Document Detail

Statistical comparison and correlation of zinc and lead in estuarine sediments along the western coast of Mauritius.
MedLine Citation:
PMID:  15337349     Owner:  NLM     Status:  MEDLINE    
Cr, Zn and Pb were quantified using atomic absorption spectrometry (AAS) from urban and rural estuarine sediments collected along the western coast of Mauritius during the period July 2002-January 2003. The mean concentration of Cr (225.4 mg kg(-1)), Zn (107.0 mg kg(-1)) and Pb (27.0 mg kg(-1)) in sediments along the six estuaries can be considered below those from contaminated estuarine sediments. Zn and Pb were significantly higher in urban sediments downstream St. Louis River compared to a rural estuary at Tamarin at 5% significance level. Zn was also significantly lower in Tamarin compared to Petite Riviere Noire estuary. Cr was however not significantly different in sediments from the six estuaries and could be considered of basaltic origin and were correlated to neither lead nor zinc. The concentration of Zn and Pb were greatest in the more urbanised upper and lower reaches of the St. Louis estuary during the period of study and were also significantly positively correlated in the estuarine sediments indicating that the cycling of Pb and Zn were linked indicating a common source for Pb and Zn. The potential sources of Pb and Zn in the urban estuarine sediments were considered to arise from road runoff causing significant quantities to be trapped. At present, compared to contaminant levels found in the UK and elsewhere, Mauritius still looks relatively uncontaminated but there is growing concern about heavy metal contamination in urban estuaries. There is therefore a need for long-term studies in estuarine management to involve integrated strategies in which water-sediment interactions in estuaries need to be considered and international standards for sediment quality developed. Such studies undertaken in the future would further the understanding of the biogeochemical processes of estuarine systems in Mauritius which could then be used in environmental development schemes and effective coastal zone management.
Roshan T Ramessur
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Environment international     Volume:  30     ISSN:  0160-4120     ISO Abbreviation:  Environ Int     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-08-31     Completed Date:  2004-12-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7807270     Medline TA:  Environ Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1039-44     Citation Subset:  IM    
Department of Chemistry, Faculty of Science, University of Mauritius, Reduit, Mauritius.
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MeSH Terms
Environmental Monitoring
Geologic Sediments / chemistry
Lead / analysis*
Vehicle Emissions
Water Supply
Zinc / analysis*
Reg. No./Substance:
0/Vehicle Emissions; 7439-92-1/Lead; 7440-66-6/Zinc

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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