School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
J Environ Sci (China). 2014 Oct 1;26(10):2018-26. doi: 10.1016/j.jes.2014.08.003. Epub 2014 Sep 9.
A typical Printed Circuit Board (PCB) manufacturer was chosen as the object of this study. During PCB processing, fine particulate matter and heavy metals (Cu, Zn, Pb, Cr, Cd and Ni) will be released into the air and dust, which then impact workers' health and the environment. The concentrations of total suspended particle (TSP), PM10 and PM2.5 in the off-site were 106.3, 90.0 and 50.2μg/m(3), respectively, while the concentrations of TSP, PM10 and PM2.5 in the workshops ranged from 36.1 to 365.3, from 27.1 to 289.8 and from 22.1 to 212.3μg/m(3), respectively. Almost all six of the heavy metals were detected in all of the particle samples except Cd. For each workshop, it was obvious that Zn was the most enriched metal in TSP, followed by Cu>Pb (Cr)>Ni>Cd, and the same trend was found for PM10 and PM2.5. In the dust samples, Cu (which ranged from 4.02 to 56.31mg/g) was the most enriched metal, followed by Zn, Cr, Pb, Ni and Cd, and the corresponding concentrations ranged from 0.77 to 4.47, 0.37 to 1.59, 0.26 to 0.84, 0.13 to 0.44 and nd to 0.078mg/g, respectively. The health risk assessment showed that noncancerous effects are unlikely for Zn, Pb, Cr, Cu, Cd and Ni. The carcinogenic risks for Cd and Ni were all lower than 10(-6), except for Cr. This result indicates that carcinogenic risks for workers are relatively possible in the workshops. These findings suggest that this technology is advanced from the perspective of environmental protection in the waste PCB's recycling industry.
选择了一家典型的印制电路板（PCB）制造商作为本研究的对象。在 PCB 加工过程中，细颗粒物和重金属（Cu、Zn、Pb、Cr、Cd 和 Ni）将释放到空气中和灰尘中，从而影响工人的健康和环境。场外总悬浮颗粒物（TSP）、PM10 和 PM2.5 的浓度分别为 106.3、90.0 和 50.2μg/m3，而车间的 TSP、PM10 和 PM2.5 的浓度范围分别为 36.1 至 365.3、27.1 至 289.8 和 22.1 至 212.3μg/m3。除了 Cd 之外，几乎所有六个重金属都在所有颗粒样本中被检测到。对于每个车间，很明显 Zn 是 TSP 中最富集的金属，其次是 Cu>Pb（Cr）>Ni>Cd，PM10 和 PM2.5 也存在相同的趋势。在粉尘样本中，Cu（范围为 4.02 至 56.31mg/g）是最富集的金属，其次是 Zn、Cr、Pb、Ni 和 Cd，相应的浓度范围为 0.77 至 4.47、0.37 至 1.59、0.26 至 0.84、0.13 至 0.44 和 nd 至 0.078mg/g。健康风险评估表明，Zn、Pb、Cr、Cu、Cd 和 Ni 不太可能产生非癌症影响。除 Cr 外，Cd 和 Ni 的致癌风险均低于 10-6。这一结果表明，在车间中，工人的致癌风险相对较高。这些发现表明，从环保角度来看，这项技术在废弃 PCB 回收行业是先进的。
