title: Baseline of butyltin contamination in sediments of Sundarban mangrove wetland and adjacent coastal regions, India.
abstract: The study reports the first assessment for the quantification and speciation of butyltins (BTs) in surface marine sediment samples (0-5 cm) from intertidal mudflats of Sundarban mangrove wetland along with the Hugli (Ganges) river basin, eastern coastal part of India. Concentrations of tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT) were monitored at 16 stations and present at all study areas, in concentrations in sediments up to 84.2, 26.4 and 48.0 ng g(-1) of TBT, DBT and MBT, respectively. Significant correlations were obtained between MBT and DBT (r = 0.62, p = 0.01) and DBT and TBT (r = 0.54, p = 0.03). Calculated BT degradation index (BDI) values indicated recent contamination of BTs at 8 stations, and suggested either no degradation of TBT or very recent degradation at a 4 further stations. Additionally, BDI values also indicated no recent inputs of BTs in 4 stations (only MBT present in one of these stations). High concentrations of BTs, particularly TBT, have the potential to induce ecotoxicological impacts based on levels specified in Australian Sediment Quality Guidelines (SQGs). This study indicated that the majority of the analyzed stations were in the highest range of priority, due to high TBT concentrations.
authors.affiliation: Institute for Infrastructure and Environment, School of Engineering, University of Edinburgh, William Rankine Building, Edinburgh, EH9 3JL, UK. B.Antizar-Ladislao@ed.ac.uk
authors.forename: Blanca
authors.initials: B
authors.lastname: Antizar-Ladislao
authors.forename: Santosh Kumar
authors.initials: SK
authors.lastname: Sarkar
authors.forename: Peter
authors.initials: P
authors.lastname: Anderson
authors.forename: Tanya
authors.initials: T
authors.lastname: Peshkur
authors.forename: Bhaskar Deb
authors.initials: BD
authors.lastname: Bhattacharya
authors.forename: Mousumi
authors.initials: M
authors.lastname: Chatterjee
authors.forename: Kamala Kanta
authors.initials: KK
authors.lastname: Satpathy
mesh_terms: D054750:Ecotoxicology / Q000592:standards; D019015:Geologic Sediments; D007194:India; D009947:Organotin Compounds / Q000032:analysis*; D045483:Rivers; D014220:Trialkyltin Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D009947:Organotin Compounds; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C516409:mono-n-butyltin; C056189:di-n-butyltin; C011559:tributyltin