| dc.creator | Pachon, Jorge E. | |
| dc.creator | Weber, Rodney J. | |
| dc.creator | Zhang, Xiaolu | |
| dc.creator | Mulholland, James A. | |
| dc.creator | Russell, Armistead G. | |
| dc.date | 2013-01-01T08:00:00Z | |
| dc.date.accessioned | 2022-10-13T13:36:29Z | |
| dc.date.available | 2022-10-13T13:36:29Z | |
| dc.identifier | https://ciencia.lasalle.edu.co/scopus_unisalle/543 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4157741 | |
| dc.description | Elemental potassium has been extensively used as an indicator of biomass burning in the source apportionment of PM . We present a method to estimate the fraction of potassium associated with biomass burning (K ) based on a linear regression with iron that can be applied at any site where PM chemical speciation is available. The estimated fraction has a significantly greater correlation with levoglucosan (R =0.63), an organic tracer of biomass burning, than total potassium (R =0.39). We explore temporal and spatial variability of K over a period of six years in the Atlanta area. K is larger in spring when biomass burning activity is more prevalent and during weekends due to the use of fireplaces in winter and outdoor charcoal cooking in summer. K is the predominate form of potassium for the rural site in this study. The use of K in a receptor model results in a lower fraction of PM apportioned to biomass burning and a greater fraction to mobile sources when compared to the use of total K. Results suggest that K is a good indicator of biomass burning. © Author(s) 2012. 2.5 b 2.5 b b b b 2.5 b 2 2 | |
| dc.source | Atmospheric Pollution Research | |
| dc.source | 14 | |
| dc.subject | Biomass burning | |
| dc.subject | Factor analysis | |
| dc.subject | Levoglucosan | |
| dc.subject | PMF | |
| dc.subject | Potassium | |
| dc.title | Revising the use of potassium (K) in the source apportionment of PM<sub>2.5</sub> | |
| dc.type | Article | |
