Journal of Shanghai University(Natural Science Edition) ›› 2018, Vol. 24 ›› Issue (3): 437-445.doi: 10.12066/j.issn.1007-2861.1809

• Research Paper • Previous Articles     Next Articles

Concentration and sources of WSON in $PM_{2.5}$ in Jinhua

ZHAO Boyang1, XIANG Chenglong2, CHEN Huanbing1, CHANG Yi1, FENG Jialiang1()   

  1. 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
    2. Jinhua Environmental Monitoring Center, Jinhua 321000, Zhejiang, China
  • Received:2016-05-25 Online:2018-06-15 Published:2018-06-28
  • Contact: FENG Jialiang E-mail:fengjialiang@shu.edu.cn

Abstract:

Nitrogen-containing components account for an important part of the fine particulate matter (PM$_{2.5})$, and many of the nitrogen-containing compounds are in organic form. Nitrogen-containing organics have great potential adverse impacts on the land and water ecosystem. Seasonal PM$_{2.5}$ samples were collected from spring to autumn in 2015 in Jinhua. Concentration and seasonal variation of water-soluble organic nitrogen (WSON) in the samples were analyzed. Concentration of WSON in PM$_{2.5}$ in Jinhua ranged from 0.06 to 6.90 $\mu $g/m$^{3}$ with an average of 1.90 $\mu $g/m$^{3}$, accounted for 31 % of the water-soluble total nitrogen (WSTN). Distinct seasonal variation in the concentration of WSON was found in Jinhua, with higher concentrations in autumn and spring, and the lowest in summer. On the contrary, contribution of WSON to WSTN in summer was higher than that in other seasons. The main sources of WSON in PM$_{2.5}$ in Jinhua should be the secondary formation in the atmosphere from the nitrogen-containing precursors and biomass burning emission.

Key words: water-soluble organic nitrogen (WSON), water-soluble ion, PM$_{2.5}$, source identification, Jinhua

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