4.6 Review

A Review on the Characterization and Measurement of the Carbonaceous Fraction of Particulate Matter

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Article Green & Sustainable Science & Technology

Characterization Methods of Ions and Metals in Particulate Matter Pollutants on PM2.5 and PM10 Samples from Several Emission Sources

Mauricio A. Correa et al.

Summary: This research investigated the current methods of characterization of ions and metals in particulate matter pollutants from different emission sources. The Proknow-C methodology was used, with a selection of scientific and review articles. The study examined various methodologies used to quantify ions and metals in PM, focusing on PM10 and PM2.5. The research explored the types of filters, equipment, and characterization techniques. Results showed that Proknow-C is a reliable method for analyzing PM pollution research, providing insight into metals and ions types, characterization technologies, current situations, and trends. Sulfate, nitrate, and ammonium ions accounted for 70-80% of the PM concentrations. Main metals detected included chromium, nickel, lead, cadmium, iron, manganese, coper, and zinc. The predominant detection method was inductively coupled plasma mass spectrometry. Geographic information systems were identified as a valuable tool for integrating spatial data with PM and air pollution analysis, aiding in faster diagnosis and solution implementation.

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Effects of Agricultural Waste Burning on PM2.5-Bound Polycyclic Aromatic Hydrocarbons, Carbonaceous Compositions, and Water-Soluble Ionic Species in the Ambient Air of Chiang-Mai, Thailand

Chomsri ChooChuay et al.

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POLYCYCLIC AROMATIC COMPOUNDS (2022)

Article Environmental Sciences

Seasonal variation and size distribution of inorganic and carbonaceous components, source identification of size-fractioned urban air particles in Kuala Lumpur, Malaysia

Anas Ahmad Jamhari et al.

Summary: The study determined the inorganic and carbonaceous components of urban air particles in Kuala Lumpur, with findings showing variations depending on season and particle size distribution. Specific ions and carbon components were identified as major contributors, with biomass burning and vehicle emissions identified as primary sources. Seasonal variations were observed in the distribution of these components, with different particle sizes showing varying levels of contribution from different sources.

CHEMOSPHERE (2022)

Article Environmental Sciences

Global health burden of ambient PM2.5 and the contribution of anthropogenic black carbon and organic aerosols

Sourangsu Chowdhury et al.

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ENVIRONMENT INTERNATIONAL (2022)

Article Environmental Sciences

Characteristics of fine carbonaceous aerosols in Wuhai, a resource-based city in Northern China:Insights from energy efficiency and population density

Peng Liu et al.

Summary: The study reveals that in resource-based cities, the spatial-temporal distribution of carbonaceous aerosols is influenced by factors such as population density and industrial layout, with significant contribution of SOC in the winter. Local emissions and short-range atmospheric transport from nearby areas have a significant impact on carbonaceous aerosols.

ENVIRONMENTAL POLLUTION (2022)

Article Environmental Sciences

Meteorological factors contributing to organic and elemental carbon concentrations in PM10 near an open-pit coal mine

Heli A. Arregoces et al.

Summary: In a coal mining area in northern Colombia, variations in OC and EC concentrations in PM10 were observed throughout different seasons, with the highest concentrations occurring during the transition period between the dry and wet seasons. Strong correlations between OC and EC during this transition season suggest a common primary combustion source. High concentrations of OC and EC were associated with low wind speeds moving in different directions. Atmospheric aerosol pollutants in the mining area were mainly attributed to regional atmospheric transport from industrial areas and biomass burning sites in Venezuela.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022)

Article Geosciences, Multidisciplinary

Particulate matter geochemistry of a highly industrialized region in the Caribbean: Basis for future toxicological studies

Luis F. O. Silva et al.

Summary: This study investigated the sources and concentrations of PM10 and PM2.5 in an industrial and port urban area in the Caribbean. Using various analytical methods, the main sources of PM were identified. The findings are important for improving air quality in the Caribbean region.

GEOSCIENCE FRONTIERS (2022)

Article Environmental Sciences

Characteristics of airborne particles retained on conifer needles across China in winter and preliminary evaluation of the capacity of trees in haze mitigation

Zhiguo Cao et al.

Summary: Study on needle samples collected from 78 parks and campuses in 31 cities of China revealed significant spatial variation in particulate matter (PM) retained on plant leaves (PMR), with water-soluble components accounting for 52.3% of PMR on average, where WSIS and WSOM contributed 21.4% and 30.9% to PMR respectively. The results suggest that trees can effectively remove fine particles from the air and play a significant role in mitigating haze pollution.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Environmental Sciences

Source attribution of black and Brown carbon near-UV light absorption in Beijing, China and the impact of regional air-mass transport

Michael R. Olson et al.

Summary: The study focused on estimating atmospheric light absorption related to emission sources by collecting BC and BrC data using an Aethalometer in Beijing. Mobile sources were found to be the major contributor to near-UV light absorption, with air mass origin not impacting absorption reconstruction. The approach allows for a more robust method of assigning light absorption to source categories and expanding BrC apportionment to multiple sources.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Environmental Sciences

Fireworks-a source of nanoparticles, PM2.5, PM10, and carbonaceous aerosols

Luka Pirker et al.

Summary: The study shows that fireworks have a negative impact on the environment by releasing air pollutants, including heavy metals. Findings reveal that after fireworks events, there is an increase in the concentrations of black carbon and nanoparticles in the air, as well as significant increases in the mass concentrations of PM10 and PM2.5.

AIR QUALITY ATMOSPHERE AND HEALTH (2022)

Article Environmental Sciences

Source identification of exhaust and non-exhaust traffic emissions through the elemental carbon fractions and Positive Matrix Factorization method

Tugce Demir et al.

Summary: The study discusses the importance of exhaust and non-exhaust emissions in a highway road tunnel and characterizes the specific types and proportions of emissions through chemical analysis and data processing.

ENVIRONMENTAL RESEARCH (2022)

Article Environmental Sciences

Characteristics of the chemical composition and source apportionment of PM2.5 for a one-year period in Wuhan, China

Xiaoyu Zhang et al.

Summary: This study collected 123 PM2.5 filter samples in Wuhan, Hubei province from December 2014 to November 2015. The study found that the PM2.5 concentration was higher in winter and lower in summer. Water-soluble inorganic ions, organic carbon, elemental carbon, and inorganic elements were identified as the main components of PM2.5. Five major pollution sources, including secondary inorganic aerosols, coal combustion, industry, vehicle emissions, and fugitive dust, were identified.

JOURNAL OF ATMOSPHERIC CHEMISTRY (2022)

Article Environmental Sciences

Seasonal abundances of primary and secondary carbonaceous aerosols at a high-altitude station in the Western Ghat Mountains, India

P. S. Buchunde et al.

Summary: The study focused on the observation results of Organic Carbon (OC) and Elemental Carbon (EC) over a high-altitude location in the Western Ghats of peninsular India during 2019-20. Higher OC mass was observed in summer while higher EC mass was observed in winter. Winter showed a higher presence of primary organic carbon and summer showed a higher presence of secondary organic carbon.

AIR QUALITY ATMOSPHERE AND HEALTH (2022)

Article Meteorology & Atmospheric Sciences

Carbonaceous aerosols in five European cities: Insights into primary emissions and secondary particle formation

Sarkawt Hama et al.

Summary: This study conducted a one-year intensive measurement campaign in the North-West European region, analyzing the composition of organic carbon and elemental carbon in atmospheric aerosol particles, and investigating the seasonal variations of carbonaceous components.

ATMOSPHERIC RESEARCH (2022)

Article Environmental Sciences

Vehicle exhausts contribute high near-UV absorption through carbonaceous aerosol during winter in a fast-growing city of Sichuan Basin, China

Song Liu et al.

Summary: This study analyzed PM2.5 samples collected from three urban sites in Yibin, China and found that carbonaceous aerosols were the most abundant species and vehicular emissions were the main source of PM2.5 and brown carbon (BrC) during winter. The findings highlight the importance of reducing vehicular emissions for improving atmospheric visibility in rapidly developing cities.

ENVIRONMENTAL POLLUTION (2022)

Article Environmental Sciences

The complexation between transition metals and water-soluble organic compounds (WSOC) and its effect on reactive oxygen species (ROS) formation

Yu Yan et al.

Summary: The complexation between transition metals (TMs) and water-soluble organic compounds (WSOCs) in atmospheric particles plays a role in the generation of reactive oxygen species (ROS). This study found that the complexation between WSOC and Cu or Mn has a synergistic effect on ROS generation, while the complexation with Fe has a negative effect. The hydrophobic fraction of WSOC and the rate of ROS generation decrease during the complexation process. Cu-WSOC exhibits the most significant synergistic effect on ROS generation, suggesting that aromatic and polar substituents in WSOC dominate the complexation process.

ATMOSPHERIC ENVIRONMENT (2022)

Article Environmental Sciences

Modeling atmospheric aging of small-scale wood combustion emissions: distinguishing causal effects from non-causal associations

Ville Leinonen et al.

Summary: This study introduces a methodology for simplifying the complex process of small-scale wood combustion emissions and describes their evolution using a statistical model. The model is able to reproduce the temporal evolution of variables, but the complexity of measured data makes it difficult to determine the relationships between variables.

ENVIRONMENTAL SCIENCE-ATMOSPHERES (2022)

Article Geosciences, Multidisciplinary

Measurements of optical properties of black and brown carbon using multi-wavelength absorption technique at Mumbai, India

T. D. Rathod et al.

Summary: The multi-wavelength absorption of ambient aerosols in Mumbai, India was measured, and the wavelength dependence of light absorption was analyzed. The absorption coefficients and angstrom exponents of black and brown carbon were determined. Brown carbon showed higher absorption coefficients and angstrom exponents compared to black carbon, with significant seasonal variations. Brown carbon contributed less to the total aerosol light absorption at 370 nm.

JOURNAL OF EARTH SYSTEM SCIENCE (2022)

Article Environmental Sciences

Exploratory analysis of carbonaceous PM2.5 species in urban environments: Relationship with meteorological variables and satellite data

Ana Amarillo et al.

Summary: The study analyzed the carbonaceous chemical composition and mass concentration of PM2.5 particles in the metropolitan area of Córdoba city, and found spatial variations in the mass concentrations throughout the city. The data showed a negative correlation between meteorological parameters and PM2.5 concentrations, with PM2.5 having a negative effect on particles, suggesting a local radiative heating effect due to PM2.5.

ATMOSPHERIC ENVIRONMENT (2021)

Article Environmental Sciences

Appraisal of regional haze event and its relationship with PM2.5 concentration, crop residue burning and meteorology in Chandigarh, India

Khaiwal Ravindra et al.

Summary: Air pollution affects not only the air quality in megacities, but also in medium and small-sized cities due to rapid urbanization, industrialization, and other anthropogenic activities. A study conducted in Chandigarh showed that during a haze episode, PM2.5 concentration was four times higher than usual, and there was a strong correlation between PM2.5 and CO, possibly from burning of solid organic matter.

CHEMOSPHERE (2021)

Article Environmental Sciences

Seasonal variations in the mass characteristics and optical properties of carbonaceous constituents of PM2.5 in six cities of North China

Lining Luo et al.

Summary: This study investigates the seasonal measurements of organic carbon (OC) and elemental carbon (EC) in PM2.5 during autumn and winter in six selected cities in China. The results show that carbonaceous constituents have various adverse impacts on human health, visibility, and climate change, and highlight the need to strengthen pollution control in certain border zones in North China.

ENVIRONMENTAL POLLUTION (2021)

Article Environmental Sciences

Real-world vehicular emissions in the Indian megacity: Carbonaceous, metal and morphological characterization, and the emission factors

Nagendra Raparthi et al.

Summary: This study developed real-world vehicular fleet emissions factors through twin-site measurements in India for the first time. The study measured various pollutants and characterized particulate matter for metals, carbonaceous constituents, and morphology. The study found that traffic composition, temperature, and humidity significantly affected the measured emissions factors, leading to high uncertainties.

URBAN CLIMATE (2021)

Article Environmental Sciences

Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities

Qian Zhang et al.

Summary: The study conducted a winter campaign in six Chinese megacities to characterize black carbon (BC) and brown carbon (BrC) in PM2.5, revealing higher light-absorbing coefficients of BC and BrC in northern cities compared to southern cities. Liquid fuel combustion was found to dominate BC in Guangzhou and Wuhan, while solid fuels contributed significantly in the other cities with high primary BrC abundances. Diurnal trends showed different formation mechanisms for secondary BrC in northern and southern cities, suggesting the need for region-specific control practices.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Temporal and spatial variability of carbonaceous species (EC; OC; WSOC and SOA) in PM2.5 aerosol over five sites of Indo-Gangetic Plain

Himadri S. Bhowmik et al.

Summary: The study in the Indo-Gangetic plain found that organic carbon (OC) dominates in the PM2.5 particles during winter, while water-soluble organic carbon (WSOC) increases notably in summer. The high OC/EC ratio during winter and post-monsoon indicates biomass burning as the primary source, while WSOC shows a significant contribution from secondary sources with variations across different sites.

ATMOSPHERIC POLLUTION RESEARCH (2021)

Article Environmental Sciences

Seasonal Variation of Black Carbon in Fine Particulate Matter in Semi-urban and Agricultural Areas of Thailand

Thunwadee Srithawirat et al.

Summary: Black carbon (BC) concentrations associated with fine particulate matter (PM2.5) in semi-urban and agricultural areas in Thailand show significant seasonal variations and contribute a considerable percentage to PM2.5 levels. Both local and regional sources of BC are important, with impacts from distant areas such as the northern part of Thailand and Cambodia. Effective air quality control strategies should take into consideration the complex transboundary nature of the issue.

AEROSOL SCIENCE AND ENGINEERING (2021)

Article Environmental Sciences

Size distribution and formation processes of aerosol water-soluble organic carbon during winter and summer in urban Beijing

Xue Ni et al.

Summary: The study investigated the size-resolved aerosol organic carbon (OC) and water-soluble OC (WSOC) in urban Beijing between 2013 and 2018. Results showed seasonal variations and size distribution differences in OC and WSOC concentrations, with insights into the formation processes of WSOC. This research provides important implications for air pollution control in Beijing and surrounding regions.

ATMOSPHERIC ENVIRONMENT (2021)

Article Meteorology & Atmospheric Sciences

Role of sulphate and carbonaceous aerosols on the radiative effects of aerosols over a remote high-altitude site Lachung in the Eastern Himalayas

B. S. Arun et al.

Summary: The study of aerosols in the remote high-altitude site in the eastern Himalayas revealed the significant contribution of sulphate and carbonaceous aerosols to the total aerosol mass loading in winter and spring, resulting in high scattering and absorption coefficients. The seasonal aerosol direct radiative forcing was as high as -2.9 Wm-2 in winter and -2.8 Wm-2 in spring, with the combined effect of carbonaceous and sulphate aerosols causing the highest surface cooling in spring.

ATMOSPHERIC RESEARCH (2021)

Article Environmental Sciences

Exposure levels to PM2.5 and black carbon for people with disabilities in rural homes of Colombia

Leonel Alexander Martinez Vallejo et al.

Summary: This study is the first of its kind in a rural area of South America, investigating indoor air pollution caused by solid fuels used for cooking or heating. It found that households using firewood had significantly higher concentrations of PM2.5 and black carbon compared to those using gas, with 57% exceeding WHO guidelines for PM2.5. The research also discovered that rural concentrations of black carbon can be up to 2.5 times higher than urban areas with high vehicular traffic and population density, highlighting the need for control mechanisms to reduce indoor air pollution.

ENVIRONMENTAL MONITORING AND ASSESSMENT (2021)

Article Environmental Sciences

Characteristics of carbonaceous aerosols derived from long-term high-resolution measurements at a high-altitude site in the central Himalayas: radiative forcing estimates and role of meteorology and biomass burning

Priyanka Srivastava et al.

Summary: The study conducted simultaneous observations of organic carbon (OC) and elemental carbon (EC) over a high-altitude site in the central Himalayas from 2014 to 2017, revealing that the springtime maximum in OC and EC concentrations was primarily due to biomass burning in northern India, while autumn/winter peaks were likely influenced by local sources.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Article Environmental Sciences

Source apportionment in PM2.5 in central Japan using positive matrix factorization focusing on small-scale local biomass burning

Fumikazu Ikemori et al.

Summary: This study discusses the impacts of small-scale biomass burning on air quality in urban and suburban areas of central Japan, showing that in fall BB is a significant source of PM2.5, organic carbon, and elemental carbon. High concentrations of levoglucosan were observed at both suburban and urban sites, with air masses transported from Northeast China influencing levoglucosan levels. Local or regional BB emissions were prevalent at most sites, with urban sites near farmland showing higher BB contributions to PM2.5 in fall and winter.

ATMOSPHERIC POLLUTION RESEARCH (2021)

Article Engineering, Chemical

Composition of particulate matter during a wildfire smoke episode in an urban area

Tamara L. Sparks et al.

Summary: The composition of wildfire smoke particulate matter was analyzed in the San Francisco Bay Area during a 2018 smoke episode, showing higher concentrations of submicron, spherical, carbonaceous PM and enhanced coarse ash aluminosilicates and potassium bearing particles during wildfire periods compared to non-wildfire periods. More UV light was absorbed by PM during wildfires, indicating higher organic content. Indoor and outdoor PM ratios varied during the wildfire episode, with differences in particle types and potential local sources of pollution.

AEROSOL SCIENCE AND TECHNOLOGY (2021)

Article Environmental Sciences

Sources and characteristics of light-absorbing fine particulates over Delhi through the synergy of real-time optical and chemical measurements

Atinderpal Singh et al.

Summary: This study investigates the light absorption characteristics of fine atmospheric particulates in Delhi during winter, focusing on the contributions of black carbon and brown carbon to the total absorption using the absorption ?ngstro?m exponent method. The study reveals variations in absorption characteristics at different wavelengths and the dominance of primary and secondary sources of brown carbon. Additionally, the research analyzes the sources of organic aerosols and their mass absorption efficiencies, providing insights into the composition and impact of different types of aerosols on BrC absorption.

ATMOSPHERIC ENVIRONMENT (2021)

Article Environmental Sciences

Preliminary study of black carbon content in airborne particulate matters from an open site in the city of Yaounde, Cameroon

Nasser Nducol et al.

Summary: This study investigated the concentration of black carbon in Yaounde, highlighting fluctuations in concentration on different dates and seasons, with BC2.5-10 values observed only in specific periods. The annual average contributions of BC2.5 and BC2.5-10 were 1.18 μg/m³ and 0.66 μg/m³, respectively, with predominant sources being agricultural burning, gasoline, and household burning.

ENVIRONMENTAL MONITORING AND ASSESSMENT (2021)

Article Environmental Sciences

The characteristics of carbonaceous particles down to the nanoparticle range in Rangsit city in the Bangkok Metropolitan Region, Thailand

Yaowatat Boongla et al.

Summary: The study on atmospheric particles in Rangsit City in the Bangkok Metropolitan Region found different sources influencing the particles, with vehicular traffic and open biomass burning playing significant roles. Secondary organic carbon was found to be important in the formation of particles during the wet season, while long-range transport and other emission sources could contribute to carbon content in the atmosphere during the dry season.

ENVIRONMENTAL POLLUTION (2021)

Article Engineering, Chemical

The characteristics of particulate matter and optical properties of Brown carbon in air lean condition related to residential coal combustion

Shiyu Song et al.

Summary: The study showed that high temperatures promote the formation of sub-micron and ultra-micron particles, coal types have a significant impact on the formation of EC aerosols, with EC mass decreasing as geological maturity increases, and temperature affecting EC formation, with more EC components generated at lower temperatures. The optical properties of the aerosol particles indicated high wavelength-dependence characteristics and strong light-absorbing abilities of BrC from residential coal burning, with AAE values decreasing with increasing FC/VM ratio and decreasing OC/(OC + EC) and MAE365 values being higher in low-temperature combustion.

POWDER TECHNOLOGY (2021)

Article Environmental Sciences

Emissions and light absorption of carbonaceous aerosols from on-road vehicles in an urban tunnel in south China

Runqi Zhang et al.

Summary: It is essential to characterize and update vehicular emissions of carbonaceous aerosols with changing numbers, compositions, emission standards and fuel quality of on-road vehicles. Diesel vehicles, despite representing only 4% of the fleet, dominate on-road vehicular carbonaceous aerosol emissions due to their significantly higher average emission factors compared to gasoline vehicles. Additionally, brown carbon accounts for a significant portion of total carbonaceous light absorption.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Water-soluble brown carbon in atmospheric aerosols along the transport pathway of Asian dust: Optical properties, chemical compositions, and potential sources

Hui Wen et al.

Summary: Brown carbon (BrC) has the potential to affect atmospheric photochemistry and Earth's energy budget. A comprehensive field campaign in northern China found that dust input and strong northwesterly winds reduced water-soluble carbon concentrations and absorption efficiency in Zhangbei and Jinan, while high molecular weight organic compounds and biogenic matter increased WSOC and MAE 365 values in Erenhot.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Light-absorption properties of brown carbon aerosols in the Asian outflow: Implications of a combination of filter and ground remote-sensing observations at Fukue Island, Japan

Chunmao Zhu et al.

Summary: Brown carbon (BrC) aerosols have important warming effects on Earth's radiative forcing. This study evaluated the evolution of the light-absorption properties of BrC aerosols in the Asian outflow region using in-situ filter measurements and sky radiometer observations. The results showed a positive correlation between the light-absorption properties of BrC obtained from different methods, suggesting successful capture of BrC dynamics and climatic effects in East Asia.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Size-Segregated Particulate Matter Down to PM0.1 and Carbon Content during the Rainy and Dry Seasons in Sumatra Island, Indonesia

Muhammad Amin et al.

Summary: The study found that in both the rainy and dry seasons in Sumatra island, PM0.1 particles were mainly influenced by local vehicle combustion emissions, while biomass burning had a more sensitive effect on the PM0.5-1 fraction during the dry season, especially in Jambi and Pekanbaru areas.

ATMOSPHERE (2021)

Article Environmental Sciences

Substantial decreases of light absorption, concentrations and relative contributions of fossil fuel to light-absorbing carbonaceous aerosols attributed to the COVID-19 lockdown in east China

Yu-Chi Lin et al.

Summary: Lockdown measures during the COVID-19 pandemic in China significantly reduced black carbon and secondary brown carbon absorption, leading to a 36% decrease in solar energy absorbance. The study also found changes in diurnal variations of light absorption and a decrease in the contribution of fossil fuel combustion to black carbon.

ENVIRONMENTAL POLLUTION (2021)

Article Environmental Sciences

Seasonal variation and sources of carbonaceous species and elements in PM2.5 and PM10 over the eastern Himalaya

Sudhir Kumar Sharma et al.

Summary: The study investigated the seasonal characteristics and prominent sources of PM2.5 and PM10 in the high altitude of the eastern Himalaya, showing monthly and seasonal variations in carbonaceous aerosols and elements. The analysis identified four common sources of PM2.5 and PM10 in Darjeeling, highlighting the influence of mineral dust and the positive relationship between different components of aerosols.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Article Environmental Sciences

Characterization of airborne particulate fractions from the port city of Rijeka, Croatia

Boris Mifka et al.

Summary: The aim of this study was to characterize airborne particulates in the port city of Rijeka to evaluate the impact of ship emissions on air quality. The distribution of airborne fractions showed a bimodal distribution with contributions from different sources, including a 3% contribution from ship emissions. The study also found a twofold increase in ship traffic's contribution to primary emission of particulate matter relative to previous years, as indicated by using vanadium as a tracer.

MARINE POLLUTION BULLETIN (2021)

Review Physics, Multidisciplinary

An overview of optical and thermal methods for the characterization of carbonaceous aerosol

D. Massabo et al.

Summary: This review article summarizes the importance of carbonaceous aerosols in the atmosphere and their impact on climate and human health. It discusses methodologies for quantifying specific carbon species in aerosols and highlights some of the unresolved issues in the field.

RIVISTA DEL NUOVO CIMENTO (2021)

Article Engineering, Environmental

Ambient PM2.5 organic and elemental carbon in New York City: changing source contributions during a decade of large emission reductions

Charles L. Blanchard et al.

Summary: In the past decades, significant emission reductions in New York State and neighboring areas have led to a decline in CO, NOx, SO2, VOCs, and primary PM2.5. PM2.5 mass concentrations decreased but the contributions of different sources to changes in PM2.5 elemental carbon and organic carbon remain unclear.

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (2021)

Article Environmental Sciences

Emission reduction of black carbon and polycyclic aromatic hydrocarbons during COVID-19 pandemic lockdown

Balram Ambade et al.

Summary: The global pandemic COVID-19 required various responses, including social distancing, mask-wearing, and lockdowns. This study evaluated the changes in pollution levels during lockdown and found significant reductions in concentrations of black carbon, polycyclic aromatic hydrocarbons, and PM2.5, with changes in emission sources identified before and during lockdown.

AIR QUALITY ATMOSPHERE AND HEALTH (2021)

Article Environmental Sciences

Chemical characterization and source apportionment of PM2.5 at an urban site in Gwangju, Korea

Geun Hye Yu et al.

Summary: The study emphasizes the importance of identifying chemical species contributing to PM2.5 pollution in urban environments. Organic matter was found to be the dominant contributor to PM2.5, with different major chemical species causing pollution episodes depending on the season. Mobile-related emissions, including traffic and brake and tire wearing processes, were identified as crucial sources of PM2.5 pollution in the Gwangju metropolitan area.

ATMOSPHERIC POLLUTION RESEARCH (2021)

Article Environmental Sciences

Contribution of brown carbon to the light absorption and radiative effect of carbonaceous aerosols from biomass burning emissions in Chiang Mai, Thailand

Ying Zhang et al.

Summary: This study used a global chemical transport model to estimate the radiative effects of biomass burning aerosols in Chiang Mai, with a focus on the unique role of brown carbon in contributing to atmospheric warming in the region.

ATMOSPHERIC ENVIRONMENT (2021)

Article Construction & Building Technology

Characteristics and source identification of fine particles in the Nanchang subway, China

Shan Huang et al.

Summary: The study in central China's Nanchang subway found that PM2.5 levels varied greatly across different stations, subway platforms, and seasons, with the highest contamination occurring during the October holidays. The main sources of PM2.5 pollution were identified as the wheel/rail system, vehicle traffic, and coal combustion.

BUILDING AND ENVIRONMENT (2021)

Article Environmental Sciences

Analytical study on the primary and secondary organic carbon and elemental carbon in the particulate matter at the high-altitude Monte Curcio GAW station, Italy

Sacha Moretti et al.

Summary: This study thoroughly investigates the trends of organic carbon (OC) and elemental carbon (EC) concentrations in particulate matter samples collected at the Monte Curcio Observatory in southern Italy. The results show a clear seasonal variability in OC and EC concentrations, with higher levels during the warm period. The study also reveals that most of the carbonaceous aerosol is transported by long-range air masses.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Article Environmental Sciences

Seasonal characteristics and sources of carbonaceous components and elements of PM10 (2010-2019) in Delhi, India

Sudhir Kumar Sharma et al.

Summary: The study on seasonal chemical characteristics and potential sources of PM10 in an urban location of Delhi, India during 2010-2019 revealed that the major sources include biomass burning, fossil fuel combustion, and mineral dust. The statistical analysis and principal component analysis helped identify the common sources and major contributors to PM10 pollution in the region, with pollutants mainly originating from neighboring regions and sources such as industrial emissions, vehicular emissions, and soil dust contributing significantly to the PM10 concentration.

JOURNAL OF ATMOSPHERIC CHEMISTRY (2021)

Article Environmental Sciences

Source identification of PM2.5 carbonaceous aerosol using combined carbon fraction, radiocarbon and stable carbon isotope analyses in Debrecen, Hungary

Istvan Major et al.

Summary: This study analyzed PM2.5 aerosol samples collected in Debrecen, Hungary from 2011 to 2014, finding that combustion processes dominated in winter with wood fuels prevailing. Additionally, enriched ΔC-13 values in October were likely caused by long-range transport of particles from agricultural combustion of C-4 plants.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Comparative analysis of the chemical characteristics and sources of fine atmospheric particulate matter (PM2.5) at two sites in Changzhou, China

Ye Tao et al.

Summary: This study conducted a comparison of PM2.5 and its chemical components in an industrial site and a suburban site in Changzhou, China, revealing higher PM2.5 concentration in the industrial area. Water-soluble inorganic ions were identified as the major contributors to PM2.5, alongside significant fractions of carbonaceous components. Various analytical techniques such as SP-AMS and PMF were employed to characterize the chemical composition and sources of PM2.5, showing contributions from multiple sources including secondary aerosols, biomass burning, and industrial emissions.

ATMOSPHERIC POLLUTION RESEARCH (2021)

Article Environmental Sciences

Seasonal Abundance and Source Attribution of Carbonaceous Aerosols at Different Altitude of Mountainous Locations in Uttarakhand Himalaya

Amit Kumar et al.

Summary: This study investigated carbonaceous aerosol concentrations in the total suspended particles (TSP) at three mountainous sites in the Himalayas of Uttarakhand, India, finding that TSP and carbonaceous species decreased significantly with increasing altitude. The concentrations of TSP and carbonaceous species were higher in summer than winter, with significant positive correlations with meteorological factors such as temperature and solar radiation. The strong correlation between OC and EC, along with varying OC/EC ratios, suggested mixed sources of biomass burning, coal combustion, and vehicular emissions, with a higher contribution of secondary organic carbon during winter.

AEROSOL SCIENCE AND ENGINEERING (2021)

Article Environmental Sciences

Fine Particulate Matter Bound Polycyclic Aromatic Hydrocarbons and Carbonaceous Species in Delhi's Atmosphere: Seasonal Variation, Sources, and Health Risk Assessment

Amit Kumar Yadav et al.

Summary: This study found that the PM2.5 level in Delhi exceeded the national standard by over three times, with sources of PAHs and carbonaceous species mainly attributed to vehicular emissions, biomass and coal combustion, industrial emissions, and volatilization of petroleum products. Carcinogenic PAHs accounted for 41.4% of the aerosol PAHs load, leading to an estimated 25 additional cancer cases per million population due to inhalation exposure to these substances in Delhi.

AEROSOL SCIENCE AND ENGINEERING (2021)

Article Environmental Sciences

Seasonal Trends of Organic and Elemental Carbon in PM1 Measured over an Industrial Area of Delhi, India

Akash Kumar Singh et al.

Summary: The study investigated the seasonal variation of organic carbon (OC) and elemental carbon (EC) in PM1 in the industrial area of Delhi, India during 2018-2019. The results showed clear differences in concentrations based on seasons, size fractions, and concentrations, with the highest concentrations observed during the post-monsoon and winter seasons.

AEROSOL SCIENCE AND ENGINEERING (2021)

Review Environmental Sciences

A Systematic Approach to Comprehend the Role of Atmospheric Black Carbon in Different Environmental Segments

Karthik Venkatraman et al.

Summary: In recent years, human activities have increased the Earth's radiative budget, highlighting the significance of the role of black carbon (BC) in different environments. Research has focused on BC's fate after deposition, its impact on soil temperature, and atmospheric studies, providing essential information for policymakers in climate mitigation efforts.

AEROSOL SCIENCE AND ENGINEERING (2021)

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