Sediment
Sediment samples were taken from each zone, using the Ekman grab sampler. The sediment, samples were air dried, sieved with 230 mesh (600 μ) to separate only big materials and pebbles from the sediment and digested with 4:1 mixture of nitric acid and perchloric acid. The volume was again made
up to 10 ml with 0.1N HNO3. The sample of water and sediment were ready for analyzed by AAS.