Abstract

Oil spills are random phenomenon and occur in many sizes and forms. The largest 50 spill events are listed, noting that the Gulf War spill in 1991 remains the world’s largest oil spill. Organized and rapid response to oil spills is very important to minimize environmental damage. Contingency plans detail the planned response. Five types of oils and fuels are frequently spilled and include gasoline, diesel fuel, light and heavy crude oils, and bunker fuels. Two important properties of these oils include the viscosity and density. The viscosity of spilled products can vary over orders-of-magnitude. The behavior of oils when spilled dictates the environmental impact these will have. The most important oil behaviors are evaporation and water uptake. Evaporation is an exponential factor with time and thus most of the evaporation (about 80 %) occurs in the first 2 days. Water uptake takes place in any of the five ways: Soluble water Entrained water Meso-stable emulsions Stable emulsions Those that do not form any of the other types or unstable.

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