Review Energy & Fuels
The combined effect of water and nanoparticles on diesel engine powered by biodiesel and its blends with diesel: A review
Chuanhao Jin, Jiangjun Wei
Summary: In recent years, the search for new clean fuels to replace fossil diesel has become crucial due to the shortage of fossil oil resources and environmental pollution problems. Biodiesel has gained attention for its environmental friendliness, renewable features, and wide range of sources. However, the use of biodiesel often leads to higher NOx emissions. Water, as a fuel additive, can lower the combustion temperature and reduce NOx emissions but also brings new challenges like increased CO and HC emissions. Nanoparticles are expected to address these issues with their higher surface area-to-volume ratio and catalytic properties. Therefore, it is important to investigate the effects of nanoparticles and water on the performance of biodiesel and its blends with diesel.
FUEL (2023)
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Article Green & Sustainable Science & Technology
Reducing diesel exhaust emissions by optimisation of alcohol oxygenates blend with diesel/biodiesel
Nurul Hanim Razak, Haslenda Hashim, Nor Alafiza Yunus, Jiri Jaromir Klemes
Summary: The study demonstrates that a blend of 70% diesel, 20% biodiesel, and 10% butanol is the optimal choice, providing similar performance to diesel with reduced NOx emissions of 7% to 15% at a lower cost.
JOURNAL OF CLEANER PRODUCTION (2021)
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Article Thermodynamics
Experimental study of emissions in single-cylinder diesel engine operating with diesel-biodiesel blends of palm oil-sunflower oil and ethanol
M. Vergel-Ortega, G. Valencia-Ochoa, J. Duarte-Forero
Summary: This study investigates the use of ethanol as an additive in biodiesel blends derived from palm oil and sunflower oil residues, finding that ethanol incorporation can improve thermal efficiency and reduce emissions levels in diesel engines. Integrating biodiesel and ethanol emerges as a promising alternative for reliable and sustainable operation.
CASE STUDIES IN THERMAL ENGINEERING (2021)
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Article Green & Sustainable Science & Technology
Experimental investigation on combustion and (regulated and unregulated) emissions performance of a common-rail diesel engine using partially hydrogenated biodiesel-ethanol-diesel ternary blend
Lei Zuo, Junfeng Wang, Deqing Mei, Shengchao Dai, Derick Adu-Mensah
Summary: This study aimed to establish a partial hydrogenated biodiesel-ethanol-diesel ternary blend and investigate its combustion performance and emissions. The results revealed that the ternary blend exhibited different properties compared to the binary blend in certain aspects.
RENEWABLE ENERGY (2022)
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Article Engineering, Multidisciplinary
Influence of additive mixed ethanol-biodiesel blends on diesel engine characteristics
Siraj Sayyed, Randip Kumar Das, Kishor Kulkarni, Tabish Alam, Sayed M. Eldin
Summary: Automobile pollution has caused significant environmental degradation and climate change. Research is being done to find alternative fuels that can improve efficiency and reduce emissions. This study focuses on the performance and emission characteristics of a DICI-VCR engine using ethanol and Al2O3 nanoparticle blended biodiesel. The results show a decrease in performance and an increase in certain emissions compared to pure diesel.
ALEXANDRIA ENGINEERING JOURNAL (2023)
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Article Energy & Fuels
Effect of split injection and injection pressure on CRDI engine fuelled with POME-diesel blend
P. Pavan, K. Bhaskar, S. Sekar
Summary: The experimental investigation demonstrated that a 40% reduction in NO emission was observed by introducing 10% pilot fuel and higher injection pressure at 32°bTDC compared with single injection mode at 23°bTDC. Smoke, HC, and CO emissions were found to be lower at 34°bTDC by 26.2%, 19.2%, and 21.5% respectively, with the same strategy. A slight increase in CO2 emission by 1.62% was noticed at 500 bar injection pressure at this injection timing compared to single injection mode.
FUEL (2021)
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Article Environmental Sciences
Analysis of cold-start NO2 and NOx emissions, and the NO2/NOx ratio in a diesel engine powered with different diesel-biodiesel blends
Ali Zare, Svetlana Stevanovic, Mohammad Jafari, Puneet Verma, Meisam Babaie, Liping Yang, M. M. Rahman, Zoran D. Ristovski, Richard J. Brown, Timothy A. Bodisco
Summary: The study found that the use of biofuels significantly affects NOx emissions, especially during cold-start. During cold-start, NO2 and NOx emissions were higher than during hot-operation; diesel fuel had lower levels of NO2 and NOx emissions, while an increase in biofuel blend ratio led to higher emissions.
ENVIRONMENTAL POLLUTION (2021)
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Article Chemistry, Multidisciplinary
Spray and Combustion Characteristics of CTL-Diesel Fuel Blends in a Constant-Volume Combustion Chamber
Songtao Liu, Riyang Chen, Yi Wang, Yulin Chen, Xiaoyu Guo, Haozhong Huang
Summary: Coal-to-liquid (CTL) fuel is a promising alternative fuel in China due to its excellent properties, but little research has been done on its spray and combustion processes. This study investigated the characteristics of diesel fuel blends with different CTL blending ratios. The results showed that higher injection pressure led to longer spray tip penetration and enlarged spray cone angle under non-evaporation conditions. Under evaporation conditions, the STP and SCA of the fuel decreased with increasing CTL mixing ratio due to higher volatility, while ignition delay period shortened and flame lift-off length decreased.
ACS OMEGA (2023)
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Article Energy & Fuels
Effects of isobutanol fraction in diesel-biodiesel blends on combustion, injection, performance and emission parameters
Mustafa Deniz Altinkurt, Yunus Emre Ozturk, Ali Turkcan
Summary: High carbon alcohols have gained research interest in diesel engines. The effects of increasing their fractions in diesel-biodiesel blends were investigated on combustion, injection, performance and emission parameters. The results showed that increasing high carbon alcohol fraction in the blends had an impact on combustion and emissions.
FUEL (2022)
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Article Energy & Fuels
Study of Annona squamosa as alternative green power fuel in diesel engine
Devaraj Rangabashiam, H. Suresh Babu Rao, Ganesan Subbiah, Mohanavel Vinayagam
Summary: This study investigates the effects of adding nano biochar derived from sugarcane to custard seed biodiesel on the emission and performance of a compression ignition engine. The experimental results show that adding 50 ppm of biochar reduces smoke, CO, and HC emissions, while improving brake thermal efficiency.
BIOMASS CONVERSION AND BIOREFINERY (2023)
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Article Chemistry, Multidisciplinary
Analysis of Biodiesel Influence on Unregulated Gaseous Emissions of Diesel Motor Vehicles
Michal Puskar, Jozef Zivcak, Stefan Kral, Melichar Kopas, Matus Lavcak
Summary: This study focused on analyzing the influence of experimental diesel fuel mixtures on unregulated gaseous emissions from diesel vehicles. By utilizing a 13-regime engine test cycle, the study provided a comprehensive view on the emissions generation under different operational modes and loading conditions.
APPLIED SCIENCES-BASEL (2021)
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Article Thermodynamics
The production of the hydro-processed renewable diesel (HRD) and its performances from a turbo-charged diesel engine
Cho-Yu Lee, Jhe-Kai Lin, Wei-Cheng Wang, Rong-Hong Chen, Kun-Mo Lin, Herman Saputro, Huynh Thanh Cong, Thong Duc Hong, Manida Tongroon
Summary: The development of hydro-processed renewable diesel (HRD) was carried out in a lab-scale fixed-bed catalytic reactor. The performance and emissions of D100, H20, and B20 were evaluated using a turbocharged diesel engine. HRD showed little impact on CO and NOx emissions, reduced CO2 emissions by 7.4% compared to D100, and had lower HC emissions than D100 at high engine speeds. HRD also significantly reduced smoke emissions compared to biodiesel. The engine using H20 had better combustion stability and performance compared to D100 and B20.
ENERGY (2023)
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Article Energy & Fuels
Production, characterization and utilization of second generation biodiesel blend in diesel engine using water and nanoparticles as additives
Neeraj Kumar, Hifjur Raheman
Summary: The study suggests that biodiesel-diesel blend dispersed with water and CeO2 nanoparticles could be a promising alternative fuel for diesel engine with lower emissions. This blend can reduce HC, CO, and NOx emissions, while enhancing fuel thermal efficiency and energy saving effects.
FUEL (2022)
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Article Energy & Fuels
The performance and emissions characteristics of diesel/biodiesel/alcohol blends in a diesel engine
Qixin Ma, Quanchang Zhang, Jichao Liang, Chao Yang
Summary: The study found that adding alcohol to diesel-biodiesel blends can reduce engine power loss, improve stability, and lower emissions. Compared to other tested fuels, the B10P10 blend exhibited better stability and combustion state at various speeds.
ENERGY REPORTS (2021)
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Article Energy & Fuels
Effect of n-butanol/diesel blends on performance and emissions of a heavy-duty diesel engine tested under the World Harmonised Steady-State cycle
Luis Tipanluisa, Natalia Fonseca, Jesus Casanova, Jose-Maria Lopez
Summary: This study investigates the effects of different n-butanol/diesel fuel blends on a Euro V heavy-duty diesel engine's performance and emissions. The results show that using n-butanol can improve engine performance and reduce particulate emissions in most operating conditions, while increasing CO emissions. The study also indicates that THC emissions increase with n-butanol content, while NO2 emissions decrease.
FUEL (2021)
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Article Environmental Sciences
Local Air Quality Issues and Research Priorities Through the Lenses of Chilean Experts: An Ontological Analysis
Carlos A. Manzano, Manuel Jacome, Thant Syn, Carolina Molina, Richard Toro Araya, Manuel Andres Leiva-Guzman
Summary: Air pollution problems are complex and require interdisciplinary collaboration to address. By using ontological analysis and validation from multidisciplinary experts, a framework can be established to help researchers, practitioners, and policy makers better handle air quality issues, improve research allocation, and knowledge dissemination.
INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT (2021)
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Article Energy & Fuels
Hydrocarbon emissions in flex fuel vehicles using ethanol: Preliminary results using a method implemented in Brazil
Bruno Siciliano, Cleyton Martins da Silva, Luciana N. Loureiro, Pedro C. Vicentini, Graciela Arbilla
Summary: This study successfully conducted speciated analysis of hydrocarbons (HC) in exhaust emissions of flex fuel vehicles using ethanol as fuel through optimized sampling and analytical methods. The results are important for studying ozone formation in the Brazilian fuel scenario.
FUEL (2021)
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Article Geosciences, Multidisciplinary
Exploring the oxidative potential and respiratory deposition of size-segregated particulate matter at an urban site
Catalina Andrade, Carolina Molina, Luis Felipe Sanchez, Carlos A. Manzano, Richard Toro A, Manuel A. Leiva G
Summary: The adverse health effects of PM are related to oxidative stress processes, and the oxidative potential (OP) can be used as an exposure metric for assessing the health impacts of ambient PM. Research on the relationship between respiratory deposition of size-segregated PM and OP in Santiago, Chile found that PM3.2 dominated lung deposition and may have a greater negative impact on lung health due to efficient adsorption of redox chemical species.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES (2021)
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Article Energy & Fuels
Determination of size-segregated polycyclic aromatic hydrocarbon and its nitro and alkyl analogs in emissions from diesel-biodiesel blends
Sergio Machado Correa, Graciela Arbilla, Cleyton Martins da Silva, Eduardo Monteiro Martins, Simone Lorena Quiterio de Souza
Summary: This study focuses on the emissions of non-criteria pollutants, including PAHs and their nitro-PAHs and alkyl-PAHs, from biofuels and their mixtures. Results show that emissions of all PAHs increase with engine speed, but there is a reduction in total PAHs with an increase in biodiesel content, although this can lead to an increase in nitro-PAHs. High correlations were observed between PAHs and alkyl-PAHs, and between PAHs and nitro-PAHs, suggesting similar formation mechanisms for these compounds.
FUEL (2021)
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Article Environmental Sciences
Determination of trace elements in the nanometer, ultrafine, fine, and coarse particulate matters in an area affected by light vehicular emissions in the city of Rio de Janeiro
Simone Lorena Quiterio de Souza, Eduardo Monteiro Martins, Sergio Machado Correa, Josiane Loyola da Silva, Roger Rodrigues de Castro, Flavia de Souza Assed
Summary: This study aimed to determine trace element composition in particulate matters of different sizes around the UERJ Chemical Technology Applications Institute. The analysis showed that the concentrations of Cd, Ni, Pb, Cr, and Fe in these particles met air quality standards. High correlations were observed among trace elements in different particle sizes, indicating a common source of vehicular emissions.
ENVIRONMENTAL MONITORING AND ASSESSMENT (2021)
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Article Environmental Sciences
Particulate matter emissions from flex-fuel vehicles with direct fuel injection
Luiz C. Daemme, Renato Penteado, Rodrigo S. Ferreira, Marcelo R. Errera, Sergio M. Correa, Igor F. Ostapiuk
Summary: The use of varying ethanol-gasoline blends in GDI vehicles affects particulate matter emissions, with the quality and composition of emissions being dependent on the type of fuel used.
ATMOSPHERIC POLLUTION RESEARCH (2021)
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Article Environmental Sciences
Forecasts of tropospheric ozone in the Metropolitan Area of Rio de Janeiro based on missing data imputation and multivariate calibration techniques
Rafael C. G. de Oliveira, Camilla L. Cunha, Alexandre R. Torres, Sergio M. Correa
Summary: Multivariate calibration techniques, including random forest and support vector machine methods combined with the MissForest imputation algorithm, were used to analyze air quality data collected in the metropolitan area of Rio de Janeiro between 2014 and 2018. The results showed that these techniques can effectively model and predict tropospheric ozone concentrations.
ENVIRONMENTAL MONITORING AND ASSESSMENT (2021)
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Article Environmental Sciences
Atmospheric odor dispersion from oil refinery flare system: a case study
Shyrlene L. A. Oliveira, Sergio M. Correa
Summary: A flare stack is a necessary device in the oil and gas industry for safe combustion of gases. However, it is not suitable for routine gas disposal due to weather conditions and poor control. This study evaluates the impact of H2S on the well-being of the community near an oil refinery. Results show a high probability and degree of annoyance in H2S detection.
ENVIRONMENTAL MONITORING AND ASSESSMENT (2022)
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Article Environmental Sciences
Possible influence of shipping emissions on metals in size-segregated particulate matter in Guanabara Bay (Rio de Janeiro, Brazil)
Renata S. Silveira, Sergio M. Correa, Newton de M. Neto
Summary: This study analyzed the concentration of metal elements in PM samples collected from the atmosphere of Guanabara Bay in Rio de Janeiro, Brazil. The results showed that the levels of these metals exceeded the limits set by current Brazilian legislation.
ENVIRONMENTAL MONITORING AND ASSESSMENT (2022)
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Article Environmental Sciences
COVID-19 Pandemic: Impacts on Air Quality during Partial Lockdown in the Metropolitan Area of Sao Paulo
Debora Souza Alvim, Dirceu Luis Herdies, Sergio Machado Correa, Luana Santamaria Basso, Bushra Khalid, Gabriella Fernandes Prazeres Silva, Gabriel Oyerinde, Nicolli Albuquerque de Carvalho, Simone Marilene Sievert da Costa Coelho, Silvio Nilo Figueroa
Summary: Air pollution, mainly caused by motor vehicles, has a harmful effect on air quality in the Metropolitan Area of Sao Paulo (MASP), Brazil. This study investigates the effects of pollutants on air quality during the COVID-19 lockdown period. The findings show a decrease in some pollutants while ozone concentrations increased.
REMOTE SENSING (2023)
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Article Multidisciplinary Sciences
Increased Amazon carbon emissions mainly from decline in law enforcement
Luciana V. Gatti, Camilla L. Cunha, Luciano Marani, Henrique L. G. Cassol, Cassiano Gustavo Messias, Egidio Arai, A. Scott Denning, Luciana S. Soler, Claudio Almeida, Alberto Setzer, Lucas Gatti Domingues, Luana S. Basso, John B. Miller, Manuel Gloor, Caio S. C. Correia, Graciela Tejada, Raiane A. L. Neves, Raoni Rajao, Felipe Nunes, Britaldo S. S. Filho, Jair Schmitt, Carlos Nobre, Sergio M. Correa, Alber H. Sanches, Luiz E. O. C. Aragao, Liana Anderson, Celso Von Randow, Stephane P. Crispim, Francine M. Silva, Guilherme B. M. Machado
Summary: The carbon sink of the Amazon forest is declining due to land-use and climate change. The decrease in law enforcement has led to increased deforestation, biomass burning, and forest degradation, resulting in higher carbon emissions and exacerbation of drying and warming in the Amazon rainforest.
NATURE (2023)
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Article Environmental Sciences
Determination of carbonyls and size-segregated polycyclic aromatic hydrocarbons, and their nitro and alkyl analogs in emissions from diesel-biodiesel-ethanol blends
Sergio Machado Correa, Graciela Arbilla, Cleyton Martins da Silva, Eduardo Monteiro Martins, Simone Lorena Quiterio de Souza
Summary: This study investigates the emissions of carbonyls, polycyclic aromatic hydrocarbons (PAHs), and their nitro- and alkyl-derivatives in particulate matter from a diesel engine. The results show that the use of biodiesel and ethanol can reduce the emissions of PAHs and their derivatives, except for a specific blend. However, the emissions of carbonyls increase with biodiesel and ethanol. There are strong correlations between the emissions of PAHs, alkyl-PAHs, and nitro-PAHs, indicating similar formation mechanisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)
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Article Environmental Sciences
Exhaust emissions of gaseous and particle size-segregated water-soluble organic compounds from diesel-biodiesel blends
Margarita G. Evtyugina, Catia Goncalves, Celia Alves, Sergio M. Correa, Luiz Carlos Daemme, Renato de Arruda Penteado Neto
Summary: This study examined the emissions of gaseous pollutants and water-soluble organic compounds from a diesel vehicle fueled with different biodiesel blends. Increasing the biofuel content in the fuel reduced emissions of certain pollutants, but increased emissions of other compounds. Additionally, the size distribution of particle emissions was affected by the biodiesel content.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)
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Article Environmental Sciences
Analysis of the Effect of the Truck Strike and COVID-19 on the concentration of NOx and O3 in the Metropolitan Region of the Vale do Paraiba, Sao Paulo, Brazil
Ludmilla Manera Conti, Dirceu Luis Herdies, Debora Souza Alvim, Sergio Machado Correa
Summary: By studying the data of Sao Jose dos Campos and Guaratingueta, it was found that in 2018 and 2020, due to strikes and lockdowns, there was a decrease in NO and NO2 concentrations, while the influence on O3 concentrations varied between towns.
AEROSOL AND AIR QUALITY RESEARCH (2022)
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Article Environmental Sciences
Amazon methane budget derived from multi-year airborne observations highlights regional variations in emissions
Luana S. Basso, Luciano Marani, Luciana Gatti, John B. Miller, Manuel Gloor, John Melack, Henrique L. G. Cassol, Graciela Tejada, Lucas G. Domingues, Egidio Arai, Alber H. Sanchez, Sergio M. Correa, Liana Anderson, Luiz E. O. C. Aragao, Caio S. C. Correia, Stephane P. Crispim, Raiane A. L. Neves
Summary: Atmospheric methane concentrations have been rising by an average of 8 ppb per year since 2006, with wetland emissions likely playing a significant role. In the Amazon region, 46.2 +/- 10.3 Tg of methane is emitted annually, with a large proportion coming from wetlands and a distinct east-west contrast observed in emissions.
COMMUNICATIONS EARTH & ENVIRONMENT (2021)
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Article Environmental Sciences
Impact of urban spatial factors on NO2 concentration based on different socio-economic restriction scenarios in US cities
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Progression of an emission inventory of China integrating CO2 with air pollutants: A chance to learn the influence of development on emissions
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Air quality impacts from the development of unconventional oil and gas well pads: Air toxics and other volatile organic compounds
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Gaseous, particulate matter, carbonaceous compound, water-soluble ion, and trace metal emissions measured from 2019 peatland fires in Palangka Raya, Central Kalimantan
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
A high-precision retrieval method for methane vertical profiles based on dual-band spectral data from the GOSAT satellite
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Simultaneous decreases in NO2 levels and disparities in California during the COVID-19 pandemic
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Contribution of chemical composition to oxidative potential of atmospheric particles at a rural and an urban site in the Po Valley: Influence of high ammonia agriculture emissions
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Interaction of reactive mercury with surfaces and implications for atmospheric mercury speciation measurements
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Exposure estimates of PM2.5 using the land-use regression with machine learning and microenvironmental exposure models for elders: Validation and comparison
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Interactive effect of air pollutant and meteorological factors on seasonal influenza transmission, Shanghai, China
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Short-term exposure to ambient air pollution and hospital admissions for angina among older adults in South China
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
A novel algorithm for full-coverage daily aerosol optical depth retrievals using machine learning-based reconstruction technique
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Quantifying metallic components in aerosol filter samples using micro-synchrotron radiation X-ray fluorescence: With quartz filter as an example
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT (2024)
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Review Environmental Sciences
The relative importance of local climate and land use on the deposition rate of airborne microplastics on terrestrial land
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT (2024)
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Article Environmental Sciences
Transboundary transport of non-east and East Asian dust observed at Dunhuang, northwest China
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT (2024)
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