Al-Najebia power station plant effluents and it's impact on physico-chemical characteristics of Garmat Ali Canal

الملخص EN

The physico-chemical characteristics and water quality near thermal effluents of Al-Najebia electrical power station on Garmat Ali canal have been investigated.

Seasonal samples were taken through low tide (from summer, 2007 till winter, 2008). Three stations were chosen, serious one was S2 (located closer to the thermal discharge point), these effects were extended to 625 m east far from S2.

The effects were reached the highest through summer season at S2 than S3.

The highest water temperature was 42C° and the differences between high water temperature between S2 and S3 was 9C° through summer season, high pH values and salinity were 8.

3 and 2.

2 (ppt) at S2 respectively.

Very sharp decline of dissolved oxygen (3.

9 mg / l) was noted at S2 and nitrite values (0.

23 as μg- at N / l) was noted at S1, and high value of BOD was 4.6 mg / l at S2, the highest value of alkalinity was 135 mg / l at S2 through summer season.

Maximum values of hardness (mg / l as CaCO3) calcium and magnesium (mg / l) were 760, 425 and 365 respectively ; TDS was 1710 mg / l at S2 through summer season.

Maximum values of nitrite and nitrate (as μg- at N / l) were 1.

30 and 35 at S2 due to many bio-chemical reactions with were happened during high water temperatures.