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  Global Journal of Environmental Science and Technology 2012, 2: 6
  Review Article
Methods for investigating trace element contamination in sediments: A review
  Sanja M. Sakan, Dragana S. Ðordevic  
IChTM, Department of Chemistry, Njegoševa 12, P. O. Box 815, Belgrade 11001, Serbia
  Among the various contaminants, potentially harmful trace elements are of particular concern due to their environmental persistence, biogeochemical recycling and ecological risks. Assessing trace element contamination of sediment is complicated since these elements are a ubiquitous, naturally occurring component of sediment, their concentrations in un-contaminated sediment can vary by orders of magnitude over relatively small spatial scales, and naturally occurring and anthropogenically introduced metals tend to accumulate in the same areas. Since the trace elements do not degrade naturally, accumulation of high concentration in sediments can be toxic to organisms living in surrounding environment. Proper assessment of the implications of sediment contamination with trace element normally requires more than one method to be used. This review describes methods for investigating trace element contamination in sediments using the: sequential extraction method, geochemical normalization and calculation enrichment factor.
  Trace element; Contamination; Sequential extraction; Geochemical normalization; Enrichment factor  

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