ASSESSMENT OF SOME POLLUTANTS PRODUCED FROM INDUSTRIAL ACTIVITIES AT DAMIETTA GOVERNORATE – EGYPT
The present research concerned with assessing some pollutants produced from industrial activities in Damietta Governorate. Twenty-two sampling sites have been selected representing the aquatic environment at the study area. Representative samples of water and sediment were collected from the different localities and over two seasons, Summer 2004 and Winter 2005. Physico-chemical characteristics as well as heavy metals (Zn, Cu, Pb, Mn and Cd) were analyzed for both water and sediment samples.
Dissolved oxygen concentration ranged between 0 to 9.9 mg/L with an average value of 4.8 ± 0.8 mg/L. The BOD concentrations ranged between 0.9 and 124 mg/L, with a mean value of 35.4 ± 6.3 mg/L. Chemical oxygen demand concentrations ranged from 6.56 to 1685 mg/L, with an average value of 989.3 ± 740.16 mg/L. However, the highest mean value was recorded in Winter (1630.6 ± 44.6 mg/L), meanwhile there is a concentration drop of COD during Summer whereas the values ranged between 6.56 and 1574 mg/L.
The total organic carbon concentration in sediment varied between 0.13 and 15.6 mg/g dry wt., with an average value of 3.53 ± 0.15 mg/g dry wt. The concentration of the studied heavy metals in water followed concentration abundance as Pb < Cd < Zn < Mn <Cu. While, heavy metals concentration in sediment samples were found according to the following order: Zn < Mn < Pb < Cd < Cu. Therefore, an effective
pollution control for pollution sources should be implemented in order to prevent environmental deterioration.
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pollution control for pollution sources should be implemented in order to prevent environmental deterioration.
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