Analysis and Evaluation of Contamination Status of Polycyclic Aromatic Hydrocarbons (PAHs) in Settled House and Road Dust Samples from Hanoi

Abstract

Concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) were determined in settled house dust and road dust samples collected from a core urban area of Hanoi. Levels of PAHs ranged from 830 to 3500 (median 2000) ng/g in house dust, and from 1400 to 4700 (median 1700) ng/g in road dust. Concentrations of PAHs in dust samples of this study were within the moderate range as compared with those from other countries in the world. Toxic equivalents to benzo[a]pyrene (BaP-EQs) in our samples ranged from 81 to 850 (median 330) ng BaP-EQ/g with principal contributors as BaP and dibenz[a,h]anthracene, which accounted for 69% to 93% of BaP-EQs. In almost all the samples, proportions of high-molecular-weight PAHs (HMW-PAHs with 4–6 rings) were higher than those of low-molecular-weight PAHs (LMW-PAHs with 2–3 rings), suggesting emission sources from combustion processes rather than direct contamination by petrogenic sources. Traffic activities were estimated as important sources of PAHs in the studied areas, for example, vehicular exhaust and tire debris.
 Keywords: PAHs, house dust, road dust, traffic emission, urbanization.
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Đánh giá hiện trạng nồng độ các hợp chất PAHs (Polycyclic Aromatic Hydrocarbons) trong nước mặt Hồ Tây, Thành phố Hà Nội

“…Tại Việt Nam, đánh giá sự xuất hiện của PAHs trong môi trường cũng đã và đang được quan tâm nghiên cứu. Các nghiên cứ hiện đang tập trung vào các thành phần môi trường và đối tượng như trong không khí [20], bụi đường phố [21][22][23], nước sông [24], đất trầm tích [25], động vật đáy [26]. Hiện nay các nghiên cứu đánh giá về nồng độ các hợp chất PAHs trong nước hồ tại Việt Nam còn khá khiêm tốn.…”

Đánh giá hiện trạng nồng độ hợp chất Polycyclic Aromatic Hydrocarbons (PAHs) trong nước sông Nhuệ đoạn chảy qua các quận nội thành Hà Nội

“…Tại Việt Nam, các nghiên cứu đã thực hiện để đánh giá PAHs trong môi trường trầm tích ven biển và rừng ngập mặn [27][28][29] bụi không khí, bụi đường phố [30][31][32]. PAHs cũng được tìm thấy trong sinh vật như cá [33], động vật hai mảnh [34], trong thực phẩm như cà phê [35].…”

Distribution and Toxic Equipvalent Assessement of Polycyclic Aromatic Hydrocarbons (Pahs) in Particulate Matter Emmited from Rice Straw Open Field Burning in Hanoi

“…Một số nghiên cứu về PAHs trong không khí khu vực nông thôn, giao thông và đô thị đã được thực hiện tại việt Nam [5, 15, 16 -19]. Hiền và cs, 2013 khảo sát phân bố về kích thước và nguồn gốc của các PAHs trong bụi tại các địa điểm gồm tầng hầm bãi giữ xe, ven đường và không khí xung quanh ở thành phố Hồ Chí Minh [18]. Hoàng và cs 2019 phân tích hàm lượng và đánh giá mức độ ô nhiễm của các PAHs trong bụi lắng trong nhà và trên mặt đường tại Hà nội [19].…”