Concentrations of PM0.1 and PM2.5 at high polluting event days in Ha Noi and the effects of meteorological conditions

Vo Thi Le Ha; Van Dieu Anh; Nguyen Thi Thu Hien; Dao Duy Nam; Nghiem Trung Dung; Ly Thuy Bich

doi:10.15625/2525-2518/16497

Author affiliations

Authors

Vo Thi Le Ha School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
Van Dieu Anh School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
Nguyen Thi Thu Hien School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
Dao Duy Nam School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
Nghiem Trung Dung School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
Ly Thuy Bich School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/16497

Keywords:

PM2.5, PM0.1, high pollution events, correlation, regression analysis

Abstract

. High levels of fine (PM_2.5) and ultrafine (PM_0.1) particles in the atmosphere can cause adverse effects on the environment and human health. This study aims at determining the mass concentrations of PM and meteorological influencing factors in high pollution event days in Hanoi. Daily samples of PM_2.5and PM_0.1were collected at a mixed site in Hanoi, Vietnam, from the middle of October to December 2020. High pollution events were determined based on PM_2.5concentrations and analyzed for its average concentration and intensity (number of days). The regression analysis and correlation matrix were determined by R software, version 4.04. Seven high pollution events were recorded for 2.5 sampling months. The daily PM_2.5 concentrations were in the range of 19 - 147 µg/m³. Those of PM_0.1 varied from 2 to 13 µg/m³ with an average of 6 µg/m³. The investigated meteorological factors can explain 70% PM_2.5variation but only 47% of PM_0.1 variations.

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