Nguyen Anh Viet, Van Vu Tu, Pham Chi Linh Thi, Nguyen Viet Ngoc, Ta Nguyen Thuy, Hoang Anh Quoc, Minh Tu Binh, Tran Tri Manh
University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam.
Vietnam Institute of Industrial Chemistry, 2 Pham Ngu Lao, Hoan Kiem, Hanoi, Vietnam.
Environ Sci Pollut Res Int. 2023 May;30(22):63175-63184. doi: 10.1007/s11356-023-26558-5. Epub 2023 Mar 24.
In the present study, distribution characteristics of ten typical phthalic acid esters (PAEs) were investigated in 90 air samples collected from the urban areas in Hanoi, Vietnam from May to August 2022. The total concentrations of PAEs in indoor and ambient air samples were in the range of 320-4770 ng/m and 35.9-133 ng/m, respectively. Total concentrations of PAEs in indoor air were about one order of magnitude higher than those in ambient air. Among PAEs studied, di-(2-ethyl)hexyl phthalate (DEHP) was measured at the highest levels in all air samples, followed by di-n-octyl phthalate (DnOP) and di-n-butyl phthalate (DnBP). The PAEs concentrations in air samples collected from laboratories at nighttime were significantly higher than those during daytime (p < 0.05). Meanwhile, the distributions of PAEs in various micro-environments in the same house are no statistically significant difference. The median exposure doses of PAEs through inhalation for adults and children were 248 and 725 ng/kg-bw/d, respectively. These exposure levels were still lower than the respective reference doses (RfD) proposed by the US EPA for selected compounds such as diethyl phthalate (DEP), DnBP, and DEHP.
在本研究中，对2022年5月至8月从越南河内市区采集的90个空气样本中10种典型邻苯二甲酸酯（PAEs）的分布特征进行了调查。室内和环境空气样本中PAEs的总浓度分别在320 - 4770 ng/m³和35.9 - 133 ng/m³范围内。室内空气中PAEs的总浓度比环境空气中的高约一个数量级。在所研究的PAEs中，邻苯二甲酸二（2-乙基）己酯（DEHP）在所有空气样本中的含量最高，其次是邻苯二甲酸二正辛酯（DnOP）和邻苯二甲酸二正丁酯（DnBP）。夜间从实验室采集的空气样本中PAEs浓度显著高于白天（p < 0.05）。同时，同一房屋内不同微环境中PAEs的分布无统计学显著差异。成人和儿童通过吸入PAEs的中位暴露剂量分别为248和725 ng/kg-bw/d。这些暴露水平仍低于美国环境保护局（US EPA）针对某些化合物（如邻苯二甲酸二乙酯（DEP）、DnBP和DEHP）提出的相应参考剂量（RfD）。
