title: Sources and Variability of Petroleum Hydrocarbon Residues in Sediments of Chilika Lagoon, East Coast of India.
abstract: The spatio-temporal distribution and the controlling factors of petroleum hydrocarbons (PHCs) in sediments of Chilika lagoon was investigated. Samples were collected during three seasons and quantified using UV-fluorescence spectroscopy. Concentrations of PHCs in surface sediments varies from 0.18 to 12.13 ppm (mean 3.71 ± 3.94 ppm). Compared to the lagoon, the monitoring stations adjacent to jetties with high boating activities tend to have higher PHC concentrations, suggesting that the contribution is likely to be from fossil fuel combustion and accidental seepage. The sediment organic matter (OM) of Chilika ranges from 0.26% to 6.23%. PHC maintains a positive correlation with OM (p < 0.05; f = 0.334), indicating the long term deposition of PHC as sediment OM. However, there is no significant relation between PHC and sediment texture, indicating its negligible control over PHC. The recorded PHC concentrations are below the threshold limit (70 ppm) as classified by United States (US) National Academy of Sciences (NAS) and also lower than those reported from similar ecosystems in India and overseas. Since the long term deposition and the bioaccumulation of PHC cannot be avoided, it is essential to monitor these parameters periodically.
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India.
authors.forename: Bita
authors.initials: B
authors.lastname: Mohanty
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India. prmuduli.wrtc@gmail.com.
authors.forename: Pradipta R
authors.initials: PR
authors.lastname: Muduli
authors.affiliation: Geography and Environment, University of Southampton, Highfield Campus, SO17 1BJ, Southampton, UK.
authors.forename: Gregory
authors.initials: G
authors.lastname: Cooper
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India.
authors.forename: Saroja K
authors.initials: SK
authors.lastname: Barik
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India.
authors.forename: Debasish
authors.initials: D
authors.lastname: Mahapatro
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India.
authors.forename: Alaya T
authors.initials: AT
authors.lastname: Behera
authors.affiliation: Wetland Research and Training Center, Chilika Development Authority, Barkul, Khurda, Odisha, 752030, India.
authors.forename: Ajit K
authors.initials: AK
authors.lastname: Pattnaik
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry*; D006838:Hydrocarbons / Q000032:analysis*; D007194:India; D010578:Petroleum / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006838:Hydrocarbons; D010578:Petroleum; D014874:Water Pollutants, Chemical
keywords: Anthropogenic activity; Petroleum hydrocarbon; Pollution; Surface sediment; UVF spectroscopy