Impacts of the COVID-19 event on the NOx emissions of key polluting enterprises in China

He, Chao; Yang, Lele; Cai, Bofeng; Ruan, Qingyuan; Hong, Song; Wang, Zhen

doi:10.1016/j.apenergy.2020.116042

Cited by 47 publications

(26 citation statements)

References 39 publications

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“…The contraction was less pronounced in South Korea (−4.2%), Chile (−4.1%), and Australia (−2.1%). In China, the number of operating vents of key polluting enterprises decreased by −24.68% and the standardized NO x(w)5-day decreased by an average of −9.54 ± 6.00% due to COVID-19 ( He et al, 2021 ). Similar patterns have been observed in Italy, Spain, France, and India ( Sharma et al, 2020 ; Sicard et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Global, continental, and national variation in PM2.5, O3, and NO2 concentrations during the early 2020 COVID-19 lockdown

Hong

Zhang

et al. 2021

Atmospheric Pollution Research

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Lockdowns implemented in response to COVID-19 have caused an unprecedented reduction in global economic and transport activity. In this study, variation in the concentration of health-threatening air pollutants (PM 2.5 , NO 2 , and O 3 ) pre- and post-lockdown was investigated at global, continental, and national scales. We analyzed ground-based data from >10,000 monitoring stations in 380 cities across the globe. Global-scale results during lockdown (March to May 2020) showed that concentrations of PM 2.5 and NO 2 decreased by 16.1% and 45.8%, respectively, compared to the baseline period (2015–2019). However, O 3 concentration increased by 5.4%. At the continental scale, concentrations of PM 2.5 and NO 2 substantially dropped in 2020 across all continents during lockdown compared to the baseline, with a maximum reduction of 20.4% for PM 2.5 in East Asia and 42.5% for NO 2 in Europe. The maximum reduction in O 3 was observed in North America (7.8%), followed by Asia (0.7%), while small increases were found in other continents. At the national scale, PM 2.5 and NO 2 concentrations decreased significantly during lockdown, but O 3 concentration showed varying patterns among countries. We found maximum reductions of 50.8% for PM 2.5 in India and 103.5% for NO 2 in Spain. The maximum reduction in O 3 (22.5%) was found in India. Improvements in air quality were temporary as pollution levels increased in cities since lockdowns were lifted. We posit that these unprecedented changes in air pollutants were mainly attributable to reductions in traffic and industrial activities. Column reductions could also be explained by meteorological variability and a decline in emissions caused by environmental policy regulations. Our results have implications for the continued implementation of strict air quality policies and emission control strategies to improve environmental and human health.

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Section: Discussionmentioning

confidence: 99%

Global, continental, and national variation in PM2.5, O3, and NO2 concentrations during the early 2020 COVID-19 lockdown

Hong

Zhang

et al. 2021

Atmospheric Pollution Research

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“…The majority of studies mainly explored atmospheric environmental changes during the pandemic. The pandemic has led to production shutdowns and significant decreases in travel, thus significantly influencing pollution emissions and air quality ( Le et al, 2020 ; Han et al, 2020 ; Wang et al, 2020 ; He et al, 2021 ; Shen et al, 2021 ; Wang et al, 2021 ). For example, Liu et al estimated that global CO 2 emissions (1,551 metric tons) sharply decreased by 9% in the first half of 2020 compared with those in the same period of 2019 ( Liu et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

What medical waste management system may cope With COVID-19 pandemic: Lessons from Wuhan

Chen

Fang

et al. 2021

Resources, Conservation and Recycling

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The global pandemic caused by the 2019 coronavirus (COVID-19) has led to a dramatic increase in medical waste worldwide. This tremendous increase in medical waste is an important transmission medium for the virus and thus poses new and serious challenges to urban medical waste management. This study investigates the response of medical waste management to the COVID-19 pandemic and subsequent changes in Wuhan City based on the most detailed data available, including waste generation, storage, transportation, and disposal. The results show that despite a 5-fold increase in the demand for daily medical waste disposal in the peak period, the quick responses in the storage, transportation, and disposal sectors during the pandemic ensured that all medical waste was disposed of within 24 hours of generation. Furthermore, this paper discusses medical waste management during future emergencies in Wuhan. The ability of the medical waste management system in Wuhan to successfully cope with the rapid increase in medical waste caused by major public health emergencies has important implications for other cities suffering from the pandemic and demonstrates the need to establish resilient medical emergency systems in urban areas.

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“…Therefore, the aim of the article was to demonstrate the impact of changes in the lifestyle of European Union citizens, forced by the restrictions related to the pandemic, on the level of gaseous and solid air pollutants emissions. Similar studies related to the impact of the effects of COVID-19 on air pollutant emissions have been conducted by many researchers around the world [1][2][3][4][5][6][7][8]. However, such studies have not been conducted in the case of Poland and do not include the creation of scenarios considering a COVID-19 lockdown factor.…”

Section: Introductionmentioning

confidence: 99%

The Impact of the COVID-19 Pandemic on Gaseous and Solid Air Pollutants Concentrations and Emissions in the EU, with Particular Emphasis on Poland

Rybak

2021

Energies

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This article presents the research on the analysis of the impact of social isolation caused by the COVID-19 pandemic on gaseous air pollutant concentrations. For this purpose, the authors presented (thermal maps) and analyzed the concentrations of selected gases such as NO2, CO, SO2, and PM2.5 particles during the strict quarantine period in Poland and other EU countries. Statistical analysis of the concentration level of these gases was performed. It was noticed that in Poland, Germany, and France, the concentrations of such gases as CO, NO2, and PM2.5 particles decreased, while in Italy and Spain, the tendency was the opposite. To verify whether the discovered dependencies are not a natural continuation of the trends shaping the given phenomenon, the time series of gas and PM2.5 particle emissions were analyzed. On this basis, the emission forecast up to 2023 was created, using the ARIMA class models. The obtained results allowed to construct five scenarios for the development of NO2, CO, SO2, and PM2.5 emissions until 2023, considering the impact of the COVID-19 pandemic. It was stated that in the optimistic scenario, in 2023, a decrease in CO, NO2, and PM2.5 emissions could be achieved by maximums of 51%, 95%, and 28%, respectively.

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Impacts of the COVID-19 event on the NOx emissions of key polluting enterprises in China

Cited by 47 publications

References 39 publications

Global, continental, and national variation in PM2.5, O3, and NO2 concentrations during the early 2020 COVID-19 lockdown

Global, continental, and national variation in PM2.5, O3, and NO2 concentrations during the early 2020 COVID-19 lockdown

What medical waste management system may cope With COVID-19 pandemic: Lessons from Wuhan

The Impact of the COVID-19 Pandemic on Gaseous and Solid Air Pollutants Concentrations and Emissions in the EU, with Particular Emphasis on Poland

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