Experimental approaches and analytical technique for determining heavy metals in fallen dust at ferrosilicon production factory in Edfu, Aswan, Egypt |
| |
| Authors: | M E Soltan H M Rageh N M Rageh M E Ahmed |
| |
| Institution: | (1) Department of Chemistry, Faculty of Science at Aswan, South Valley University, Egypt;(2) Department of Chemistry, Faculty of Science at Qena, South Valley University, Egypt;(3) Department of Environment, Egyptian Ferroalloy, Edfu, Aswan, Egypt |
| |
| Abstract: | In this study aimed to evaluate the pollution extent of metals and nonmetals inside and outside the ferrosilicon production
factory in Edfu, Aswan, Egypt, raw materials (quartz, cokes, iron oxides), ferrosilicon alloy, silica fume, dust and suspended
dust (at different sites) samples were collected from the factory, and fallen dust samples were collected from outside the
factory, horizontally (at different sites and different distance and directions) and vertically (at different floors in the
selected buildings). Gravimetric methods, X-ray fluorescence (XRF), flame photometer, wide range carbon determinator and atomic
absorption spectroscopy tools were used for elements determination. The results indicating that the fallen dust and its element
contents on southern factory walls being higher than those on eastern factory walls may be due to the nature of the dusts
and effects of wind force and wind direction. Fallen dust levels in different regions outside the factor were found to be
affected by the distance, direction and floors. The nature of dust samples was affected by gravity and the suspended dust
in different factory units depended on the work capacity and method of handling materials by personnel in different production
units. Silica fume was a complicated problem, had dangerous effect against the workers' health, and was characterized by high
concentrations of SiO2 (90.6%∼93.6%) and heavy metals (Mn, 420.6×10−6; Fe, 2354×10−6∼2685×10−6; Co 80.7×10−6∼101.6×10−6 and Ni, 5.3×10−6∼6.05×10−6). The TSP (Total Suspended Particulate) levels in all factory units were higher than the recommended air quality value (70
μg/m3) under Egyptian law. The effect of ferrosilicon factory fallen dust on the surrounding regions decreased with increasing
distance between the factory and these regions. The suspended dust samples in the factory units and their components greatly
exceeded national and international standards, so health and environmental criteria must be enforced on these units. |
| |
| Keywords: | Air pollution Dust Heavy metals Fallen dust |
| 本文献已被 CNKI 万方数据 PubMed SpringerLink 等数据库收录！ |
|
