Browsing by Author "Rohana Tair"

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    Distance impacts toxic metals pollution in mining affected river sediments
    (Elsevier, 2022) Chin Yik Lin; Bibi Noorarlijannah Mohammad Ali; Rohana Tair; Baba Musta; Mohd Harun Abdullah; Fera Cleophas; Feona Isidore; Mohd Shahrul Mohd Nadzir; Muhammad Hatta Roselee; Ismail Yusoff
    The study of metals mobility derived from mining activities in an ultramafic lithology is limited. This study investigates the effects of distance on potentially toxic metals such as Co, Cu, Fe, Mn, Ni, Pb, and Zn pollution, and the geochemical processes of fluvial system downstream of an ex-copper mine (Mamut River). The toxicity level of the river was evaluated using various sediment quality guidelines, ecotoxicological risks (ecological risk and risk index) and pollution indices. The geochemical behavior and stability of these toxic metals in the solid-phase samples were also examined.
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    Kepekatan logam berat dalam sedimen dan Meretrix sp. di pesisir Pantai Bongawan dan Lok Kawi, Sabah
    (UMS, 2010) Siti Aishah Mohd Ali; Kamsia Budin; Rohana Tair; Farrah Anis F. Adnan; Norfatihah Johani
    Kajian ini bertujuan menentukan kepekatan logam berat iaitu Pb, Cd, Zn, Fe dan Cu di dalam Meretrix sp. dan sedimen di kawasan pesisir pantai Bongawan dan Lok Kawi, Sabah. Logam berat dianalisis menggunakan ICP-OES setelah tisu Meretrix sp. dan sedimen dihadamkan menggunakan larutan aqua regia (HNO3: HCl).
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    Surface sediment analysis on heavy metals in coastal area of UMS- Tuaran, Sabah
    (UMS, 2014) Siti Aishah Mohd Ali; Tan Wei Hsiang; Rohana Tair; Apsa Abdul Naser; Fatin Sualin
    Heavy metal concentrations (Cd, Cr, Cu, Pb and Zn) were investigated in surface sediments from Universiti Malaysia Sabah (UMS) - Tuaran coastal area, Sabah. Samples were collected using Ponar grab sampler in ten different stations at the site area. The heavy metals were analyzed using Inductively Coupled Plasma – Optical Emission Spectrometer (ICP-OES) after the surface sediments were digested with aqua regia (HNO3: HCl) solution.