« Previous AbstractEmissions of Nanoparticles and Gaseous Material from 3D Printer Operation    Next AbstractAssociation between environmental pollutants and the FSH/AMH ratio as a marker of ovarian reserve »

Chemosphere

Title:		"Fifteen-year trends in carbon species and PM(2.5) in Seoul, South Korea (2003-2017)"
Author(s):		Kim Y; Yi SM; Heo J;
Address:		"Department of Environmental Health, Graduate School of Public Health, Seoul National University, Gwanak-ro Gwanak-gu, Seoul, 08826, Republic of Korea. Department of Environmental Health, Graduate School of Public Health, Seoul National University, Gwanak-ro Gwanak-gu, Seoul, 08826, Republic of Korea; Institute of Health and Environment, Seoul National University, 1 Gwanak Gwanak-ro Gwanak-gu, Seoul, 08826, Republic of Korea. Busan Development Institute, 955 Jungangdae-ro, Busanjin-gu, Busan, 47210, Republic of Korea. Electronic address: jbheo@bdi.re.kr"
Journal Title:		Chemosphere
Year:		2020
Volume:		20200721
Issue:
Page Number:		127750 -
DOI:		10.1016/j.chemosphere.2020.127750
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"This study focused on particulate matter (PM(2.5)) and carbon species in Seoul, South Korea, to quantitatively evaluate their long-term trends and assess the main correlating factors. Ambient PM(2.5) samples were collected over a 24 h period every third or sixth day from March 2003 to December 2017. The mean concentrations of PM(2.5), organic carbon (OC), elemental carbon (EC), primary and secondary OC (POC and SOC) in Seoul over 15 years were 32.2 mug/m(3) and 7.28 mug/m(3), 1.85 mug/m(3), 4.29 mug/m(3) and 3.54 mug/m(3) respectively. The long-term concentration trends in PM(2.5), OC, EC, POC, and SOC decreased significantly at rates of -2.09, -3.13, -6.31, -2.86, and -3.88 per year, respectively from 2003 to 2017 (p < 0.001), whereas the long-term trends in OC/EC significantly increased at a rate of 12.9/year (p < 0.001). These long-term decreases in PM(2.5) and carbon species concentrations were most pronounced in 2008 but almost disappeared from 2013 onwards. Considering the decrease in wind speed and variations in the concentration of gaseous air pollutants (carbon monoxide, sulfur dioxide, nitrogen dioxide, and volatile organic compounds) without a tendency to increase or decrease since 2013, secondary aerosol formation by atmospheric stagnation alleviated long-term decreases in PM(2.5) and carbon species concentrations. The long-term decreases in EC concentration were the most consistent and rapid, strongly suggesting that atmospheric policies related to mobile in South Korea were effective in reducing EC concentration. Future air quality management should focus on the secondary formation of air pollutants based on regional trends in air pollutant concentrations"
Keywords:		Aerosols Air Pollutants/*analysis/chemistry Air Pollution/*analysis Carbon/*analysis/chemistry Environmental Monitoring/*methods Particulate Matter/*analysis/chemistry Republic of Korea Seasons Seoul Sulfur Dioxide Time Factors Wind Carbon species Element;
Notes:		"MedlineKim, Youngkwon Yi, Seung-Muk Heo, Jongbae eng England 2020/07/28 Chemosphere. 2020 Dec; 261:127750. doi: 10.1016/j.chemosphere.2020.127750. Epub 2020 Jul 21"