Browsing by Author "F. Merlin Franco"

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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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    Geochemical behaviour and risk assessment of trace elements in a tropical river, Northwest Borneo
    (Elsevier, 2020) K. Prabakaran; S. Eswaramoorthi; R. Nagarajan; A. Anandkumar; F. Merlin Franco
    This study focuses on the highly mobile fraction of trace elements in particulates (<11 μm) and dissolved form in the Lower Baram River. A factor model utilizing trace elements in the dissolved and mobile phase in the particulates (<11 μm) along with water column characteristics and the partition coefficient (Kd) of the trace elements indicated a more significant role for manganese oxyhydroxides in trace element transport.