Study on Air Quality Index, Atmospheric Pollutants and Dry Deposition of PCDD/Fs in the Ambient Air near Southwest China

Liu, Xueyan; Cui, Kangping; Hsieh, Yen-Kung; Wang, Ya-Fen; Wang, Ruoxin

doi:10.4209/aaqr.220160

Cited by 2 publications

(2 citation statements)

References 47 publications

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“…In this study, the dry deposition flux of PCDD/Fs was calculated using the technique provided by Liu's study (Liu et al, 2022), and the necessary parameters were acquired using methods used in previous research (Shih et al, 2006).…”

Section: Pcdd/f Concentrationmentioning

confidence: 99%

Effects of Precipitation on the Air Quality Index, PM2.5 Levels and on the Dry Deposition of PCDD/Fs in the Ambient Air

Wang¹,

Cui²,

Sheu³

et al. 2023

Aerosol Air Qual. Res.

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The effects of 9 precipitation events in Suzhou City in Anhui Province, China, on the air quality index (AQI), PM2.5, and dry deposition flux of PCDD/Fs (polydibenzo-p-dioxins and polydibenzofurans) were investigated. A total of 7 precipitation events were positive contributes to the reduction of AQI; among them, the AQI were between 23 and 216, with an average of 75, the PM2.5 concentrations were between 5.0 and 169 µg m -3 , with an average of 25 µg m -3 , while the total-PCDD/F-TEQ dry deposition flux ranged from 149 to 1034 pg WHO2005-TEQ m -2 day -1 and averaged 315 pg WHO2005-TEQ m -2 day -1 . By comparing the average AQI and PM2.5, respectively, during and after rainfall with that before rainfall, the results indicated that the average reduction fractions of AQI were 26% and 44%, respectively, while those of PM2.5 were 58% and 43%. In addition, the effect of precipitation on the average reduction fraction of total PCDD/F-TEQ dry deposition flux was 31%. However, in the other 2 AQI elevation events, the AQI were between 23 and 100, and averaged 51; when comparing the average AQI and PM2.5 concentrations, during and after the rain with that before the rain, the increases in AQI were 42% and 49%, respectively, while the increases in PM2.5 concentration were 26% and 29%, respectively. The above results show that, on the whole, rain and snow improved the air quality. This is because rainwater removes particles or dissolved gaseous pollutants from the atmosphere and brings aerosols to the ground. However, in some cases, the increase of source emissions and atmospheric vertical convection, the effect of precipitation or air humidity increased the AQI and elevated the concentration of PM2.5, and dry deposition flux of PCDD/Fs. The results of this study provide useful information for both scientific communities and air quality management.

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Section: Pcdd/f Concentrationmentioning

confidence: 99%

Effects of Precipitation on the Air Quality Index, PM2.5 Levels and on the Dry Deposition of PCDD/Fs in the Ambient Air

Wang¹,

Cui²,

Sheu³

et al. 2023

Aerosol Air Qual. Res.

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“…Among the pollutants of motor vehicle exhaust, CO makes the largest contribution to motor vehicle exhaust. NO2 is the most toxic of the NOx and can form photochemical smog (Zamorategui-Molina et al, 2021;Biswas et al, 2021;Liu et al, 2022). These harmful gases diffuse into the air will cause air pollution and harm the human body.…”

Section: Introductionmentioning

confidence: 99%

Impact of Motor Vehicle Exhaust on the Air Quality of an Urban City

Wang

Wang²,

Liu³

et al. 2022

Aerosol Air Qual. Res.

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The development of the economy and the prosperity of the industry have not only promoted the great progress of motor vehicle industry, but also made the number of motor vehicles in large and medium cities increase rapidly. In recent years, with the increasing number of urban motor vehicles, the environmental pollution caused by motor vehicle exhaust on both sides of the road has become increasingly serious. The high concentration of pollutants emitted by motor vehicles will seriously affect and threaten the health of pedestrians on both sides of the road and surrounding residents. In this work, the environmental monitoring data (NO2) from different areas of Jinan city over different time periods were summarized from 2001 to 2007. It was found that the NO2 concentration in the ambient air of Jinan gradually decreased due to the treatment of motor vehicles taken in Jinan for the 29 th Olympic Games in 2005, the NO2 concentration during the urban heating period fell by nearly 70%, and the air during the urban heating period was significantly higher than that in the non-heating period. In 2004, the concentration of NO2 in the air during the urban heating period was nearly twice as high as during the non-heating period. Taking the city of Jinan, China in 2008 as an example, the contribution of motor vehicle emissions to the ambient air quality in Jinan, especially CO and NO2, was investigated through real-time monitoring of pollutants emitted by motor vehicles on several main roads in Jinan. The results showed that the pollutants emitted by motor vehicles in Jinan, especially CO and NO2, contribute greatly to the ambient air quality of Jinan. Among them, the highest average CO concentration was measured beside Jingqi Road, which was attributed to poor vehicle driving conditions and low speeds due to congestion on Jingqi Road. The necessary motor vehicle exhaust control measures were proposed.

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Study on Air Quality Index, Atmospheric Pollutants and Dry Deposition of PCDD/Fs in the Ambient Air near Southwest China

Cited by 2 publications

References 47 publications

Effects of Precipitation on the Air Quality Index, PM2.5 Levels and on the Dry Deposition of PCDD/Fs in the Ambient Air

Effects of Precipitation on the Air Quality Index, PM2.5 Levels and on the Dry Deposition of PCDD/Fs in the Ambient Air

Impact of Motor Vehicle Exhaust on the Air Quality of an Urban City

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