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Risk Assessment Analysis Procedure to Control Pollution Problems in Euphrates Region in
Iraq.
Dr. Mohammad A.M. Al-Tufaily
Babylon University-College of Engineering
Sabreen Lateef Kareem
Babylon University-College of Engineering
Abstract
The present study was submitted an Environmental Risk Assessment process which is based on four steps defined by both National Academy of Science and the EPA. These are : Hazard Identification, Exposure Assessment, Toxicity Assessment, and Risk Characterization. It were taken into account Four environmental media (water, industrial waste water, soil and air).
At first the concentration of some heavy metal (Hg, Pb, Zn, Ni, and Cd ) was measured in water media at two locations(Hilla city, near textile factory intake and at AL-Hashimya city) and concentration of (Hg, Pb, Zn, Cr, , and Cd) in industrial waste water discharged from (Hilla Textile Factory , General Company for Chemical Industries, Hilla Educational Hospital , and Hilla Slaughter), and concentration of (Hg, Pb, Zn, Ni, Cd, C6H6 and C7H8) in soil media at (Hilla city, near oil station at AL-Bakarly and at AL-Hashimya city). Samples of these environmental media were collected and analyzed for period starting from November 2009 until May 2010. For air media the concentration of lead was taken from two previous studied conducted at Hilla city. Based on these test results and data gathered, the potential human health risk assessment based on EPA model was used to calculate different types of Intake through (ingestion, dermal) for water, industrial waste water , and soil media and (ingestion, dermal and inhalation) for air media , noncarcinogen Hazard Index (HI) and carcinogen Risk (R) resulted from these exposure routes was also calculated.
The results showed that for water and industrial waste water media media all values of ?HI obtained higher than EPA allowable limit (1) and the max.value of ? HI in water was 35.5929 (child) at AL-Hashimya city which resulted mainly from dermal contact of mercury in water which was 13.433 and max values of HI was 14.03 at Hilla city also from dermal contact of mercury. For industrial waste water media, max value of ?HI was 310.5485 (child) at General Company for Chemical Industries this attributed mainly for dermal contact of mercury.
In Hilla Textile Factory and Hilla Educational Hospital max value of ?HI was 33.2386 (child), 45.5625 respectively attributed to dermal contact of chromium which was 13.128 , 24.877 respectively.
For soil media two types of risk generated and max value of ?R was 6.38X106(child)at Hilla city near oil station at AL-Bakarly resulted mainly from ingestion of benzene ,. For air also two types of risk was found but max value of ?R inhalation was 161x10-6 (child) at Benzene station near Mergan .
- وصف الــ Tags لهذا الموضوع
- Environmental Risk Assessment
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