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Document Type |
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Article In Journal |
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Document Title |
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Distribution and Behaviour of Some Heavy Metals in the Surface Sediments of Al-Arbaeen Lagoon, Jeddah, Red Sea Coast توزيع وسلوك بعض العناصر الثقيلة في الرواسب السطحية لبحيرة الأربعين - جدة - ساحل البحر الأحمر |
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Subject |
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Earth Sciences |
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Document Language |
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English |
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Abstract |
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Analysis of surface sediments from Al-Arbaeen Lagoon shows
that the sediments consist mainly of soft mud that is dark in colour, rich in organic
matter, and associated with high concentrations of hydrogen sulphide.
These characteristics indicate that the lagoon basin is a low energy, anoxic,
sulphidic sedimentary environment.
The concentrations of Fe, Mn, Zn, Pb, Ni, Cr, Co, Cu and organic carbon are
higher in the lagoon sediments than the background levels of these elements
measured in remote unpolluted marine sediments This is due to the large input
of anthropogenic waste into the lagoon.
Data indicate that the behaviour of Fe, Mn, Co and Cr are strongly influenced
by redox reactions and seem to exist as sulphide minerals such as pyrite
or are associated with iron sulphide minerals. Zn and Cu show a preferential
association with the organic carbon. Ni and Pb do not show any
definite association with different geochemical phases of the sediments.
Diagenetic remobilization of some metals and precipitation with iron sulphide
minerals and organic carbon appear to be the possible mechanisms explaining
the heterogeneous distribution of these metals produced by redox reactions
in the lagoon’s surface sediments. |
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ISSN |
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1012-8832 |
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Journal Name |
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Earth Sciences Journal |
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Volume |
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10 |
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Issue Number |
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1 |
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Publishing Year |
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1419 AH
1998 AD |
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Number Of Pages |
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12 |
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Article Type |
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Article |
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Added Date |
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Sunday, October 11, 2009 |
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Researchers
| علي سعيد باسحم | A.S. BASAHAM | Researcher | | |
|