A theoretical evaluation on the HNO3 artifact of the annular denuder system due to evaporation and diffusional deposition of NH4NO3-containing aerosols

被引：5

作者：

Chang, KF

Lu, CS ^{[1
]}

Bai, HL

Fang, GC

机构：

[1] Natl Chung Hsing Univ, Dept Environm Engn, Taichung 402, Taiwan

[2] Natl Chiao Tung Univ, Inst Environm Engn, Hsinchu 300, Taiwan

[3] Hungkuang Inst Technol, Air Tox & Environm Anal Lab, Taichung 433, Taiwan

来源：

ATMOSPHERIC ENVIRONMENT | 2002年 / 36卷 / 27期

关键词：

annular denuder system; measurement artifact; HNO3; NH4NO3; evaporation; mass accommodation coefficient;

D O I：

10.1016/S1352-2310(02)00352-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

(A) mathematical model was developed to evaluate HNO3 artifact of the annular denuder system due to evaporation and diffusional deposition of nitrate-containing aerosols. The model performance was validated by comparing its numerical solutions with laboratory and numerical data available in the literature for evaporation and diffusional deposition of monodisperse and polydisperse NH4NO3 aerosols. Measurement artifacts were evaluated by varying typical sampling ranges of ambient temperature, HNO3 gas concentration, aerosol number concentration, aerosol mass median diameter, and nitrate mass fraction of < 2.5 mum aerosols to see their respective effects. Potential application of the present model on estimating HNO3 artifacts was demonstrated using literature data sampled in USA, Taiwan, Netherlands, Korea and Japan. Significant measurement artifact could be found in Taiwan and Netherlands due either to low HNO3 gas concentration and high nitrate concentration in < 2.5 mum aerosols or to high ambient temperature. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：4357 / 4366

页数：10

共 32 条

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