ACS ES&T Air最新文献_第5页

Atmospheric Organic Aerosol Age Distribution over Europe during a Period with Intense Wildfires 强烈野火期间欧洲大气有机气溶胶年龄分布

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-10 DOI: 10.1021/acsestair.6c00040

Ksakousti Skyllakou, Petro Uruci, Spyros Pandis

{"title":"Atmospheric Organic Aerosol Age Distribution over Europe during a Period with Intense Wildfires","authors":"Ksakousti Skyllakou, Petro Uruci, Spyros Pandis","doi":"10.1021/acsestair.6c00040","DOIUrl":"https://doi.org/10.1021/acsestair.6c00040","url":null,"abstract":"The age of particulate matter (PM), focusing on organicaerosols,was estimated during a summer period with severe wildfires in Europe,combining a chemical transport model (CTM) with a computationallyefficient source apportionment algorithm. The organic components ofPM were highly aged, especially when they originated from wildfires.The average age of organic aerosol (OA) at the ground level aboveEurope was 58 h, while the average age of biomass burning organicaerosol (bbOA) was 86 h, and that of non-bbOA was 49 h. The averageage of OA was different for OA species with different volatilities.As the volatility of the OA components decreased, their average ageincreased. The average age of the semivolatile biomass burning secondaryOA was 66 h, while that of low volatility biomass burning secondaryOA was 95 h. These results suggest that the OA to which the populationof Europe is exposed is quite different due to aging physical andchemical processes from the particles emitted by its various sources.The average age of OA was found to decrease when the OH levels increasedand vice versa. A reduction of the aging rate by an order of magnituderesulted in a 45% increase in the average age of anthropogenic secondaryOA. On the other hand, 10 times faster aging reactions resulted ina 20% decrease in the average age of anthropogenic secondary organicaerosol. These changes resulted in minor changes in the average ageof the primary organic aerosol.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2225–2235"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient Production of Hydroperoxymethyl Thioformate in the Nitrate Radical Oxidation of Dimethyl Sulfide 二甲基硫化物硝酸盐自由基氧化高效生产氢过氧甲基硫代甲酸酯

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-31 DOI: 10.1021/acsestair.6c00222

Shannon A. Brown, Christopher M. Jernigan, Steven S. Brown, Joel A. Thornton, Timothy H. Bertram

{"title":"Efficient Production of Hydroperoxymethyl Thioformate in the Nitrate Radical Oxidation of Dimethyl Sulfide","authors":"Shannon A. Brown, Christopher M. Jernigan, Steven S. Brown, Joel A. Thornton, Timothy H. Bertram","doi":"10.1021/acsestair.6c00222","DOIUrl":"https://doi.org/10.1021/acsestair.6c00222","url":null,"abstract":"The oxidation of dimethyl sulfide (DMS), emitted fromthe surfaceocean, contributes to aerosol particle formation and growth in themarine atmosphere. DMS is primarily oxidized by the hydroxyl radical(•OH), leading to the formation of stable intermediates suchas hydroperoxymethyl thioformate (HPMTF). The subsequent gas-phaseand multiphase chemistry of these intermediates dictate the productionrates of sulfuric acid, methanesulfonic acid, and sulfate aerosol.At night, DMS is oxidized by the nitrate radical (NO3•),where nitric acid and the methylthiomethyl peroxy radical (MTMP) areformed following H-abstraction from DMS. The subsequent fate of theMTMP at night is not known. Here, we use measurements in an environmentalchamber to investigate the nocturnal chemistry of DMS. We show thatunder typical atmospheric conditions, HPMTF is formed in unit yieldin the NO3•-oxidation of DMS and that the chemicallifetime of HMPTF with respect to oxidation by NO3•is much longer than the length of night. Our results highlight thatHPMTF is formed in high yield in the nocturnal marine boundary layerand is likely to accumulate at night due to the slow subsequent oxidationby NO3•.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2437–2446"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extracting Bacteria for Filter Forensics 用于过滤取证的细菌提取

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-18 DOI: 10.1021/acsestair.6c00176

Nehul Agarwal, Jeffrey A. Siegel, Sarah R. Haines

{"title":"Extracting Bacteria for Filter Forensics","authors":"Nehul Agarwal, Jeffrey A. Siegel, Sarah R. Haines","doi":"10.1021/acsestair.6c00176","DOIUrl":"https://doi.org/10.1021/acsestair.6c00176","url":null,"abstract":"Quantifyingmicrobial concentration in HVAC or air cleaner filterdust is one useful method for characterizing indoor bioaerosols, however,the quantification depends on the effectiveness of the dust extractionmethod. This study investigates dry swabbing as an alternate dustextraction approach when compared with traditional methods such asvacuuming. Dust samples from 12 HVAC filters taken from two air handlersserving occupied and unoccupied office spaces in the same buildingwere collected via dry swabbing and vacuuming, and total bacterialconcentrations were quantified. The results suggest that multipleswab samples from a single filter may be required to capture the representativenessof total bacteria on the filter. Swabbing is more sensitive to localbacteria and inhibitors when compared to vacuuming and yields higherbacterial concentration in high dust loading conditions. Three toten times higher bacterial concentrations were observed on filtersfrom the occupied floor; however, swabbing displayed high uncertaintiesand variation in these results. The findings suggest that dry swabbingcan be used for rapid screening of contaminants, especially in areaswith low dust amounts or where vacuuming is not feasible. Furtherwork should aim to resolve within-filter variation and associateduncertainties as well as extend this approach to characterize themicrobial communities.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2387–2395"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Hybrid Transfer Learning Approach for Ambient PM2.5 Exposure Modeling in LMIC Contexts: A Case Study from Lima, Peru LMIC环境PM2.5暴露建模的混合迁移学习方法：秘鲁利马的案例研究

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-18 DOI: 10.1021/acsestair.6c00125

Qiang Pu, Qingyang Zhu, Elvis Medina, Alan Llacza, Bryan Vu, Jianzhao Bi, Kenan Li, Laura Nicolaou, William Checkley, Stella Hartinger, Kyle Steenland, Yang Liu

{"title":"A Hybrid Transfer Learning Approach for Ambient PM2.5 Exposure Modeling in LMIC Contexts: A Case Study from Lima, Peru","authors":"Qiang Pu, Qingyang Zhu, Elvis Medina, Alan Llacza, Bryan Vu, Jianzhao Bi, Kenan Li, Laura Nicolaou, William Checkley, Stella Hartinger, Kyle Steenland, Yang Liu","doi":"10.1021/acsestair.6c00125","DOIUrl":"https://doi.org/10.1021/acsestair.6c00125","url":null,"abstract":"Exposure to fine particulate matter (PM2.5) contributesto millions of premature deaths annually worldwide. While epidemiologicalstudies increasingly rely on geospatial technologies, such as satelliteremote sensing, low-cost sensors, and chemical transport models, toquantify air pollution exposure, sparse monitoring in many low- andmiddle-income countries often introduces sampling bias, potentiallyskewing exposure estimates. We developed a hybrid and transfer learningapproach in Lima, Peru, that integrates multiple geospatial technologiesand machine learning to mitigate sampling bias and improve PM2.5 predictions. Our approach incorporated ground PM2.5 observations from reference-grade and low-cost monitors, satellite-retrievedaerosol optical depth, simulations from Weather Research and Forecastingmodel coupled with Chemistry, and additional pollution-related variables.We accounted for the sampling bias using a geo-envrionmental similarity-basedtransfer learning, leveraging training data from data-rich regions(the United States) to inform the data-poor target region (Lima).We then built an instance-weighted random forest model to predictdaily PM2.5 concentrations across Lima from 2010 to 2023.The model achieved a cross-validated R2 of 0.76 and reduced potential overestimation in mountainous regions(average PM2.5 reduced from 34.19 to 29.23 μg/m3). This approach provides a scalable solution to support robustepidemiological research and public health planning across data-scarcesettings.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2279–2289"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric N2O Observations Suggest Shifting Regional Emission Influences in Southern China 大气N2O观测表明中国南方区域排放影响变化

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-11 DOI: 10.1021/acsestair.6c00132

Yi Zhong, Tong Xu, Gengchen Wu, Jiangyong Li, Chengliang Zhang, Hao Wang, Xuefeng Shi, Haijun Gong, Jinying Chen, Weiting Chen, Shuo Deng, Boguang Wang

{"title":"Atmospheric N2O Observations Suggest Shifting Regional Emission Influences in Southern China","authors":"Yi Zhong, Tong Xu, Gengchen Wu, Jiangyong Li, Chengliang Zhang, Hao Wang, Xuefeng Shi, Haijun Gong, Jinying Chen, Weiting Chen, Shuo Deng, Boguang Wang","doi":"10.1021/acsestair.6c00132","DOIUrl":"https://doi.org/10.1021/acsestair.6c00132","url":null,"abstract":"Atmospheric nitrous oxide (N2O) continuesto increaseglobally, yet long-term observations remain limited in regions affectedby multiple anthropogenic sources. Here, we report continuous atmosphericN2O measurements conducted at Yuanzu Mountain (Mt. YZ)in southern China during 2018–2021 and evaluate temporal variabilityand potential regional influences. Background signals were extractedusing meteorological screening followed by the robust extraction ofbaseline signals (REBS) method, with moving average filtering (MAF)and the Thoning curve-fitting (THO) applied to assess method dependence.The REBS-derived mean background N2O concentration was328.09 ± 3.18 ppb (mean ± SD), lower than contemporaneousvalues at Mauna Loa and Waliguan; MAF and THO yielded slightly higherestimates but confirmed this lower background feature. Seasonal amplitudeswere nearly identical across methods, whereas annual growth ratesvaried from 0.62 to 1.36 ppb yr–1. All methods showeda pronounced increase from 2018 to 2019, followed by weakened annualincrements. Potential Source Contribution Function (PSCF) analysisidentified Guangdong, Guangxi, Hunan, Hubei, Jiangxi, Fujian and adjacentcoastal areas, and the continental shelf of the northern South ChinaSea as major potential source regions. Spatial consistency with emissioninventories and sectoral statistics suggests that the interannualpattern reflects integrated effects of evolving regional sources andoffsets. These findings improve understanding of the drivers of atmosphericN2O variability in southern China and provide observationalsupport for regional greenhouse gas monitoring and mitigation.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2290–2301"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying Drivers of Aerosol Acidity in Diverse Atmospheric Chemical Regimes 不同大气化学状态下气溶胶酸度驱动因子的量化

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-26 DOI: 10.1021/acsestair.6c00078

Xurong Wang, Alexandra P. Tsimpidi, Nikolaos Mihalopoulos, Shaojie Song, Yele Sun, Anke C. Nölscher, Vlassis A. Karydis

{"title":"Quantifying Drivers of Aerosol Acidity in Diverse Atmospheric Chemical Regimes","authors":"Xurong Wang, Alexandra P. Tsimpidi, Nikolaos Mihalopoulos, Shaojie Song, Yele Sun, Anke C. Nölscher, Vlassis A. Karydis","doi":"10.1021/acsestair.6c00078","DOIUrl":"https://doi.org/10.1021/acsestair.6c00078","url":null,"abstract":"Aerosol acidity playsa crucial role in atmospheric processes andthe Earth system. It exhibits distinct global patterns driven by aerosolchemical composition, particle mass abundance, and meteorologicalconditions. However, its response to these factors remains debatedand has mostly been examined under limited conditions. In this study,the EMAC chemistry-climate model is used for a decadal simulationof global aerosol acidity, evaluated against field measurements fromNorth America, Europe, and East Asia. Through sensitivity experiments,we quantify aerosol acidity responses to key chemical and meteorologicalfactors and disentangle their effects via the H+ (proton-related)and H2O (water-related) pathways. Our findings reveal thattotal ammonium (TNH4+ = NH3 + NH4+) and sulfate (SO42–) are the dominant chemical factors controlling aerosol acidity acrossall examined regimes. Reducing TNH4+ enhancesacidity, whereas SO42- reduction increasespH, both acting primarily through the H+ pathway. Totalnitrate (TNO3– = HNO3 + NO3–) exerts a weaker, more complex influencedue to compensating H+ and H2O effects. Reductionof nonvolatile cations elevates aerosol acidity at coastal sites byreleasing free H+. Meteorological perturbations modifyboth aerosol liquid water and gas–particle partitioning ofsemivolatile species. Warming generally enhances aerosol acidity viathe H+ pathway, while higher humidity reduces it throughdilution, although responses may reverse in SO42– or NO3– dominated regimes. This studyprovides a novel mechanistic framework linking meteorology, chemicalcomposition, and aerosol acidity.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2236–2253"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a Hydrogen Full-Flow Sampling (H2FFS) System to Quantify Hydrogen Leak and Loss Emissions 氢全流采样（H2FFS）系统的开发，用于量化氢泄漏和损失排放

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-21 DOI: 10.1021/acsestair.5c00517

Derek Johnson, Filiz Kazan, Christopher Ulishney, Christopher Loomis, David Childs, Scott Wayne, William Gillespie, David L. McKain, Nigel N. Clark

{"title":"Development of a Hydrogen Full-Flow Sampling (H2FFS) System to Quantify Hydrogen Leak and Loss Emissions","authors":"Derek Johnson, Filiz Kazan, Christopher Ulishney, Christopher Loomis, David Childs, Scott Wayne, William Gillespie, David L. McKain, Nigel N. Clark","doi":"10.1021/acsestair.5c00517","DOIUrl":"https://doi.org/10.1021/acsestair.5c00517","url":null,"abstract":"Though H2 is not a greenhouse gas, it hasan impacton atmospheric chemistry that indirectly leads to warming. Becausehydrogen is highly flammable, prior measurement efforts focused onsafety. However, gauging the environmental impact of H2 emissions requires quantifying mass emission rates. We developeda full-flow sampling (FFS) system to quantify H2 emissions(H2FFS). We targeted an objective measurement uncertaintyof ±15%. Various H2 concentration sensors were evaluated.Using controlled releases (full sample recovery tests─FSRTs),the H2FFS with its two electrochemical sensors demonstratedacceptable accuracy for H2 emissions from 0.5 to 10 g/h,while the H2FFS with its thermal conductivity demonstratedacceptable accuracy for H2 emissions from 100 to 500 g/h.The H2FFS with the spectral analyzer demonstrated acceptableaccuracy for H2 emissions from 0.5 to 500 g/h. Leaks quantifiedduring preliminary field testing at a H2 fueling stationwere found to range from 0.0 to 2.2 g/h, requiring accurate H2 measurement at the ppm level. Vent emissions were higher,which led to a modification of the system to include higher flow rates(up to 17 m3/min or 600 SCFM) and concentrations (up to3%), but intermittent mass emissions were still higher than the calibratedrange (>4.3 kg/h).","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2212–2224"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Short-Term Impact of a Portable Air Cleaner on Cognitive Performance 便携式空气净化器对认知能力的短期影响

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-18 DOI: 10.1021/acsestair.6c00209

M. Rafsan Nahian, Bowen Du, Alexander Y. Mendell, Zoe Hoskin, Reza Daneshazarian, Melisa Gumus, Athanasios Bourganos, Michael Mack, Jeffrey A. Siegel

{"title":"Short-Term Impact of a Portable Air Cleaner on Cognitive Performance","authors":"M. Rafsan Nahian, Bowen Du, Alexander Y. Mendell, Zoe Hoskin, Reza Daneshazarian, Melisa Gumus, Athanasios Bourganos, Michael Mack, Jeffrey A. Siegel","doi":"10.1021/acsestair.6c00209","DOIUrl":"https://doi.org/10.1021/acsestair.6c00209","url":null,"abstract":"Portable air cleaners (PACs) are commonly used to removeairborneparticulate matter (PM) from indoor environments. This study evaluatedthe impact of a PAC on cognitive performance among 62 participantsin an office environment by using a computer-based cognitive testbattery of six tasks. Participants were exposed to PM from an essentialoil diffuser with unscented oil and tap water during both air cleanerand placebo conditions in a balanced design. PM concentrations were2.4 to 4 times lower when using the PAC compared to the placebo condition.Despite the significant reduction in PM levels, no significant improvementin cognitive scores was observed during PAC operation. However, usinga mixed-effects model with outliers removed, a significant improvementin the feature match task was observed. When the PAC achieved a higherreduction in PM2.5 concentration, cognitive scores improvedfor three out of six tasks when compared to a smaller reduction inPM2.5, although the effect was not statistically significant.There was also no ordering effect between initial and subsequent placementsof participants in either condition. Overall, these results indicatethat although PACs effectively reduce PM, their impact on cognitiveperformance remains uncertain and may vary with PM source type, concentration,exposure duration, task demands, and other contextual factors.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2414–2426"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric Emissions of Short- and Medium-Chain Chlorinated Paraffins from Polyvinyl Chloride/Plastics and Rubber Products Incineration 聚氯乙烯/塑料和橡胶制品焚烧产生的短链和中链氯化石蜡的大气排放

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-03-16 DOI: 10.1021/acsestair.5c00477

Dan Xia, Ang Zhao, Rongjing Lu, Dongdong Zhang, Zeyin Peng, Yifei Sun

{"title":"Atmospheric Emissions of Short- and Medium-Chain Chlorinated Paraffins from Polyvinyl Chloride/Plastics and Rubber Products Incineration","authors":"Dan Xia, Ang Zhao, Rongjing Lu, Dongdong Zhang, Zeyin Peng, Yifei Sun","doi":"10.1021/acsestair.5c00477","DOIUrl":"https://doi.org/10.1021/acsestair.5c00477","url":null,"abstract":"The widespread incineration disposal of waste polymersmay leadto the release of chemical additives. Chlorinated paraffins (CPs),one of the most widely used additives in plastic and rubber products,have drawn significant attention due to their toxicity and environmentalpersistence. However, research regarding the release characteristicsof CP additives during the incineration process remains sparse. Thisstudy systematically investigated how product properties and combustionconditions influence short-chain CP and medium-chain CP emission profilesthrough the thermochemical treatment of three commonly used poly(vinylchloride) (PVC) products and three rubber products. The results showedthat, on average, PVC products released 468.1 μg/g of SCCPsand 62,780.2 μg/g of MCCPs, whereas rubber products released13.9 μg/g of SCCPs and 94.9 μg/g of MCCPs. Among them,PVC cable sheaths exhibited the highest release level. Based on thedata, we estimated the national total emissions of CPs in China. Ifall PVC products were incinerated at medium temperatures, approximately0.27 Mt of CPs would be produced annually, representing a 413% increasecompared to high-temperature incineration. Avoiding medium-temperatureincineration is critical for minimizing the CP release from PVC productsinto the surrounding environment. This study provides a scientificbasis for developing CP emission reduction strategies during wasteincineration.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2204–2211"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigating NOx Emissions from Concrete Supply Chain Transportation in Beijing, China: Inventory, Scenarios, and Clean Transition Pathways 减少中国北京混凝土供应链运输中的氮氧化物排放：库存、情景和清洁过渡路径

ACS ES&T Air Pub Date : 2026-09-11 Epub Date: 2026-08-27 DOI: 10.1021/acsestair.6c00215

Xin Gao, Yajun Wu, Gen Zhang, Yangyang Cui, Furong Yu, Yifeng Xue

{"title":"Mitigating NOx Emissions from Concrete Supply Chain Transportation in Beijing, China: Inventory, Scenarios, and Clean Transition Pathways","authors":"Xin Gao, Yajun Wu, Gen Zhang, Yangyang Cui, Furong Yu, Yifeng Xue","doi":"10.1021/acsestair.6c00215","DOIUrl":"https://doi.org/10.1021/acsestair.6c00215","url":null,"abstract":"Concrete supply chain transportation is a concentratedbut oftenhidden source of urban freight emissions in megacities. This studydevelops a segment-resolved bottom-up NOx emissioninventory for Beijing’s concrete supply chain in 2024, coveringaggregate, cement, rail-to-truck transfer, and ready-mixed concretedelivery activities, and couples it with a logistic technology-diffusionmodel and Monte Carlo uncertainty analysis to evaluate clean-transitionpathways through 2035. Results show that NOx emissionsfrom concrete supply chain transportation reached 4994.7 tonnes in2024, equivalent to approximately 20.0% of Beijing’s totalon-road vehicle NOx emissions. Emissions were highly concentratedin aggregate inter-regional road transportation (58.5%) and concretelocal road transportation (31.9%), while China V heavy-duty dieseltrucks were the dominant fleet contributor. Under business as usual(BAU), natural fleet turnover reduces NOx emissionsby 49.9% by 2035. Road-to-rail modal shift (RTR) and vehicle electrificationtransition (VET) achieve larger reductions of 60.5% and 76.3%, respectively,and the combined policy (CP) scenario reaches an 87.8% reduction.Uncertainty analysis confirms the robust ranking of policy effectivenessdespite variability in activity levels, emission factors, and technologyadoption. These findings show that deep mitigation requires matchingpolicies to logistics functions: rail substitution for long-distancebulk haulage, electrification for short-haul urban delivery, and cleanfeeder transport to avoid end point pollution transfer.","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"3 9","pages":"2427–2436"},"PeriodicalIF":0.0,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0