry and the Tsinghua Center for Frontier Polymer Research Tsinghua UniversityBeijing 100084PR China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jjao Tong UniversityShanghai 200240PR China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materialsand School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Research on outdoor,mobile,and self-powered temperature-control devices has always been highly *** devices can reduce energy consumption for cooling and heating,and they have broad market *** this basis,a rotary disc-shaped triboelectric nanogenerator(TENG)with a maximum open-circuit voltage of 6913 V,a maximum short-circuit current of 85μA,and a maximum transferred charge of 1.3μC was *** synthesized a ferroelectric ceramic composed of 0.15PbTiO_(3)-0.85PbSc_(o.5)Ta_(o.5)O_(3)(0.15PT-0.85PST),which exhibited excellent electrothermal effects at room *** quenching,the electrothermal effect(A Tmax)and energy harvesting properties of the device were 1.574 K and 0.542 J/cm3,***,for the frst time,we proposed a self-powered temperature quantification control system with a rotary disc-shaped *** device effectively harnessed wind and water energy,in addition to other types of *** system consisted of energy collecting cups,a rotating disc-shaped FEP-rabbit fur TENG,a circuit management module,and a ferroelectric ceramic chip *** the circuit management module,the system converted external wind energy into a high-voltage electric field at the two ends of the 0.15PT-0.85PST ceramic chip to fully stimulate the electrothermal *** a speed of 200 rpm,the temperature change in the insulated cup within 276 s was 0.49 K,and the volume of the insulated cup was 300 times greater than that of the 0.15PT-0.85PST ceramic *** with the results reported in previous work,the cooling and heating times were both reduced by 31%,and the temperature changes for both cooling and heating increased by 81%.Moreover,the heating and cooling temperatures of the device optimized on this basis were increased to 1.19K and 0.93 K,*** great improvement in the temperature variation performance confrmed the great potential of the device for *** research could serve as a reference for reduci

关键词： ceramic shaped ferroelectric

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Variation characteristics of fine particulate matter and its components in diesel vehicle emission plumes

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Journal of Environmental Sciences 2021年第9期33卷 138-149页

作者： Xianbao Shen Jiateng Hao Lei Kong Yue Shi Xinyue Cao Jiacheng Shi Zhiliang Yao Xin Li Bobo Wu Yiming Xu Kebin He State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China School of Ecology and Environment Beijing Technology and Business UniversityBeijing 100048China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

A rapid reaction occurs near the exhaust nozzle when vehicle emissions contact the *** diesel vehicles were studied using a new multipoint sampling system that is suitable for studying the exhaust plume near the exhaust *** variation characteristics of fine particle matter(PM_(2.5)) and its components in diesel vehicle exhaust plumes were *** PM_(2.5) emissions gradually increased with increasing distance from the nozzle in the *** carbon emissions remained basically unchanged, organic carbon and total carbon(TC) increased with increasing *** concentrations of SO_(4)^(2-),NO_(3)^(-) and NH_(4)^(+) (SNA) directly emitted by the vehicles were very low but increased rapidly in the exhaust *** selective catalytic reduction(SCR) reduced 42.7% TC, 40% NO_(3)^(-) emissions, but increased 104% SO_(4)^(2-) and 36% NH_(4)^(+) emissions, *** summary,the SCR reduced 29% primary PM_(2.5) emissions for the tested diesel *** NH_(4)NO_(3) particle formation maybe more important in the plume, and there maybe other forms of formation of NH_(4)^(+) (***4Cl).The generation of secondary organic carbon(SOC) plays a leading role in the generation of secondary PM_(2.5).The SCR enhanced the formation of SOC and SNA in the plume, but comprehensive analysis shows that the SCR more enhanced the SNA formation in the plume, which is mainly new particles formation *** inconsistency between secondary organic aerosol(SOA) and primary organic aerosol definitions is one of the important reasons for the difference between SOA simulation and observation.

关键词： Variation characteristics Diesel vehicle Emission plume PM2.5 Components

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A core–shell-structured zeolitic imidazolate framework@cationic antimicrobial agent templated silica nanocomposite for tackling antibiotic resistant bacteria infection

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Aggregate 2024年第3期5卷 397-408页

作者： Qihui Kan Yaping Song Yining Yao Jun Zhang He Xian Dan Cheng Yue Wang Liang Mao Meiyan Wang Chengzhong Yu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjingChina Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueenslandAustralia School of Chemistry and Molecular Engineering East China Normal UniversityShanghaiP.R.China School of Life Sciences East China Normal UniversityShanghaiP.R.China

Bacterial infection is a major threat to public *** offers a solu-tion by combining nanomaterials with antibacterial *** development of an effective nanocomposite against drug-resistant bacteria such as methicillin-resistant Staphylococcus aureus(MRSA)is highly important yet ***,an anti-MRSA core–shell structure is designed,containing antibacterial zeolitic imidazolate framework-8(ZIF-8)as the core and bactericidal benzalkonium chloride(BAC)templated rough-surface mesostructured silica nanocomposite(RMSN)as the *** resultant ZIF-8@RMSN nanocomposite exhibits sustained release of BAC and zinc ions,effective disruption of the bacterial membrane,generation of oxidative damage of bacterial DNA,leakage of intracellular components,andfinally bacte-rial ***,the synergistic antibacterial mechanisms lead to enhanced biofilm elimination *** addition,the ZIF-8@RMSN-modified band-aid effectively combats MRSA infection in *** work has provided a promising nanocomposite against MRSA-related infections.

关键词： benzalkonium chloride core–shell structure mesoporous silica metal organic framework methicillin-resistant Staphylococcus aureus

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