Institute of Tropical Medicine, Joint Vietnam-Russia Tropical Science and Technology Research Center, 63 Nguyen Van Huyen Street, Cau Giay District, Hanoi, Vietnam.
Environ Sci Pollut Res Int. 2024 Sep;31(44):56130-56139. doi: 10.1007/s11356-024-34818-1. Epub 2024 Sep 10.
The air pollution levels from polychlorodibenzo-p-dioxins/polychlorodibenzofurans (PCDD/Fs) and dioxin-like polychlorobiphenyls (dl-PCBs) in three residential areas located north, west, and south of the Da Nang airport were determined by using passive air samplers containing polyurethane foam (PUF) discs with 3-month sampling intervals from 2017 to 2020. The total toxic equivalents (∑TEQs) of the PCDD/Fs and dl-PCBs, using WHO-TEFs, were highest north of the airport (134 to 10610 fg WHO-TEQ/PUF day, with an average of 1108 fg WHO-TEQ/PUF day). The ∑TEQs were lower west of the airport, between 159 and 381 fg WHO-TEQ/PUF day and averaged 230 fg WHO-TEQ/PUF day. The lowest ∑TEQs occurred south of the airport, with ranges of 76 and 331 fg WHO-TEQ/PUF day and an average of 152 fg WHO-TEQ/PUF day. Construction activities, including excavation and transportation of dioxin-contaminated soil north of the airport, have increased airborne PCDD/F and dl-PCB contamination and health risks. The average daily doses of PCDD/Fs and dl-PCBs through inhalation (ADD) for residents located north of the airport were the highest (10.9 to 3434 fg WHO-TEQ/kg BW/day and average: 597 fg WHO-TEQ/kg BW/day). Residents located west of the airport faced lower health risks (13-123 fg WHO-TEQ/kg BW/day and average: 39 fg WHO-TEQ/kg BW/day). Residents south of the airport were exposed to a minimum of 6.2-107 fg WHO-TEQ/kg BW/day, with an average of 28 fg WHO-TEQ/kg BW/day. The maximum and average ADD values for residents north of the airport exceeded 10% of the tolerable daily intake (TDI) recommended by the WHO (100-400 fg WHO-TEQ/kg BW/day). In comparison, all the ADD values for residents located west and south of the airport were less than and within 10% of the TDI.
2017 年至 2020 年，使用装有聚氨酯泡沫（PUF）圆盘的被动空气采样器，以 3 个月为采样间隔，在位于岘港机场以北、西和南的三个居民区测定了多氯二苯并对二恶英/多氯二苯并呋喃（PCDD/Fs）和类似二恶英的多氯联苯（dl-PCBs）的空气污染水平。使用世卫组织毒性当量因子（WHO-TEFs）计算的 PCDD/Fs 和 dl-PCBs 的总毒性当量（∑TEQs），机场以北地区最高（134 至 10610 fg 世卫组织-TEQ/PUF 天，平均为 1108 fg 世卫组织-TEQ/PUF 天）。机场以西地区的∑TEQs 较低，范围在 159 至 381 fg 世卫组织-TEQ/PUF 天，平均为 230 fg 世卫组织-TEQ/PUF 天。机场以南地区的∑TEQs 最低，范围在 76 至 331 fg 世卫组织-TEQ/PUF 天，平均为 152 fg 世卫组织-TEQ/PUF 天。机场以北地区的建筑活动，包括挖掘和运输含二恶英的土壤，增加了空气中的 PCDD/F 和 dl-PCB 污染和健康风险。位于机场以北的居民通过吸入摄入的 PCDD/Fs 和 dl-PCBs 的平均日剂量（ADD）最高（10.9 至 3434 fg 世卫组织-TEQ/kg BW/天，平均为 597 fg 世卫组织-TEQ/kg BW/天）。位于机场以西的居民面临的健康风险较低（13-123 fg 世卫组织-TEQ/kg BW/天，平均为 39 fg 世卫组织-TEQ/kg BW/天）。位于机场以南的居民受到的暴露最低，为 6.2-107 fg 世卫组织-TEQ/kg BW/天，平均为 28 fg 世卫组织-TEQ/kg BW/天。机场以北居民的最大和平均 ADD 值超过了世卫组织建议的可耐受每日摄入量（TDI）的 10%（100-400 fg 世卫组织-TEQ/kg BW/天）。相比之下，机场以西和以南所有居民的 ADD 值均低于或低于 10%的 TDI。
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