State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Chemosphere. 2019 Jan;214:379-388. doi: 10.1016/j.chemosphere.2018.09.130. Epub 2018 Sep 21.
In this work, the concentrations of polybrominated diphenyl ethers (PBDEs) were determined in air, dust and fly ash samples from three legal waste electrical and electronic equipment dismantling plants with strict pollution controls. The risks posed by PBDEs to workers at the plants were assessed. The atmospheric concentrations of PBDEs in the different e-waste recycling workshops were 0.58-2.89 × 10 ng/m, and predominantly distributed in the particle phase (90.7%-99.9%). The concentrations of the PBDEs in the floor dust and fly ash samples from bag-type dust collectors in different workshops were 2.39-125 μg/g, 5.84-128 μg/g, respectively. The contributions of BDE-209 in air, floor dust and fly ash samples were 84.0%-97.9%, 11.2%-95.3% and 74.0%-94.9%, respectively, indicating that deca-BDE commercial formulations were their major sources. Daily exposure to PBDEs was also lower than has been found for workers in other recycling workshops. Human exposures to BDE-47, BDE-99, BDE-153, and BDE-209 were all below the levels considered to pose appreciable risks. Dust ingestion was the main exposure route for manual recyclers, and inhalation was the main exposure route for waste transportation workers. The results of this study indicate that PBDEs emissions and risks are lower in modern, legal e-waste recycling facilities with effective pollution controls. However, the effectiveness of the pollution controls need to be further researched in plastic crushing areas.
本工作中,测定了 3 家采用严格污染控制措施的合法废弃电气电子设备拆解工厂的空气、粉尘和飞灰样品中的多溴二苯醚 (PBDEs) 浓度,评估了 PBDEs 对工厂工人造成的风险。不同电子废物拆解车间的大气中 PBDEs 浓度为 0.58-2.89×10 ng/m,主要分布在颗粒物相中(90.7%-99.9%)。不同车间袋式集尘器收集的地面粉尘和飞灰中 PBDEs 的浓度分别为 2.39-125μg/g、5.84-128μg/g。空气、地面粉尘和飞灰样品中 BDE-209 的贡献率分别为 84.0%-97.9%、11.2%-95.3%和 74.0%-94.9%,表明十溴联苯醚商用制剂是其主要来源。PBDEs 的日暴露量也低于其他回收车间工人的暴露量。人体对 BDE-47、BDE-99、BDE-153 和 BDE-209 的暴露均低于被认为存在明显风险的水平。对于手工回收者,粉尘摄入是主要暴露途径,而对于废物运输工人,吸入是主要暴露途径。本研究结果表明,采用有效污染控制措施的现代化、合法的电子废物回收设施中,PBDEs 的排放和风险较低。然而,需要进一步研究塑料破碎区污染控制的有效性。