Study of trace metal contamination and ecological risk assessment in the sediments of a tropical river estuary, Southwestern India

D'souza, Nishitha and Amrish, Vadakkeveedu Narayan and Arun, kumar and Warrier, Anish Kumar and Udayashankar, H N and Balakrishna, K (2022) Study of trace metal contamination and ecological risk assessment in the sediments of a tropical river estuary, Southwestern India. Environmental Monitoring and Assessment. ISSN 0167-6369

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Abstract

The present study aims to assess the extent of trace metal pollution in the sediments of Sita�Swarna estuary, west coast of India, and investigate their possible ecological risk on the aquatic environ�ment. The sediment cores were analyzed for sand, silt, clay, organic carbon, and trace metals (Al, Fe, Mn, As, Cd, Co, Zn, Pb, Ni, Cr, and Cu) at 2-cm intervals. The study revealed that sediments have deposited in relatively violent to very violent hydrodynamic energy conditions. Factor analysis indicated that the metal distribution is mainly controlled by Fe–Mn oxyhy�droxides and organic carbon. Further, the geochemical approach, pollution indices, and statistical evaluation revealed moderate pollution in the catchment. From an ecotoxicological perspective, the estimated risk index (RI) value was found to less than 150, indicating low risk for aquatic life. Thus, this baseline study would help to adopt strategies in pollution control and protect the fragile marine environment.

Item Type: Article
Uncontrolled Keywords: Estuarine sediments · Metals · Particle size distribution · Pollution · Risk index · Southwest India
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 03 Mar 2022 06:17
Last Modified: 03 Mar 2022 06:17
URI: http://eprints.manipal.edu/id/eprint/158337

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