HEAVY METALS POLLUTION AND RISK ASSESSMENT at SOIL AND AIR IN THE VICINITY OF ELECTRIC POWER STATION WEST OF ALEXANDRIA CITY, EGYPT | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 5, Volume 28, Issue 8, August 2003, Page 6487-6503 PDF (16.39 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2003.245098 | ||||
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| Authors | ||||
| EI. A. Shalaby,; I. H. Saleh | ||||
| Department of Environmental Studies, Institute of Graduate Studies a d Research, Alexandria University 163 Elhorreya avenue, P.O. Box 832, Eishatby, Alexandria, Egypt. | ||||
| Abstract | ||||
| Levels of total amounts of heavy metals (As. Cd. Cu, Cr. Ni. Hg and Zn) have been measured in both soit and air samples in Ihe vicinity of electric power stati n (EPS) at Sidi Kirayer, west of Alexandria. to assess the quality ot soil and air at th s area. The chemical fraclions of these metals in soils has been measured. The (I k assessment has been carried out to define the impact of the present levels of Ihese metals on human health. The analytical data showed that the air of the studied area is highly polluted by Cr, Cd and Cu as compared with the unpolluted air. I The results indicated Ihat Ihere were marked decreases in the levels 9f metals with the distance from the electric power staticn (EPS). The highest reccroed levels of total As. Cd. Cu, Cr, Ni, Hg and Zn were found in the soil of Ihe upper layer (0·25cm) of site No. 1 and were, on the average, 0.5, 1.4, 1.8. 3.5. 5.4, 0.9 and 58 mg/1(9 SOil. respectively. The results also indicated that most of rnetats are accumulated in the surface soil/ayer and the downward mobility of metals in the soil profile is negligible. The lowest recorded levels of total metals in soils were found ir the deepest layer (50-100 em) of sile NO.4 and were 0.008, 0.11, 0.085, 0.08. 0.5, 0.03 and 10.5mg kg-1 soil for As, Cd, Cu. Cr, Ni. Hg and Zn, respectively. TheSr value are considered the background levels of total metals in the studied soil. Th~ metals fractionation of the studied soils showed thai most of Cd, Ni and Zn occurred i the carbonate fraction, while Cu and Cr occurred in the organic and sulfide fraction. Risk assessment of heavy metals in air and soil indicated thai the iohak ..• no pathway is Ihe most effective for carcinogenic hazardous metals. Cadmium was th highest regarding the non-carcinogenic effects which had Health quoelion of 80 in ai . On the other hand, chromium was the highest among the measured carcinogeni metals in this work. The risk estimaled, due to the recorded Cr level. was 53.04 cases per million. | ||||
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