[PBDEs Levels in House Dust and Human Exposure to PBDEs via Dust Ingestion in Hangzhou]

In order to evaluate the pollution degree of the dust in Hangzhou City, the indoor dust samples of 19 offices, families and students' dormitories were collected from August to March in 2013 at Hangzhou for evaluating the pollution level of polybrominated diphenyl ethers (PBDEs), to analyze concentrations of 14 PBDEs congeners and congener distribution as well as the possible influencing factors, and to estimate the PBDEs exposure levels of adults and children through the dust intake. The results showed that the average ∑₁₄PBDEs of office was 9.28×10² ng·g^-1, and the median was 1.03×10³ ng·g^-1; the average ∑₁₄PBDEs of family was 7.83×10² ng·g^-1, and the median was 9.11×10² ng·g^-1; the average ∑₁₄PBDEs of student dormitory was 4.07×10² ng·g^-1, and the median was 4.03×10² ng·g^-1. The pollution level of the office was higher than that of the living environment. BDE-209 was the largest monomer, and its contribution was 75.48%, followed by BDE-190, BDE-154 and BDE-71.PBDEs exposure levels of adults and children by dust intake were 13.12-32.63 ng·d^-1 and 32.40-54.54 ng·d^-1, respectively. Children's PBDEs exposure in the dust was higher than that of the adults, mainly because the average dust intake of children was higher than that of adults. The analysis showed that the PBDEs from indoor dust intake was a potential health hazard, and the biggest potential harm to children.