Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (1): 95-100.doi: 10.6040/j.issn.1672-3961.0.2019.001

• Chemistry and Environment • Previous Articles     Next Articles

Pollution characteristics and atmospheric transmission of PM2.5 and PM1.0 in Jinan city

Qi HUANG1(),Lingxiao YANG1,2,*(),Yanyan LI1,Pan JIANG1,Ying GAO3,Wenxing WANG1   

  1. 1. Environment Research Institute, Shandong University, Qingdao 266237, Shandong, China
    2. Jiangsu Collaborative Innovation Center for Climate Change, Nanjing 210023, Jiangsu, China
    3. School of Environmental Science and Engineering, Shandong University, Qingdao 266237, Shandong, China
  • Received:2019-01-03 Online:2020-02-20 Published:2020-02-14
  • Contact: Lingxiao YANG E-mail:515369992@qq.com;yanglingxiao@sdu.edu.cn
  • Supported by:
    国家自然科学基金资助项目(21307074);国家自然科学基金资助项目(21577079)

Abstract:

To study the characteristics of PM2.5 and PM1.0 in the North China Plain, atmospheric particulate samples were collected from October, 2014 to June, 2016 in Jinan urban area by using mid-volume samplers. Then we determined iron composition of Water-soluble inorganic ions with ion chromatography(IC)and carbonaceous component with thermal-optical transmittance (TOT) carbon aerosol analyzer. It was shown that the fine particle pollution of the atmosphere was serious in winter. The secondary ions SO42-, NO3- and NH4+ were the major water-soluble ions of PM2.5 and PM1.0, especially easily enriched in PM1.0. Compared with autumn and winter, concentrations of organic carbon(OC) and elemental carbon (EC) were much lower in spring and summer. The mass concentration of SOC, most of which was distributed in particles with particle size >1 μm, increased obviously in winter. Indicated by the 72 h backward trajectories, long-distance transmission from Hebei and Inner Mongolia, as well as local transmission from Shan- dong had an important influence on the ion mass concentration of PM2.5 and PM1.0 in the atmosphere of Jinan. The extinction coefficient of Jinan was up to 789.13 Mm-1 in winter. The extinction coefficient had a high correlation with secondary particles NH4+, SO42- and NO3- in PM2.5, which was the chief reason of the reduction in the visibility of the atmosphere.

Key words: PM2.5, PM1.0, water-soluble inorganic ions, carbon component, back trajectory, extinction coefficient

CLC Number: 

  • X513

Table 1

Mass concentration of main chemical components of PM2.5 and PM1.0 in Jinan urban area μg/m3"

季节 成分 ρ(SO42-) ρ(NO3-) ρ(Cl -) ρ(NH4+) ρ(Na+) ρ(K+) ρ(Mg2+) ρ(Ca2+) ρ(OC) ρ(EC) ρ(SOC)
春季 PM2.5 13.83±8.08 17.18±10.80 2.07±1.87 11.15±8.31 0.51±0.42 0.84±0.45 0.30±0.23 4.58±4.25 13.30±4.12 2.25±1.12 5.91±2.25
PM1.0 10.01±4.58 13.81±9.34 1.58±1.38 8.62±4.81 0.34±0.25 0.67±0.29 0.21±0.12 3.19±2.09 11.35±3.19 1.89±0.91 4.14±2.24
PM1.0/PM2.5 0.81±0.26 0.80±0.22 0.84±0.32 0.78±0.36 0.71±0.35 0.86±0.31 0.68±0.32 0.70±0.39 0.86±0.21 0.89±0.35 0.70±0.36
夏季 PM2.5 20.64±13.41 10.06±9.81 0.63±0.61 17.06±7.69 0.29±0.10 0.39±0.20 0.06±0.05 0.48±0.26 7.72±2.03 1.00±0.47 3.06±0.97
PM1.0 12.43±3.83 7.05±5.36 0.41±0.29 9.54±4.43 0.15±0.12 0.32±0.10 0.06±0.02 0.25±0.21 5.89±1.58 0.87±0.48 2.76±1.09
PM1.0/PM2.5 0.65±0.63 0.98±0.67 0.78±0.61 0.70±0.47 0.52±0.47 0.72±0.48 0.47±0.54 0.86±0.53 0.79±0.14 0.88±0.14 0.75±0.24
秋季 PM2.5 16.25±9.81 19.02±11.53 4.15±3.28 13.54±7.16 0.46±0.18 1.26±0.64 0.19±0.13 2.23±2.16 18.15±4.54 3.81±2.12 7.26±3.50
PM1.0 9.02±4.24 13.60±6.15 2.42±1.32 8.17±4.41 0.27±0.12 0.80±0.38 0.10±0.08 1.49±0.96 10.09±5.01 1.57±0.84 3.27±1.94
PM1.0/PM2.5 0.61±0.24 0.75±0.25 0.67±0.25 0.61±0.23 0.60±0.22 0.66±0.24 0.43±0.26 0.42±0.23 0.65±0.16 0.76±0.16 0.48±0.20
冬季 PM2.5 15.32±9.31 19.06±9.79 3.93±3.17 13.28±6.36 0.31±0.17 1.15±0.64 0.23±0.17 5.78±3.82 19.06±9.79 4.62±2.19 16.91±7.00
PM1.0 8.39±3.65 14.01±8.01 2.15±1.91 7.21±1.98 0.17±0.12 0.60±0.20 0.18±0.09 2.45±1.31 10.57±5.42 2.61±1.21 2.56±2.06
PM1.0/PM2.5 0.56±0.59 0.76±0.63 0.59±0.57 0.57±0.70 0.61±0.66 0.76±0.75 0.89±0.38 0.44±0.31 0.51±0.36 0.60±0.14 0.15±0.09

Table 2

ρ(NO3-)/ρ(SO42-) ratios in PM2.5 and PM1.0 of Jinan city"

季节 PM2.5 PM1.0 季节均值
1.39±0.80 1.34±0.51 1.37±0.66
0.46±0.32 0.52±0.33 0.49±0.33
1.33±0.56 1.68±0.59 1.51±0.58
1.33±0.36 1.79±0.48 1.56±0.42
年均 1.13±0.51 1.33±0.48 1.23±0.50

Fig.1

Seasonal variation of OC and EC′s correlation in atmospheric PM2.5 and PM1.0 in urban area of Jinan"

Fig.2

Cluster concentration analysis of 72 hours backward trajectories in Jinan during sampling period"

Fig.3

Seasonal variation of extinction coefficient"

Fig.4

Contribution of various components in PM2.5 to extinction coefficient"

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Study on the water-soluble ions in fine particle matter and the long-range transport of air masses in the city Jinan

[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(4): 98-103 .
[6] . Study on water-soluble ions in fine particle matter and long-range transport of air masses at Jinan, China [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(4): 0-0 .
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