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A superior catalyst for ozone decomposition: NiFe layered double hydroxide

Journal of environmental Sciences 2023年第12期134卷 2-10页

作者： Zhisheng Wang Yingfa Chen Xiaotong Li Jinzhu Ma Guangzhi He Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China

Ground-level ozone is harmful to human beings and ecosystems,while room-temperature catalytic decomposition is the most effective technology for ozone ***,solving the deactivation of existing metal oxide catalysts was caused by oxygen-containing intermediates is ***,we successfully prepared a two-dimensional NiFe layered double hydroxide (NiFe-LDH) catalyst via a facile co-precipitation method,which exhibited stable and highly efficient performance of ozone decomposition under harsh operating conditions (high space velocity and humidity).The NiFe-LDH catalyst with Ni/Fe=3and crystallization time over 5 hr (named Ni3Fe-5) exhibited the best catalytic performance,which was well beyond that of most existing manganese-based oxide ***,under relative humidity of 65%and space velocity of 840 L/(g·hr),Ni3Fe-5 showed ozone conversion of 89%and 76%for 40 ppmV of O3within 6 and 168 hr at room-temperature,*** demonstrated that the layered structure of NiFe-LDH played a decisive role in its outstanding catalytic performance in terms of both activity and water *** LDH catalysts fundamentally avoids the deactivation caused by the occupancy of oxygen vacancies by oxygen-containing species (H2O,O-,and O2-) in manganese-based *** study indicated the promising application potential of LDHs than manganese-based oxide catalysts in removal of gaseous ozone.

关键词： Ozone decomposition Confined catalysis Nickel-iron layered double hydroxides Co-precipitation method Two-dimensional materials

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Highly efficient P uptake by Fe3O4 loaded amorphous Zr-La (carbonate) oxides: Electrostatic attraction, inner-sphere complexation and oxygen vacancies acceleration effect

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Journal of environmental Sciences 2022年第10期34卷 18-29页

作者： Chenyang Liu Yili Wang Xiaolin Li Junyi Li Shuoxun Dong Haotian Hao Yao Tong Yanqing Zhou College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Bimetallic oxides composites have received an increasing attention as promising adsorbents for aqueous phosphate (P) removal in recent years. In this study, a novel magnetic composite MZLCO was prepared by hybridizing amorphous Zr-La (carbonate) oxides (ZLCO) with nano-FeOthrough a one-pot solvothermal method for efficient phosphate adsorption. Our optimum sample of MZLCO-45 exhibited a high Langmuir maximum adsorption capacity of 96.16 mg P/g and performed well even at low phosphate concentration. The phosphate adsorption kinetics by MZLCO-45 fitted well with the pseudo-second-order model, and the adsorption capacity could reach 79% of the ultimate value within the first 60 min. The phosphate adsorption process was highly p H-dependent, and MZLCO-45 performed well over a wide p H range of 2.0-8.0. Moreover, MZLCO-45 showed a strong selectivity to phosphate in the presence of competing ions (Cl^(-), NO_(3)^(-), SO_(4)^(2-), HCO_(3)^(-), Ca^(2+), and Mg^(2+)) and a good reusability using the eluent of Na OH/Na Cl mixture, then 64% adsorption capacity remained after ten recycles. The initial 2.0 mg P/L in municipal wastewater and surface water could be efficiently reduced to below 0.1mg P/L by 0.07 g/L MZLCO-45, and the phosphate removal efficiencies were 95.7% and 96.21%, respectively. Phosphate adsorption mechanisms by MZLCO-45 could be attributed to electrostatic attraction and the inner-sphere complexation via ligand exchange forming Zr/La-O-P, -OH and CO_(3)^(2-)groups on MZLCO-45 surface played important roles in the ligand exchange process. The existence of oxygen vacancies could accelerate the phosphate absorption rate of the MZLCO-45 composites.

关键词： Fe3O4 loaded amorphous Zr-La(carbonate)oxides Phosphate adsorption performance Regeneration Mechanism Real water treatment

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Significant effects of transport on nanoparticles during new particle formation events in the atmosphere of Beijing

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Particuology 2023年第9期80卷 1-10页

作者： Dongjie Shang Min Hu Lizi Tang Xin Fang Ying Liu Yusheng Wu Zhuofei Du Xuhui Cai Zhijun Wu Shengrong Lou Mattias Hallquist Song Guo Yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringInternational JointLaboratory for Regional Pollution ControlMinistry of Education(IJRC)Peking UniversityBeijing100871China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science&TechnologyNanjing210044China Department of Chemistry and Molecular Biology University of GothenburgGothenburg41296Sweden Shanghai Academy of Environmental Sciences Shanghai200233China

The mechanisms of new particle formation(NPF)events that occurred under high aerosol loadings(“polluted”NPF)in the atmosphere have been unclear,which has inhibited the precision of particlepollution *** deepen the understanding of how the“polluted”NPF events occur,a one-monthcomprehensive measurement was conducted in the atmosphere of Beijing during the summer ***“clean”NPF events(frequency=22%)(condensation sink,CS<0.015 s^(-1))were found to becaused by local nucleation and ***“polluted”NPF events(frequency=28%)(CS>0.015 s^(-1))were influenced by both local nucleation-growth and regional transport,and the contributions from thetwo factors to 6e25 nm particle number concentration were 60%and 40%,*** studyemphasized the importance of the transport for nanoparticles in relatively polluted atmospheres,and forthat the regional joint particle pollution control would be an essential policy.

关键词： New particle formation Transport Nanoparticles Sulfuric acid

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Significant changes in the physicochemical properties of BC-containing particles during the cold season in Beijing

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Journal of environmental Sciences 2025年第5期151卷 667-676页

作者： Shuya Hu Linghan Zeng Gang Zhao Shiyi Chen Chunsheng Zhao Weilun Zhao Min Hu State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Research Center for Atmospheric Research(IJRC)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and TechnologyNanjing 210044China

The ambient air quality has improved significantly under strict emission controls in Beijing,China over the last *** carbon(BC),as a short-lived climate forcer in ambient aerosols,profoundly impacts the air quality and *** studies have demonstrated a decline in the mass concentration of *** this study,we characterized the chemical compositions and size distributions of BC-containing particles during the cold season of 2022 in Beijing using state-of-the-art instruments capable of exclusively measuring BCcontaining *** optical properties of BC-containing particles were further calculated based on the Mie ***,we compared the properties of BC-containing particles in 2022 with the results of previous *** results showed that the diameters of BC cores became larger while the coating thickness of BC-containing particles became thinner in *** the coating materials,the mass fraction of nitrate increased obviously,and even replaced organic matter as the dominant component during the peak of the pollution *** in chemical compositions and size distributions resulted in lower mass absorption cross-sections(MAC)of BC-containing particles from 10.5±1.1 m^(2)/g in 2016 to 7.3±0.8 m^(2)/g in 2022,reduced by 30.5%.Our results demonstrate the synergistic benefits of air pollution control in improving air quality and mitigating climate ***,the MAC of BC adopted in climate models should vary with the changing air pollution *** study emphasizes that it is imperative to conduct long-term observations of BC-containing particles to better estimate BC’s climate effects.

关键词： Black carbon Chemical composition Size distribution Light absorption ability

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Constructing a Raman and surface-enhanced Raman scattering spectral reference library for fine-particle analysis

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Journal of environmental Sciences 2022年第8期34卷 1-13页

作者： Hui Chen Fengkui Duan Kebin He Jingjing Du Zhenli Sun Suhua Wang Key Laboratory of Resources and Environmental System Optimization of Ministry of Education College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000 China

Fine particles associated with haze pollution threaten the health of over 400 million people in China. Owing to excellent non-destructive fingerprint recognition characteristics, Raman and surface-enhanced Raman scattering(SERS) are often used to analyze the composition of fine particles to determine their physical and chemical properties as well as reaction mechanisms. However, there is no comprehensive Raman spectral library of fine particles. Furthermore, various studies that used SERS for fine-particle composition analysis showed that the uniqueness of the SERS substrates and different excitation wavelengths can produce a different spectrum for the same fine-particle component. To overcome this limitation, we conducted SERS experiments with a portable Raman spectrometer using two common SERS substrates(silver(Ag) foil and gold nanoparticles(Au NPs)) and a 785 nm laser. Herein, we introduced three main particle component types(sulfate-nitrate-ammonium(SNA), organic material, and soot) with a total of 39 chemical substances. We scanned the solid Raman, liquid Raman, and SERS spectra of these substances and constructed a fine-particle reference library containing 105 spectra. Spectral results indicated that for soot and SNA, the differences in characteristic peaks mainly originated from the solid-liquid phase transition;Ag foil had little effect on this difference, while the Au NPs caused a significant red shift in the peak positions of polycyclic aromatic hydrocarbons. Moreover, with various characteristic peak positions in the three types of spectra, we could quickly and correctly distinguish substances. We hope that this spectral library will aid in the future identification of fine particles.

关键词： Raman Surface-enhanced Raman scattering(SERS) Spectral library Fine-particle

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Collaborative Management of Water-Food-Energy Nexus Under Multiple Uncertainty 15th

Collaborative Management of Water-Food-Energy Nexus Under Mu...

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15th International Conference on environmental Science and Development, ICESD 2024

作者： Zhou, Yanxiao Li, Yongping Huang, Guohe Li, Yanfeng State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing China Institute for Energy Environment and Sustainable Communities University of Regina ReginaSask Canada

ISBN: (纸本)9783031886829

Water shortage and food security have posed significant challenges to the sustainable management of water-food-energy (WFE) nexus. In this study, a fixed-mix joint-probabilistic constraints programming (FJCP) approach is developed for obtaining the sustainable WFE strategies. Then, a FJCP-WFE model is formulated with considering 36 scenarios. Results reveal that (i) system benefit and total water allocation would increase with the rising α as well as decreasing p levels, and decision makers can obtain the compromise among system violation risk, economic benefit and water consumption by varying p and α levels;(ii) the changing α level would influence water allocation structure, where the proportion of agricultural water would decrease by 4.9% from α = 0.47 to α = 0;(iii) the system benefit and total water allocation of FJCP would be lower than those of FCCP, with reductions of 0.001–0.04% and 1.92–5.32%, respectively. Results indicate that FJCP method is suitable for arid areas, which can find more practical alternatives for the WFE nexus system management, and promote regional sustainable development. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Risk perception

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Selective capture of Tl2O from flue gas with formation of p-n junction on V_(2)O_(5)-WO_(3)/TiO_(2)catalyst under working conditions

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Green Energy & environment 2023年第1期8卷 4-9页

作者： Jianjun Chen Rongqiang Yin Gongda Chen Junyu Lang Xiaoping Chen Xuefeng Chu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijingChina School of Physical Science and Technology Shanghai Tech UniversityShanghaiChina Key Laboratory of Architectural Cold Climate Energy Management Ministry of EducationJilin Jianzhu UniversityChangchunChina Guangdong Energy Group Science and Technology Research Institute Co. Ltd.GuangdongChina

Thallium(Tl)compounds,highly toxic to biology,are usually released into flue gas during fossil/minerals combustion,and further distributed in water and *** this work,we fundamentally investigated the capture of gaseous Tl_(2)O by industrial V2O5-WO3/TiO_(2)catalyst under working condition in Tl-containing flue *** and theoretical results indicated that the Tl_(2)O has significant electron-feeding capacity and easily donate electron to unoccupied orbitals of TiO_(2),leading to dismutation of Ti 2p and inartificial formation of p-n junction on TiO_(2)surface,which prompted Tl_(2)O selectively interacted with TiO_(2)in flue ***,we proposed and verified an effective way to capture gaseous Tl_(2)O,which offered almost the best choice to eliminate Tl emission from flue gas and expanded the function of the TiO_(2)-based *** formation of p-n junction on commercial V2O5-WO3/TiO_(2)catalyst under working condition was revealed for the first time,which can be a valuable reference for both heterocatalysis and electro/photocatalysis.

关键词： Tl Catalyst SCR Capture p-n junction

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Transport, transformation, and ecological impacts of brominated flame retardants in soils: A comprehensive review

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environmental Chemistry and Ecotoxicology 2025年 7卷 1142-1157页

作者： Zhang, Jia Li, Dan Yuan, Ying Hui, Kunlong Tan, Wenbing State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China

Brominated flame retardants (BFRs) have become significant contaminants of emerging concern (CECs), resulting in detrimental effects on soil health, human health, and ecosystem sustainability. Their environmental impacts have spurred extensive research into environmental chemistry and ecotoxicology. Despite the widespread detection of both BFRs and Novel Brominated Flame Retardants (NBFRs) in soils, there are few assessments of the environmental behavior and fate of the BFRs. Therefore, this review comprehensively identifies the sources, distribution, transport, transformation, ecotoxicological effects, and remediation strategies of BFRs in soils. Principal findings indicate that adsorption-desorption, mostly influenced by soil organic matter, controls the mobility and transformation of BFRs. Photolysis dominates surface soils, while aerobic and anaerobic biodegradation predominate in subsurface layers. The main factors influencing the bioavailability of BFRs are shed light on in this review. These factors such as the physicochemical properties of BFRs, soil characteristics, and combined pollution are specifically discussed. Moreover, the development, physiological, and biochemical responses of soil organisms to exposure to the BFRs are summarized. Single strategies for addressing BFRs have certain limitations. Urgent actions are needed to focus on environmental behavior and remediation strategies under the "One Health" framework to enrich research gap areas of BFRs, NBFRs, and transformation products. © 2024

关键词： Soil pollution

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Real-Time Black Carbon Emissions from Light-Duty Passenger Vehicles Using a Portable Emissions Measurement System

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Engineering 2022年第9期16卷 73-81页

作者： Xuan Zheng Liqiang He Xiaoyi He Shaojun Zhang Yihuan Cao Jiming Hao Ye Wu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China Center for Sustainable Systems School for Environment and SustainabilityUniversity of MichiganAnn ArborMI 48109-1041USA State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

Black carbon(BC)is considered the second largest anthropogenic climate forcer,but the radiative effects of BC are highly correlated with its combustion ***-road vehicles are an important source of anthropogenic ***,there are major uncertainties in the estimates of the BC emissions from on-road light-duty passenger vehicles(LDPVs),and results obtained with the portable emissions measurement system(PEMS)method are particularly *** developed a PEMS platform and evaluated the on-road BC emissions from ten in-use *** demonstrated that the BC emission factors(EFs)of gasoline direction injection(GDI)engine vehicles range from 1.10 to 1.56 ***^(-1),which are higher than the EFs of port fuel injection(PFI)engine vehicles(0.10–0.17 ***^(-1))by a factor of *** BC emissions during the cold-start phase contributed 2%–33%to the total emissions.A strong correlation(R^(2)=0.70)was observed between the relative BC EFs and average vehicle speed,indicating that traffic congestion alleviation could effectively mitigate BC ***,BC and particle number(PN)emissions were linearly correlated(R^(2)=0.90),and compared to PFI engine vehicles,the instantaneous PN-to-BC emission rates of GDI engine vehicles were less sensitive to vehicle specific power-to-velocity(VSPV)increase in all speed ranges.

关键词： Black carbon Light-duty gasoline vehicles Portable emissions measurement system Real-time emissions

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Chemodiversity of Fulvic Acid as Affected by Different Biowastes Materials During Composting: An Analysis by Ultraviolet–Visible Spectroscopy 14th

Chemodiversity of Fulvic Acid as Affected by Different Biowa...

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14th International Conference on environmental Science and Development, ICESD 2023

作者： Sun, Qingyu Cui, Yini Gao, Yiman Tan, Wenbing Xingtai Eco-Environmental Monitoring Center of Hebei Province Xingtai054000 China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China

ISBN: (纸本)9783031560552

To explore the effect of UV–Vis spectra of different compost materials, this paper adopted nine other research materials on spectral characteristics of composting fulvic acid (FA). The results showed that the UV–Vis unit molar absorption strength increased in each compost, particularly stem waste, leaf waste, and cabbage waste, implying that the aromatization and unsaturated degree of FA increased, as did the humification of compost. Correlation analysis showed that germination index (GI) was positively correlated with E250/E365, significantly positively correlated with SUVA254 and S275–295, SR, and strongly negatively correlated with E253/E203, respectively. Therefore, E253/E203, SUVA254, S275–295, and E250/E365 could be used to evaluate compost maturity. Furthermore, all compost could be regarded as an indicator of reaching maturation when SUVA254 is higher than 0.21 mg/L. The change of maturity parameters indicated that E465/E665 of leaf waste, cabbage waste, stem waste, and municipal solid waste declined during composting, SUVA254, A240–400, S275–295, A3/A2 of kitchen waste, chicken manure, pig manure, and peat increased during composting. To summarize, the organic matter molecular weight, compost stability, and degree of humification significantly increased. Compost was classified into three groups based on hierarchical cluster analysis: cabbage waste, stem waste, and peat were in the first group;kitchen waste and leaf waste were in the second group;and pig manure, chicken manure, municipal solid waste, and grass waste were in the third group. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Municipal solid waste

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