BROWSE

Related Researcher

Author's Photo

Choi, Sung-Deuk
Environmental Analytical Chemistry Lab (EACL)
Research Interests
  • Persistent organic pollutants, Environmental Analysis and monitoring, Multimedia modeling, Fine particle

ITEM VIEW & DOWNLOAD

Day-night variation and size distribution of water-soluble inorganic ions in particulate matter in Ulsan, South Korea

DC Field Value Language
dc.contributor.author Tien Van Do ko
dc.contributor.author Quang Tran Vuong ko
dc.contributor.author Choi, Sung-Deuk ko
dc.date.available 2021-02-04T07:50:40Z -
dc.date.created 2021-02-03 ko
dc.date.issued 2021-01 ko
dc.identifier.citation ATMOSPHERIC RESEARCH, v.247, pp.105145 ko
dc.identifier.issn 0169-8095 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/49929 -
dc.description.abstract In the present study, 11 size classes of particulate matter were collected from a semi-rural site in the industrial city of Ulsan, South Korea in 2019 to investigate the size distribution and day-night variation of water-soluble inorganic ions (WSIIs). Approximately 70% of the detected WSIIs were found in fine particles, with Na+, Ca (2+), Cl-, and NO3- dominant (similar to 70%) in coarse particles and SO42-, NO3-, and NH4+ (SNA) dominant (similar to 70%) in fine particles. Monthly variation in total WSIIs was observed, with the highest average concentration found in April for both coarse (2.71 mu g/m(3)) and fine particles (5.75 mu g/m(3)). Given that this month is characterized by prevailing southeasterly winds, these high levels may represent the adverse effects of industrial activity. Coefficients of divergence for individual WSIIs exhibited large variability, which is indicative of significant day-night differences in meteorology, chemistry, and source contributions. The size distributions of Na+, K+, F-, Cl-, NO3-, and SO42- were bimodal, while Mg2+, Ca2+, and NH4+ were unimodal. Peaks were generally found at 1.8-5.6 mu m and 0.18-0.56 mu m for coarse and fine particles, respectively. By plotting the linear relationship between the mole charge ratios of SNA, we found that coarse NO3- particles were mainly the result of heterogeneous reactions between HNO3 and sea salts or crustal species, while the homogeneous reaction of HNO3 and NH3 played a crucial role in the formation of fine NO3- particles. In conclusion, though day-night variation in WSIIs was apparent, especially in SNA, the formation pathways for both coarse and fine particles were similar for day and night. Based on the verification of the formation mechanisms for WSIIs at this semi-rural site, the influence of industrial activity on the secondary formation of PM in urban and industrial areas can be investigated further. ko
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE INC ko
dc.title Day-night variation and size distribution of water-soluble inorganic ions in particulate matter in Ulsan, South Korea ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85088095864 ko
dc.identifier.wosid 000586020600009 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.atmosres.2020.105145 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0169809520310814?via%3Dihub ko
Appears in Collections:
UEE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU