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    Distribution, sources and bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in oysters of Sal estuary Goa, India

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    Date
    2025
    Author
    Desai, A.
    Rathore, C.
    Nanajkar, M.
    Saha, M.
    Suneel, V.
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    Abstract
    Present study aimed to unfurl occurrence and accumulation of Polycyclic Aromatic Hydrocarbons (PAHs) in water and oysters of Sal estuary (Goa, India). The highest total PAHs concentration were observed at mid estuary (SSJ2) region for water (594.36�?g�L?1) and oyster (12,022.2�ng�g?1 dry weight) respectively. Which is under high anthropogenic pressure and tidal influence. The lowest concentration of total PAHs were displayed by upper estuarine (SSJ1) region (1.04�?g�L?1) for water and oyster (7019.1�ng�g?1 dry weight) as it is well surrounded by mangroves and is relatively pristine. Diagnostic ratios suggested mixed source as primary PAHs source in the study area. According to EFSA guidelines, Exposure Daily Intake (EDI) values and Target Hazard Quotient (THQ) were within permissible limits thus risk to develop chronic systematic effects is low. Although, present scenario demonstrates low health risk, long term exposure might be detrimental. High prevalence low molecular weight PAHs were noted in water column while, significant accumulation of high molecular weight PAHs in oysters were due to hydrophobic and lipophilic characteristic of PAHs, which increases with molecular weight.
    URI
    https://doi.org/10.1016/j.marpolbul.2025.118120
    http://drs.nio.res.in/drs/handle/2264/9448
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