Study On Adsorption Of Heavy Fuel Oil On Sediments

These decades, oil spill occurs often on the sea, the oil contaminant has heavily effect on the marine ecosystem. One of the most important final fate of the oil contamination is entering into the sediments by the adsorption and sedimentation, it exists the adsorption and desorption of oil on sediments in the same time, which is a homeostasis, the desorption of oil contamination brings the secondary pollution to the marine ecosystem, thus studying on the adsorption between the sediments and the oil is benefit for understanding of the equilibrium adsorption quantity, adsorption equilibrium time and the adsorption disciplinary, which could provide some information about the investigation and governing of the environment contamination.The paper accords to the current status of oil contamination, especially when it was 2006, the container ship is driving into the ship yard dock of Zhoushan city of Zhejiang province, which was collide into another ship, the fuel oil tank was despair, the heavy fuel oil spilled, according the above, we study on adsorption of heavy fuel oil on the sediments.The paper simulated the process of adsorption of heavy fuel oil on the Yellow River Estuary sediments and the Zhoushan maritime area sediments, we study on the time and the quality of adsorption equilibrium in the dynamic and static circumstance, then we measured the petroleum content with Ultraviolet Spectrophotometer. It comes to the following conclusions:When it is in the dynamic condition, the time of adsorption equilibrium on the Yellow River Estuary and the Zhoushan maritime area sediments is about 3h and 2h; And the quality of adsorption equilibrium on the Yellow River Estuary and the Zhoushan maritime area sediments is about 1072.9μg/g and 1224.7μg/g in the dynamic condition.When it is in the static condition, the time of adsorption equilibrium on the Yellow River Estuary and the Zhoushan maritime area sediments is about 36h and 24h; And the quality of adsorption equilibrium on the Yellow River Estuary and the Zhoushan maritime area sediments is about 444.99μg/g and 919.26μg/g; The adsorption quality of heavy fuel oil on the the Yellow River Estuary and the Zhoushan maritime area sediments decreases with the increasing temperature, increases with the increasing salty, and decreases first, then increases with the increasing pH. decreases with the increasing particle size.When it is in the static condition, the adsorption of heavy fuel oil on the Yellow River Estuary is fit for the Langmuir adsorption isotherms, and the adsorption of heavy fuel oil on the Zhoushan maritime area sediments is fit for the Freundlich adsorption isotherms.