Magnetic Petroleum Sorbent Based on Waste Kieselghur Sludge from Oil Extraction Industry for Removing Petroleum Products from Water Surface

摘要

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°C 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°C. 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.