Environmental geochemistry of core sediments from Serthalaikkadu creek, East coast of India

Abstract

The Serthalaikkadu creek in Muthupet mangroves region is the only E-W trending coastal strip in the SE coast of India and it also acts as a barrier to natural disasters. Natural, anthropogenic signals and accumulation of elements were studied by collecting sediments from two cores. Textural parameters were studied in detail and carbonates (CaCO 3 ), organic carbon (OC), major (Si, Al, Fe, Na, K, Ca, Mg, P) and trace elements (Mn, Cr, Cu, Ni, Co, Pb, Zn) were determined. Textural parameters, CaCO 3 , OC and Al-normalized pattern of elements indicate depositional events in core samples that can be directly related to natural events during the last decade. The calculated enrichment, anthropogenic factors and comparison of data indicate that the observed trace metals (especially Pb, Co) are enriched mainly due to the anthropogenic activities in the land as well as in the coastal zone (Palk Strait).

Geochemistry of Core Sediments from Tropical Mangrove Region of Tamil Nadu: Implications on Trace Metals

“…The overall length of the core-1 (C1) was 150 cm and Core-2 (C2) was 180 cm and in both cores, sub-samples were made at 2 cm intervals. In this study, the geochemical data have not been corrected for compaction, as it is likely to be uniform down the length of the core [37,38]. Textural studies of sand, silt and clay were carried out following the procedure of Ingram [39].…”

Evaluación de la condición fisiológica de la almeja Polymesoda caroliniana (Bivalva: Corbiculidae) expuesta a cadmio

“…Este organismo pasa la mayor parte de su vida inmersa en el sedimento. Los sedimentos asociados a manglares pueden actuar como sumideros y a la vez como una fuente de metales tóxicos (Sundararajan y Natesan, 2010). Por lo que el estudio de los mecanismos de acumulación de los metales en los sedimentos cada día cobra más importancia (Botté et al, 2010).…”