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- W2980931639 abstract "The mechanism and influencing factors of sludge de-oiling process collected from the Tahe oil field, a thickened oil field in China, were investigated using biosurfactant. The oily sludge was collected from ground sludge near the oil-well blowout and pipeline perforation, and the storage time about 3∼5 years, resulting in high content of heavy components in the sludge. The viscosity of the recovered oil at 50℃ was approximately 2.5 × 10∧4 mPa·s. The contents of saturated fraction, aromatic fraction, colloid, and asphaltene of the oil in the oily sludge were 24.37%, 29.35%, 15.55% and 30.37%, respectively. When the solid–liquid ratio was 1:2.5, the stirring strength was 350 r/min, the cleaning agent concentration was 15 g/L, the cleaning time was 100 min, and the temperature was 65 °C, the oil content of the cleaned sludge was less than 0.5 wt%. The surface of the solid particles of sludge was rough and exhibited a porous structure, which were beneficial to the adsorption of crude oil and other pollutants. Interface analysis showed that the interfacial tension decreased from 25 mN/m to 5 mN/m, whereas the contact angle increased from 7.88° to 36.02°. Biosurfatcant could markedly lower the interfacial tension and change the wettability of the surface of solid particles. As a result, the oil–water interface film on the surface was destroyed, the contact angle between the crude oil and the solid surface increased, and the crude oil was peeled off." @default.
- W2980931639 created "2019-10-25" @default.
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- W2980931639 date "2020-01-01" @default.
- W2980931639 modified "2023-10-15" @default.
- W2980931639 title "Treatment mechanism of sludge containing highly viscous heavy oil using biosurfactant" @default.
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- W2980931639 doi "https://doi.org/10.1016/j.colsurfa.2019.124117" @default.
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