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Enhancing ozone catalytic decomposition through acid treatment ofα-MnO_(2) for improved activity and humidity resistance

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Journal of environmental Sciences 2025年第3期149卷 35-45页

作者： Shangchao Xiong Kai Zhang Zhenghao Xu Hongjun Ou Yuanyuan Zheng Xi Li Yue Peng Xubiao Luo Junhua Li School of Life Sciences Jinggangshan UniversityJi’an 343009China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Post-etching method using dilute acid solutions is an effective technology to modulate the surface compositions of metal-oxide *** theα-MnO_(2) catalyst treated with 0.1.mol/L nitric acid exhibits higher ozone decomposition activity at high relative humidity than the counterpart treated with acetic *** the increases in surface area and lattice dislocation,the improved activity can be due to relatively higher Mn valence on the surface and newly-formed Brønsted acid sites adjacent to oxygen *** remnant nitro species deposited on the catalyst by nitric acid treatment is ideal hydrophobic groups at ambient *** decomposition route is also proposed based on the DRIFTS and DFT calculations:ozone is facile to adsorb on the oxygen vacancy,and the protonic H of Brønsted acid sites bonds to the terminal oxygen of ozone to accelerate its cleavage to O_(2),reducing the reaction energy barrier of O_(2) desorption.

关键词： Ozone decomposition α-MnO_(2) Brønsted acid sites H-bonds Post-etching

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Review on corrosion and corrosion scale formation upon unlined cast iron pipes in drinking water distribution systems

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Journal of environmental Sciences 2022年第7期34卷 173-189页

作者： Haiya Zhang Dibo Liu Lvtong Zhao Jun Wang Shuguang Xie Shuming Liu Pengfei Lin Xiaojian Zhang Chao Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

The qualified finished water from water treatment plants(WTPs) may become discolored and deteriorated during transportation in drinking water distribution systems(DWDSs), which affected tap water quality seriously. This water stability problem often occurs due to pipe corrosion and the destabilization of corrosion scales. This paper provides a comprehensive review of pipe corrosion in DWDSs, including corrosion process, corrosion scale formation, influencing factors and monitoring technologies utilized in DWDSs. In terms of corrosion process, corrosion occurrence, development mechanisms, currently applied assays, and indices used to determine the corrosion possibility are summarized, as well as the chemical and bacterial influences. In terms of scale formation, explanations for the nature of corrosion and scale formation mechanisms are discussed and its typical multilayered structure is illustrated. Furthermore, the influences of water quality and microbial activity on scale transformation are comprehensively discussed. Corrosion-related bacteria at the genus level and their associated corrosion mechanism are also summarized. This review helps deepen the current understanding of pipe corrosion and scale formation in DWDSs, providing guidance for water supply utilities to ensure effective measures to maintain water quality stability and guarantee drinking water safety.

关键词： Corrosion Scale formation Water quality stability Drinking water distribution system Iron pipe Water supply safety

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Novel quantitative structure activity relationship models for predicting hexadecane/air partition coefficients of organic compounds

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Journal of environmental Sciences 2023年第2期124卷 98-104页

作者： Ya Wang Weihao Tang Zijun Xiao Wenhao Yang Yue Peng Jingwen Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyLinggong Road 2Dalian 116024China

Predicting the logarithm of hexadecane/air partition coefficient(L)for organic compounds is crucial for understanding the environmental behavior and fate of organic compounds and developing prediction models with polyparameter linear free energy ***,two quantitative structure activity relationship(QSAR)models were developed with 1.72 L values for the organic compounds by using multiple linear regression(MLR)and support vector machine(SVM)*** the basis of the OECD principles,the goodness of fit,robustness and predictive ability for the developed models were *** SVM model was first developed,and the predictive capability for the SVM model is slightly better than that for the MLR *** applicability domain(AD)of these two models has been extended to include more kinds of emerging pollutants,i.e.,oraganosilicon *** developed QSAR models can be used for predicting L values of various organic *** van derWaals interactions between the organic compound and the hexadecane have a significant effect on the L value of the *** in silico models developed in current study can provide an alternative to experimental method for high-throughput obtaining L values of organic compounds.

关键词： L value Quantitative structure-activity relationship Multiple linear regression Support vector machine Oraganosilicon compounds

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Superhydrophobic ceramic membrane coupled with a biphasic solvent for efficient CO_(2)capture

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Green Energy & Environment 2025年第4期10卷 834-844页

作者： Kaili Xue Zhen Chen Xiaona Wu Heng Zhang Haiping Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing102206China

An innovative strategy was proposed by integration of membrane contactor(MC)with biphasic solvent for efficient CO_(2) capture from flue *** accessible fly ash-based ceramic membrane(CM)underwent hydrophobic modification through silane grafting,followed by fluoroalkylsilane decoration,to prepare the superhydrophobic membrane(CSCM).The CSCM significantly improved resistance to wetting by the biphasic solvent,consisting of amine(DETA)and sulfolane(TMS).Morphological characterizations and chemical analysis revealed the notable enhancements in pore structure and hydrophobic chemical groups for the modified *** of wetting/bubbling behavior based on static wetting theory referred the liquid entry pressure(LEP)of CSCM increased by 20 kPa compared to pristine *** with traditional amine solvents,the biphasic solvent presented the expected phase *** experiments demonstrated that the CO_(2) capture efficiency of the biphasic solvent increased by 7%,and the electrical energy required for desorption decreased by 32%.The 60-h continuous testing and supplemental characterization of used membrane confirmed the excellent adaptability and durability of the *** study provides a potential approach for accessing hydrophobic ceramic membranes and biphasic solvents for industrial CO_(2) capture.

关键词： Carbon capture Membrane contactor Hydrophobic modification Membrane wetting Biphasic solvent

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Variability of fuel consumption and CO_(2) emissions of a gasoline passenger car under multiple in-laboratory and on-road testing conditions

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Journal of environmental Sciences 2023年第3期125卷 266-276页

作者： Boya Zhou Liqiang He Shijian Zhang Rui Wang Luowei Zhang Mengliang Li Yu Liu Shaojun Zhang Ye Wu Jiming Hao China Automotive Technology and Research Center Co. Ltd.Tianjin 300300China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Beijing Laboratory of Environmental Frontier Technologies School of EnvironmentTsinghua UniversityBeijing 100084China

An increasing divergence regarding fuel consumption(and/or CO_(2)emissions) between realworld and type-approval values for light-duty gasoline vehicles(LDGVs) has posed severe challenges to mitigating greenhouse gases(GHGs) and achieving carbon emissions peak and neutrality. To address this divergence issue, laboratory test cycles with more real-featured and transient traffic patterns have been developed recently, for example, the China Lightduty Vehicle Test Cycle for Passenger cars(CLTC-P). We collected fuel consumption and CO_(2)emissions data of a LDGV under various conditions based on laboratory chassis dynamometer and on-road tests. laboratory results showed that both standard test cycles and setting methods of road load affected fuel consumption slightly, with variations of less than 4%. Compared to the type-approval value, laboratory and on-road fuel consumption of the tested LDGV over the CLTC-P increased by 9% and 34% under the reference condition(i.e., air conditioning off, automatic stop and start(STT) on and two passengers). On-road measurement results indicated that fuel consumption under the low-speed phase of the CLTC-P increased by 1.% due to the STT off, although only a 4% increase on average over the entire cycle. More fuel consumption increases(52%) were attributed to air conditioning usage and full passenger capacity. Strong correlations(R2> 0.9) between relative fuel consumption and average speed were also identified. Under traffic congestion(average speed below 25 km/hr), fuel consumption was highly sensitive to changes in vehicle speed. Thus,we suggest that real-world driving conditions cannot be ignored when evaluating the fuel economy and GHGs reduction of LDGVs.

关键词： Fuel consumption CO_(2)emissions Light-duty gasoline vehicle(LDGV) Real driving

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Enhancing corn stalk-based anaerobic digestion with different types of zero-valent iron added during the acidification stage:Performance and mechanism

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Journal of environmental Sciences 2024年第11期145卷 64-74页

作者： Xiang Liu Yue Liu Min Wang Qianzhen Deng Hao Yang College of Agricultural Science and Engineering Hohai UniversityNanjing 210098China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Wenzhou UniversityWenzhou 325035China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu UniversityHefei 230009China

Anaerobic digestion has been defined as a competitive approach to facilitate the recycling of corn ***,few studies have focused on the role of direct interspecies electron transfer(DIET)pathway in the acidification stage under the addition of different particle sizes of zero-valent iron(ZVI).In this study,three types of ZVI,namely iron filings,iron powder and nanoscale iron,were investigated,respectively,to enhance its high-value *** in volatile fatty acids(VFAs)and methane(CH4)production associated with the underlyingmechanisms were emphatically *** indicated that the addition of ZVI could increase the concentration of VFAs,with the most outstanding performance observed with the use of nanoscale ***,the conversion of propionic acid to acetic acid was driven by adding ZVI with no between-group differences in acidizing ***,the substrate was more fully utilized when supplied with iron powder compared with other groups in methanogenic phase,thereby displaying the maximumCH4 yield with a value of 263.1.mL/(g total solids(TS)).However,adding nanoscale iron could signally shorten the digestion time(T80),saving 7 days in comparison to the group of iron powder.

关键词： Zero-valent iron Corn stalk Anaerobic digestion Volatile fatty acids Methane

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A review and evaluation of nonroad diesel mobile machinery emission control in China

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Journal of environmental Sciences 2023年第1期123卷 30-40页

作者： Pengju Bie Liang Ji Huanxing Cui Gang Li Shunli Liu Ying Yuan Kebin He Huan Liu State Key Joint Laboratory of ESPC State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexSchool of EnvironmentInternational Joint Laboratory on Low Carbon Clean Energy InnovationTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental SciencesBeijing 100012China Jinan Automobile Testing Center Co Ltd.Jinan 250102China

China’s emission control for nonroad diesel mobile machinery(NDMM)must deal with a fast increase in stock as well as regulations that are two decades behind those for on-road *** study provides the first large-scale review and evaluation of China’s NDMM policies,along with emission measurements and an investigation on diesel fuel *** sulfur contents of the investigated diesel declined from 430 ppm(median value)in 201. to6-8 ppm during the 201.-201. *** emission control of NO_(x)and PM greatly improved with the shift from the China II to China IV standards,as demonstrated by engine tests and field NO_(x)***,the NO_(x)emission factors for non-type-approved engines were approximately twice the limits of the China II *** compliance based on bench tests was not sufficient to control actual emissions because the field-measured NO_(x)emission factors of all machinery ranged from 24%to 225%greater than the respective emission limits for the *** circumstances adversely affected the effectiveness of the regulations and policies for China’s emission control of ***,the policies on new and in-use NDMM,as well as diesel fuel quality,prevented NO_(x)and PM emissions amounting to 4.4 Tg and 297.8 Gg during the period 2008-201.,*** emission management strategy contributed to enhancing the international competitiveness of China’s NDMM industries by promoting advanced *** effective NDMM emission control in the future,portable testing and noncontact remote supervision should be strengthened;also,the issue of noncompliant diesel should be addressed through rigorous control measures and financial penalties.

关键词： Nonroad mobile machinery Emission reduction Emission control policy Emission factor Diesel fuel quality

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Manipulated microtopography alters plant community development in fragile farm-pastoral transition zone

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Journal of Plant Ecology 2024年第5期17卷 176-188页

作者： Minxuan Gao Yining Wang Yongning Ren Jinyan Zhan Tian Xie School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Normal UniversityBeijing 100875China Yellow River Estuary Wetland Ecosystem Observation and Research Station Ministry of EducationDongying 257500China

The ecosystems within agro-pastoral transition zones exhibit inherent fragility and heightened susceptibility to climate variability,exacerbated by profound degradation resulting from anthropogenic *** vegetation degradation in these areas precipitates severe soil erosion,presenting formidable challenges for ecological restoration *** utilization of microtopographic structures to mitigate soil erosion and facilitate vegetation recovery stands as a prominent strategy for vegetation restoration within agro-pastoral transition *** the acknowledgment in current restoration practices that the efficacy of microtopography-based restoration is contingent upon slope,aspect and elevation,there remains a notable absence of precise observed information on this *** study,conducted in the Bashang Grassland,a typical agro-pastoral transition zone in northern China,aims to fill the information gap concerning the correspondence between microtopographic structures and restoration *** findings revealed that microtopography has a significant impact on vegetation characteristics,with outcomes varying by *** slopes displayed higher biomass and density compared with sunny slopes and *** microtopography affected community structure,it did not substantially alter species richness,highlighting the critical role of location and pit construction in successful restoration *** study provides insights for the selection,design and assessment of microtopography-based restoration in vulnerable ecosystems.

关键词： community structure microtopography-based restoration plant diversity plant restoration soil erosion

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Single-atom iron on semi-hollow carbon synthesized by chemical waste-vapor assistance: A superior catalyst for polychlorinated biphenyls degradation

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Nano Research 2025年第2期18卷 164-172页

作者： Bingqing Wang Xu Han Jiaqiang Sun Zhichao Yun Yonghai Jiang State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing 100012China Department of Chemistry National University of SingaporeSingapore 117543Singapore Anhui Basic Discipline Research Center for Clean Energy and Catalysis College of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China

Single-atom site catalysts(SACs)with high atom utilization efficiencies exhibit unexpected properties,making them ideal candidate catalysts for numerous ***,we report a chemical-waste-vapor-assisted(CWVA)strategy for the synthesis of a catalyst with single atom Fe on semi-hollow N-doped carbon(SA-Fe/SHNC).Benefitting from its atomic Fe sites,the prepared catalyst exhibited a 1.3-fold higher activity(0.827 vs.0.008mol_(PCB-209)·mol_(M)^(-1.·h^(-1.)and much longer time-stability(more than 50 vs.0.5 h)than benchmarked Fe_(3)0_(4) nanoparticles toward decachlorobiphenyl(PCB-209)*** and density functional theory calculations revealed that the highly active isolated Fe sites are responsible for the activity of Fe-SAC/*** addition,the CWVA method was shown to be applicable for synthesizing other single atoms on various structured supports,thereby providing new opportunities for the design of various structured SACs for different applications.

关键词： single-atomic site catalyst chemical-waste-vapor Fe-N-C hollow structure polychlorinated biphenyls(PCBs)

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Quantifying China's iron and steel industry's CO_(2) emissions and environmental health burdens:A pathway to sustainable transformation

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environmental Science and Ecotechnology 2024年第4期20卷 189-197页

作者： Weiling Wu Qian Tang Wenbo Xue Xurong Shi Dadi Zhao Zeyuan Liu Xin Liu Chunlai Jiang Gang Yan Jinnan Wang State Environmental Protection Key Laboratory of Environmental Pollution and Greenhouse Gases Co-control Chinese Academy of Environmental PlanningBeijing100041China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100041China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing100041China College of Environmental&Resource Sciences Zhejiang UniversityHangzhou310058China

Assessing the iron and steel industry's(ISI)impact on climate change and environmental health is vital,particularly in China,where this sector significantly influences air quality and CO_(2)*** is a lack of comprehensive analyses that consider the environmental and health burdens of manufacturing processes for ISI ***,we present an integrated emission inventory that encompasses air pollutants and CO_(2)emissions from 81. ISI enterprises and five key manufacturing processes in *** analysis shows that sintering is the primary source of air pollution in the *** contributes 71.of SO_(2),73%of NO_(x),and 54%of PM_(2.5)*** the other hand,81.of total CO_(2)emissions come from blast ***,the contributions of ISI have resulted in an increase of 3.6 mg m^(-3)in national population-weighted PM_(2.5)concentration,causing approximately 59,035 premature deaths in *** from Hebei,Jiangsu,Shandong,Shanxi,and Inner Mongolia provinces contributed to 48%of PM_(2.5)-related deaths in ***,the transportation of air pollutants across provincial borders highlights a concerning trend of environmental health *** on the research findings,it is crucial for ISI manufacturers to prioritize the removal of outdated production capacities and adopt energy-efficient and advanced techniques,along with ultra-low emission *** is particularly important for those manufacturers with substantial environmental *** transformative actions are essential in mitigating the environmental and health impacts in the affected regions.

关键词： Iron and steel industry CO_(2)emissions Air pollutants emissions environmental health

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