Sujatha, C H; Manju, Nair P(Academic Journals, September , 2013)
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Abstract:
This study gave the first report on the biennial metal divergence in the sediments of Cochin
Estuarine system (CES). Surface sediments from 6 prominent regions of CES were sampled
in 2009 and 2011 for the geochemical and environmental assessment of trace metals (Cd,
Co, Cr, Cu, Pb Fe, Mg, Mn, Ni and Zn).Besides texture, total organic carbon (TOC) and
CHNS were also done. The contamination and risk assessment were performed by
determining geochemical indices. Comparison with sediment quality guidelines were done
to assess the probability for ecotoxicological threat to the estuary. Results showed that the
measured heavy metals had varied spatial distribution patterns, indicating that they had
complex origins and controlling factors
Description:
International Journal of Recent Scientific Research
Vol. 4, Issue, 9, pp.1365- 1369, September, 2013
Sujatha, C H; Manju, Nair P; Akhil, P S(Indian Academy of Sciences, December , 2013)
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Abstract:
Geochemical composition is a set of data for predicting the climatic condition existing in an ecosystem.
Both the surficial and core sediment geochemistry are helpful in monitoring, assessing and evaluating the
marine environment. The aim of the research work is to assess the relationship between the biogeochemical
constituents in the Cochin Estuarine System (CES), their modifications after a long period of anoxia
and also to identify the various processes which control the sediment composition in this region, through
a multivariate statistical approach. Therefore the study of present core sediment geochemistry has a
critical role in unraveling the benchmark of their characterization. Sediment cores from four prominent
zones of CES were examined for various biogeochemical aspects. The results have served as rejuvenating
records for the prediction of core sediment status prevailing in the CES
Description:
J. Earth Syst. Sci. 122, No. 6, December 2013, pp. 1557–1570
This paper presents the first detailed investigation on the residual levels of organochlorine insecticide
(OCI) concentrations in the Cochin estuarine sediment. It aims in elucidate their distribution and ecological
impact on the aquatic system. Concentrations of persistent organochlorine compound (OC) were
determined for 17 surface sediment samples which were collected from specific sites of Cochin Estuarine
System (CES) over a period of November 2009 and November 2011. The contaminant levels in the CES
were compared with other worldwide ecosystems. The sites bearing high concentration of organochlorine
compounds are well associated with the complexities and low energy environment. Evaluation of
ecotoxicological factors suggests that adverse biological effects are expected in certain areas of CES