Enhancement effect of relative humidity on the formation and regional respiratory deposition of secondary organic aerosol

Kuo Pin Yu*, Chi Chi Lin, Shang Chun Yang, Ping Zhao

*此作品的通信作者

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

In this study, we investigated the effect of relative humidity (RH) on the formation of secondary organic aerosol (SOA) generated from the ozonolysis of d-limonene in an environmental chamber. The mass yield and the number concentration of SOA increased seven and eight times, respectively, when the RH increased from 18% to 82%. The measured total loss rates (apparent loss rates) of the number and mass concentration of SOA in the chamber ranged from 1.70 to 1.77h-1 and from 2.51 to 2.61h-1, respectively, at a controlled ventilation rate of 0.72±0.04h-1. The wall-deposition-loss-rate coefficient observed (1.00±0.02h-1) was approximate to the estimated value based on Zhao and Wu's model [1] which includes the factors of turbulence, Brownian diffusion, turbophoresis and surface roughness. According to the ICRP (International Commission on Radiological Protection) model, the inhaled SOA particles are deposited primarily in the alveoli of the lung. The integrated alveolar deposited dose of the mass (surface area) of SOA over 3h accounted for 74.0-74.8% (74.3-74.9%) of the total deposited dose at the investigated RH. Raising the RH resulted in the growth of SOA particle sizes and increment of the deposition dose but did not cause significant changes in the ratio of regional to the total respiratory deposition of SOA.

原文English
頁(從 - 到)94-102
頁數9
期刊Journal of Hazardous Materials
191
發行號1-3
DOIs
出版狀態Published - 15 7月 2011

指紋

深入研究「Enhancement effect of relative humidity on the formation and regional respiratory deposition of secondary organic aerosol」主題。共同形成了獨特的指紋。

引用此