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Mesoporous LaCoO3 perovskite oxide with high catalytic performance for NOx storage and reduction

Journal of Hazardous Materials 2022年 431卷 128528页

作者： Xie, Wen Xu, Guangyan Zhang, Yan Yu, Yunbo He, Hong State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China

A mesoporous LaCoO3 perovskite oxide (LaCoO3-Meso) with three-dimensionally ordered helical interwoven structure was synthesized by a nano-casting method using KIT-6 as the hard template. The obtained LaCoO3-Meso with high surface area was tested for its catalytic performance in the NOx storage and reduction (NSR) reaction and compared with a sample synthesized by the conventional sol-gel method. The LaCoO3-Meso showed a significant advantage for NOx storage, with a NOx storage capacity 2 times higher than the regular sample. LaCoO3-Meso also exhibited improved NSR catalytic performance in the 150–450 °C temperature range, especially within 350–400 °C, where the NOx conversion was raised for 40%. The results of X-ray photoelectron spectroscopy and X-ray absorption fine structure measurements suggested the presence of a high concentration of oxygen defects on the LaCoO3-Meso surface. Further results provided by temperature programmed reduction and temperature programmed desorption indicated that the oxygen defects not only increase the amount of trapped NOx, but also improve the low-temperature redox performance of the catalyst. The lower stability of NOx species adsorbed on oxygen defects promotes the NOx release step in the NSR reaction and benefits the regeneration of storage sites. © 2022 Elsevier B.V.

关键词： Lanthanum compounds

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Microbial Characteristics Reveal the Potential Effects of Ni (Ii) Stress on Nitrogen Removal and Biofilm Formation in Biofilm-Activated Sludge Reactor

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SSRN 2023年

作者： Wei, Jun Xiao, Huang Hou, Wanli Zheng, Zhihao Zhou, Guorun Yu, Jianghua Jiang, Jiahong Zhou, Jianfeng Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Key Laboratory of Marine Environmental Science and Ecology of Ministry of Education College of Environmental Science and Engineering Ocean University of China Qingdao266100 China New York University New YorkNY10012 United States Shenzhen518038 China

For evaluating the effect of Ni (II) stress on nitrogen (N) removal performance, four sequencing batch biofilm reactors (SBBR) with different concentrations of Ni (II) (0, 0.5, 2.5, 5 mg L-1, respectively) were set up to reveal the biofilm formation and its biological mechanism. Results showed that the removal efficiencies of ammonia nitrogen (NH4+-N) and total nitrogen (TN) decreased from 98.03% and 83.18% to 87.82% and 66.77%, respectively, with the increasing concentration of Ni (II) (0- 5 mg L-1). The addition of Ni (II) significantly (p © 2023, The Authors. All rights reserved.

关键词： Nitrogen removal

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The diversity and ecological significance of microbial traits potentially involved in B_(12) biosynthesis in the global ocean

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mLife 2023年第4期2卷 416-427页

作者： Jiayin Zhou Wei Qin Xinda Lu Yunfeng Yang David Stahl Nianzhi Jiao Jizhong Zhou Jihua Liu Qichao Tu Institute of Marine Science and Technology Shandong UniversityQingdaoChina Joint Lab for Ocean Research and Education at Dalhousie University Shandong University and Xiamen UniversityQingdaoChina School of Biological Sciences University of OklahomaNormanOklahomaUSA Department of Civil and Environmental Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijingChina Department of Civil and Environmental Engineering University of WashingtonSeattleWashingtonUSA Institute of Marine Microbes and Ecospheres Xiamen UniversityXiamenChina Earth and Environmental Sciences Lawrence Berkeley NationalLaboratoryBerkeley CaliforniaUSA Institutefr Environmental Genomics University of OklahomaNormanOklahomaUSA School of Civil Engineering and Environmental Sciences University of OklahomaNormanOklahomaUSA School of Computer Sciences University of OklahomaNormanOklahomaUSA DermBiont Inc. BostonMassachusettsUSA

Cobalamin(B_(12)),an essential nutrient and growth cofactor for many living organisms on Earth,can be fully synthesized only by selected prokaryotes in ***,microbial communities related to B_(12) biosynthesis could serve as an example subsystem to disentangle the underlying ecological mechanisms balancing the function and taxonomic make-up of complex functional *** anchoring microbial traits potentially involved in B_(12) biosynthesis,we depict the biogeographic patterns of B_(12) biosynthesis genes and the taxa harboring them in the global ocean,despite the limitations of detecting de novo B_(12) synthesizers via metagenomes *** the taxonomic and functional composition of B_(12) biosynthesis genes were strongly shaped by depth,differentiating the epipelagic zones from the mesopelagic *** genes related to B_(12) biosynthesis were relatively stably distributed across different oceans,but the taxa harboring them varied considerably,showing clear functional redundancy among microbial *** taxa carrying B_(12) biosynthesis genes in the surface water were influenced by environmental factors such as temperature,oxygen,and ***,the composition of functional genes was only weakly associated with these environmental *** model analyses demonstrated that determinism governed the variations in B_(12) biosynthesis genes,whereas a higher degree of stochasticity was associated with taxonomic *** associations were observed between the chlorophyll a concentration and B_(12) biosynthesis,confirming its importance in primary production in the global *** results of this study reveal an essential ecological mechanism governing the assembly of microbes in nature:the environment selects for function rather than taxonomy;functional redundancy underlies stochastic community assembly.

关键词： B_(12)biosynthesis community assembly functional genes functional redundancy ocean primary production

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Use of Passive Sampling in Edna Metabarcoding Technology: Monitoring of Fish Diversity in the Jiangmen Coastal Waters

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SSRN 2023年

作者： Zhang, Li Zhou, Weiguo Jiao, Mengyu Xie, Tian Xie, Mujiao Li, Hanying Suo, Anning Yue, Weizhong He, Weihong Ding, Dewen Guangzhou510301 China Guangzhou510301 China Guangzhou510301 China University of Chinese Academy of Sciences Beijing100049 China Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and Utilization Institute of Zoology Guangdong Academy of Sciences Guangzhou510260 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Guangzhou51145 China

environmental DNA (eDNA) metabarcoding technology is proving to be the most up-to-date and promising method for monitoring of marine fish diversity. Fish eDNA is usually collected on a filter membrane after the filtration of water. Not only does this require the use of specialized equipment, but the amount of filtered water needed is also difficult to meet. The recently proposed passive eDNA collection method can expand the sampling scale, providing new perspectives for monitoring of marine biodiversity. The role of collection methods in eDNA surveys, however, remains unclear. In this study, a low-cost custom framework with two types of filter membrane materials was used to conduct passive submersion samplings at the north and south ends of Shangchuan Island, Jiangmen, China. After defined periods of submersion, the filter membranes were recovered and eDNA extracted. Metabarcoding techniques were applied to detect fish species information in the eDNA samples. A total of 106 marine fish species from 27 orders, 53 families, and 92 genera, including one cartilaginous fish, were identified in the samples. The majority of fish detected by active filtration were also found in the passively collected samples, within the same location. Both sampling methods, therefore, showed similar species richness. Passive sampling was effective in identifying fish species diversity and provided a higher spatial resolution owing to the sample replicates. Passive sampling was also more sensitive in detecting differential species at different sampling depths. For sampling sites with low filtration efficiency, or when large-scale sampling is the purpose of the study, passive sampling methods certainly provide a promising alternative. The findings of our study provide guidance for fish surveys, continuous bio-stereoscopic monitoring in coastal waters, and coastal ecological management. © 2023, The Authors. All rights reserved.

关键词： Fish

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Significant Impact of Water-Soluble Organic Matter on Hygroscopicity of Fine Particles Under Low Relative Humidity Condition

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SSRN 2023年

作者： Tao, Jun Zhang, Zhisheng Zhang, Leiming Wu, Yunfei Wu, Zhijun Nie, Fuli Chen, Laiguo Wang, Boguang Institute for Environmental and Climate Research Jinan University Guangzhou China South China Institute of Environmental Sciences Ministry of Ecology and Environmental Guangzhou China Air Quality Research Division Science and Technology Branch Environment and Climate Change Canada Toronto Canada Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China

Uncertainties in estimating the hygroscopicity of bulk aerosols under low relative humidity (RH) conditions remain to be significant, mainly due to the presence of water-soluble organic matter (WSOM). To quantify the contributions of WSOM to aerosol hygroscopicity and associated uncertainties, a field campaign was conducted to measure the hygroscopic growth curve (f(RH)) of bulk aerosols online, dominant chemical compositions in PM2.5 online and offline, and size distributions of the dominant chemical compositions offline during the dry and wet seasons of 2019-2020 in urban Guangzhou of south China. Based on the measured f(RH), the hygroscopicity parameter (κ) of bulk aerosols (κ-f(RH)) exhibits a logarithmic increase with increasing RH as long as RH is below 69%, and then stabilizes at 0.32±0.04 and 0.31±0.05 in the dry and wet season, respectively, when RH exceeds 69%. The κ of WSOM (κ-WSOM) was further estimated to be 0.22±0.03 and 0.13±0.04 in the dry and wet seasons, respectively, when RH>69%. WSOM significantly affects κ-f(RH) by retarding the deliquescence process of aerosols and altering the mass ratio of water-soluble inorganic salts (WSIS) to WSOM within the size range of 0.4-0.9 μm, especially under low RH conditions (69%). f(RH) of WSIS and WSOM were then corrected using the revised κ-f(RH) under low RH conditions, which showed 22-31% lower values than those produced by the IMPROVE formulas. © 2023, The Authors. All rights reserved.

关键词： Aerosols

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Arrayed Cobalt Phosphide Electrocatalyst Achieves Low Energy Consumption and Persistent H2 Liberation from Anodic Chemical Conversion

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Nano-Micro Letters 2020年第11期12卷 154-167页

作者： Kai Zhang Gong Zhang Qinghua Ji Jiuhui Qu Huijuan Liu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco‑Environmental SciencesChinese Academy of SciencesBeijing 100085People’s Republic of China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Drinking Water Science and Technology Research Center for Eco‑Environmental SciencesChinese Academy of SciencesBeijing 100085People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Electrochemical reduction of water to hydrogen(H2) offers a promising strategy for production of clean energy,but the design and optimization of electrochemical apparatus present challenges in terms of H2 recovery and energy *** cobalt phosphide nanoarrays(Co2 P/CoP NAs) as a charge mediator,we effectively separated the H2 and O2 evolution of alkaline water electrolysis in time,thereby achieving a membrane-free pathway for H2 *** hierarchical array structure and synergistic optimization of the electronic configuration of metallic Co2 P and metalloid CoP make the Co2 P/CoP NAs high-efficiency bifunctional electrocatalysts for both charge storage and hydrogen *** investigations revealed that the introduction of Co2 P into CoP leads to a moderate hydrogen adsorption free energy and low water dissociation barrier,which are beneficial for boosting HER ***,Co2 P/CoP NAs with high capacitance could maintain a cathodic H2 evolution time of 1500 s at 10 mA cm^(-2) driven by a low average voltage of 1.38 ***,the energy stored in the mediator could be exhausted via coupling with the anodic oxidation of ammonia,whereby only 0.21 V was required to hold the current for 1188 *** membrane-free architecture demonstrates the potential for developing hydrogen purification technology at low cost.

关键词： Electrocatalysis Cobalt phosphide Hydrogen purification Ammonia oxidation reaction Membrane-free architecture

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Inhibition of bromate formation by reduced graphene oxide supported cerium dioxide during ozonation of bromidecontaining water

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Frontiers of environmental Science & Engineering 2019年第6期13卷 81-89页

作者： Bei Ye Zhuo Chen Xinzheng Li Jianan Liu Qianyuan Wu Cheng Yang Hongying Hu Ronghe Wang Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China Key Laboratory of Microorganism Application and Risk Control of Shenzhen Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental SafetyGraduate School at ShenzhenTsinghua UniversityShenzhen 518055China Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control(SMARC)School of EnvironmentTsinghua UniversityBeijing 100084China Division of Energy and Environment Graduate School at ShenzhenTsinghua UniversityShenzhen 518055China

Ozone(O3)is widely used in drinking water disinfection and wastewater ***,when applied to bromide-containing water,ozone induces the formation of bromate,which is *** previous study found±at graphene oxide(GO)can enhance the degradation efficiency of micropollutants during ***,in this study,GO was found to promote bromate formation during ozonation of bromide-containing waters,with bromate yields from the O3/GO process more than twice those obtained using ozone *** promoted bromate formation was attributed to increased hydroxyl radical production,as confirmed by the significant reduction(almost 75%)in bromate yield after adding t-butanol(TBA).Cerium oxide(less tfian 5 mg/L)supported on reduced GO(xCeO2/RGO)significantly inhibited bromate formation during ozonation compared with reduced GO alone,and the optimal Ce atomic percentage(x)was determined to be 0.36%,achieving an inhibition rate of approximately 73%.Fourier transform infrared(FT-IR)spectra indicated the transformation of GO into RGO after hydrothermal treatment,and transmission electron microscope(TEM)results showed that CeO2 nanoparticles were well dispersed on the RGO *** X-ray photoelectron spectroscopy(XPS)spectra results demonstrated that the Ce^3+/Ce^4+ratio in xCeO2/RGO was almost 3-4 times higher than that in pure CeO2,which might be attributed to the charge transfer effect from GO to ***,Ce+on thexCeO2/RGO surface could quench Br-and BrO-to further inhibit bromate ***,0.36CeO2/RGO could also enhance the degradation efficiency of N,N-diethyl-zn-toluamide(DEET)in synthetic and reclaimed water during ozonation.

关键词： Bromate Catalytic ozonation Graphene oxide Cerium dioxide

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Health Impacts of Climate- Resilient Urban Development: Evidence from China

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SSRN 2024年

作者： Fu, Kai-Yang Liu, Yu-Zhe Lu, Xin-Yu Chen, Bin Chen, You-Hua College of Economics and Management South China Agricultural University Guangzhou510642 China School of Environment Beijing Normal University Beijing100875 China Guangdong Center for Rural Policy Studies South China Agricultural University Guangzhou510642 China Research Center for Agricultural Industry Development South China Agricultural University Guangzhou510642 China State Key Joint Laboratory of Environmental Simulation and Pollution Control China

The increasing frequency of extreme weather events due to global warming has significantly impacted the health of people, necessitating adaptive policy measures to mitigate these adverse effects. Thus, this study systematically examines the impacts and mechanisms of Climate-Resilient City (CRC) pilot policies on the health of individuals by using a difference-in-differences methodology. The results indicate that CRC pilot policies significantly enhance the health status of this demographic. Mechanism analyses reveal that CRC pilot policies improve living conditions through a range of climate resilience strategies, including enhanced urban climate resilience planning, improved water cycle management, reduced air pollution, decreased energy consumption, and bolstered social capital. Further heterogeneity analyses demonstrate that CRC pilot policies significantly benefit residents in areas with a high incidence of extreme temperatures and frequent rainy days, while having a limited impact in regions prone to extreme precipitation. Additionally, our findings indicate that CRC pilot policies notably improve health outcomes for vulnerable groups. These findings underscore the critical role of climate-resilient city building in safeguarding the health of middle-aged and elderly individuals and, provide valuable insights for policymakers aiming to develop effective climate and environmental health policies to address regional health disparities. © 2024, The Authors. All rights reserved.

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Unveiling the Confinement and Interface Effect on Low Temperature Degradation of Toluene Over Mesoporous Zeolite Encapsulated Pt-Ceo2 Catalyst

SSRN

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SSRN 2023年

作者： Zhang, Qiuli Yang, Senyou Zhang, Hongxiang He, Tianyao Liu, Wenming Sun, Xiaomin Li, Guobo Yu, Yunbo Peng, Honggen School of Chemistry and Chemical Engineering Nanchang University 999 Xuefu Road Jiangxi Nanchang330031 China School of Resources and Environment Nanchang University 999 Xuefu Road Jiangxi Nanchang330031 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China Environment Research Institute Shandong University Qingdao266237 China State Key Joint Laboratory of Environmental Simulation and Pollution Control China

The low-temperature efficient degradation of volatile organic compounds (VOCs) is imminent due to the serious hazards it poses to the environment and human health. Precious metal-based catalysts have excellent performance, but they are prone to sintering and aggregation at high temperatures, which limits their applications. Therefore, inhibiting the migration aggregation of precious metals during the reaction process can effectively improve the utilization of precious metals and alleviate the deactivation of catalysts. In this study, a novel encapsulated catalyst (Pt-CeO2@meso-S1) containing Pt-CeO2 interfaces was constructed by using mesoporous-rich zeolite as a shell layer and applied to the catalytic oxidation of toluene. The introduction of CeO2 constructed a Pt-CeO2 active interface to promote the low-temperature degradation of toluene, achieving complete oxidation of toluene at 160 ℃. The crystalline phase transition strategy enhanced the specific surface area, which improved the dispersion of platinum and facilitated the construction of the Pt-CeO2 interface. The zeolite shell and mesoporous pores could effectively confine/stabilize the Pt-CeO2 active components and inhibit the sintering of Pt to obtain outstanding water resistance and high-temperature stability. DFT calculations demonstrated that the presence of the Pt-CeO2 active interfaces reduces the oxygen vacancy formation energy and facilitates the activation of gas-phase oxygen. The Mars-van-Krevelen (MvK) mechanism governs the degradation of toluene over Pt-CeO2@meso-S1 was revealed by the in situ DRIFTS. This work provides a good candidate for industrial high-performance catalytic removal of VOCs at low temperatures. © 2023, The Authors. All rights reserved.

关键词： Volatile organic compounds

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Ecosystem Microbiome Science

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mLife 2023年第1期2卷 2-10页

作者： Yong-Guan Zhu Dong Zhu Matthias CRillig Yunfeng Yang Haiyan Chu Qing-Lin Chen Josep Penuelas Hui-Ling Cui Michael Gillings Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamenChina State Key Laboratory of Urban and Regional Ecology Research Centre for Eco-environmental SciencesChinese Academy of SciencesBeijingChina Institute of Biology Freie Universität BerlinBerlinGermany Berlin‐Brandenburg Institute of Advanced Biodiversity Research(BBIB) BerlinGermany State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijingChina State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjingChina Faculty of Veterinary and Agricultural Sciences The University of MelbourneMelbourneVictoriaAustralia CSIC Global Ecology Unit CREAF-CSIC-UABBellaterraCataloniaSpain CREAF Cerdanyola del VallèsCataloniaSpain ARC Centre of Excellence for Synthetic Biology and Department of Biological SciencesMacquarie UniversitySydneyNew South WalesAustralia

The microbiome contributes to multiple ecosystem functions and services through its interactions with a complex environment and other *** date,however,most microbiome studies have been carried out on individual hosts or particular environmental *** greatly limits a comprehensive understanding of the processes and functions performed by the microbiome and its dynamics at an ecosystem *** propose that the theory and tools of ecosystem ecology be used to investigate the connectivity of microorganisms and their interactions with the biotic and abiotic environment within entire ecosystems and to examine their contributions to ecosystem *** of natural and anthropogenic stressors on ecosystems will likely cause cascading effects on the microbiome and lead to unpredictable outcomes,such as outbreaks of emerging infectious diseases or changes in mutualistic *** enormous advances in microbial ecology,we are yet to study microbiomes of ecosystems as a *** so would establish a new framework for microbiome study:Ecosystem Microbiome *** advent and application of molecular and genomic technologies,together with data science and modeling,will accelerate progress in this field.

关键词： dynamics ecosystem global change interactions microbiome

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