1.Assessment of Daytime and Nighttime Ground Level Ozone Pollution in Malaysian Urban Areas
Aimi Nursyahirah Ahmad ; Samsuri Abdullah ; Amalina Abu Mansor ; Nazri Che Dom ; Ali Najah Ahmed ; Nurul Ain Ismail ; Marzuki Ismail
Malaysian Journal of Medicine and Health Sciences 2023;19(No.6):242-248
		                        		
		                        			
		                        			Introduction: Ozone (O3
) is a significant component of photochemical smog as a typical secondary which is formed 
via nitrogen oxide photochemical interactions with volatile organic compounds (VOCs). This research discerns the 
complex influence of meteorological parameters and air pollutants influencing O3
 concentrations. Methods: Data 
were acquired from 1 January 2018 until 31 December 2020 that including ozone (O3
), nitrogen oxide (NOx), nitric 
oxide (NO), sulphur dioxide (SO2
), nitrogen dioxide (NO2
), carbon monoxide (CO), particulate matter (PM10, PM2.5), 
wind speed, solar radiation, temperature, and relative humidity (RH). Data were analysed using descriptive statistics 
in terms of line graphs. Results: The results demonstrate that the O3
 concentration peaked around 14:00 hours and 
dropped at night (20:00 hours) owing to the lack of sunshine and redox processes. Conclusion: In conclusion, ozone 
precursors played an important role in ozone formation and the findings of this research are valuable for policymakers and other interested parties
		                        		
		                        		
		                        		
		                        	
            

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