| Summary: | 碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 97 === Incense smoke is one of the major indoor air pollution sources in Taiwan. There is a lack of information on investigations of the anhydrosugars distribution from the incense burning at indoor air environment. This study is aimed to characterize the particle-sized characteristics as well as the compositions of particulate mass、carbon species (OC& EC)、three anhydrosugars ( levoglucosan, mannosan, and galactosan ) and water soluble inorganic species derived from four different types of incense、bamboo and two type of joss paper burning in the indoor environment. Moreover, this study investigate clean efficiency of particle from incense burning at different indoor clean conditions, and to assess whether the anhydrosugars can be used as a tracer of incense burning in the indoor air.
The results shown that particulate distribution have significant variation of four types of incense burning. The particle size distribution of sticks (Herb Incense、Garoo Wood ) and coils (Sandle Wood A) form incense burning were concentrated in PM2.5 ( about 49.3~83.2% in TSP ), but powder type (sandalwood B) was concentrated in coarse particles ( 2.5 ~ 7.0 μm) emission (about 65.3% in TSP). Moreover, OC was mainly carbon emissions composition of incense burning (OC account for more than 90%, EC accounted for only 5.3%). In addition, the levoglucosan constituent accounts for over 90 % in three anhydrosugars from regardless of the form and type incense and joss paper burning (mannosan plus galactosan less than 10 %). The incense and joss paper burning for water soluble inorganic species were dominated by K+ 、Na+、Cl-、Ca2+ ,and NH4+、Cl-、SO42-, respectively. Otherwise, the factor that represents particle mass was highly correlated with anhydrosugar、organic carbon and fluoride ion concentrations (r2 > 0.90). However, OC had extensive sources in indoor air environment, and fluoride ion was emitted not high concentrations from incense burning, so that they can not be the tracer of incense burning. Anhydrosugars (Levoglucosan) had best correlation with particle mass (r2 = 0.99), and it only the existence of smoke from biomass burning characteristic suitable as a marker of incense burning source at indoor air environment. This study is the first effort to characterize molecular tracers for incense and joss paper burning in indoor air.
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