Search Result
Technology Innovation News Survey Feed (RSS)
A GLOBAL ATMOSPHERIC CHEMISTRY MODEL FOR THE FATE AND TRANSPORT OF PFCAS AND THEIR PRECURSORS
Thackray, C.P., N.E. Selin, and C.J. Young.
Environmental Science Processes & Impacts 22, 285(2020)
Results are presented from simulations of atmospheric PFCA formation and fate using GEOS-Chem. The simulations use the most up-to-date chemistry available for the degradation of precursors and deposition and transport of the precursors, intermediates, and end-products. Ratios of long-chain to short-chain PFCAs increased strongly with distance from source regions. The model captured the observed relationship between rainwater abundance and PFCA chain length, as well as the average deposition rates at mid-latitude and Arctic sites, but underestimated the deposition of PFDoA, PFDA, and TFA at mid-latitudes and PFNA at the Devon Ice Cap. Atmospheric sources of PFCAs were estimated at 6-185 tonnes per year globally and 0.1-2.1 tonnes per year to the Arctic. https://pubs.rsc.org/en/content/articlepdf/2020/em/c9em00326f?page=search
Environmental Science Processes & Impacts 22, 285(2020)
Results are presented from simulations of atmospheric PFCA formation and fate using GEOS-Chem. The simulations use the most up-to-date chemistry available for the degradation of precursors and deposition and transport of the precursors, intermediates, and end-products. Ratios of long-chain to short-chain PFCAs increased strongly with distance from source regions. The model captured the observed relationship between rainwater abundance and PFCA chain length, as well as the average deposition rates at mid-latitude and Arctic sites, but underestimated the deposition of PFDoA, PFDA, and TFA at mid-latitudes and PFNA at the Devon Ice Cap. Atmospheric sources of PFCAs were estimated at 6-185 tonnes per year globally and 0.1-2.1 tonnes per year to the Arctic. https://pubs.rsc.org/en/content/articlepdf/2020/em/c9em00326f?page=searc
The Technology Innovation News Survey welcomes your comments and
suggestions, as well as information about errors for correction. Please
contact Michael Adam of the U.S. EPA Office of Superfund Remediation
and Technology Innovation at adam.michael@epa.gov or (703) 603-9915
with any comments, suggestions, or corrections.
Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.
