| Abstract: |
One hundred forty four water and sediment samples (72 each) aswell as (101) fish samples of 5 different species were collected from6 different localities in Al-Manzala lake along the four seasons of the yearsAll samples were prepared for detecting lead, mercury, arsenic, cadmium,and strontium by using Perkin - Elmer spectrophotometer Model 2380equipped with MHS-10 hydride generation system. The obtained results were:(1) Water:The seasonal mean concentrations of lead,mercury, arsenic, cadmiumand strontium were ranged from 0.360 to 0.156, 0.040 to 0.046, 0.001 to0.016,0.009 to 0.013 and 0.087 to 0.290 (mg/L), respectively.(2) Sediment:The seasonal mean concentrations of lead, mercury, arsenic,cadmiumand strontium were ranged from 1.977 to 3.175, 0.357 to 0.384, 0.123 to0.157, 1.287 to 1.695 and 71.680 to 86.280 (p.-g/g dry wt.), respectively.(3) Fish tissues:(a) Muscles:The seasonal mean concentrations of lead, mercury, arsenic, cadmiumand strontium in different species were ranged from 0.123 to 0.760, 0.028
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