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首页> 外文会议>Proceedings of the Twenty-eighth Arctic and Marine Oilspill Program(AMOP) Technical Seminar vol.1 >Validation of OMA Formation in Cold Brackish and Sea Waters
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Validation of OMA Formation in Cold Brackish and Sea Waters

机译：淡盐水和海水中OMA形成的验证

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A laboratory study was conducted to validate formation of oil-mineral aggregates (OMA) in cold brackish and sea waters. OMA were generated by shaking Heidrun and IF30 crude oils with bentonite and chalk mineral fines in salt water at salinities of 18 and 30 ppt, temperature of -0.5℃ and a pre-defined energy level. Shape, size and concentration of oil droplets forming OMA were measured by image analysis using epi-fluorescence microscopy. Results showed that OMA form readily in cold water. The highest OMA-stabilised oil percentage is obtained with the chalk sediment. For sediment concentration of 200 mg/l of chalk, about 90% of the reacting Heidrun oil is stabilised. However, this percentage drops to about 30% with IF30. Increasing the sediment concentration of chalk to 400 mg/l results in significant increases of OMA-stabilised oil percentage to about 100% for Heidrun and 80% for IF30. Bentonite is more efficient with Heidrun (light oil) than with IF30 (viscous oil). The maximum OMA-stabilised oil percentage obtained with chalk is about 80% for Heidrun and 32% for IF30 at sediment concentrations of 300 mg/l. No substantial increase in OMA formation was observed when bentonite concentration is increased to 400 mg/l. Results of this study reveals that an OMA-based cleaning method could be developed to disperse spilled oil in cold brackish water typical of the St.-Lawrence estuary in Quebec. Chalk forms OMA better than bentonite. The in-situ sediment concentration that should be targeted to maximize oil dispersion is about 300 to 400 mg/l.
机译：进行了一项实验室研究，以验证在冷咸淡水和海水中形成的油矿骨料（OMA）。 OMA是通过在盐水中，盐度分别为18和30 ppt，温度为-0.5℃以及预先定义的能级下，将海德润和IF30原油与膨润土和白垩矿物细粉一起摇晃而生成的。使用落射荧光显微镜通过图像分析来测量形成OMA的油滴的形状，大小和浓度。结果表明OMA易于在冷水中形成。用白垩沉积物可获得最高的OMA稳定油百分比。对于200 mg / l的白垩沉积物浓度，约90％的Heidrun反应油是稳定的。但是，使用IF30时，该百分比下降到大约30％。将白垩的沉积物浓度提高到400 mg / l会导致OMA稳定油百分比显着增加，对于Heidrun，对于IF30，约为80％。使用Heidrun（轻油）膨润土比使用IF30（粘稠油）更有效。在沉积物浓度为300 mg / l的情况下，用粉笔获得的最大OMA稳定化油百分比对于Heidrun为约80％，对于IF30为32％。当膨润土的浓度增加到400 mg / l时，没有观察到OMA形成的实质性增加。这项研究的结果表明，可以开发出一种基于OMA的清洁方法，以将溢出的油分散到魁北克的圣劳伦斯河口典型的冷咸水中。粉笔比膨润土更好地形成OMA。为使油的分散最大化而应采用的原地沉积物浓度约为300至400 mg / l。

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