Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6327733 | Science of The Total Environment | 2015 | 10 Pages |
Abstract
The polycyclic aromatic hydrocarbon emissions in particulate and gas phases generated from smoldering mosquito coils containing various atomic H/C ratios were examined. Five types of mosquito coils were burned in a test chamber with a total airflow rate of 8.0Â L/min at a constant relative humidity and temperature. The concentrations of individual PAHs were determined using the GC/MS technique. Among the used mosquito coils, the atomic H/C ratio ranged from 1.23 to 1.57, yielding total mass, gaseous, and particulate PAH emission factors of 28.17-78.72Â mg/g, 26,139.80-35,932.98 and 5735.22-13,431.51Â ng/g, respectively. The various partitions of PAHs in the gaseous and particulate phases were in the ranges, 70.26-83.70% and 16.30-29.74% for the utilized mosquito coils. The carcinogenic potency of PAH emissions in the particulate phase (203.82-797.76Â ng/g) was approximately 6.92-25.08 times higher than that of the gaseous phase (26.27-36.07Â ng/g). Based on the analyses of PAH emissions, mosquito coils containing the lowest H/C ratio, a low oxygen level, and additional additives (i.e., CaCO3) are recommended for minimizing the production of total PAH emission factors and carcinogenic potency.
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Authors
Tzu-Ting Yang, Shaw-Tao Lin, Tser-Sheng Lin, Hua-Yi Chung,