Characterization and inventory of PCDD/F emissions from coal-fired power plants and other sources in Taiwan.
The objectives of the present study were to quantify (1) the emission factors of a variety of dioxin emission sources; (2) the overall dioxin emission inventory in Taiwan as well as in a major metropolitan (KC area); and (3) the contribution of power plants to the overall PCDD/F emission. To achieve these goals, a total of 95 flue gas samples were collected and analyzed for 17 PCDD/Fs from 20 sources to develop emission factors. The emission factor of PCDD/Fs from coal-fired power plants (0.62 microgI-TEQton(-1)) obtained in this study is considerably higher than the values reported from different countries including UK, USA, and Spain by a factor of 2-265. It means that the air pollution control devices in certain power plants need to be more efficient. The emission data showed that there is a total annual release to air of 6.1 and 95gI-TEQ from major sources in the KC area and Taiwan, respectively. The dominant sources of PCDD/Fs in the KC area are the coal-fired power plants, secondary aluminum smelting, electric arc furnaces, and open burning of rice straw, which contributed for 56%, 17%, 13%, and 3.3% to the total, respectively. However, in Taiwan, the dominant sources of PCDD/Fs are the iron ore sintering, coal-fired power plants, electric arc furnaces, and open burning of rice straw, which contributed for 32%, 28%, 23%, and 8.1% to the total, respectively. The results of this study showed that coal-fired power plants are very significant sources of PCDD/Fs and also provide an important database to assist the decision makers for formulating policies to alleviate dioxin concerns.
Lin
Long-Full
LF
Department of Environmental Engineering, Kun Shan University, Tainan, Taiwan.
Lee
Wen-Jhy
WJ
Li
Hsing-Wang
HW
Wang
Mao-Sung
MS
Chang-Chien
Guo-Ping
GP
D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D000397:Air Pollution / Q000032:analysis; D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry*; D003031:Coal; D000072338:Dibenzofurans, Polychlorinated; D008670:Metals; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D011210:Power Plants; D012037:Refuse Disposal; D013624:Taiwan; D001335:Vehicle Emissions
D000393:Air Pollutants; D001572:Benzofurans; D003031:Coal; D000072338:Dibenzofurans, Polychlorinated; D008670:Metals; D000072317:Polychlorinated Dibenzodioxins; D001335:Vehicle Emissions