Abstract
The method of obtaining magnetic petroleum sorbent for petroleum products spills cleanup from water surface, based on the mixture of waste kieselghur sludge from oil extraction industry and a ferromagnetic component - the finely-dispersed iron-ore concentrate (magnetite), has been suggested. It has been demonstrated that after the waste kieselghur sludge thermal modification in the temperature interval 430-500°С the burn-out of the organic matter is not complete – there remain the wax fractions of wax-like substances, contained in it. The obtained material becomes hydrophobic and oleophilic. The introduction of magnetite in amount of 10% provides the maximum oil-absorbing capacity of the petroleum sorbent – 3.05 g/g without reducing its hydrophobic properties. The value of the wetting angle amounts to 150°, and the water absorption is very low – no more than 2.1%. The optimal temperature of the magnetic petroleum sorbent production is 450°С. The obtained material in its petroleum-saturated state is highly buoyant within 24-120 hours, which provides enough time to clean up the water surface from petroleum products and to collect the sorbent.
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