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An improved technique for determination of oil content in water-bearing medium
ZHENG Xi-lai1, LIANG Chun2,ZHANG Jun-jie1,YUE Feng3,LIU Jian-hua2
(1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;2. Qingdao Urban Planning & Design Research Institutet Qingdao 266071, China;3. Jinan Municipal Engineering Design and Research Institute f Jinan 250101,China)
Abstract:
A new computational formula was deduced and created to calculate oil content in water-bearing medium through introducing oil dying loss ratio. The results show that this improved fonnula can measure dry medium solid mass and oil content in petroleum-contaminated water-bearing medium accurately. Hie value of oil drying loss ratio varies depending on types of oil and water-bearing media. The oil drying loss ratio in coarse sand contaminated by diesel oil is 0.66. The relative error of the new method is about 0.4%,which is far below the relative error of existing methods. Moreover, the measurement accuracy of the new method is not influenced by oil volatility and oil content.
Key words:  water-bearing medium  oil content  oil drying loss rate  meaurement technique