Document Detail


Heterogeneous chemistry of alkylamines with sulfuric acid: implications for atmospheric formation of alkylaminium sulfates.
MedLine Citation:
PMID:  20192255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The heterogeneous interaction of alkylamines with sulfuric acid has been investigated to assess the role of amines in aerosol growth through the formation of alkylaminium sulfates. The kinetic experiments were conducted in a low-pressure fast flow reactor coupled to an ion drift-chemical ionization mass spectrometer (ID-CIMS). The measurements of heterogeneous uptake of methylamine, dimethylamine, and trimethylamine were performed in the acidity range of 59-82 wt % H(2)SO(4) and between 243 and 283 K. Irreversible reactive uptakes were observed for all three alkylamines, with comparable uptake coefficients (gamma) in the range of 2.0 x 10(-2) to 4.4 x 10(-2). The measured gamma value was slightly higher in more concentrated sulfuric acid and at lower temperatures. The results imply that the heterogeneous reactions of alkylamines contribute effectively to the growth of atmospheric acidic particles and, hence, secondary organic aerosol formation.
Authors:
Lin Wang; Vinita Lal; Alexei F Khalizov; Renyi Zhang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental science & technology     Volume:  44     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-30     Completed Date:  2010-06-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2461-5     Citation Subset:  IM    
Affiliation:
Department of Atmospheric Sciences and Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
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MeSH Terms
Descriptor/Qualifier:
Amines / chemistry*
Atmosphere / chemistry*
Methylamines / chemistry
Protons
Sulfates / chemistry*
Sulfuric Acids / chemistry*
Temperature
Time Factors
Chemical
Reg. No./Substance:
0/Amines; 0/Methylamines; 0/Protons; 0/Sulfates; 0/Sulfuric Acids; 75-50-3/trimethylamine; 7664-93-9/sulfuric acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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