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Chemical characteristics, source apportionment, and regional transport of marine fine particles toward offshore islands near the coastline of northwestern Taiwan Strait.
Environ Sci Pollut Res Int. 2018 Nov; 25(32):32332-32345.ES

Abstract

This study aims to investigate the spatiotemporal variation, chemical composition, and source apportionment of marine fine particles (PM2.5) as well as their regional transport toward the Matsu Islands located near the coastline of northwestern Taiwan Strait. Four offshore island sites located at the Matsu Islands were selected to conduct both regular and intensive sampling of marine PM2.5. Water-soluble ionic species, metallic elements, and carbonaceous contents were then analyzed to characterize the chemical characteristics of marine PM2.5. In order to identify the potential sources and their contributions to marine PM2.5, chemical mass balance (CMB) receptor model was employed along with the backward trajectory simulation to resolve the source apportionment of marine PM2.5 and to explore their transport routes in different seasons. The results showed that high PM2.5 concentrations were commonly observed during the northeastern monsoon periods. Additionally, marine PM2.5 concentration decreased from the west to the east with the highest PM2.5 at the Nankang Island and the lowest PM2.5 at the Donyin Island in all seasons, indicating an obvious concentration gradient of PM2.5 transported from the continental areas to the offshore islands. In terms of chemical characteristics of PM2.5, the most abundant water-soluble ions of PM2.5 were secondary inorganic aerosols (SO42-, NO3-, and NH4+) which accounted for 55-81% of water-soluble ions and 29-52% of marine PM2.5. The neutralization ratios of PM2.5 were always less than unity, indicating that NH4+ cannot solely neutralize nss-SO42+ and NO3- in marine PM2.5 at the Matsu Islands. Although crustal elements (Al, Ca, Fe, K, and Mg) dominated the metallic content of marine PM2.5, trace anthropogenic metals (Cd, As, Ni, and Cr) increased significantly during the northeastern monsoon periods, particularly in winter. Organic carbons (OCs) were always higher than elemental carbons (ECs), and the mass ratios of OC and EC were generally higher than 2.2 in all seasons, implying that PM2.5 was likely to be aged particles. During the poor air quality periods, major air mass transport routes were the northern transport and the anti-cyclonic circulation routes. Source apportionment results indicated that fugitive soil dusts and secondary aerosols were the major sources of marine PM2.5 at the Matsu Islands, while, in winter, biomass burning contributed up to 15% of marine PM2.5. This study revealed that cross-boundary transport accounted for 66~84% of PM2.5 at the Matsu Islands, suggesting that marine PM2.5 at the Matsu Islands has been highly influenced by anthropogenic emissions from neighboring Fuzhou City as well as long-range transport from Northeast Asia.

Authors+Show Affiliations

Institute of Environmental Engineering, National Sun Yet-sen University, Taiwan, Republic of China.Institute of Environmental Engineering, National Sun Yet-sen University, Taiwan, Republic of China. ycsngi@mail.nsysu.edu.tw.Institute of Environmental Engineering, National Sun Yet-sen University, Taiwan, Republic of China.Institute of Environmental Engineering, National Sun Yet-sen University, Taiwan, Republic of China.School of Geographic Science, Fujian Normal University, Fujian, China.Center for Marine Environmental Chemistry and Toxicology, College of Environment and Ecology, Xiamen University, Xiamen, China. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30229491

Citation

Chang, Cheng-Chih, et al. "Chemical Characteristics, Source Apportionment, and Regional Transport of Marine Fine Particles Toward Offshore Islands Near the Coastline of Northwestern Taiwan Strait." Environmental Science and Pollution Research International, vol. 25, no. 32, 2018, pp. 32332-32345.
Chang CC, Yuan CS, Li TC, et al. Chemical characteristics, source apportionment, and regional transport of marine fine particles toward offshore islands near the coastline of northwestern Taiwan Strait. Environ Sci Pollut Res Int. 2018;25(32):32332-32345.
Chang, C. C., Yuan, C. S., Li, T. C., Su, Y. L., Tong, C., & Wu, S. P. (2018). Chemical characteristics, source apportionment, and regional transport of marine fine particles toward offshore islands near the coastline of northwestern Taiwan Strait. Environmental Science and Pollution Research International, 25(32), 32332-32345. https://doi.org/10.1007/s11356-018-3093-9
Chang CC, et al. Chemical Characteristics, Source Apportionment, and Regional Transport of Marine Fine Particles Toward Offshore Islands Near the Coastline of Northwestern Taiwan Strait. Environ Sci Pollut Res Int. 2018;25(32):32332-32345. PubMed PMID: 30229491.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical characteristics, source apportionment, and regional transport of marine fine particles toward offshore islands near the coastline of northwestern Taiwan Strait. AU - Chang,Cheng-Chih, AU - Yuan,Chung-Shin, AU - Li,Tsung-Chang, AU - Su,Yen-Lung, AU - Tong,Chuan, AU - Wu,Shui-Ping, Y1 - 2018/09/18/ PY - 2018/01/12/received PY - 2018/08/28/accepted PY - 2018/9/20/pubmed PY - 2019/1/17/medline PY - 2018/9/20/entrez KW - Chemical characteristics KW - Marine fine particles (PM2.5) KW - Offshore islands KW - Regional transport KW - Spatiotemporal variation KW - Transportation routes SP - 32332 EP - 32345 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 25 IS - 32 N2 - This study aims to investigate the spatiotemporal variation, chemical composition, and source apportionment of marine fine particles (PM2.5) as well as their regional transport toward the Matsu Islands located near the coastline of northwestern Taiwan Strait. Four offshore island sites located at the Matsu Islands were selected to conduct both regular and intensive sampling of marine PM2.5. Water-soluble ionic species, metallic elements, and carbonaceous contents were then analyzed to characterize the chemical characteristics of marine PM2.5. In order to identify the potential sources and their contributions to marine PM2.5, chemical mass balance (CMB) receptor model was employed along with the backward trajectory simulation to resolve the source apportionment of marine PM2.5 and to explore their transport routes in different seasons. The results showed that high PM2.5 concentrations were commonly observed during the northeastern monsoon periods. Additionally, marine PM2.5 concentration decreased from the west to the east with the highest PM2.5 at the Nankang Island and the lowest PM2.5 at the Donyin Island in all seasons, indicating an obvious concentration gradient of PM2.5 transported from the continental areas to the offshore islands. In terms of chemical characteristics of PM2.5, the most abundant water-soluble ions of PM2.5 were secondary inorganic aerosols (SO42-, NO3-, and NH4+) which accounted for 55-81% of water-soluble ions and 29-52% of marine PM2.5. The neutralization ratios of PM2.5 were always less than unity, indicating that NH4+ cannot solely neutralize nss-SO42+ and NO3- in marine PM2.5 at the Matsu Islands. Although crustal elements (Al, Ca, Fe, K, and Mg) dominated the metallic content of marine PM2.5, trace anthropogenic metals (Cd, As, Ni, and Cr) increased significantly during the northeastern monsoon periods, particularly in winter. Organic carbons (OCs) were always higher than elemental carbons (ECs), and the mass ratios of OC and EC were generally higher than 2.2 in all seasons, implying that PM2.5 was likely to be aged particles. During the poor air quality periods, major air mass transport routes were the northern transport and the anti-cyclonic circulation routes. Source apportionment results indicated that fugitive soil dusts and secondary aerosols were the major sources of marine PM2.5 at the Matsu Islands, while, in winter, biomass burning contributed up to 15% of marine PM2.5. This study revealed that cross-boundary transport accounted for 66~84% of PM2.5 at the Matsu Islands, suggesting that marine PM2.5 at the Matsu Islands has been highly influenced by anthropogenic emissions from neighboring Fuzhou City as well as long-range transport from Northeast Asia. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/30229491/Chemical_characteristics_source_apportionment_and_regional_transport_of_marine_fine_particles_toward_offshore_islands_near_the_coastline_of_northwestern_Taiwan_Strait_ L2 - https://dx.doi.org/10.1007/s11356-018-3093-9 DB - PRIME DP - Unbound Medicine ER -