title: Particulate matter assessment of a wetland in Beijing.
abstract: To increase the knowledge on the particulate matter of a wetland in Beijing, an experimental study on the concentration and composition of PM10 and PM2.5 was implemented in Beijing Olympic Forest Park from 2013 to 2014. This study analyzed the meteorological factors and deposition fluxes at different heights and in different periods in the wetlands. The results showed that the mean mass concentrations of PM10 and PM2.5 were the highest at 06:00-09:00 and the lowest at 15:00-18:00. And the annual concentration of PM10 and PM2.5 in the wetland followed the order of dry period (winter)>normal water period (spring and autumn)>wet period (summer), with the concentration in the dry period significantly higher than that in the normal water and wet periods. The chemical composition of PM2.5 in the wetlands included NH4(+), K(+), Na(+), Mg(2+), SO4(2-), NO3(-), and Cl(-), which respectively accounted for 12.7%, 1.0%, 0.8%, 0.7%, 46.6%, 33.2%, and 5.1% of the average annual composition. The concentration of PM10 and PM2.5 in the wetlands had a significant positive correlation with relative humidity, a negative correlation with wind speed, and an insignificant negative correlation with temperature and radiation. The daily average dry deposition amount of PM10 in the different periods followed the order of dry period>normal water period>wet period, and the daily average dry deposition amount of PM2.5 in the different periods was dry period>wet period>normal water period.
authors.affiliation: College of Nature Conservation, Beijing Forestry University, Beijing 100083, China. Electronic address: qiudong329@163.com.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Qiu
authors.affiliation: College of Nature Conservation, Beijing Forestry University, Beijing 100083, China. Electronic address: may_ron@126.com.
authors.forename: Jiakai
authors.initials: J
authors.lastname: Liu
authors.affiliation: College of Nature Conservation, Beijing Forestry University, Beijing 100083, China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Beijing Administrative College, Beijing 100044, China.
authors.forename: Lichun
authors.initials: L
authors.lastname: Mo
authors.affiliation: College of Nature Conservation, Beijing Forestry University, Beijing 100083, China. Electronic address: zhenmingzhang@bjfu.edu.cn.
authors.forename: Zhenming
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000068476:Beijing; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D014887:Weather; D053833:Wetlands
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter
keywords: Dry deposition; Meteorological factors; Particulate matter; Wetland