[Pollution Characteristics and Source Apportionment of Fine Particulate Matter in Autumn and Winter in Puyang, China]

Chu Chen; Ti-Jian Wang; Yuan-Hao Li; Hong-Lei Ma; Pu-Long Chen; De-Yi Wang; Yuan-Xun Zhang; Qi Qiao; Guang-Ming Li; Wen-Hong Wang

doi:10.13227/j.hjkx.201901119

[Pollution Characteristics and Source Apportionment of Fine Particulate Matter in Autumn and Winter in Puyang, China]

Huan Jing Ke Xue. 2019 Aug 8;40(8):3421-3430. doi: 10.13227/j.hjkx.201901119.

[Article in Chinese]

Authors

Affiliations

¹ School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China.
² Puyang Environmental Monitoring Station, Puyang 457000, China.
³ College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

PMID: 31854746
DOI: 10.13227/j.hjkx.201901119

Abstract

As one of the air pollution transmission channels around the beijing-Tianjin-Hebei region, Puyang frequently suffer from severe airpollution in autumn and winter. In order to study the characteristics and main sources of fine particulate matter during these periods, manual membrane sampling of PM_2.5 was conducted at three national control sites from October 15, 2017, to January 13, 2018. Chemical composition analysis was conducted and, combined with a PMF receptor model, source analysis of the fine particles was also undertaken. The results show that the average mass concentration of PM_2.5 in Puyang was 94.16 μg·m^-3 in the autumn and winter of 2017, and Pushuihe station was the most polluted site. During the heating season, the three control stations all recorded the frequent occurrence of severe and serious pollution events, while the frequency of mild pollution events decreased. When heavy pollution events occurred, the concentrations of NO₂ and CO increased significantly. The main components of PM_2.5 were water-soluble ions (52.33%), OCEC (25.32%), and crustal elements (0.08%). The concentrations of NO₃^- were high while the concentrations of SO₄^2- were low. When heavy pollution occurred, the concentrations of water-soluble ions, OC, EC, and K in PM_2.5 increased significantly, while the concentrations of crustal elements decreased. During the sampling period, the conversion ratios of sulfur and nitrogen in Puyang were high and atmospheric oxidation was strong. The transformation of sulfur and nitrogen promoted the occurrence of heavy pollution. Emissions of NO_x, CO, and VOCs were higher in Puyang in 2017, and the source apportionment results showed that the main sources of PM_2.5 in autumn and winter were secondary inorganic salts (37%), industrial sources (16%), secondary organic aerosol (SOA, 14%), biomass combustion (12%), mobile sources (9%), coal burning (7%), and dust (4%). Secondary transformation played an important role in the development of heavy pollution events in Puyang. It is necessary to focus on the control of emissions from industrial sources, biomass combustion, moving source, and civil coal combustion.

Keywords: autumn and winter; fine particulate matter; heavy pollution; receptor model; source apportionment.

Publication types

English Abstract