Chemical Availability and Transformations of Trace Metals (Fe, Mn, Zn, Co and Ni) in Lake Maryut Sediments, Alexandria, Egypt
Titel:
Chemical Availability and Transformations of Trace Metals (Fe, Mn, Zn, Co and Ni) in Lake Maryut Sediments, Alexandria, Egypt
Auteur:
Okbah, Mohamed A. Tayel, Fathy T.
Verschenen in:
Chemistry & ecology
Paginering:
Jaargang 14 (1997) nr. 1 pagina's 55-67
Jaar:
1997-12-01
Inhoud:
Laboratory experiments were performed to predict the fate and transformation of trace metals (iron, manganese, zinc, cobalt, nickel) associated with polluted sediments. Three sediment samples from Lake Maryut were collected. After an incubation period of about 168 hr, the different chemical forms of the metals were determined under oxidizing and reducing condition. the results showed that a large quantity of manganese was converted from the oxide fraction to the more exchangeable and water-soluble fractions, while iron, zinc, cobalt and nickel associated with the Mn-oxide form were increased. the relative percentage of metals, including the water-soluble exchangeable and organic forms, constituted < 10% of the total amount for iron, < 16% for manganese, 25% for zinc, 63% for nickel and 35% for cobalt. Also, the results showed that the metals bound with organic materials followed the order: nickel > cobalt > zinc > iron > manganese.
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