• R.LAKSHMANAN

The most important environmental contaminants due to their toxicity, persistence and tendency to accumulate in aquatic organisms. This study was to determine the concentration of heavy metals in the sediments of Ennore, Parangipettai, pichavaram and Muthupettai mangroves, east coast of Tamil Nadu, by using Absorption Spectrophotometer (AAS- Perkin Elmer modal A 400). The degree of concentration in water and sediment were as Follows (Fe>Mg>Mn>Zn>Cr>Cd). The average heavy metal concentrations were below the world crustal average. The present levels are much lower and well within the threshold levels set and ISI units for marine waters. The results of two-way ANOVA showed significant variations between the seasons (p < 0.01) and stations (p < 0.01).

Iron, Zinc, Magnesium, Manganese, Cadmium & Chromium

"Concentration of heavy metals in Four Mangrove Sediments (Muthupettai, Pichavaram, Parangipettai And Ennore), Southeast Coast Of India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 1, page no.733-742, January-2017, Available :http://www.jetir.org/papers/JETIR1701156.pdf

"Concentration of heavy metals in Four Mangrove Sediments (Muthupettai, Pichavaram, Parangipettai And Ennore), Southeast Coast Of India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 1, page no. pp733-742, January-2017, Available at : http://www.jetir.org/papers/JETIR1701156.pdf