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Lafontaine S, Schrlau J, Butler J, Jia Y, Harper B, Harris S, Bramer LM, Waters K, Harding A, Simonich SLM. Relative Influence of Trans-Pacific and Regional Atmospheric Transport of PAHs in the Pacific Northwest, U.S. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:13807-16. [PMID: 26151337 PMCID: PMC4666789 DOI: 10.1021/acs.est.5b00800] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 05/15/2015] [Accepted: 06/22/2015] [Indexed: 05/22/2023]
Abstract
The relative influences of trans-Pacific and regional atmospheric transport on measured concentrations of polycyclic aromatic hydrocarbons (PAHs), PAH derivatives (nitro- (NPAH) and oxy-(OPAH)), organic carbon (OC), and particulate matter (PM) less than 2.5 μm in diameter (PM2.5) were investigated in the Pacific Northwest, U.S. in 2010-2011. Ambient high volume PM2.5 air samples were collected at two sites in the Pacific Northwest: (1.) Mount Bachelor Observatory (MBO) in the Oregon Cascade Range (2763 m above sea level (asl)) and 2.) Confederated Tribes of the Umatilla Indian Reservation (CTUIR) in the Columbia River Gorge (CRG) (954 m asl). At MBO, the 1,8-dinitropyrene concentration was significantly positively correlated with the time a sampled air mass spent over Asia, suggesting that this NPAH may be a good marker for trans-Pacific atmospheric transport. At CTUIR, NOx, CO2, and SO2 emissions from a 585 MW coal fired power plant, in Boardman OR, were found to be significantly positively correlated with PAH, OPAH, NPAH, OC, and PM2.5 concentrations. By comparing the Boardman Plant operational time frames when the plant was operating to when it was shut down, the plant was found to contribute a large percentage of the measured PAH (67%), NPAH (91%), OPAH (54%), PM2.5 (39%), and OC (38%) concentrations at CTUIR and the CRG prior to Spring 2011 and likely masked trans-Pacific atmospheric transport events to the CRG. Upgrades installed to the Boardman Plant in the spring of 2011 dramatically reduced the plant's contribution to PAH and OPAH concentrations (by ∼72% and ∼40%, respectively) at CTUIR and the CRG, but not NPAH, PM2.5 or OC concentrations.
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Affiliation(s)
- Scott Lafontaine
- Department
of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jill Schrlau
- Environmental
and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jack Butler
- Confederated
Tribes
of the Umatilla Indian Reservation, Pendleton, Oregon 97801, United States
| | - Yuling Jia
- Environmental
and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Barbara Harper
- Confederated
Tribes
of the Umatilla Indian Reservation, Pendleton, Oregon 97801, United States
- School
of Biological and Population Health Sciences, College of Public Health
and Human Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - Stuart Harris
- Confederated
Tribes
of the Umatilla Indian Reservation, Pendleton, Oregon 97801, United States
| | - Lisa M. Bramer
- Computational
and Statistical Analytics, Pacific Northwest
National Laboratory, Richland, Washington 99352, United States
| | - Katrina
M. Waters
- Computational
Biology and Bioinformatics, Pacific Northwest
National Laboratory, Richland, Washington 99352, United States
| | - Anna Harding
- School
of Biological and Population Health Sciences, College of Public Health
and Human Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - Staci L. Massey Simonich
- Department
of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
- Environmental
and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
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