Characterization of phthalates in residential house dust and their transfer routes

QIAO Yaqi; HUANG Lihui

doi:10.7524/j.issn.0254-6108.2020020601

2020 Volume 39 Issue 6

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QIAO Yaqi, HUANG Lihui. Characterization of phthalates in residential house dust and their transfer routes[J]. Environmental Chemistry, 2020, (6): 1523-1529. doi: 10.7524/j.issn.0254-6108.2020020601

Citation:

QIAO Yaqi, HUANG Lihui. Characterization of phthalates in residential house dust and their transfer routes[J]. Environmental Chemistry, 2020, (6): 1523-1529. doi: 10.7524/j.issn.0254-6108.2020020601

Characterization of phthalates in residential house dust and their transfer routes

QIAO Yaqi¹,
HUANG Lihui^1,2,3, ,

1. Department of Environmental Engineering, School of Water and Environment, Chang'an University, Xi'an, 710054, China;
2. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710054, China;
3. Department of Building Technology and Science, Tsinghua University, Beijing, 100084, China

Corresponding author: HUANG Lihui, huanglh@chd.edu.cn
Received Date: 06/02/2020

Fund Project: Supported by the Natural Science Foundation of China (21607015), the Science & Technology Support Foundation of Shaanxi Province (2016JQ2008) and the Fundamental Research Funds for the Central Universities (300102299101).

Abstract

House dust samples were collected in the living room and bedroom of forty residences in Beijing in both summer and winter. The concentrations of 7 phthalates in these samples were characterized. The results showed that the major phthalates in house dust were DIBP (39.6 ng·mg^-1, geometric mean concentration, thereafter), DBP (38.7 ng·mg^-1) and DEHP (418.5 ng·mg^-1). The concentrations of dust-borne DIBP, DBP and DEHP were positively associated with temperature, relative humidity and ventilation rate (P<0.005). Elevated temperature and improved ventilation could accelerate the source emission rates of phthalates, resulting in the accumulation of airborne phthalates, and ultimately increase the concentration of dust-borne phthalates through the air-mediated transfer; whereas higher humidity could expedite the mass transfer of phthalates from air to dust, leading to the higher concentration of dust-borne phthalates. Due to the combined effects of above factors, significantly higher concentrations of dust-borne phthalates were found in the summer (P<0.0001). The results also suggested that phthalates transport from source materials to house dust via two routes:air-mediated indirect transfer and direct transfer from source to dust on source surface. As a result, the concentrations of dust-borne phthalates were closely associated with surface material. The residence time of dust was also found to impact the concentrations of dust-borne phthalates. Therefore, it is necessary to specify the type of dust, collection location and surface material, so that accurate exposure assessment can be conducted using measurement data.
- phthalates,
- house dust,
- DEHP,
- DIBP,
- DBP

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Characterization of phthalates in residential house dust and their transfer routes

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