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Ma F, Su L, Tang W, Zhang R, Zhao Q, Chen J, Xie HB. Sulfuric Acid-Driven Nucleation Enhanced by Amines from Ethanol Gasoline Vehicle Emission: Machine Learning Model and Mechanistic Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:22278-22287. [PMID: 39636119 DOI: 10.1021/acs.est.4c06578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2024]
Abstract
The sulfuric acid (SA)-amine nucleation mechanism gained increasing attention due to its important role in atmospheric secondary particle formation. However, the intrinsic enhancing potential (IEP) of various amines remains largely unknown, restraining the assessment on the role of the SA-amines mechanism at various locations. Herein, machine learning (ML) models were constructed for high-throughput prediction of IEP of amines, and the nucleation mechanism of specific amines with high IEP was investigated. The formation free energy (ΔG) of SA-amines dimer clusters, a key parameter for assessing IEP, was calculated for 58 amines. Based on the calculated ΔG values, seven ML models were constructed and the best one was further utilized to predict the ΔG values of the remaining 153 amines. Diethylamine (DEA), mainly emitted from ethanol gasoline vehicles, was found to be one of the amines with the highest IEP for SA-driven nucleation. By studying larger SA-DEA clusters, it was found that the nucleation rate of DEA with SA is 3-7 times higher than that of dimethylamine, a well-known key base for SA-driven nucleation. The study provides a powerful tool for evaluating the actual role of amines on SA-driven nucleation and revealed that the mechanism could be particularly important in areas where ethanol gasoline vehicles are widely used.
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Affiliation(s)
- Fangfang Ma
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Lihao Su
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Weihao Tang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Rongjie Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Qiaojing Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Hong-Bin Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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2
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Xu Q, Ma F, Xia D, Li X, Chen J, Xie HB, Francisco JS. Two-Step Noncatalyzed Hydrolysis Mechanism of Imines at the Air-Water Interface. J Am Chem Soc 2024; 146:28866-28873. [PMID: 39378311 DOI: 10.1021/jacs.4c09080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2024]
Abstract
The hydrolysis of imines has long been assumed to be their main atmospheric fate, based on early studies in the field of organic chemistry. However, the hydrolysis mechanism and kinetics of atmospheric imines remain unclear. Here, an advanced Born-Oppenheimer molecular dynamics method was employed to investigate the noncatalyzed hydrolysis mechanism and kinetics at the air-water interface by selecting CH2NH as a model molecule. The results indicate that CH2NH exhibits a pronounced surface preference. The noncatalyzed hydrolysis of CH2NH follows a unique two-step reaction mechanism involving first proton transfer and then OH- transfer through the water bridge at the air-water interface, in contrast to the traditional one-step mechanism. The calculated reaction rate for the rate-determining step is 3.32 × 105 s-1, which is 2 orders of magnitude greater than that of the bulk phase. In addition, the involvement of the interfacial electric field further enhances the reaction rate by approximately 3 orders of magnitude. The noncatalyzed hydrolysis rate at both the air-water interface and the bulk phase is higher than that of the possible acid-catalyzed one, clarifying noncatalyzed hydrolysis as the dominant mechanism for CH2NH. This study elucidates that the noncatalyzed hydrolysis of atmospheric imines is feasible at the air-water interface and that the revealed unique two-step hydrolysis mechanism has significant implications in atmospheric and water environmental chemistry.
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Affiliation(s)
- Qian Xu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fangfang Ma
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Deming Xia
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6316, United States
| | - Xiaojing Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Hong-Bin Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Joseph S Francisco
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6316, United States
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3
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Ning A, Shen J, Zhao B, Wang S, Cai R, Jiang J, Yan C, Fu X, Zhang Y, Li J, Ouyang D, Sun Y, Saiz-Lopez A, Francisco JS, Zhang X. Overlooked significance of iodic acid in new particle formation in the continental atmosphere. Proc Natl Acad Sci U S A 2024; 121:e2404595121. [PMID: 39047040 PMCID: PMC11295062 DOI: 10.1073/pnas.2404595121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 06/25/2024] [Indexed: 07/27/2024] Open
Abstract
New particle formation (NPF) substantially affects the global radiation balance and climate. Iodic acid (IA) is a key marine NPF driver that recently has also been detected inland. However, its impact on continental particle nucleation remains unclear. Here, we provide molecular-level evidence that IA greatly facilitates clustering of two typical land-based nucleating precursors: dimethylamine (DMA) and sulfuric acid (SA), thereby enhancing particle nucleation. Incorporating this mechanism into an atmospheric chemical transport model, we show that IA-induced enhancement could realize an increase of over 20% in the SA-DMA nucleation rate in iodine-rich regions of China. With declining anthropogenic pollution driven by carbon neutrality and clean air policies in China, IA could enhance nucleation rates by 1.5 to 50 times by 2060. Our results demonstrate the overlooked key role of IA in continental NPF nucleation and highlight the necessity for considering synergistic SA-IA-DMA nucleation in atmospheric modeling for correct representation of the climatic impacts of aerosols.
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Affiliation(s)
- An Ning
- Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing100081, China
| | - Jiewen Shen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Bin Zhao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Shuxiao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Runlong Cai
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
| | - Jingkun Jiang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Chao Yan
- Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
- Joint International Research Laboratory of Atmospheric and Earth System Science, School of Atmospheric Sciences, Nanjing University, Nanjing210023, China
| | - Xiao Fu
- Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen518055, China
| | - Yunhong Zhang
- Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing100081, China
| | - Jing Li
- Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing100081, China
| | - Daiwei Ouyang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Yisheng Sun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Blas Cabrera, Spanish National Research Council, Madrid28006, Spain
| | - Joseph S. Francisco
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA19104-6316
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA19104-6316
| | - Xiuhui Zhang
- Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing100081, China
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4
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Brean J, Rowell A, Beddows DC, Weinhold K, Mettke P, Merkel M, Tuch T, Rissanen M, Maso MD, Kumar A, Barua S, Iyer S, Karppinen A, Wiedensohler A, Shi Z, Harrison RM. Road Traffic Emissions Lead to Much Enhanced New Particle Formation through Increased Growth Rates. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10664-10674. [PMID: 38850427 PMCID: PMC11191591 DOI: 10.1021/acs.est.3c10526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 06/10/2024]
Abstract
New particle formation (NPF) is a major source of atmospheric aerosol particles, including cloud condensation nuclei (CCN), by number globally. Previous research has highlighted that NPF is less frequent but more intense at roadsides compared to urban background. Here, we closely examine NPF at both background and roadside sites in urban Central Europe. We show that the concentration of oxygenated organic molecules (OOMs) is greater at the roadside, and the condensation of OOMs along with sulfuric acid onto new particles is sufficient to explain the growth at both sites. We identify a hitherto unreported traffic-related OOM source contributing 29% and 16% to total OOMs at the roadside and background, respectively. Critically, this hitherto undiscovered OOM source is an essential component of urban NPF. Without their contribution to growth rates and the subsequent enhancements to particle survival, the number of >50 nm particles produced by NPF would be reduced by a factor of 21 at the roadside site. Reductions to hydrocarbon emissions from road traffic may thereby reduce particle numbers and CCN counts.
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Affiliation(s)
- James Brean
- Division
of Environmental Health and Risk Management, School of Geography,
Earth and Environmental Sciences, University
of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Alex Rowell
- Division
of Environmental Health and Risk Management, School of Geography,
Earth and Environmental Sciences, University
of Birmingham, Birmingham B15 2TT, United Kingdom
| | - David C.S. Beddows
- Division
of Environmental Health and Risk Management, School of Geography,
Earth and Environmental Sciences, University
of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Kay Weinhold
- Leibniz
Institute for Tropospheric Research, Leipzig 04318, Germany
| | - Peter Mettke
- Leibniz
Institute for Tropospheric Research, Leipzig 04318, Germany
| | - Maik Merkel
- Leibniz
Institute for Tropospheric Research, Leipzig 04318, Germany
| | - Thomas Tuch
- Leibniz
Institute for Tropospheric Research, Leipzig 04318, Germany
| | - Matti Rissanen
- Aerosol
Physics laboratory, Tampere University, Tampere 33720, Finland
| | - Miikka Dal Maso
- Aerosol
Physics laboratory, Tampere University, Tampere 33720, Finland
| | - Avinash Kumar
- Aerosol
Physics laboratory, Tampere University, Tampere 33720, Finland
| | - Shawon Barua
- Aerosol
Physics laboratory, Tampere University, Tampere 33720, Finland
| | - Siddharth Iyer
- Aerosol
Physics laboratory, Tampere University, Tampere 33720, Finland
| | | | | | - Zongbo Shi
- Division
of Environmental Health and Risk Management, School of Geography,
Earth and Environmental Sciences, University
of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Roy M. Harrison
- Division
of Environmental Health and Risk Management, School of Geography,
Earth and Environmental Sciences, University
of Birmingham, Birmingham B15 2TT, United Kingdom
- Department
of Environmental Sciences, Faculty of Meteorology, Environment and
Arid Land Agriculture, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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5
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Zhou Y, Zhang X, Zhang C, Chen B, Gu B. Mitigating air pollution benefits multiple sustainable development goals in China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123992. [PMID: 38631451 DOI: 10.1016/j.envpol.2024.123992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/27/2024] [Accepted: 04/14/2024] [Indexed: 04/19/2024]
Abstract
Achieving the United nations 2030 Sustainable Development Goals (SDGs) remains a significant challenge, necessitating urgent and prioritized strategies. Among the various challenges, air pollution continues to pose one of the most substantial threats to the SDGs due to its widespread adverse effects on human health and ecosystems. However, the connections between air pollution and the SDGs have often been overlooked. This study reveals that out of the 169 SDG targets, 71 are adversely impacted by air pollution, while only 6 show potential positive effects. In China, two major atmospheric nitrogen pollutants, ammonia and nitrogen oxides, resulted in an economic loss of 400 billion United States Dollar (USD) in 2020, which could be reduced by 33% and 34% by 2030, respectively. It would enhance the progress towards SDGs in China by 14%, directly contributing to the achievement of SDGs 1 to 6 and 11 to 15. This improvement is estimated to yield overall benefits totaling 119 billion USD, exceeded the total implementation cost of 82 billion USD with ammonia as the preferential mitigation target. This study underscores the importance of robust scientific evidence in integrated policies aimed at aligning improvements in environmental quality with the priorities of sustainable development.
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Affiliation(s)
- Yi Zhou
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiuming Zhang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Policy Simulation Laboratory, Zhejiang University, Hangzhou 310058, China
| | - Chuanzhen Zhang
- School of Agriculture, Food and Ecosystem Sciences, The University of Melbourne, Victoria 3010, Australia
| | - Binhui Chen
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Baojing Gu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, Zhejiang University, Hangzhou 310058, China.
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6
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Leung CW, Wang X, Hu D. Characteristics and source apportionment of water-soluble organic nitrogen (WSON) in PM 2.5 in Hong Kong: With focus on amines, urea, and nitroaromatic compounds. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:133899. [PMID: 38430595 DOI: 10.1016/j.jhazmat.2024.133899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/23/2024] [Accepted: 02/24/2024] [Indexed: 03/05/2024]
Abstract
Water-soluble organic nitrogen (WSON) is ubiquitous in fine particulate matter (PM2.5) and poses health and environmental risks. However, there is limited knowledge regarding its comprehensive speciation and source-specific contributions. Here, we conducted chemical characterization and source apportionment of WSON in 65 PM2.5 samples collected in Hong Kong during a 1-yr period. Using various mass-spectrometry-based techniques, we quantified 22 nitrogen-containing organic compounds (NOCs), including 17 nitroaromatics (NACs), four amines, and urea. The most abundant amine and NACs were dimethylamine and 4-nitrocatechol, respectively. Two secondary (i.e., secondary formation and secondary nitrate) and five primary sources (i.e., sea salt, fugitive dust, marine vessels, vehicle exhaust, and biomass burning) of WSON and these three categories of NOCs were identified. Throughout the year, secondary sources dominated WSON formation (69.0%), while primary emissions had significant contributions to NACs (77.1%), amines (75.9%), and urea (83.7%). Fugitive dust was the leading source of amines and urea, while biomass burning was the main source of NACs. Our multi-linear regression analysis revealed the significant role of sulfate, NO3, nitrate, liquid water content, and particle pH on WSON formation, highlighting the importance of nighttime NO3 processing and heterogeneous and aqueous-phase formation of NOCs in the Hong Kong atmosphere.
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Affiliation(s)
- Chin Wai Leung
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region of China
| | - Xuemei Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region of China
| | - Di Hu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region of China; State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region of China; HKBU Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen 518057, PR China.
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7
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Chang Y, Feng YN, Cheng L, Hu J, Zhu L, Tan W, Zhong H, Zhang Y, Huang RJ, Sun Y. Trimethylamine from Subtropical Forests Rival Total Farmland Emissions in China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5453-5460. [PMID: 38477969 DOI: 10.1021/acs.est.4c00622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Many types of living plants release gaseous trimethylamine (TMA), making it a potentially important contributor to new particle formation (NPF) in remote areas. However, a panoramic view of the importance of forest biogenic TMA at the regional scale is lacking. Here, we pioneered nationwide mobile measurements of TMA across a transect of contiguous farmland in eastern China and a transect of subtropical forests in southern China. In contrast to the farmland route, TMA concentrations measured during the subtropical forest route correlated significantly with isoprene, suggesting potential TMA emissions from leaves. Our high time-resolved concentrations obtained from a weak photo-oxidizing atmosphere reflected freshly emitted TMA, indicating the highest emission intensity from irrigated dryland (set as the baseline of 10), followed by paddy field (7.1), subtropical evergreen forests (5.9), and subtropical broadleaf and mixed forests (4.3). Extrapolating their proportions roughly to China, subtropical forests alone, which constitute half of the total forest area, account for nearly 70% of the TMA emissions from the nation's total farmland. Our estimates, despite the uncertainties, take the first step toward large-scale assessment of forest biogenic amines, highlighting the need for observational and modeling studies to consider this hitherto overlooked source of TMA.
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Affiliation(s)
- Yunhua Chang
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Yu-Ning Feng
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Lin Cheng
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Jianlin Hu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Liang Zhu
- TOFWERK China, Nanjing 211800, China
| | - Wen Tan
- TOFWERK China, Nanjing 211800, China
| | - Haobin Zhong
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing 314001, China
| | - Yi Zhang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Ru-Jin Huang
- State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth and Environment, Chinese Academy of Sciences, Xi'an 710061, China
| | - Yele Sun
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
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8
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Brean J, Rowell A, Beddows DCS, Shi Z, Harrison RM. Estimates of Future New Particle Formation under Different Emission Scenarios in Beijing. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:4741-4750. [PMID: 36930743 PMCID: PMC10061929 DOI: 10.1021/acs.est.2c08348] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
New particle formation (NPF) is a leading source of particulate matter by number and a contributor to particle mass during haze events. Reductions in emissions of air pollutants, many of which are NPF precursors, are expected in the move toward carbon neutrality or net-zero. Expected changes to pollutant emissions are used to investigate future changes to NPF processes, in comparison to a simulation of current conditions. The projected changes to SO2 emissions are key in changing future NPF number, with different scenarios producing either a doubling or near total reduction in sulfuric acid-amine particle formation rates. Particle growth rates are projected to change little in all but the strictest emission control scenarios. These changes will reduce the particle mass arising by NPF substantially, thus showing a further cobenefit of net-zero policies. Major uncertainties remain in future NPF including the volatility of oxygenated organic molecules resulting from changes to NOx and amine emissions.
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Affiliation(s)
- James Brean
- School
of Geography, Earth & Environmental
Sciences University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Alex Rowell
- School
of Geography, Earth & Environmental
Sciences University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - David C. S. Beddows
- School
of Geography, Earth & Environmental
Sciences University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Zongbo Shi
- School
of Geography, Earth & Environmental
Sciences University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Roy M. Harrison
- School
of Geography, Earth & Environmental
Sciences University of Birmingham, Birmingham B15 2TT, United Kingdom
- Department
of Environmental Sciences, Faculty of Meteorology, Environment and
Arid Land Agriculture, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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