Risk Assessment and Spatio-temporal Distribution of Dissolved Trace Metals in Swarna, Sharavati and Kali Estuaries, South-West Coast of India

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2022 Sep 6

PMID 36066797

Authors

DSouza Nishitha

Athiyarath Krishnan Sudheer

Kumar Arun

Vadakkeveedu Narayan Amrish

Gaddam Mahesh

Harikripa Narayana Udayashankar

Keshava Balakrishna

Affiliations

Soon will be listed here.

Abstract

Trace metals act as a limiting nutrient and prerequisite for primary productivity in marine environments. The distribution of metals in dissolved phase along the salinity gradients of Swarna, Sharavati and Kali estuaries in southwestern India, during post and pre-monsoon seasons, were studied. We have investigated the behaviour of trace metals in the estuarine environment and their extent of impact on human health and ecosystem. The study revealed, non-conservative behaviour of dissolved Mn, Fe, Ni, Cd and Co in the estuaries. Whereas Cu behaved non-conservatively in post-monsoon and conservatively in pre-monsoon seasons. Risk assessment studies revealed that higher chronic daily intake (CDI) in humans, through dermal pathway, in Swarna and Sharavati estuaries during post-monsoon, whereas it was during pre-monsoon season in the Kali estuary. Hazard Index values for the studied metals in adults and children are below risk thresholds, though children are more prone to health risk through the dermal pathway.

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