title: Mercury profiles in sediment from the marginal high of Arabian Sea: an indicator of increasing anthropogenic Hg input.
abstract: Total Hg distributions and its speciation were determined in two sediment cores collected from the western continental marginal high of India. Total Hg content in the sediment was found to gradually increase (by approximately two times) towards the surface in both the cores. It was found that Hg was preferentially bound to sulfide under anoxic condition. However, redox-mediated reactions in the upper part of the core influenced the total Hg content in the sediment cores. This study suggests that probable increase in authigenic and allogenic Hg deposition attributed to the increasing Hg concentration in the surface sediment in the study area.
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India. pchak@nio.org.
authors.forename: Parthasarathi
authors.initials: P
authors.lastname: Chakraborty
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Krushna
authors.initials: K
authors.lastname: Vudamala
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Kartheek
authors.initials: K
authors.lastname: Chennuri
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Kazip
authors.initials: K
authors.lastname: Armoury
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: P
authors.initials: P
authors.lastname: Linsy
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Darwin
authors.initials: D
authors.lastname: Ramteke
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Tyson
authors.initials: T
authors.lastname: Sebastian
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Saranya
authors.initials: S
authors.lastname: Jayachandran
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Chandan
authors.initials: C
authors.lastname: Naik
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: Richita
authors.initials: R
authors.lastname: Naik
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa, 403004, India.
authors.forename: B Nagender
authors.initials: BN
authors.lastname: Nath
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D007194:India; D008628:Mercury / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury
keywords: Anoxic sediment; Hg speciation; Mercury deposition; Mercury pollution; Redox cycling and mercury