State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.
Environ Int. 2010 Aug;36(6):535-41. doi: 10.1016/j.envint.2010.04.005. Epub 2010 May 8.
Brominated flame retardants (BFRs) were examined in house dust from the electronic waste (e-waste) recycling and urban areas of South China. The concentrations of polybrominated diphenyl ethers (PBDEs) were in the range of 227-160,000 ng/g in the e-waste recycling area and 530-44,000 ng/g in the urban area. These values were much higher than other BFRs, except for novel decabromodiphenyl ethane (DBDPE) whose value of 100-47,000 ng/g was dominant in approximately 1/4 of the samples from the urban area. Urban dust PBDE levels were generally higher than those in many European and Asian countries and comparable to the values found in North America. Urban dust DBDPE levels were higher than those of other areas in the world. The distinct dust BFR profiles observed in the two studied areas were reflective of activities in these areas (electronics industry vs. e-waste recycling). The presence of BDE202, as well as the BDE197 to BDE201 and the nona-BDEs to deca-BDE ratios in the dust samples from the studied areas were probably indicative of environmental degradation of deca-BDE. The estimated daily intakes (EDIs) of average adult and toddler via house dust ranged from 37.0 to 304 ng/day for PBDEs and from 3.01 to 87.6 ng/day for all other BFRs in the studied areas. The EDIs via house dust were much higher than those via other indoor pathways (air, fish, human milk, and toys). Despite the potentially low deleterious risk of PBDE exposure via house dust as suggested by the hazard quotients, this exposure pathway should be of great concern because of the higher BFR exposures for children and the presence of other BFRs (such as DBDPE) which have not yet been fully investigated.
溴化阻燃剂 (BFRs) 在来自中国南方电子废物 (e-waste) 回收和城区的室内灰尘中进行了检测。电子废物回收区多溴二苯醚 (PBDEs) 的浓度范围为 227-160,000ng/g，城区为 530-44,000ng/g。这些值远高于其他 BFRs，除了新型十溴二苯乙烷 (DBDPE)，其 100-47,000ng/g 的浓度在城区大约 1/4 的样本中占主导地位。城区灰尘中的 PBDE 水平普遍高于许多欧洲和亚洲国家，与北美的数值相当。城区灰尘中的 DBDPE 水平高于世界其他地区。在这两个研究区域观察到的明显的灰尘 BFR 分布反映了这些区域的活动（电子行业与电子废物回收）。研究区域灰尘样本中 BDE202 的存在以及 BDE197 到 BDE201 和九溴到十溴的比值可能表明十溴的环境降解。通过室内灰尘，平均成年人和幼儿的估计每日摄入量 (EDI) 范围为 PBDEs 的 37.0 至 304ng/天，所有其他 BFRs 的 3.01 至 87.6ng/天。通过室内灰尘的 EDI 远高于通过其他室内途径（空气、鱼类、人乳和玩具）的 EDI。尽管根据危害商数表明通过室内灰尘暴露于 PBDE 的潜在危害较小，但由于儿童 BFR 暴露较高以及存在尚未充分研究的其他 BFRs（如 DBDPE），因此这种暴露途径应引起极大关注。
