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ESTIMATION OF ELEMENTS IN SEAWEEDS OF KARACHI COAST
Abstract
Seaweeds a one of the econo-medicinal important living marine resources that belong to the primitive, giöup of non-flowering plants, which grow submerged in intertidal. shallow. neritic waters upto 200 m depth in the sea. These marine benthic algae grow abundantly along the Karachi coast and show a wide range of structural organization. function and elemental distribution. Many species of green, brown and red seaweeds collected from Manora, Bulej! and Paradise Point were analyzed for their elemental composition with the help of Perkin Elmer 3100 Atomic Absorption Spectrometer. Several significant elements e.g. Ca, Cd. Co. Cr. Cu. Fe, K, Mg. Na. Pb and 2n were detected quantitatively. The Ca, Fe, K, Mg and Na were found in large amounts (223.79-13129.56 ppm), Cr, Cu, Pb and Zn were present in small quantities (1.27-10.49 ppm), while Cd and Co were detected in extremely small amounts (0.39-1.10 ppm). The average quantity of Na was found to be the highest among these algae (13129.56 ppm), followed by K (11655.71 ppm) and Ca (4242. 17 ppm). The average amounts of Cr (1.27 ppm) and Co (1.10 pm) were quite low: Cd was detected in the lowest quantity (0.39 ppm)
