• S Krishna Kumar

      Articles written in Journal of Earth System Science

    • Distribution of arsenic and mercury in subtropical coastal beachrock, Gulf of Mannar, India

      J Dajkumar Sahayam N Chandrasekar S Krishna Kumar G Victor Rajamanickam

      More Details Abstract Fulltext PDF

      An assessment of coastal pollution was made on the basis of trace element concentrations (arsenic –As, mercury – Hg) in the Gulf of Mannar. The beachrock samples were collected along the coastal tracts between Rameswaram and Kanyakumari. The samples were dried and digested to determine the As and Hg using atomic absorption spectrophotometer (AAS-air-acetylene and nitrous oxide method). The As and Hg accumulation status of the beachrock was assessed using geo-accumulation index values ($I_{geo}$). The accumulation of As and Hg in the beachrock ranges from 2.75 to 20.72 𝜇 g g−1 and from 0.06 to 0.31 𝜇 g g−1, respectively. The As and Hg concentrations in the beachrocks are compared with crustal average values and average of other region sediments. The possible source of the contamination is from atmospheric deposition and anthropogenic activities.

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