title: Impact of total organic carbon (in sediments) and dissolved organic carbon (in overlying water column) on Hg sequestration by coastal sediments from the central east coast of India.
abstract: Total organic carbon (TOC) (in sediment) and dissolved organic matter (DOM) (in water column) play important roles in controlling the mercury sequestration process by the sediments from the central east coast of India. This toxic metal prefers to associate with finer size particles (silt and clay) of sediments. Increasing concentrations of DOM in overlying water column may increase complexation/reduction processes of Hg(2+) within the water column and decrease the process of Hg sequestration by sediments. However, high concentrations of DOM in water column may increase Hg sequestration process by sediments.
authors.affiliation: Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India. Electronic address: pchak@nio.org.
authors.forename: Parthasarathi
authors.initials: P
authors.lastname: Chakraborty
authors.affiliation: Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India; TERI University, 10, Institutional Area, Vasant Kunj, New Delhi, India.
authors.forename: Brijmohan
authors.initials: B
authors.lastname: Sharma
authors.affiliation: Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India.
authors.forename: P V Raghunath
authors.initials: PV
authors.lastname: Babu
authors.affiliation: Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India; Centre de Recherches Oceanologiques, BP V18 Abidjan, Cote d'Ivoire.
authors.forename: Koffi Marcellin
authors.initials: KM
authors.lastname: Yao
authors.affiliation: Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403004, India; Cochin University of Science and Technology, Cochin 682022, Kerala, India.
authors.forename: Saranya
authors.initials: S
authors.lastname: Jaychandran
mesh_terms: D002244:Carbon / Q000032:analysis; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis*; D007194:India; D008628:Mercury / Q000032:analysis*; D008767:Methylmercury Compounds / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006812:Humic Substances; D008767:Methylmercury Compounds; D014874:Water Pollutants, Chemical; D002244:Carbon; D008628:Mercury
keywords: Hg speciation; Hg-sediment interaction; Hg–TOC complexes; Humic acid–Hg complexes