A study on variations of concentrations of particulate matter with different sizes in Lanzhou, China

Wang, Shigong; Feng, Xia; Zeng, Xiaoqing; Ma, Yanhui; Shang, Kezheng

doi:10.1016/j.atmosenv.2009.02.021

Cited by 103 publications

(60 citation statements)

References 6 publications

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“…It ranked as the most polluted city among the provincial capital cities in China and the levels of air pollution were 6 times higher than the WHO annual average guide value (20 μg/m 3 ) in 2009 (Zhang et al, 2014). There have been several studies about chemical species of PM 2.5 in Lanzhou (Pathak et al, 2009;Wang et al, 2009;Yang et al, 2011;Fan et al, 2014). Until now, no measurements of atmospheric HULIS have been reported in Lanzhou.…”

Section: Introductionmentioning

confidence: 99%

Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China

Tan

Xiang

Zhou

et al. 2016

Science of The Total Environment

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Evaporative light scattering detection (ELSD) was applied to quantify HULIS (humic-like substances) for the first time in 2012 winter and 2013 summer at an urban site in Lanzhou. Water soluble organic carbon (WSOC), water soluble inorganic ions, and carbonaceous species (OC/EC) were also analyzed. The results show that OM (Organic Matter = OC × 1.6, constituting 45.8% to PM 2.5 ) was the most abundant species, followed by SNA (SO 4 2− + NO 3 − + NH 4 + , constituting 23.4% to PM 2.5 ). The chemical species were in the order of:The annual average concentration of HULIS was 4.70 μg/m −3 and HULISc (carbon content of HULIS) contributed 6.19% to PM 2.5 and 45.6% to WSOC, indicating that HULIS was the most important components of WSOC. The concentration of HULIS was 2.14 ± 0.80 μg/m 3 in summer and 7.24 ± 2.77 μg/m 3 in winter,respectively. The concentrations of HULIS were relatively low and stable in summer, while high and varied dramatically in winter. The abundance of HULISc in WSOC shows a more concentrated distribution in Lanzhou, with a range between 0.28-0.57. The ratios of HULIS/K + were 6.25 ± 1.41 and 6.14 ± 1.96 in summer and winter, respectively, suggesting there were other significant sources in addition to biomass burning emissions. HULIS and WSOC exhibited similar seasonal variation and had a strong positive correlation. In addition to the good relationship (0.89) between HULIS and Cl − in winter, the great enhancement of HULIS with significantly high Cl − and relatively low K + in winter indicated that residential coal burning was probably an important HULIS source in Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v winter. Correlation and back trajectory analysis suggested that biomass burning and secondary formation were also important HULIS sources and the contribution of HULIS from dust could be neglected. Adverse meteorological conditions were also important factors for the accumulation of HULIS in winter.

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Section: Introductionmentioning

confidence: 99%

Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China

Tan

Xiang

Zhou

et al. 2016

Science of The Total Environment

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“…Respiratory diseases are also hazardously attributed to PM 10 (14)(15)(16). In recent years, because of the middle eastern dust (MED) storms, especially from the Arabian Peninsula and Iraq, the areas of south, west and southwestern Iran have been affected by exposure to PM 10 . MED storms have led to thousands of hospital admissions for cardiovascular and respiratory diseases (17)(18)(19).…”

Section: Introductionmentioning

confidence: 99%

“…PM with aerodynamic diameters of less than or equal to 10 μm (PM 10 ) has the greatest adverse impact on human health (12,13). Epidemiological studies have shown that more than 500,000 Americans die each year due to cardiovascular diseases associated with PM 10 . Respiratory diseases are also hazardously attributed to PM 10 (14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

“…Epidemiological studies have shown that more than 500,000 Americans die each year due to cardiovascular diseases associated with PM 10 . Respiratory diseases are also hazardously attributed to PM 10 (14)(15)(16). In recent years, because of the middle eastern dust (MED) storms, especially from the Arabian Peninsula and Iraq, the areas of south, west and southwestern Iran have been affected by exposure to PM 10 .…”

Section: Introductionmentioning

confidence: 99%

“…Among ambient air pollutants, particulate matter (PM) is the pollutant with the most undesired adverse effects on human health (8). Many studies have reported the strong correlation between PM concentrations and hospital admissions due to the chronic or acute respiratory and cardiovascular diseases (9)(10)(11). PM with aerodynamic diameters of less than or equal to 10 μm (PM 10 ) has the greatest adverse impact on human health (12,13).…”

Section: Introductionmentioning

confidence: 99%

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Air Quality and Health Risks Associated With Exposure to Particulate Matter: A Cross-Sectional Study in Khorramabad, Iran

et al. 2016

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Background: Among ambient air pollutants, particulate matter (PM) has the most undesired adverse effects on human health. Many studies have reported that there is a strong correlation between PM concentrations and hospital admissions due to chronic or acute respiratory and cardiovascular diseases. Objectives: The aims of this study were to evaluate the relationship between air quality and health endpoints of PM 10 in Khorramabad, Iran. Materials and Methods:The PM 10 sampling was carried out with a high-volume sampler at a flow rate of 1.1 -1.4 m 3 /min from January through December 2014. Meteorological data was also collected and evaluated. The total mortality and morbidity rates were calculated using the AirQ2.2.3 software model. Results:The highest concentrations of PM 10 were obtained in July, with the mean concentration of 136.48 µg/m 3 . Eastern and southeastern winds are the prevailing and semi-prevailing winds in Khorramabad. The worst air quality was also observed in July. The total mortality rate during the study was estimated to be 320 persons. Conclusions: In order to diminish the health impacts of particulate matter in Khorramabad, health training for the public, especially for persons with chronic lung and heart diseases, the elderly, and children, should be conducted by health systems to encourage them to reduce their activities during dusty days.

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Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

Ling

Guo

2014

J. Geophys. Res. Atmos.

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Loess Plateau is one of the dust aerosol source regions featured by its sandy underlying surface and affected significantly by dust events. In order to investigate climatic forcing of dust aerosols in semiarid region, continuous observations of particulate matter (PM 10 concentration), meteorological elements, and energy fluxes were collected at Semiarid Climate Observatory and Laboratory in northwestern China from March to May during 2007-2010. The result shows that dusty days are often evoked under the condition when a strengthening trough is combined with the development of strong convection. During dusty days, the frequency of northerly winds increases significantly with the average wind velocity to be around 4.0 m/s; temperature is low during the daytime and high at nighttime. Relative humidity and surface pressure, however, are about 15% and 70% lower than average in dusty days, respectively. Energy balance closure is typically poor in dusty days. During daytime, the downward/upward solar radiation at land surface is less in dusty days than in nondusty days with the largest difference of 206.7 W/m 2 and 33.25 W/m 2 , respectively. Difference in downward longwave radiation between dusty and nondusty days is 35 W/m 2 , accounting for 11.7% and 14% of the daily mean for dusty and nondusty days, respectively. The net radiation flux, as well as sensible/latent heat fluxes at surface is smaller during the daytime but larger at nighttime in dusty days. The maximum differences of sensible/latent heat fluxes between dusty and nondusty days can reach for 41.9% and 12.1% of the maximum net radiation, respectively.

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A study on variations of concentrations of particulate matter with different sizes in Lanzhou, China

Cited by 103 publications

References 6 publications

Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China

Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China

Air Quality and Health Risks Associated With Exposure to Particulate Matter: A Cross-Sectional Study in Khorramabad, Iran

Composite analysis of impacts of dust aerosols on surface atmospheric variables and energy budgets in a semiarid region of China

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