%0 Journal Article %1 Walker:2006p999 %A Walker, J %A Robarge, W %A Shendrikar, A %A Kimball, H %D 2006 %J Environmental Pollution %K imported %N 2 %P 258--271 %T Inorganic PM2.5 at a US agricultural site %U http://links.isiglobalnet2.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=mekentosj&SrcApp=Papers&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000235701100007 %V 139 %X In this study, we present approximately two years (January 1999-December 2000) of atmospheric NH3, NH4+, HCl, Cl-, HNO3, NO3-, SO2, and SO4- concentrations measured by the annular denuder/filter pack method at an agricultural site in eastern North Carolina. This site is influenced by high NH3 emissions from animal production and fertilizer use in the surrounding area and neighboring counties. The two-year mean NH3 Concentration is 5.6 (+/- 5.13) mu g m(-3). The mean concentration of total inorganic PM2.5, which includes SO4=, NO3-, NH4+, and Cl-, is 8.0 (+/- 5.84) mu g m(-3). SO4=, NO3-, NH4+, and Cl- represent, respectively, 53, 24, 22, and 1% of measured inorganic PM2.5. NH3 contributes 72% of total NH3 + NH4+, on an average. Equilibrium modeling of the gas + aerosol NH3/H2SO4/HNO3 system shows that inorganic PM2.5 is more sensitive to reductions in gas + aerosol concentrations of sulfate and nitrate relative to NH3. (C) 2005 Elsevier Ltd. All rights reserved. %Z Article 017NU English Times Cited:0 Cited References Count:53

@article{Walker:2006p999, abstract = {In this study, we present approximately two years (January 1999-December 2000) of atmospheric NH3, NH4+, HCl, Cl-, HNO3, NO3-, SO2, and SO4- concentrations measured by the annular denuder/filter pack method at an agricultural site in eastern North Carolina. This site is influenced by high NH3 emissions from animal production and fertilizer use in the surrounding area and neighboring counties. The two-year mean NH3 Concentration is 5.6 (+/- 5.13) mu g m(-3). The mean concentration of total inorganic PM2.5, which includes SO4=, NO3-, NH4+, and Cl-, is 8.0 (+/- 5.84) mu g m(-3). SO4=, NO3-, NH4+, and Cl- represent, respectively, 53, 24, 22, and 1% of measured inorganic PM2.5. NH3 contributes 72% of total NH3 + NH4+, on an average. Equilibrium modeling of the gas + aerosol NH3/H2SO4/HNO3 system shows that inorganic PM2.5 is more sensitive to reductions in gas + aerosol concentrations of sulfate and nitrate relative to NH3. (C) 2005 Elsevier Ltd. All rights reserved.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Walker, JT US EPA, Natl Risk Management Res Lab, Air Pollut Prevent {\&} Control Div, Mail Drop E305-02,109 TW Alexander Dr, Res Triangle Pk, NC 27711 USA US EPA, Natl Risk Management Res Lab, Air Pollut Prevent {\&} Control Div, Res Triangle Pk, NC 27711 USA N Carolina State Univ, Dept Soil Sci, Raleigh, NC 27695 USA N Carolina Dept Environm {\&} Nat Resources, Div Air Qual, Raleigh, NC 27626 USA}, annote = {Article 017NU English Times Cited:0 Cited References Count:53}, author = {Walker, J and Robarge, W and Shendrikar, A and Kimball, H}, biburl = {https://www.bibsonomy.org/bibtex/2a84c3eaa8f0cd36fe40dae2e2db8c283/gsmith}, date-added = {2010-03-10 16:48:12 -0500}, date-modified = {2010-03-10 16:48:24 -0500}, interhash = {c2e48d2e629dab6ab8ea0ee0b492d850}, intrahash = {a84c3eaa8f0cd36fe40dae2e2db8c283}, journal = {Environmental Pollution}, keywords = {imported}, label = {rec-number 1100}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Environmental%20Pollution/2006/Environmental%20Pollution,%20139,%20258-271%202006.pdf}, month = Jan, number = 2, pages = {258--271}, pmid = {000235701100007}, rating = {0}, timestamp = {2010-06-22T19:39:24.000+0200}, title = {Inorganic PM2.5 at a US agricultural site}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p999}, url = {http://links.isiglobalnet2.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=mekentosj&SrcApp=Papers&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000235701100007}, volume = 139, year = 2006 }