Heterogeneous Chemistry of Sub-micron Aerosols Related to Tropospheric Oxidants

EPA Grant Number: R825253
Title: Heterogeneous Chemistry of Sub-micron Aerosols Related to Tropospheric Oxidants
Investigators: Davidovits, Paul , Kolb, Charles E. , Worsnop, Douglas R. , Jayne, J. T.
Institution: Boston College
EPA Project Officer: Hahn, Intaek
Project Period: October 1, 1996 through September 30, 1999
Project Amount: $440,343
RFA: Air Quality (1996) RFA Text |  Recipients Lists
Research Category: Air Quality and Air Toxics , Air


Atmospheric research during the past decade has highlighted the critical role that atmospheric aerosols play in both chemical and physical processes relating to air pollution and climate change. The work proposed here is specifically designed to measure the heterogeneous processing capacity of submicron size aerosols as a function of particle size. This program will combine our prior experience in studying heterogeneous chemistry of atmospheric relevance with recently developed mass spectrometric aerosol sampling techniques for size and composition analysis of submicron particles. Emphasis will be placed on measuring changes in chemical composition of submicron aerosols (40 to 1000 nm in diameter) as a function of initial aerosol composition and size. The heterogeneous chemistry of nitrogen oxide species (NOx, NOy), O3, H2O2, and HO2 will be investigated on sulfuric acid, ammonium sulfate and sea salt aerosols. The effect of hydrocarbon and/or metal ion additives will also be investigated. This work will focus on measuring product appearances in both the gas and condensed phase as well as monitoring size dependent rates of gas uptake for processes which control gas phase oxidant production and destruction in the troposphere.

Publications and Presentations:

Publications have been submitted on this project: View all 16 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 3 journal articles for this project

Supplemental Keywords:

RFA, Scientific Discipline, Air, Geographic Area, particulate matter, Environmental Chemistry, climate change, State, Air Pollution Effects, tropospheric ozone, Atmospheric Sciences, Atmosphere, EPA Region, ambient aerosol, environmental monitoring, mass spectrometry, ammonium sulfate, heterogenous chemistry, air sampling, chemical composition, hydrocarbon oxidation, Massachusetts (MA), atmospheric chemical cycles, atmospheric aerosol particles, atmospheric monitoring, sulfuric acid, Region 1 , ambient aerosol particles, gas phase oxidant production, sub-micron aerosols, aerosols

Relevant Websites:

air, ambient air, atmosphere, ozone, troposphere, particulates, VOC, organics, environmental chemistry, Massachusetts, MA, Region 1.

Progress and Final Reports:

  • 1997
  • 1998
  • Final Report