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Environ Sci Technol

Title:		"Atmospheric Mercury in the Barnett Shale Area, Texas: Implications for Emissions from Oil and Gas Processing"
Author(s):		Lan X; Talbot R; Laine P; Torres A; Lefer B; Flynn J;
Address:		"Institute for Climate and Atmospheric Science, Department of Earth and Atmospheric Sciences, University of Houston , Houston, Texas 77004, United States"
Journal Title:		Environ Sci Technol
Year:		2015
Volume:		20150813
Issue:		17
Page Number:		10692 - 10700
DOI:		10.1021/acs.est.5b02287
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Atmospheric mercury emissions in the Barnett Shale area were studied by employing both stationary measurements and mobile laboratory surveys. Stationary measurements near the Engle Mountain Lake showed that the median mixing ratio of total gaseous mercury (THg) was 138 ppqv (140 +/- 29 ppqv for mean +/- S.D.) during the June 2011 study period. A distinct diurnal variation pattern was observed in which the highest THg levels appeared near midnight, followed by a monotonic decrease until midafternoon. The influence of oil and gas (ONG) emissions was substantial in this area, as inferred from the i-pentane/n-pentane ratio (1.17). However, few THg plumes were captured by our mobile laboratory during a approximately 3700 km survey with detailed downwind measurements from 50 ONG facilities. One compressor station and one natural gas condensate processing facility were found to have significant THg emissions, with maximum THg levels of 963 and 392 ppqv, respectively, and the emissions rates were estimated to be 7.9 kg/yr and 0.3 kg/yr, respectively. Our results suggest that the majority of ONG facilities in this area are not significant sources of THg; however, it is highly likely that a small number of these facilities contribute a relatively large amount of emissions in the ONG sector"
Keywords:		Air Pollutants/*analysis Atmosphere/*chemistry Carbon Monoxide/analysis Computer Simulation Geography Geologic Sediments/*chemistry Laboratories Mercury/*analysis Natural Gas/*analysis *Oil and Gas Fields Sulfur Dioxide/analysis Texas Time Factors Volatil;
Notes:		"MedlineLan, Xin Talbot, Robert Laine, Patrick Torres, Azucena Lefer, Barry Flynn, James eng Research Support, Non-U.S. Gov't 2015/07/29 Environ Sci Technol. 2015 Sep 1; 49(17):10692-700. doi: 10.1021/acs.est.5b02287. Epub 2015 Aug 13"