Short-term weathered spilled oil tracing method based on confocal micro Raman spectrum

A Raman spectrometer and oil spill technology, applied in Raman scattering, material excitation analysis, etc., can solve the problem of reducing the rate of change of oil spill components, and achieve the effect of avoiding errors and uncertainties

Inactive Publication Date: 2013-11-13
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0007] Although in the short-term weathering process, some components with lower boiling points in the spilled oil may volatilize to a certain extent, but the high-viscosity asphaltenes and colloids in the spilled oil will significantly reduce the rate of change of the components of the spilled oil

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  • Short-term weathered spilled oil tracing method based on confocal micro Raman spectrum
  • Short-term weathered spilled oil tracing method based on confocal micro Raman spectrum
  • Short-term weathered spilled oil tracing method based on confocal micro Raman spectrum

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Embodiment 1

[0047] The crude oil samples used in this example were provided by the State Key Laboratory of Heavy Oil, China University of Petroleum (Beijing), and were respectively from Brazil, Liaohe, Venezuela and Fengcheng, Xinjiang.

[0048] 1. Simulate oil spill: Mix the crude oil sample with seawater and place it outside to weather to simulate oil spill. The specific operation is as follows:

[0049] Add 100mL of seawater to each of four 200mL beakers. The seawater is the surface seawater in the sea area near Heishijiao, Dalian. Add 2mL of crude oil from different origins above to the beakers, mix with seawater, and weather outdoors for 8 days at an outdoor temperature of 2-2. 12°C, and samples were taken on the 2nd, 4th, and 8th day;

[0050] 2. Collect sample Raman fingerprint data: first use high-purity quartz glass slide and cover glass to prepare crude oil samples, and set the abscissa measured by Horiba JY XploRA micro confocal Raman spectrometer as wave number / cm -1 mode, us...

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Abstract

The invention discloses a short-term weathered spilled oil tracing method based on a confocal micro Raman spectrum. The method comprises the following steps: measuring Raman fingerprint data of crude oil and spilled oil samples adopting a 532nm, 514nm or 488nm of laser device as an excitation light source; converting the obtained fingerprint data into multi-dimensional space vectors; and carrying out cluster analysis by taking vector cosine and Pearson pertinence as criteria to obtain a trace analysis result of the spilled oil, so as to determine the origin information. By adopting the short-term weathered spilled oil tracing method, uncertain factors and errors caused by the traditional Raman data processing software by a polynomial fitting deduction baseline are avoided; the accuracy and the creditability of the trace result of the short-term weathered spilled oil can be obviously improved; an important basis is provided for responsibility identification and economic compensation of an oil spilling event; a theoretical foundation also can be provided for exploration of a mechanism of transportation and conversion of the spilled oil in the pollution treatment and environmental modification processes.

Description

technical field [0001] The invention relates to an oil spill traceability method, in particular to a short-term weathered oil spill traceability method based on microscopic confocal Raman spectroscopy, which belongs to the field of detection and control of marine environmental pollution. Background technique [0002] In oil development and ocean transportation, oil spill accidents occur frequently, causing extremely serious damage to the environment and ecosystem. Traceability analysis through oil fingerprints can not only provide an important basis for the determination of responsibility and economic compensation for oil spills, but also provide a theoretical basis for exploring the migration and transformation mechanism of oil spills in the process of pollution control and environmental restoration. [0003] Oil fingerprint studies have been reported by gas chromatography-mass spectrometry [1-3] , HPLC [4] , stable isotope mass spectrum [5] , NMR [6] ,Fluorescence Spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 于迎涛王金芝屈佩玲刘红娅
Owner DALIAN MARITIME UNIVERSITY
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