الفهرس 
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Abstract
The purpose of this study is to determine the best conditions under which oil spills can be removed from the polluted sea water surface by applying the sinking agent method. Treatment b¥ sinking agent does ,not destroy the pollutant but transfers it from one evironment to another, so it can only be regarded as a satisfactory tr~atment if it is not a greater nuisance on the bottom than on the water surface.
The sinking agent is a powder or fine granular solid material of fairly high true density. It adheres to the oil to form a mass of greater density than that of water.
Sinking material should be oleophilic and hydrophobic, and
should continue to be oleophilic in the presence of a large excess of water.
The variables studied were:
Type of sinking agent (Sand, Kaolin and cement dust), type of crude oil (marine Balaim and Western desert), weight of sinking agent (10- 60 gm), water salinity (1.5% - 5.5%), free falling distance (10 - 40 em) and
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initial thickness of oil layer (6 - 18 em). In all cases the oil film had an area of68cmc.
It was found that the % removal of oil increases with the increase
of weight of sinker and water salinity .
On the other hand the % removal of oil decreases with the increase
of free falling distance of sinker and the initial thickness of oil layer.
Also it was found that the Western Desert crude oil and cement dust (as sinker) gave much higher % of removal as compared to marine Balaim using cement dust as a sinker.