Preprint Article Version 1 This version is not peer-reviewed

The Concentrations and Removal Efficiency of PM10 and PM2.5 on Wetland in Beijing

Version 1 : Received: 20 January 2019 / Approved: 22 January 2019 / Online: 22 January 2019 (11:06:49 CET)

How to cite: Li, C.; Huang, Y.; Guo, H.; Wu, G.; Wang, Y.; Li, W.; Cui, L. The Concentrations and Removal Efficiency of PM10 and PM2.5 on Wetland in Beijing. Preprints 2019, 2019010211 (doi: 10.20944/preprints201901.0211.v1). Li, C.; Huang, Y.; Guo, H.; Wu, G.; Wang, Y.; Li, W.; Cui, L. The Concentrations and Removal Efficiency of PM10 and PM2.5 on Wetland in Beijing. Preprints 2019, 2019010211 (doi: 10.20944/preprints201901.0211.v1).

Abstract

Particulate matter is a severe source of atmospheric pollution in urban cities, and it has adverse effects on human health. This study was conducted during the whole year of 2016 to monitor the concentrations of PM10 and PM2.5 on the Beijing Hanshiqiao wetland and bare land in Beijing to analyze their correlations with meteorological factors and compare the removal efficiency between two land surface types. The results indicated that (1) the PM10 and PM2.5 concentrations on the bare land were higher than those on wetland as a whole, reaching the highest value both at night and dusk and the lowest value near noon. The average concentration of PM10 was higher in winter (wetland: 137.48 μg·m-3; bare land: 164.75 μg·m-3) and spring (wetland: 205.18 μg·m-3; bare land: 244.85 μg·m-3) and the concentration of PM2.5 on the wetland also reached the higher value in winter and spring with the average of 84.52 μg·m-3 and 98.98 μg·m-3, whereas, it was higher in spring and summer on the bare land; (2) concentrations of PM10 and PM2.5 were significantly positively affected by the relative humidity (P < 0.01) and negatively influenced by wind speed (P < 0.05). The relationship between PM10 and PM2.5 concentrations and temperature was found complicated: it showed a significantly negative correlation (P < 0.01) in winter and spring and was insignificant in autumn, but in summer, only the correlation between the PM10 concentration and temperature on wetland was significant (P < 0.01); (3) the removal efficiencies of PM10 and PM2.5 followed the order of spring > winter > autumn > summer on the wetland, and the removal efficiency of PM10 was greater than that of PM2.5. This study is aim to provide practical measures to improve the air quality and facilitate sustainable development in Beijing.

Subject Areas

particulates; wetland; concentration; meteorological factors; removal efficiency

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