文章基本信息

标题：Health Benefits Due to Reduction in RespirableParticulates during COVID-19 Lockdown in India
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作者：Anubha Goel ; Pallavi Saxena ; Saurabh Sonwani 等
期刊名称：Aerosol and Air Quality Research
印刷版ISSN：1680-8584
出版年度：2021
卷号：21
期号：5
页码：1-16
DOI：10.4209/aaqr.200460
语种：English
出版社：Chinese Association for Aerosol Research in Taiwan
摘要：To control the spread of the coronavirus (COVID-19) pandemic, the Government of Indiaimposed various phases of lockdown starting from the third week of March 2020. Improvementin city air quality has emerged as a benefit of this lockdown in India. The objective of this paperis to quantify the health benefits due to this lockdown. PM2.5 concentrations in nonattainmentcities (NACs) in Uttar Pradesh and the Delhi-National Capital Region (NCR) in North India werestudied. Data from prelockdown and the various lockdown phases were compared, with 2019 asa benchmark. Compared with those in 2019, the PM2.5 concentrations during lockdown Phase 1were approximately 44.6% lower for cities in Uttar Pradesh and approximately 58.5% lower forthe Delhi-NCR. The health impacts of particle inhalation were quantified using the multiple-pathparticle dosimetry and AirQ+ models, which revealed that the most considerable improvementwas during lockdown Phase 1. Among the prelockdown and lockdown phases, Phase 1 exhibitedthe minimum PM2.5 concentration and thus the greatest health benefits. For the selected cities,the concentration of particle deposition in the tracheobronchial region of human lungs showedits maximum reduction during lockdown Phase 1(30.14%). Furthermore, the results highlighteda decrease of 29.85 deaths per 100,000 persons during lockdown Phase 1, primarily due to thereduction in PM2.5 concentrations. This quantification of the health benefits due to a decrease inPM2.5 may help policymakers implement suitable control measures, especially for NACs, wherethe respirable particulate matter concentrations remain very high.
关键词：PM25;Nonattainment city;AirQ+;COVID-19;Health benefit quantification