Journal
JOURNAL OF ENVIRONMENTAL SCIENCES
Volume 21, Issue 9, Pages 1200-1207Publisher
SCIENCE PRESS
DOI: 10.1016/S1001-0742(08)62404-3
Keywords
rice straw; open burning; polycyclic aromatic hydrocarbons (PAHs); receptor model
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Funding
- The Central Taiwan University of Science and Technology [94-INS-024]
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Atmospheric particulate and polycyclic aromatic hydrocarbons (PAHs) size distribution were measured at Jhu-Shan (a rural site) and Sin-Gang (a town site) in central Taiwan during the rice straw burning and non-burning periods. The concentrations of total PAHs accounting for a roughly 58% (34%) increment in the concentrations of total PAHs due to rice-straw burning. Combustion-related PAHs during burning periods were 1.54-2.57 times higher than those during non-burning periods. The mass median diameter (MMD) of 0.88-1.21 mu m in the particulate phase suggested that rice-straw burning generated the increase in coarse particle number. Chemical mass balance (CMB) receptor model analyses showed that the primary pollution sources at the two sites were similar. However, rice-straw burning emission was specifically identified as a significant source of PAH during burning periods at the two sites. Open burning of rice straws was estimated to contribute approximately 6.3%-24.6% to total atmospheric PAHs at the two sites.
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