THÀNH PHẦN VÀ SỰ PHÁT THẢI PAHs TRONG BỤI KHÍ THẢI VÀ TRO THẢI TỪ MỘT SỐ LÒ ĐỐT KHU VỰC PHÍA BẮC VIỆT NAM

Tóm tắt

This study focuses on the determining the total content, composition and emission coefficient of PAHs
in PM10 dust, fly ash (FA) and bottom ash (BA) of some domestic and industrial waste incinerators in
the northern region of Vietnam. Samples were taken according to TCVN 9466:2012. The content of
PAHs was analyzed using GC-MS Agilent 8890 according to the EPA 8270 method. The study results
showed that the average total content of 18 PAHs compounds (referred to as Ʃ18PAHs) in PM10 dust,
FA and BA was 9.95×103 ng/Nm3
, 215×103 ng/g, and 2.38 × 103 ng/g, respectively. Naphthalene is
most abundant in PM10 dust, accounting for 60% of Ʃ18PAHs, while Phenanthrene, Anthracene and
Fluoranthene and Pyrene are mainly present in FA and BA, accounting for 10 - 40% of Ʃ18PAHs. The
average emission factors of ∑18 PAHs in PM10, FA and BA were 55.6 × 103 µg/ton, 391 × 103 µg/ton
and 291 × 103 µg/ton, respectively. The average emission factor of ∑18 PAHs increases in the order of
PM10 > BA > FA.
The results of this preliminary study have shown the pollution properties of PAHs emitted from flue gas
dust and waste ash from domestic and industrial incinerators. Therefore, it is necessary to take
measures to reduce emissions of these compounds during combustion, reduce substances derived from
organic waste, and control the combustion temperature of the incinerator.