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N"2O"5 hydrolysis on the components of mineral dust and sea salt aerosol: Comparison study in an environmental aerosol reaction chamber [An article from: Atmospheric Environment] | Digital

by P.K. Mogili (Author), P.D. Kleiber (Author), M.A. Young (Author), V Grassian (Author)

List Price:

$10.95

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Available for download now

Binding:

Digital

Publisher:

Elsevier

Publication Date:

December 01, 2006

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Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: The kinetics of the heterogeneous hydrolysis of N"2O"5 on some of the major components of mineral dust and sea salt aerosol have been investigated in an environmental aerosol chamber. Gas-phase N"2O"5 undergoes heterogeneous reaction to form HNO"3 on carbonate, clay and oxide minerals. The nitric acid hydrolysis product was promptly detected in the gas phase concomitant with the decay of N"2O"5 over time. The N"2O"5 decay kinetics were measured and analyzed assuming first-order reaction kinetics. When normalized for surface area, heterogeneous decay of N"2O"5 on the different minerals followed the reactivity trend; kaolinite > hematite > montmorillonite > calcite>quartz. N"2O"5 decay was faster on all of the mineral dust aerosol components relative to NaCl, a major component of sea salt, at a relative humidity (RH) below the NaCl deliquescence point. The measured heterogeneous uptake coefficients were over an order of magnitude larger on several of the mineral dust aerosol compared to NaCl. The uptake coefficient was found to increase with RH.