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Study on the Oil Weathering and Identification on the Sea

Author: NiZhangLin
Tutor: MaQiMin
School: Ocean University of China
Course: Environmental Science
Keywords: GC GC-MS Oil fingerprint Weathering Heavy fuel oil
CLC: X55
Type: Master's thesis
Year: 2008
Downloads: 198
Quote: 3
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Abstract


With the rapid development of offshore oil exploration and offshore oil transport, oil spill incidents continue to occur, causing serious damage to marine life and marine natural resources. Understanding of the oil spill oil spill weathering and identify sources of pollution damage assessment and the responsibility of the dispute is extremely important. Whether it is from a different origin of the oil, or oil after refining process, they have the molecular characteristics significantly different from other oil products, these molecules have distinct characteristics known as the \form: the graphic display of the chemical characteristics of the oil are inherent. Instrumental analysis methods to obtain spectra of oil through pattern analysis calculated comparing other means to confirm the oil spill source, the oil spill fingerprint analysis is the favorable a means of implementing the Oil Pollution Act. Oil spill into the environment has experienced a series of weathering, including volatilization, dissolution, dispersion, emulsification, photochemical oxidation, microbial degradation and suspended particulate surface adsorption, will reduce hydrocarbon concentration of the sediment and water, and changing the oil spill chemical components. Thus increasing the difficulty of the residual oil on the identification of environmental impact. How to accurately identify the spilled oil sources become increasingly concerned about the hot issues of international and domestic experts. Occurred in Zhoushan of a heavy fuel oil spill, for example, through the the weathering simulation of heavy fuel oil in sea water, the establishment of the main ingredient in the oil as well as markers of weathering variation of the same time, the oil spill samples and collected at the scene of the suspicious oil source markers, right, and further to determine reliable in the oil spill markers, which provide a scientific basis for the identification of oil source. The results of this study show that: (1) to determine the chemical fingerprint of the oil spill after weathering, weathering simulation experiments, it is very necessary. Identification of a heavy fuel oil (2) According to the experimental conditions and oil properties, normal paraffin, pristane, phytanic and an A-phenanthrene, methyl benzothiophene Spectrum distribution and characteristics, can be used as mild weathered basis. (3) Depending on the nature of the experimental conditions and oil, terpenes and steranes and PAHs dimethoxy-phenanthrene, trimethoxy-phenanthrene and dimethyl benzothienyl, trimethyl benzothiophen Spectrum distribution and characteristics, basis of the identification of the heavy fuel oil can be used as a moderately weathered.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Marine pollution and its prevention
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