Assessment of noise and heavy metals (Cr, Cu, Cd, Pb) in the ambience of the production line for recycling waste printed circuit boards.

The crush-pneumatic separation-corona electrostatic separation production line provides a feasible method for industrialization of waste printed circuit boards (PCBs) recycling. To determine the potential environmental contamination in the automatic line workshop, noise and heavy metals (Cr, Cu, Cd, Pb) in the ambience of the production line have been evaluated in this paper. The mean noise level in the workshop has been reduced from 96.4 to 79.3 dB since the engineering noise control measures were employed. Noise whose frequency ranged from 500 to 1000 Hz is controlled effectively. The mass concentrations of TSP and PM(10) in the workshop are 282.6 and 202.0 μg/m(3), respectively. Pb (1.40 μg/m(3)) and Cu (1.22 μg/m(3)) are the most enriched metals in TSP samples followed by Cr (0.17 μg/m(3)) and Cd (0.028 μg/m(3)). The concentrations of Cu, Pb, Cr, and Cd in PM(10) are 0.88, 0.56, 0.12, and 0.88 μg/m(3), respectively. Among the four metals, Cr and Pb are released into the ambience of the automatic line more easily in the crush and separation process. Health risk assessment shows that noncancerous effects might be possible for Pb (HI = 1.45), and noncancerous effects are unlikely for Cr, Cu, and Cd. The carcinogenic risks for Cr and Cd are 3.29 × 10(-8) and 1.61 × 10(-9), respectively. It indicates that carcinogenic risks on workers are relatively light in the workshop. These findings suggest that this technology is advanced from the perspective of environmental protection in the waste PCBs recycling industry.

[1]  Ming H Wong,et al.  Heavy metals concentrations of surface dust from e-waste recycling and its human health implications in southeast China. , 2008, Environmental science & technology.

[2]  E. De Miguel,et al.  Geochemistry and risk assessment of street dust in Luanda, Angola: A tropical urban environment , 2005 .

[3]  George Rachiotis,et al.  Occupational exposure to noise, and hearing function among electro production workers. , 2006, Auris, nasus, larynx.

[4]  Brett H Robinson,et al.  E-waste: an assessment of global production and environmental impacts. , 2009, The Science of the total environment.

[5]  B. Gullett,et al.  Characterization of air emissions and residual ash from open burning of electronic wastes during simulated rudimentary recycling operations , 2007 .

[6]  E. Zeng,et al.  Law enforcement and global collaboration are the keys to containing e-waste tsunami in China. , 2009, Environmental science & technology.

[7]  Xu Zhen-ming.  Pulverization Characteristics and Pulverizing of Waste Printed Circuit Boards(Printed Wiring Boards) Based on Resource Utilization , 2007 .

[8]  Guoying Sheng,et al.  The major components of particles emitted during recycling of waste printed circuit boards in a typical e-waste workshop of South China , 2010 .

[9]  Jia Li,et al.  Environmental friendly automatic line for recovering metal from waste printed circuit boards. , 2010, Environmental science & technology.

[10]  Jurij Prezelj,et al.  Noise Generation by Vacuum Cleaner Suction Units , 2008 .

[11]  A. Piccolo,et al.  Evaluation and analysis of the environmental noise of Messina, Italy , 2005 .

[12]  Jiamo Fu,et al.  Atmospheric levels and cytotoxicity of PAHs and heavy metals in TSP and PM2.5 at an electronic waste recycling site in southeast China , 2006 .

[13]  D. Jerwood,et al.  Occupational noise exposure and hearing loss of workers in two plants in eastern Saudi Arabia. , 2001, The Annals of occupational hygiene.

[14]  K. C. C H E U N G, † A N D M I N,et al.  Heavy Metals Concentrations of Surface Dust from e-Waste Recycling and Its Human Health Implications in Southeast China , 2008 .

[15]  Li Chen,et al.  Receptor modeling of PM2.5, PM10 and TSP in different seasons and long-range transport analysis at a coastal site of Tianjin, China. , 2010, The Science of the total environment.

[16]  Min Qiao,et al.  Identification of ah receptor agonists in soil of E-waste recycling sites from Taizhou area in China. , 2008, Environmental science & technology.

[17]  Ghorbanali Mohammadi.  Hearing conservation programs in selected metal fabrication industries , 2008 .

[18]  Lin Chun-ye.  Estimates of the exposed dermal surface area of Chinese in view of human health risk assessment , 2008 .

[19]  Jie Guo,et al.  Recycling of waste printed circuit boards: a review of current technologies and treatment status in China. , 2009, Journal of hazardous materials.

[20]  Jia Li,et al.  Recycle technology for recovering resources and products from waste printed circuit boards. , 2007, Environmental science & technology.

[21]  C. Samara,et al.  Size distribution of airborne particulate matter and associated heavy metals in the roadside environment. , 2005, Chemosphere.

[22]  Liu Min,et al.  Primary research on health risk assessment of heavy metals in road dust of Shanghai. , 2009 .