title: Distribution and ecotoxicological concerns of persistent organic pollutants in sediment from creek ecosystem.
abstract: In order to study the distribution and ecotoxicological concerns of persistent organic pollutants, grab sediment samples were collected from different locations across Thane creek, India. Analyses of samples were carried out using gas chromatography (GC)-electron capture detector and GC-mass spectrometry techniques. In organochlorine pesticides (OCPs), DDT (1,1,1,-trichloro-2,2-bis(p-chlorophenyl) ethane), DDE (1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene), DDD (1-chloro-4-(2,2-dichloro-1-(4-chlorophenyl)ethyl) benzene) and α, β, and γ conformer of hexachlorocyclohexane (HCH), and 9 polychlorinated biphenyls (PCBs) congeners were analyzed in surface sediment samples. Concentrations of these pollutants in grab sediment samples may indicate their current use and impact on marine ecosystem. Average concentrations of total DDT (including DDD and DDE), HCH, and Σ9PCBs were found to be 4.9, 12.5, and 2.9 µg kg(-1)(dry weight) respectively. High concentrations of OCPs and PCBs were found at discharge locations in creek compared to other locations. Location-wise distribution of OCPs and PCBs indicates their high concentrations at the waste water receiving point. Data were compared for ecotoxicological impacts based on the levels specified in the sediment quality standards of the US Environmental Protection Agency and the Canadian Council of Ministers of the Environment. γ-HCH was found to have maximum potential to induce ecotoxicological impacts.
authors.affiliation: a Environmental Monitoring and Assessment Section, Health, Safety and Environment Group, Bhabha Atomic Research Centre , Mumbai , India.
authors.forename: Mahesh
authors.initials: M
authors.lastname: Tiwari
authors.affiliation: a Environmental Monitoring and Assessment Section, Health, Safety and Environment Group, Bhabha Atomic Research Centre , Mumbai , India.
authors.forename: Sanjay Kumar
authors.initials: SK
authors.lastname: Sahu
authors.affiliation: a Environmental Monitoring and Assessment Section, Health, Safety and Environment Group, Bhabha Atomic Research Centre , Mumbai , India.
authors.forename: Gauri Girish
authors.initials: GG
authors.lastname: Pandit
mesh_terms: D017753:Ecosystem; D054750:Ecotoxicology; D004784:Environmental Monitoring / Q000379:methods; D005618:Fresh Water / Q000032:analysis / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000633:toxicity; D007194:India; D062206:Spatial Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
chemical_list: D006843:Hydrocarbons, Chlorinated; D014874:Water Pollutants, Chemical
keywords: PCBs; Persistent organic pollutants (POPs); environmental distribution; grab sediment; pesticide; sediment quality standards