A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan

Tsai, C J; Perng, S B; Chiou, S F; Lin, T Y

Title: A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan

Full Record
Other Related Research

Abstract

An annular denuder system (ADS), a honeycomb denuder system (HDS) and a micro-orifice uniform deposit impactor (MOUDI) were used to investigate the physical and chemical characteristics of acidic aerosols in Hsinchu Taiwan. The performances of different denuder samplers were also compared. The concentrations (in {mu}g/m{sup 3}) of major ionic species: H{sup +}, SO{sub 4}{sup 2{minus}} NO{sub 3}{sup {minus}} and NH{sub 4}{sup +} are found to average 0.019{+-}0.01 (std. dev.) (range: 0.00--0.02), 7.60{+-}5.08 (range: 1.37--16.54), 7.67{+-}5.50 (range: 1.18--21.58) and 5.27{+-}2.90 (range: 1.14--9.42), as measured by the ADS, respectively. Aerosol acidity is not severe compared to urban cities in other countries, due to neutralization of aerosol acidity by ammonia in Hsinchu. The results indicate that the size distributions of H{sup +} and NH{sub 4}{sup +} are in the single mode while those of NO{sub 3}{sup {minus}} and SO{sub 4}{sup 2{minus}} are found to be mainly bimodal. The ions such as SO{sub 4}{sup 2{minus}}, NO{sub 3}{sup {minus}}, NH{sub 4}{sup +} and H{sup +} are dominant in the fine mode, while ions such as Cl{sup {minus}}, Na{sup +} and K{sup +} are found to be in both fine and coarse modes. Comparing two different denuder samplers, the average concentration of HNO{sub 3} measured bymore »« less

Authors:: Tsai, C J; Perng, S B; Chiou, S F; Lin, T Y

Publication Date:: Thu Jul 01 00:00:00 EDT 1999

Research Org.:: National Chiao Tung Univ., Hsinchu (TW)

OSTI Identifier:: 20006508

Report Number(s):: CONF-990608-
TRN: IM200008%%115

Resource Type:: Conference

Resource Relation:: Conference: Air and Waste 92nd Annual Meeting and Exhibition, St. Louis, MO (US), 06/20/1999--06/24/1999; Other Information: 1 CD-ROM. Operating Systems: Windows 3.1, '95, '98 and NT; Macintosh; and UNIX; PBD: 1999; Related Information: In: Air and Waste 92nd annual meeting and exhibition proceedings, [9500] pages.

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; AIR POLLUTION; TAIWAN; AIR SAMPLERS; PERFORMANCE; AEROSOL MONITORING; PARTICLE SIZE; SULFATES; NITRATES; NITRIC ACID

Citation Formats


                    Tsai, C J, Perng, S B, Chiou, S F, and Lin, T Y. A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan.  United States: N. p., 1999. 
        Web.

Copy to clipboard


                    Tsai, C J, Perng, S B, Chiou, S F, & Lin, T Y. A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan.  United States.

Copy to clipboard


                    Tsai, C J, Perng, S B, Chiou, S F, and Lin, T Y. 1999.  
        "A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan".  United States.

Copy to clipboard


                    
@article{osti_20006508,

  title        = {A study of the performance of different acidic aerosol samplers and the characteristics of acidic aerosols in Hsinchu Taiwan},

  author       = {Tsai, C J and Perng, S B and Chiou, S F and Lin, T Y},

  abstractNote = {An annular denuder system (ADS), a honeycomb denuder system (HDS) and a micro-orifice uniform deposit impactor (MOUDI) were used to investigate the physical and chemical characteristics of acidic aerosols in Hsinchu Taiwan. The performances of different denuder samplers were also compared. The concentrations (in {mu}g/m{sup 3}) of major ionic species: H{sup +}, SO{sub 4}{sup 2{minus}} NO{sub 3}{sup {minus}} and NH{sub 4}{sup +} are found to average 0.019{+-}0.01 (std. dev.) (range: 0.00--0.02), 7.60{+-}5.08 (range: 1.37--16.54), 7.67{+-}5.50 (range: 1.18--21.58) and 5.27{+-}2.90 (range: 1.14--9.42), as measured by the ADS, respectively. Aerosol acidity is not severe compared to urban cities in other countries, due to neutralization of aerosol acidity by ammonia in Hsinchu. The results indicate that the size distributions of H{sup +} and NH{sub 4}{sup +} are in the single mode while those of NO{sub 3}{sup {minus}} and SO{sub 4}{sup 2{minus}} are found to be mainly bimodal. The ions such as SO{sub 4}{sup 2{minus}}, NO{sub 3}{sup {minus}}, NH{sub 4}{sup +} and H{sup +} are dominant in the fine mode, while ions such as Cl{sup {minus}}, Na{sup +} and K{sup +} are found to be in both fine and coarse modes. Comparing two different denuder samplers, the average concentration of HNO{sub 3} measured by the HDS is found to be 40% higher than that of the ADS while the average concentrations of NO{sub 3}{sup {minus}} and Cl{sup {minus}} measured by the ADS are higher than those of the HDS by 12% and 14%, respectively. The concentrations of other species are found to be similar in both denuder samplers.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/20006508},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jul 01 00:00:00 EDT 1999},

  month        = {Thu Jul 01 00:00:00 EDT 1999}

}

Copy to clipboard

Conference:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Field evaluation of a glass honeycomb denuder/filter pack system to collect atmospheric gases and particles

Book Sioutas, C; Koutrakis, P; Wolfson, J; ...

The authors have developed a glass honeycomb denuder/filter pack system to sample atmospheric inorganic gases and particles. The main feature of the sampler is the denuder component, which has a large number of small hexagonal glass tubes sealed inside an outer glass tube. Outdoor concentrations of nitric acid (HNO{sub 3}), nitrous acid (HONO), ammonia (NH{sub 3}), sulfur dioxide (SO{sub 2}), and fine-particle sulfate (SO{sub 4}{sup 2{minus}}) and ammonium (NH{sub 4}{sup +}) determined with the honeycomb denuder sampler were compared to those determined with a collocated Harvard/EPA Annular Denuder System (HEADS). The average collection of the HEADS sampler was higher thanmore »« less
Indoor and outdoor concentrations of inorganic acidic aerosols and gases

Journal Article Brauer, M; Koutrakis, P; Keeler, G; ... - Journal of the Air and Waste Management Association; (United States)

Annular denuder-filter pack sampling systems were used to make indoor and outdoor measurements of aerosol strong H{sup +}, SO{sub 4}{sup 2{minus}}, NH{sub 4}{sup +}, NO{sub 3}{sup {minus}} and NO{sub 2}{sup {minus}}, and the gaseous pollutants SO{sub 2}, HNO{sub 3}, HONO and NH{sub 3} during summer and winter periods in Boston, Massachusetts. Outdoor levels of SO{sub 2}, HNO{sub 3}, H{sup +} and SO{sub 4}{sup 2{minus}} exceeded their indoor concentrations during both seasons. Winter indoor/outdoor ratios were lower than during the summer, probably due to lower air exchange rates during the winter period. During both monitoring periods, indoor/outdoor ratios of aerosol strongmore »« less
https://doi.org/10.1080/10473289.1991.10466834
Evaluation of an annular denuder/filter pack system to collect acidic aerosols and gases

Journal Article Koutrakis, P; Wolfson, J; Slater, J; ... - Environ. Sci. Technol.; (United States)

A glass impactor was designed and evaluated along with an annular denude/filter pack system. The glass impactor has a 50% aerodynamic cutoff of 2.1 ..mu..m at a flow of 10 L min/sup /minus/1/ and allows a quantitative transfer of gases and fine particles to the annular denuder and filter pack components. Fine particle and gas concentrations, determined by using the glass impactor along with the annular denuder/filter pack, were in good agreement with those obtained with colocated reference samplers. Measurements of SO/sub 2/, HNO/sub 3/, and HNO/sub 2/ gases showed mean collection efficiencies of 0.993, 0.984, and 0.952, respectively, whichmore »« less
https://doi.org/10.1021/es00177a013
Rain and aerosol chemical composition obtained with newly developed automated sampling systems

Conference Stevens, R; Paur, R; Baumgardner, R; ... - Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

Rain and aerosol samples were collected concurrently for a number of rain events in the Research Triangle Park, NC recently with a newly developed automated rain sampler and an annular denuder system. The rain sampler collects sequential 0.3 mm aliquots of each rain event and simultaneously 1) measures and records the pH, conductivity and 2) stores the balance of the rain sample at sub-ambient conditions (NH/sub 3/ free conditions) for subsequent chemical analysis. Ambient concentrations of SO/sub 2/, HNO/sub 3/, HONO nitrates and sulfates are also collected concurrently over 12-hour intervals with an automated annular denuder method (ADM) recently developedmore »« less
Strong and weak acidity of aerosols collected over the northeastern United States

Journal Article Ferek, R; Lazrus, A; Haagenson, P; ... - Environ. Sci. Technol.; (United States)

Total sulfate, acidity, and principal cations were measured in aerosol samples collected from an aircraft over the northeastern United States and at ground level on filters protected by a denuder tube for NH/sub 3/. Aerosol acidity was determined by aqueous extraction of the filters and titration with NaOH. Strong and weak acid components were resolved by using Gran plots, and for 30 fall and summer samples the weak acidity comprised x +/- s = 26 +/- 12% of the total acidity. The strong acidity averaged 25 +/- 18% of the total sulfate equivalents. Hydrogen ion plus ammonium ion balanced closelymore »« less
https://doi.org/10.1021/es00112a003

Similar Records