Browsing by Author "Prasanna Mohan Viswanathan"

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    Chemical characteristics of rainwater in the tropical rainforest region in northwestern Borneo
    (Springer, 2020) Ninu Krishnan Modon Valappil; Prasanna Mohan Viswanathan; Vijith Hamza
    A comprehensive study of the chemical composition of rainwater was carried out from October 2016 to September 2017 in the equatorial tropical rainforest region of northwestern Borneo. Monthly cumulative rainwater samples were collected from different locations in the Limbang River Basin (LRB) and were later categorized into seasonal samples representing northeast monsoon (NEM), southwest monsoon (SWM), and inter-monsoon (IM) periods.
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    Occurrence and distribution of geochemical elements in Miri estuary, NW Borneo: Evaluating for processes, sources and pollution status
    (Elsevier, 2023) Parvin Raj Suresh Raj; Prasanna Mohan Viswanathan
    In this study, estuarine water samples were collected at diverse hot spots in Miri River Estuary, East Malaysia to appraise the geochemical processes, which controls the river water quality. The collected water samples were analysed for various physicochemical parameters (insitu parameters, nutrients, major ions and trace metals), including stable isotopes (oxygen and hydrogen). Suspended solids are also extracted from the water samples and analysed for trace metals. Standard graphs, Piper plot, Gibbs diagram, water quality indices, geochemical modelling and statistical analysis were used for the data analysis.
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    Occurrence, distribution and sources of microplastics in beach sediments of Miri coast, NW Borneo
    (Elsevier, 2022) Aliza Marai anak Alexander Tampang; Prasanna Mohan Viswanathan
    The aim of this study is to identify the abundances, physical characteristics, polymer type and elemental composition of MPs in beach sediments of Miri coast, located in Sarawak State, East Malaysia. A total of 1553 particles from 24 sediment samples, collected from eight different beaches along Miri coastline were identified. MPs from the sediments were extracted using density separation method and analyzed through stereoscopic microscope, ATR-FTIR and SEM-EDX.