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Author Abdel Moati, M. A. R.en_US
Author El Sammak, A.A.en_US
Available date 2009-12-29T08:57:11Zen_US
Publication Date 2004en_US
Publication Name Water, Air, and Soil Pollution
Citation Abdel-Moati, M. A. R., & El-Sammak, A. A. (1997). MAN-MADE IMPACT ON THE GEOCHEMISTRY OF THE NILE DELTA LAKES. A STUDY OF METALS CONCENTRATIONS IN SEDIMENTS. Water, Air, and Soil Pollution, 97(3-4), 413–429en_US
ISSN 0049-6979 (Print)en_US
ISSN 1573-2932 (Online)en_US
Abstract Forty two sediment samples were collected from four River Nile northern delta lakes (Mariut, Edku, Burullus and Manzalah) to asses the man-made impact on their environment during the last 20 years. Due to the continuous discharge of agricultural, industrial and sewage waste waters to these lakes, significant variations in the sediment's nature took place, with fine fractions dominating opposite to the outflowing area of the main drains. Organic carbon was elevated at the southern regions, reaching 10.5 ± 4.5% in lake Mariut. Meanwhile, carbonate increased reaching 90% for samples collected at the lake-sea connection areas. The 0.5 N HCl extractable metals indicated enriched levels of different metals at sites affected by sewage and industrial discharge. This fraction constituted 75 and 81% of the total metals in Lakes Mariut and Manzalah, respectively. Extractable Cd for Lakes Mariut and Manzalah constituted 51 and 53%, respectively, while Ph formed 59% of the total digestable metal in Lake Manzalah. Total metals concentrations especially Cd and Pb were elevated 8 to 70 times than those observed in the same lakes 25 years ago. The conversion of the untreated sewage discharge of Alexandria city to Lake Mariut and significant portion of Cairo sewage to Lake Manzalah during the past 10 years lead to the appearance of elevated levels of contaminants in both lakes. Agricultural discharge showed less impact on Lakes Edku and Burullus. Cluster analysis revealed associations between stations located under same types of stress while the correspondence factor analysis displayed that metals distribution pattern in the Nile delta lakes are governed by organic carbon as well as fine grained size fraction distribution.en_US
Language enen_US
Publisher Kluwer Academic Publishersen_US
Subject Cluseren_US
Subject Extractableen_US
Subject Factor analysisen_US
Subject Geochemistryen_US
Subject Metalsen_US
Subject Nile delta lakesen_US
Subject Totalen_US
Title Man-made impact on the geochemistry of the Nile delta lakes. A study of metals concentrations in sedimentsen_US
Type Articleen_US

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