Initial Results on Use of Subcritical Water for Extraction and Fractionation of Organic Aerosol from Wood Smoke and Diesel Exhaust Particulate and Application of Toxicity Tests
نویسندگان
چکیده
In this study, subcritical water was used for the extraction and fractionation of organic atmospheric particulate. Two types of carbonaceous aerosol, diesel exhaust particulate (a relatively nonpolar matrix) and wood smoke particulate (a polar matrix), were sequentially extracted using subcritical water at temperatures ranging from 25°C to 300°C. The importance of each fraction was evaluated using two bacterial systems, the bacterial Polytox respiration test and the genotoxicity (SOS) Chromotest, and two mammalian systems, the in vitro cytotoxicity test and the hepatic mitochondrial respiration test. The results from the toxicity tests were related to the composition of individual fractions.
منابع مشابه
Toxicity of wide-range polarity fractions from wood smoke and diesel exhaust particulate obtained using hot pressurized water.
Epidemiological and toxicological studies correlate the adverse health effects of particulate matter (PM) with the available information regarding their chemical characterization, which has focused on nonpolar organics (e.g., polycyclic aromatic hydrocarbons [PAHs]), which are limited to 15 to 50% of total organic carbon. To study both polar and nonpolar species, we have employed hot pressurize...
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