title: Kinetic speciation and bioavailability of copper and nickel in mangrove sediments.
abstract: An attempt was made to establish a mechanistic linkage between chemical speciation of copper and nickel, and their bioavailability in mangrove ecosystem. Kinetic speciation study was performed to determine the concentrations of labile metal-complexes and their dissociation rate constants in mangrove sediments. Concentrations of copper and nickel in the mangrove roots were used as indicators of their bioavailability. It was found that the bioaccumulation of both the metals gradually increased with the increasing concentrations of the labile metal complexes and their dissociation rate constants in the mangrove sediments. This study shows that concentration of labile metal (copper and nickel) complexes and their dissociation rate constants in mangrove sediment can be a good indicator of their bioavailability.
authors.affiliation: National Institute of Oceanography (CSIR), Dona Paula, Goa 403004, India. Electronic address: 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: Sucharita
authors.initials: S
authors.lastname: Chakraborty
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: Kartheek
authors.initials: K
authors.lastname: Chennuri
mesh_terms: D001682:Biological Availability; D003300:Copper / Q000032:analysis / Q000493:pharmacokinetics*; D017753:Ecosystem; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007194:India; D007700:Kinetics; D009532:Nickel / Q000032:analysis / Q000493:pharmacokinetics*; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism; D013054:Spectrophotometry, Atomic; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000493:pharmacokinetics
chemical_list: D014874:Water Pollutants, Chemical; D003300:Copper; D009532:Nickel
keywords: Copper and nickel speciation; Kinetic speciation; Mangrove sediment; Single extraction method; Speciation and bioavailability