Abstract
This study looked at the variation in air quality during the periods of fireworks as assessed from the change in ambient concentrations of air pollutants like particulate matter (PM10), O3, and NO2 for pre-, post-, and Vishu days for four consecutive years in 2015, 2016, 2017, and 2018 in Kannur, India. Enhanced levels of O3, NO2, NO, and PM10 were observed during the intense usage of fireworks. The concentration of metals in PM10 increased and the percent increase was found to be different for metal traces. A pronounced increase in the aerosol optical depth (AOD) in the lower wavelength region of solar radiation reveals the abundance of fine mode particles. The concentrations of O3 and NO2 were observed to increase by more than 100% on Vishu day than the control days for the observational period. Simulation using the National Center for Atmospheric Research (NCAR) Master Mechanism photochemical box model indicates a more than 100% enhancement in NO2 photolysis rates during the fireworks episode, which leads to a 100% increase in the surface ozone production. Observations as well as model simulations indicate that the enhanced photochemical ozone production from NO2 photolysis is possibly the main driver of ozone production during the Vishu at this site. The air quality index (AQI) revealed the deterioration of air quality at the observational site during the period of Vishu.
Highlights
Air pollution, whether by toxic chemicals or biological materials, severely affects human health [1,2]
The concentrations of metals in present PM10 was found to have increased and the percentage of increase varied from metal to metal
PM10, and trace metals revealed elevated concentrations location in Kerala’s coastal belt with high humidity inofthe summer season, in which Vishu is of these pollutants in the atmosphere
Summary
Whether by toxic chemicals or biological materials, severely affects human health [1,2]. PM contains trace elements such as As, Cd, Co, Cr, Ni, Pb, and Se, their influence on atmospheric dynamics and on the health impacts of trace metals released from which are harmful to human beings animals even in trace amounts [40] Increases in the concentrations of air pollutants as well emitted from fireworks displays can cause injurious effects on human health, especially to children as toxic such as PM, black carbondays,. In the research includes a quantitative analysis of metal concentrations present in particulate matter and addition, it aims calculate the air quality index over Kannur during Vishu to categorize it the rate of change of O3 on a diurnal scale during fire bursting episodes. Calculate the air quality index over Kannur during Vishu to categorize it according to the pollution load
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