title: Simulated oil release from oil-contaminated marine sediment in the Bohai Sea, China.
abstract: There is a high degree of heavy oil partitioning into marine sediments when an oil spill occurs. Contaminated sediment, as an endogenous pollution source, can re-pollute overlying water slowly. In this study, a static oil release process and its effects in marine sediment was investigated through a series of experiments with reproductive heavy oil-contaminated marine sediment. The oil release process was accurately simulated with a Lagergren first-order equation and reached equilibration after 48h. The fitted curve for equilibrium concentration (C0) and first-order rate constant (k1) for sediment pollution levels exhibited a first-order log relationship. The instantaneous release rate (dCtdt) was also calculated. The C0increased with increases in temperature and dissolved organic matter (DOM), and decreasing salinity. The k1increased with temperature, but was not affected by DOM and salinity. These results can be used to better understand the fate of heavy oil in contaminated sediments of the Bohai Sea.
authors.affiliation: College of Environment, Hohai University, Nanjing 210098, China; National Center of Oceanographic Standards and Metrology, Tianjin 300112, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Yuan
authors.affiliation: College of Environment, Hohai University, Nanjing 210098, China; Key Laboratory of Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210098, China. Electronic address: hanlongxi999@163.com.
authors.forename: Longxi
authors.initials: L
authors.lastname: Han
authors.affiliation: Marine Environmental monitoring and Forecasting Center, Tianjin 300450, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Bo
authors.affiliation: National Center of Oceanographic Standards and Metrology, Tianjin 300112, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Chen
authors.affiliation: Marine Environmental monitoring and Forecasting Center, Tianjin 300450, China.
authors.forename: Wenshen
authors.initials: W
authors.lastname: Gao
authors.affiliation: College of Environment, Hohai University, Nanjing 210098, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D004787:Environmental Pollution; D019015:Geologic Sediments / Q000737:chemistry*; D059392:Petroleum Pollution / Q000032:analysis*; D054712:Salinity; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical
keywords: Bohai Sea; Desorption; Marine sediment; Oil spill; Static release