Evolution in physicochemical properties of fine particles emitted from residential coal combustion based on chamber experiment

Wu, Zhenxiao; Hu, Taotao; Hu, Wei; Shao, Longyi; Sun, Yuzhuang; Xue, Fanli; Niu, Hongyu

doi:10.1016/j.gr.2021.10.017

Cited by 12 publications

(6 citation statements)

References 63 publications

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“…NO 2 reduction and O 3 increase during the COVID-19 lockdown were also reported across most of China, yet the variation extents were different [41][42][43][44][45][46]. The decrease in NO 2 should mainly be attributed to the significant traffic reductions during the COVID-19 epidemic [41].…”

Section: Air Pollutantsmentioning

confidence: 74%

“…Secondary formation played important roles in PM 2.5 and O 3 formation during the COVID-19 lockdown, especially for the haze periods[11,40]. The reduction in PM 2.5 and the increase in O 3 emphasized the importance of PM 2.5 and O 3 synergetic control.NO 2 reduction and O 3 increase during the COVID-19 lockdown were also reported across most of China, yet the variation extents were different[41][42][43][44][45][46]. The decrease in NO 2 should mainly be attributed to the significant traffic reductions during the COVID-19 epidemic[41].…”

mentioning

confidence: 76%

“…In contrast to NO 2 reduction, O 3 increase was caused by less NO available to react with O 3 , as well as less heterogeneous HO 2 radical loss and higher actinic flux (i.e., photochemical formation from precursors such as VOCs) with lower particle concentration [41,44]. NO2 reduction and O3 increase during the COVID-19 lockdown were also reported across most of China, yet the variation extents were different [41][42][43][44][45][46]. The decrease in NO2 should mainly be attributed to the significant traffic reductions during the COVID-19 epidemic [41].…”

Section: Air Pollutantsmentioning

confidence: 94%

“…NO2 dropped the most, further It is worth noting that the SO 2 concentration during the COVID-19 period in 2020 was much lower than in 2019, especially in Stage I, III and IV, SO 2 decreased by 61.4%, 55.1% and 60.5% (Figure 5). This result may be related to the total coal consumption control (e.g., the replacement of coal with gas and electricity) implemented in Handan city, which reduced the amount of coal combustion and SO 2 emissions to a certain extent [4,45,46]. During the Chinese New Year period (Stage II), the peak values of PM 2.5 , NO 2 and CO in 2020 were higher than in 2019 (Figure 2), and PM 2.5 , NO 2 , CO and O 3 increased by 26.7%, 27.9%, 24.0% and 17.2%, respectively (Figure 5).…”

Section: Air Pollutantsmentioning

confidence: 99%

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Air Quality Changes during the COVID-19 Lockdown in an Industrial City in North China: Post-Pandemic Proposals for Air Quality Improvement

Niu

Zhang

et al. 2022

Sustainability

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To better understand the changes in air pollutants in an industrial city, Handan, North China, during the COVID-19 lockdown period, the air quality and meteorological conditions were recorded from 1 January to 3 March 2020 and the corresponding period in 2019. Compared to the corresponding period in 2019, the largest reduction in PM2.5–10, PM2.5, NO2 and CO occurred during the COVID-19 lockdown period. PM2.5–10 displayed the highest reduction (66.6%), followed by NO2 (58.4%) and PM2.5 (50.1%), while O3 increased by 13.9%. Similarly, compared with the pre-COVID-19 period, NO2 significantly decreased by 66.1% during the COVID-19 lockdown, followed by PM2.5–10 (45.9%) and PM2.5 (42.4%), while O3 increased significantly (126%). Among the different functional areas, PM2.5 and PM2.5–10 dropped the most in the commercial area during the COVID-19 lockdown. NO2 and SO2 decreased the most in the traffic and residential areas, respectively, while NO2 increased only in the township and SO2 increased the most in the industrial area. O3 increased in all functional areas to different extents. Potential source contribution function analysis indicated that not only the local air pollution lessened, but also long-distance or inter-regional transport contributed much less to heavy pollution during the lockdown period. These results indicate that the COVID-19 lockdown measures led to significantly reduced PM and NO2 but increased O3, highlighting the importance of the synergetic control of PM2.5 and O3, as well as regional joint prevention and the control of air pollution. Moreover, it is necessary to formulate air pollution control measures according to functional areas on a city scale.

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Section: Air Pollutantsmentioning

confidence: 74%

mentioning

confidence: 76%

Section: Air Pollutantsmentioning

confidence: 94%

Section: Air Pollutantsmentioning

confidence: 99%

See 2 more Smart Citations

Air Quality Changes during the COVID-19 Lockdown in an Industrial City in North China: Post-Pandemic Proposals for Air Quality Improvement

Niu

Zhang

et al. 2022

Sustainability

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“…Most studies have been focused on evaluating the nanomaterial's toxicity impacts, which leads to increasingly stringent policies. Consequently, experimental results suggest that particles fine-sized have more adverse effects [53].…”

Section: Toxicity Of Nanomaterialsmentioning

confidence: 99%

Toxicological Effects of Nanomaterials on the Aquatic Biota

Usman

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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Globally nanotechnology has transformed many sectors of human endeavour due to the innovative introduction of different unique materials and products in various areas. Presently large quantities of nanomaterials are synthesized and are essential for several industrial applications. This facilitates and enhances research in biophysics, biochemistry, wastewater treatment, etc. Nanotechnology and other science-related discipline have been combined to synthesize novel nanomaterials through modification of their shapes, composition, and dimension which can be used for various applications in medicines, agriculture, environmental remediation, etc. Despite their peculiar advantages and wide application in several industrials and domestic sectors, fabricated materials of nano-size scale have been raising concerns of unsafety for both human and aquatic biota, due to their incessant release into the aquatic ecosystem. These nanomaterials are ingested by the aquatic biota, from which they bioaccumulate in the organism’s body and hence pass to humans via the food chain. Within the organism’s body, nanomaterials serve as foreign material with different physicochemical characteristics because of their peculiar small sizes. Thus, the harmful effect of nanomaterials on aquatic biota has been generating great concern among the scientific communities. Thus, they can interfere with the normal mechanisms of physiological activities. The present chapter focuses on the sources of the nanomaterials in the aquatic ecosystem, the route of exposure, their process of transformation and interactions, their possible toxicity to the aquatic biota, challenges posed by the nanomaterials, and prospects.

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Source-specific risks assessment of size-resolved PM bound multiple toxicants: Variation of source-specific risks in respiratory tracts

Jia,

Li,

Zhang

et al. 2024

Atmospheric Pollution Research

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Evolution in physicochemical properties of fine particles emitted from residential coal combustion based on chamber experiment

Cited by 12 publications

References 63 publications

Air Quality Changes during the COVID-19 Lockdown in an Industrial City in North China: Post-Pandemic Proposals for Air Quality Improvement

Air Quality Changes during the COVID-19 Lockdown in an Industrial City in North China: Post-Pandemic Proposals for Air Quality Improvement

Toxicological Effects of Nanomaterials on the Aquatic Biota

Source-specific risks assessment of size-resolved PM bound multiple toxicants: Variation of source-specific risks in respiratory tracts

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