Sedimentology, geochemistry, pollution status and ecological risk assessment of some heavy metals in surficial sediments of an Egyptian lagoon connecting to the Mediterranean Sea.
Identifieur interne : 000129 ( Main/Exploration ); précédent : 000128; suivant : 000130Sedimentology, geochemistry, pollution status and ecological risk assessment of some heavy metals in surficial sediments of an Egyptian lagoon connecting to the Mediterranean Sea.
Auteurs : Ghada F. El-Said [Égypte] ; Suzanne E O. Draz ; Manal M. El-Sadaawy ; Abeer A. MoneerSource :
- Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering [ 1532-4117 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- Wicri :
- geographic : Égypte.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Metals, Heavy, Water Pollutants, Chemical.
- chemical , toxicity : Metals, Heavy, Water Pollutants, Chemical.
- geographic : Egypt, Mediterranean Sea.
- analysis : Geologic Sediments.
- chemistry : Geologic Sediments, Lakes.
- Environmental Monitoring, Risk Assessment.
Abstract
Spatial distribution of heavy metals (Co, Cu, Ni, Cr, Mn, Zn and Fe) was studied on Lake Edku's surface sediments in relation to sedimentology and geochemistry characteristics and their contamination status on the ecological system. Lake Edku's sediments were dominated by sandy silt and silty sand textures and were enriched with carbonate content (9.83-58.46%). Iron and manganese were the most abundant heavy metals with ranges of 1.69 to 8.06 mg g(-1) and 0.88 to 3.27 mg g(-1), respectively. Cobalt and nickel showed a harmonic distribution along the studied sediments. The results were interpreted by the statistical means. The heavy metal pollution status and their ecological risk in Lake Edku was evaluated using the sediment quality guidelines and the contamination assessment methods (geoaccumulation, pollution load and potential ecological risk indices, enrichment factor, contamination degree as well as effect range median (ERM) and probable effect level (PEL) quotients). Amongst the determined heavy metals, zinc had the most ecological risk. Overall, the heavy metals in surface sediments showed ecological effect range from moderate to considerable risk, specially, in the stations in front of the seawater and in drain sources that had the highest toxic priority.
DOI: 10.1080/10934529.2014.894853
PubMed: 24798902
Affiliations:
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Lake Edku's sediments were dominated by sandy silt and silty sand textures and were enriched with carbonate content (9.83-58.46%). Iron and manganese were the most abundant heavy metals with ranges of 1.69 to 8.06 mg g(-1) and 0.88 to 3.27 mg g(-1), respectively. Cobalt and nickel showed a harmonic distribution along the studied sediments. The results were interpreted by the statistical means. The heavy metal pollution status and their ecological risk in Lake Edku was evaluated using the sediment quality guidelines and the contamination assessment methods (geoaccumulation, pollution load and potential ecological risk indices, enrichment factor, contamination degree as well as effect range median (ERM) and probable effect level (PEL) quotients). Amongst the determined heavy metals, zinc had the most ecological risk. 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