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Browsing Land by Author "A. Anandkumar"

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    Environmental significance and geochemical speciation of trace elements in Lower Baram River sediments
    (Elsevier, 2019) K. Prabakaran; R. Nagarajan; S. Eswaramoorthi; A. Anandkumar; F. Merlin Franco
    The geochemistry and distribution of major, trace and rare earth elements (REE's) was studied in the surface sediments of the Lower Baram River during two seasons: the Monsoon (MON) and Post-monsoon (POM). The major geochemical processes controlling the distribution and mobility of major, trace and REE's in the Lower Baram River surface sediments was revealed through factor analysis. The risk assessment of major and trace element levels was studied at three specific levels; i.e. the enrichment level [Contamination Factor (Cf), with the geo-accumulation index (Igeo)], the availability level [metals bound to different fractions, risk assessment code (RAC)], and the biological toxicity level [effect range low (ERL) and effect range medium (ERM)].
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    Seasonal variation and mobility of trace metals in the beach sediments of NW Borneo
    (Elsevier, 2022) A. Anandkumar; R. Nagarajan; Eswaramoorthi Sellappa Gounder; K. Prabakaran
    Miri city has a dynamic coastal environment, mainly influenced by intensive sedimentation from the Baram River and excessive trace metal loading by the Miri River, which are significant environmental concerns. As the mobility, bioavailability, and toxicity of the trace metals in the sediments are largely controlled by their particulate speciation, the modified BCR sequential extraction protocol was applied to determine the particulate speciation of trace metals in the coastal sediments of Miri, to unravel the seasonal geochemical processes responsible for known observations, and to identify possible sources of these trace metals.