台湾彭佳屿岛春季TSP中水溶性离子源解析

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Abstract In spring of 2010, sixty total suspended particulate (TSP) samples we collected in Pengjia Islet, northern sea of Taiwan, China. The concentrations of water-soluble ions (Na⁺, Mg²⁺, Ca²⁺, K⁺, NH₄⁺, Cl^-, SO₄^2- and NO₃^-) in the TSP samples were extracted and then determined using an Ion Chromatography. Using these data, we investigated the sources of water-soluble ions by a multiple-technique analysis combining with the HYSPLIT model, ion stoichiometry, correlation analysis of water-soluble ions and primary component analysis. According to a decreasing order in the average mass concentration, these ions ranked as SO₄^2- (7.70±4.53)μg/m³, Cl^- (6.17±3.85)μg/m³, Na⁺ (4.59±2.28)μg/m³, NO₃^- (4.24±3.07)μg/m³, NH₄⁺ (1.53±1.20)μg/m³, Ca²⁺ (0.95±1.47)μg/m³, Mg²⁺ (0.59±0.30)μg/m³ and K⁺ (0.31±0.17)μg/m³. The sea water was identified as the dominant source for Cl^-, Na⁺ and Mg²⁺. Besides the contribution from the sea salt, the K⁺ had other sources, such as coal and biomass burning, and mineral etc. 60% Ca²⁺ came from the local construction dust, while 77% SO₄^2- originated from coal and biomass burning. The NO₃^- dominantly sourced from the vehicle exhaust, coal and biomass burning, while NH₄⁺ totally originated from the second inorganic aerosol and biomass burning. By combining our results with previous findings, in spring, the concentrations of Cl^-, Na⁺ and Mg²⁺ in TSP increased gradually from the Northeast of China to the Northwest Pacific Ocean; on the contrary, the Ca²⁺, K⁺, NH₄⁺, SO₄^2- and NO₃^- in TSP decreased gradually. The spatial characteristics of different water-soluble ions in TSP were associated with their long-range transport in the marine boundary layer.

Key words： Taiwan Pengjia Islet TSP water-soluble ions source apportionment

Received: 22 May 2017

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	LUO Li
	GAO Shu-Ji
	XIAO Hua-Yun
	XIAO Hong-Wei
	WANG Yan-Li

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LUO Li,GAO Shu-Ji,XIAO Hua-Yun等. Source apportionment of water-soluble ions in spring TSP of Pengjia Islet, Taiwan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4452-4459.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4452

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