School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
J Hazard Mater. 2015;283:439-46. doi: 10.1016/j.jhazmat.2014.09.044. Epub 2014 Sep 28.
Recycling process for waste TV sets mainly consists of dismantling, printed wiring board (PWB) heating, PWB recycling, and plastic crushing in formal recycling plant. Polybrominated diphenyl ethers (PBDEs) contained in waste TV sets are released to indoor air. Air samples at 4 different workshops were collected to measure the PBDEs concentrations in both gaseous and particulate phases. The mean concentrations of ∑PBDEs in indoor air were in the range of 6780-2,280,000 pg/m(3). The highest concentration in gaseous phase (291,000 pg/m(3)) was detected in the PWB heating workshop. The ∑12PBDEs concentrations in PM2.5 and PM10 at the 4 workshops ranged in 6.8-6670 μg/g and 32.6-6790 μg/g, respectively. The gas-particle partitioning of PBDEs was disrupted as PBDEs were continuously released during the recycling processes. Occupational exposure assessment showed that only the exposure concentration of BDE-47 (0.118 μg/kg/day) through inhalation in the PWB heating workshop for workers without facemask exceeded the reference dose (0.1 μg/kg/day), posing a health hazard to workers. All the results demonstrated that recycling of TV sets was an important source of PBDEs emission, and PBDEs emission pollution was related to the composition of TV sets, interior dust, and recycling process.
废旧电视机的回收过程主要包括拆解、印刷电路板（PWB）加热、PWB 回收和塑料粉碎，在正规的回收工厂中进行。废旧电视机中含有的多溴联苯醚（PBDEs）会释放到室内空气中。在 4 个不同的车间采集空气样本，以测量气态和颗粒相中的 PBDEs 浓度。室内空气中∑PBDEs 的平均浓度范围为 6780-2280000pg/m³。在 PWB 加热车间检测到的气态相（291000pg/m³）浓度最高。在 4 个车间中，PM2.5 和 PM10 中∑12PBDEs 浓度分别为 6.8-6670μg/g 和 32.6-6790μg/g。由于在回收过程中 PBDEs 不断释放，PBDEs 的气粒分配被打乱。职业暴露评估显示，在没有口罩的 PWB 加热车间，工人仅通过吸入 BDE-47（0.118μg/kg/天）的暴露浓度就超过了参考剂量（0.1μg/kg/天），对工人健康构成危害。所有结果表明，电视机的回收是 PBDEs 排放的一个重要来源，而 PBDEs 排放污染与电视机的组成、室内灰尘和回收过程有关。
