文献类型：期刊文献

英文题名：Comparison of dry and wet deposition of particulate matter in near-surface waters during summer

作者：Wu, Yanan[1] Liu, Jiakai[1] Zhai, Jiexiu[1] Cong, Ling[1] Wang, Yu[1] Ma, Wenmei[1] Zhang, Zhenming[1] Li, Chunyi[2]

第一作者：Wu, Yanan

通信作者：Zhang, ZM[1];Li, CY[2]

机构：[1]Beijing Forestry Univ, Coll Nat Conservat, Beijing, Peoples R China;[2]Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China

年份：2018

卷号：13

期号：6

外文期刊名：PLOS ONE

收录：;Scopus(收录号：2-s2.0-85048860037);WOS:【SCI-EXPANDED(收录号:WOS:000435802500061)】；

基金：This research was supported by the Fundamental Research Funds for the Central Universities (2016JX05) (ZZ), Forestry Public Welfare Projects Special Fund of China (201304301), and Beijing Municipal Science and Technology Project (Z141100006014031).

语种：英文

摘要：Atmospheric particulate matter (PM) deposition which involves both dry and wet processes is an important means of controlling air pollution. To investigate the characteristics of dry and wet deposition in wetlands, PM concentrations and meteorological conditions were monitored during summer at heights of 1.5 m, 6 m and 10 m above ground level at Cuihu Wetland (Beijing, China) in order to assess the efficiency of PM2.5 (particles with an aerodynamic size of <2.5 pm) and PM10 (particles with an aerodynamic size of <10 pm) removal. The results showed: Daily concentrations of PM, dry deposition velocities and fluxes changed with the same variation trend. The daily average deposition velocity for PM10 (3.19 +/- 1.18 cm.s(-1)) was almost 10 times that of PM2.5 (0.32 +/- 0.33 cm.s(-1)). For PM2.5, the following dry deposition fluxes were recorded: 10 m (0.170 +/- 0.463 mu g.m(-2).s(-1)) > 6 m (0.007 +/- 0.003 mu g-m(-2).s(-1)) > 1.5 m (0.005 +/- 0.002 mu g.m(-2).s(-1)). And the following deposition fluxes for PM10 were recorded: 10 m (2.163 +/- 2.941 mu g.m(-2).s(-1)) > 1.5 m (1.565 +/- 0.872 mu g.m(2).s(-1)) > 6 m (0.987 +/- 0.595 mu g.m(2).s(-1)). In the case of wet deposition, the relative deposition fluxes for PM2.5 and PM10 were 1.5 m > 10 m > 6 m, i.e. there was very little difference between the fluxes for PM2.5 (0.688 +/- 0.069 mu g.m(-2).s(-1)) and for PM10 (0.904 +/- 0.103 mu g.m(-2).s(-1)). It was also noted that rainfall intensity and PM diameter influenced wet deposition efficiency. Dry deposition (63%) was more tilted towards removing PM10 than was the case for wet deposition (37%). In terms of PM2.5 removal, wet deposition (92%) was found to be more efficient.