Polycyclic aromatic hydrocarbons in filterable PM2.5 emissions generated from regulated stationary sources in the metropolitan area of Costa Rica
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| Nhiều tác giả: | , , , , |
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| Định dạng: | artículo |
| Ngày xuất bản: | 2017 |
| Miêu tả: | This study analyzed the profiles of polycyclic aromatic hydrocarbons (PAHs) in filterable PM2.5 particles collected from a total of 71 boilers and 22 indirect type furnaces that burn liquid and biomass fuels in the Metropolitan Area of Costa Rica, from February 2014 to November 2015. Modified method NIOSH 5506 was used to analyze PAHs content present in the filter samples. The average concentration of PM2.5 showed values between 18 and 735 mg m−3, based on the source and fuel type used, while the total PAHs in the PM2.5 fraction ranged 1.02–592 μgm−3. For biomass boilers, the most abundant species were Benzo[g,h,i]perylene (BghiP) (35.7–46.5%), Indeno[1,2,3-cd]pyrene (IND) (20.6–27.1%), Benzo[a]pyrene (BaP) (5.2–14.7%) and Dibenzo[a,h]anthracene (DBA) (3.2–13.9%), while for liquid fuels IND (12.8–20.5%), BghiP (7.9–21.2%), Fluoranthene (Flu) (14.5–21.3%) and Pyrene (Pyr) (9.8–14.5%) prevailed. The particles from biomass furnace emissions present higher concentrations of PAHs classified by the U.S. EPA as probable human carcinogens causing a greater health risk than other fuels. Among the diagnostic concentration ratios examined, only BaP/(BaP+Chr), BaA/Chr, BaA/BaP and Pyr/BaP coefficients demonstrated codependency on the type of fuel used. |
| Quốc gia: | Repositorio UNA |
| Tổ chức giáo dục: | Universidad Nacional de Costa Rica |
| Repositorio: | Repositorio UNA |
| Ngôn ngữ: | Inglés |
| OAI Identifier: | oai:https://repositorio.una.ac.cr:11056/20957 |
| Truy cập trực tuyến: | http://hdl.handle.net/11056/20957 https://doi.org/10.1016/j.apr.2017.02.002 |
| Access Level: | acceso abierto |
| Từ khóa: | COSTA RICA HIDROCARBUROS HYDROCARBONS COMBUSTIBLES FUEL MANEJO AMBIENTAL ENVIRONMENTAL MANAGEMENT CONTAMINACIÓN DEL AIRE AIR POLLUTION |