Jingbo Zhao

Current Organizations / Institutes

The organizations/institutes from the scholar's latest article

Civil Aviation University of China

Research Subjects

Research Interests

Jingbo Zhao has a total of 17 co-authors. Here are the top co-authors by number of shared publications:

Yanhong Xu
China Eastern Airlines Technology Application Research and Development Center Co., Ltd., Shanghai 200137, China
3 shared publications
Yaqin Ji
College of Environmental Science and Engineering, Nankai University, Tianjin, China
2 shared publications
Bo Han
School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
1 shared publication
Da Chen
Tianjin Engineering Research Center of Civil Aviation Energy Environment and Green Development, Civil Aviation University of China, Tianjin 300300, China
1 shared publication
Jian Yu
Research Centre for Environment and Sustainable Development of Civil Aviation of China, Civil Aviation University of China, Tianjin 300300, China
1 shared publication
Jingcheng Xu
Tianjin Engineering Research Center of Civil Aviation Energy Environment and Green Development, Civil Aviation University of China, Tianjin 300300, China
1 shared publication

Latest Publications

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Open Access
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Cited by 2
- 13 November 2024
- Published by MDPI AG in Atmosphere
The Characteristics of Water-Soluble Inorganic Ions in PM_1.0 and Their Impact on Visibility at a Typical Coastal Airport
by Jingbo Zhao, Yanhong Xu, Jingcheng Xu, Yaqin Ji
Water-soluble inorganic ions (WSIIs) can increase the hygroscopicity of aerosols, which will transform aerosols into larger sizes and reduce visibility by enhancing light scattering. To explore the characteristics of WSII concentrations and their impacts on visibility in a coastal airport, in this study, PM_1.0 samples at two monitoring sites (including airport site and background site) were collect in spring and summer, and 12 species of ions were detected. In general, secondary water-soluble inorganic ions (SNA, including ${SO}_{4}^{2 -}$ , ${NO}_{3}^{-}$ and ${NH}_{4}^{+}$ ) and ${Ca}^{2 +}$ were the dominant WSIIs in PM_1.0, contributing about 89% to 95% of the total measured ions. The continental contributions of ${SO}_{4}^{2 -}$ , $K^{+}$ , and ${Ca}^{2 +}$ accounted for more than 60% during the whole period, while Na⁺ and ${Cl}^{-}$ were mainly from marine sources. The source identification showed that airport emissions were a major source at the sampling site and significantly contributed to the levels of sulfate, nitrate, and ammonium. Agricultural activities were the dominant sources impacting visibility in spring, while airport emissions and secondary inorganic aerosols were the main components affecting visibility in summer. Therefore, improving atmospheric visibility in coastal airport areas should focus on reducing the precursors of secondary particulates and reducing biomass-burning activities.
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- 13 November 2024
- Published by MDPI AG in Atmosphere
Open Access
The Characteristics of Water-Soluble Inorganic Ions in PM_1.0 and Their Impact on Visibility at a Typical Coastal Airport
by Jingbo Zhao, Yanhong Xu, Jingcheng Xu, Yaqin Ji
Water-soluble inorganic ions (WSIIs) can increase the hygroscopicity of aerosols, which will transform aerosols into larger sizes and reduce visibility by enhancing light scattering. To explore the characteristics of WSII concentrations and their impacts on visibility in a coastal airport, in this study, PM_1.0 samples at two monitoring sites (including airport site and background site) were collect in spring and summer, and 12 species of ions were detected. In general, secondary water-soluble inorganic ions (SNA, including ${SO}_{4}^{2 -}$ , ${NO}_{3}^{-}$ and ${NH}_{4}^{+}$ ) and ${Ca}^{2 +}$ were the dominant WSIIs in PM_1.0, contributing about 89% to 95% of the total measured ions. The continental contributions of ${SO}_{4}^{2 -}$ , $K^{+}$ , and ${Ca}^{2 +}$ accounted for more than 60% during the whole period, while Na⁺ and ${Cl}^{-}$ were mainly from marine sources. The source identification showed that airport emissions were a major source at the sampling site and significantly contributed to the levels of sulfate, nitrate, and ammonium. Agricultural activities were the dominant sources impacting visibility in spring, while airport emissions and secondary inorganic aerosols were the main components affecting visibility in summer. Therefore, improving atmospheric visibility in coastal airport areas should focus on reducing the precursors of secondary particulates and reducing biomass-burning activities.
Cited by 2
Open Access
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Cited by 6
- 28 October 2024
- Published by MDPI AG in Toxics
Characterizing Aircraft Exhaust Emissions and Impact Factors at Tianjin Binhai International Airport via Open-Path Fourier-Transform Infrared Spectrometer
by Jingbo Zhao, Zixiang Mao, Bo Han, Zhiyong Fan, Simeng Ma, Jingxin Li, Rui Wang, Jian Yu
The growth of the civil aviation industry has raised concerns about the impact of airport emissions on human health and the environment. The aim of this study was to quantify the emissions of sulfur dioxide (SO₂), nitrogen oxides (NO_X), and carbon monoxide (CO) from in-service aircraft via open-path Fourier-transform infrared (OP-FTIR) spectroscopy at Tianjin Binhai International Airport. The results suggest that the CO and NO_X emission indices (EIs) for five common aircraft/engine combinations exhibited substantial discrepancies from those reported in the International Civil Aviation Organization (ICAO) databank. Notably, during the idling, approach, and take-off phases, the CO EIs exceeded the ICAO’s standard values by (11.04 ± 10.34)%, (56.37 ± 18.54)%, and roughly 2–5 times, respectively. By contrast, the NO_X EIs were below the standard values by (39.15 ± 5.80)%, (13.57 ± 3.67)%, and (21.22 ± 4.03)% in the same phases, respectively. The CO and NO_X EIs increased by 31–41% and decreased by 23–24%, respectively, as the ambient temperature decreased from −3 °C to −13 °C. This was attributed to lower temperatures reducing fuel evaporation, leading to inefficient combustion and increased CO emissions and lowering the combustion temperature and pressure, resulting in reduced NO_X emissions. The CO EIs had a positive correlation with humidity (adjusted R²: 0.715–0.837), while the NO_X EIs were negatively correlated with humidity (adjusted R²: 0.758–0.859). This study’s findings indicate that humidity is a crucial factor impacting aircraft exhaust emissions. Overall, this research will contribute to the development of scientifically informed emission standards and enhanced environmental management practices in the aviation sector.
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- 28 October 2024
- Published by MDPI AG in Toxics
Open Access
Characterizing Aircraft Exhaust Emissions and Impact Factors at Tianjin Binhai International Airport via Open-Path Fourier-Transform Infrared Spectrometer
by Jingbo Zhao, Zixiang Mao, Bo Han, Zhiyong Fan, Simeng Ma, Jingxin Li, Rui Wang, Jian Yu
The growth of the civil aviation industry has raised concerns about the impact of airport emissions on human health and the environment. The aim of this study was to quantify the emissions of sulfur dioxide (SO₂), nitrogen oxides (NO_X), and carbon monoxide (CO) from in-service aircraft via open-path Fourier-transform infrared (OP-FTIR) spectroscopy at Tianjin Binhai International Airport. The results suggest that the CO and NO_X emission indices (EIs) for five common aircraft/engine combinations exhibited substantial discrepancies from those reported in the International Civil Aviation Organization (ICAO) databank. Notably, during the idling, approach, and take-off phases, the CO EIs exceeded the ICAO’s standard values by (11.04 ± 10.34)%, (56.37 ± 18.54)%, and roughly 2–5 times, respectively. By contrast, the NO_X EIs were below the standard values by (39.15 ± 5.80)%, (13.57 ± 3.67)%, and (21.22 ± 4.03)% in the same phases, respectively. The CO and NO_X EIs increased by 31–41% and decreased by 23–24%, respectively, as the ambient temperature decreased from −3 °C to −13 °C. This was attributed to lower temperatures reducing fuel evaporation, leading to inefficient combustion and increased CO emissions and lowering the combustion temperature and pressure, resulting in reduced NO_X emissions. The CO EIs had a positive correlation with humidity (adjusted R²: 0.715–0.837), while the NO_X EIs were negatively correlated with humidity (adjusted R²: 0.758–0.859). This study’s findings indicate that humidity is a crucial factor impacting aircraft exhaust emissions. Overall, this research will contribute to the development of scientifically informed emission standards and enhanced environmental management practices in the aviation sector.
Cited by 6
Open Access
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Cited by 7
- 18 August 2024
- Published by MDPI AG in Toxics
Pollution Characteristics of Heavy Metals in PM₁ and Source-Specific Health Risks in the Tianjin Airport Community, China
by Jingbo Zhao, Jingcheng Xu, Yanhong Xu, Yaqin Ji
The airport and its surrounding areas are home to a variety of pollution sources, and air pollution is a recognized health concern for local populated regions. Submicron particulate matter (PM₁ with an aerodynamic diameter of <1 mm) is a typical pollutant at airports, and the enrichment of heavy metals (HMs) in PM₁ poses a great threat to human health. To comprehensively assess the source-specific health effects of PM₁-bound HMs in an airport community, PM₁ filter samples were collected around the Tianjin Binhai International Airport for 12 h during the daytime and nighttime, both in the spring and summer, and 10 selected HMs (V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) were analyzed. The indicatory elements of aircraft emissions were certified as Zn and Pb, which accounted for more than 60% of the sum concentration of detected HMs. The health risks assessment showed that the total non-cancer risks ( $T N C R s$ ) of PM₁-bound HMs were 0.28 in the spring and 0.23 in the summer, which are lower than the safety level determined by the USEPA, and the total cancer risk ( $T C R$ ) was 2.37 × 10⁻⁵ in the spring and 2.42 × 10⁻⁵ in the summer, implying that there were non-negligible cancer risks in the Tianjin Airport Community. After source apportionment with EF values and PMF model, four factors have been determined in both seasons. Consequently, the source-specific health risks were also evaluated by combining the PMF model with the health risk assessment model. For non-cancer risk, industrial sources containing high concentrations of Mn were the top contributors in both spring (50.4%) and summer (44.2%), while coal combustion with high loads of As and Cd posed the highest cancer risk in both seasons. From the perspective of health risk management, targeted management and control strategies should be adopted for industrial emissions and coal combustion in the Tianjin Airport Community.
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- 18 August 2024
- Published by MDPI AG in Toxics
Open Access
Pollution Characteristics of Heavy Metals in PM₁ and Source-Specific Health Risks in the Tianjin Airport Community, China
by Jingbo Zhao, Jingcheng Xu, Yanhong Xu, Yaqin Ji
The airport and its surrounding areas are home to a variety of pollution sources, and air pollution is a recognized health concern for local populated regions. Submicron particulate matter (PM₁ with an aerodynamic diameter of <1 mm) is a typical pollutant at airports, and the enrichment of heavy metals (HMs) in PM₁ poses a great threat to human health. To comprehensively assess the source-specific health effects of PM₁-bound HMs in an airport community, PM₁ filter samples were collected around the Tianjin Binhai International Airport for 12 h during the daytime and nighttime, both in the spring and summer, and 10 selected HMs (V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) were analyzed. The indicatory elements of aircraft emissions were certified as Zn and Pb, which accounted for more than 60% of the sum concentration of detected HMs. The health risks assessment showed that the total non-cancer risks ( $T N C R s$ ) of PM₁-bound HMs were 0.28 in the spring and 0.23 in the summer, which are lower than the safety level determined by the USEPA, and the total cancer risk ( $T C R$ ) was 2.37 × 10⁻⁵ in the spring and 2.42 × 10⁻⁵ in the summer, implying that there were non-negligible cancer risks in the Tianjin Airport Community. After source apportionment with EF values and PMF model, four factors have been determined in both seasons. Consequently, the source-specific health risks were also evaluated by combining the PMF model with the health risk assessment model. For non-cancer risk, industrial sources containing high concentrations of Mn were the top contributors in both spring (50.4%) and summer (44.2%), while coal combustion with high loads of As and Cd posed the highest cancer risk in both seasons. From the perspective of health risk management, targeted management and control strategies should be adopted for industrial emissions and coal combustion in the Tianjin Airport Community.
Cited by 7
Open Access
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Cited by 32
- 22 November 2022
- Published by MDPI AG in Atmosphere
The Vertical Distribution of VOCs and Their Impact on the Environment: A Review
by Da Chen, Yanhong Xu, Jingcheng Xu, Meiling Lian, Wei Zhang, Wenhao Wu, Mengying Wu, Jingbo Zhao
Volatile organic compounds (VOCs) play an important role in atmospheric chemistry. Primary VOCs take part in chemical and photochemical reactions, contributing to ozone (O₃) and secondary organic aerosol (SOA) formation, which may cause air pollution problems. High VOC concentrations might lead to dizziness, nausea, headaches, genotoxicity, reproductive weakness, and other diseases harmful to human health. Several studies have been performed to analyze the components, variations, or sources of VOCs at the ground level. In contrast, studies of the vertical distribution characteristics of VOCs are scarce, and the VOC potential for O₃ formation in the boundary layer is not yet well understood. To better understand the VOC vertical variation regularities and related reasons in temporal and spatial dimensions, thus to deepen the understanding of their effects on O₃ and SOA formation in the vertical direction and to identify the existing gaps in VOC vertical distributions, this study reviewed VOC sampling techniques, VOC vertical distribution characteristics, VOC diffusion models, and effects caused by VOCs. This work can be a valuable reference for decision making regarding environmental and health problems.
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- 22 November 2022
- Published by MDPI AG in Atmosphere
Open Access
The Vertical Distribution of VOCs and Their Impact on the Environment: A Review
by Da Chen, Yanhong Xu, Jingcheng Xu, Meiling Lian, Wei Zhang, Wenhao Wu, Mengying Wu, Jingbo Zhao
Volatile organic compounds (VOCs) play an important role in atmospheric chemistry. Primary VOCs take part in chemical and photochemical reactions, contributing to ozone (O₃) and secondary organic aerosol (SOA) formation, which may cause air pollution problems. High VOC concentrations might lead to dizziness, nausea, headaches, genotoxicity, reproductive weakness, and other diseases harmful to human health. Several studies have been performed to analyze the components, variations, or sources of VOCs at the ground level. In contrast, studies of the vertical distribution characteristics of VOCs are scarce, and the VOC potential for O₃ formation in the boundary layer is not yet well understood. To better understand the VOC vertical variation regularities and related reasons in temporal and spatial dimensions, thus to deepen the understanding of their effects on O₃ and SOA formation in the vertical direction and to identify the existing gaps in VOC vertical distributions, this study reviewed VOC sampling techniques, VOC vertical distribution characteristics, VOC diffusion models, and effects caused by VOCs. This work can be a valuable reference for decision making regarding environmental and health problems.
Cited by 32