广州市室内尘土中多溴联苯醚的分布特点及来源

随机采集了广州市46个家庭和12个办公室内尘土样品,同时采集了17个室外尘土样品、2个电视机和2个电脑尘土样品并分析了室内尘土中多溴联苯醚(PBDEs)的含量、单体分布及来源.结果表明,家庭尘土中∑10PBDEs(BDE28,47,66,85,99,100,153,154,183,209之和)的含量为 564.3~9654ng/g,中值和均值分别为 2686,3407ng/g;办公室尘土中∑10PBDEs 的含量为 1737~4408ng/g,中值和均值分别为3133,3179ng/g.室内尘土中PBDEs的最主要单体为BDE209,分别占家庭尘土和办公室尘土∑10PBDEs的97.4%和99.0%.BDE47、99和183在室内尘土中含量也较高.大多数室内尘土中∑10PBDEs的含量高于室外,说明室内可能有重要的PBDEs释放源.室内尘土中PBDEs的主要工业品来源为十溴联苯醚,五溴联苯醚次之,八溴联苯醚较少.

Distribution and possible sources of PBDEs in indoor dust in Guangzhou City

Dust samples were collected randomly from forty-six houses, twelve offices, seventeen outdoor sites, two televisions and two computers in Guangzhou City to determine the concentrations, distribution and possible sources of PBDEs in indoor dust. Concentration of Σ_(10)PBDEs (sum of BDE28,47, 66, 85, 99,100, 153,154, 183, and 209) varied from 564.3 to 9654ng/g (median 2686ng/g, mean 3407ng/g) for house dust, and from 1737 to 4408 ng/g (median: 3133ng/g; mean: 3179ng/g) for office dust. BDE209 was the dominant congener detected, with an average contribution of 97.4% and 99.0% to Σ_(10)PBDEs for house dust and office dust, respectively, whereas BDE47, 99 and 183 were the most abundant congeners of Σ_9PBDEs (BDE209 excluded). Σ_(10)PBDEs concentration in indoor dust was higher than that in the outdoor dust, indicating possible indoor emission sources for PBDEs indoors. The predominant commercial products source for PBDEs in indoor dust was Deca-BDE formulations, followed by Penta-BDE, and the contribution of Octa-BDE was minimal.