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首页> 外文会议>International oil spill conference >DISPERSION CHARACTERISTICS AND ASSOCIATED ENVIRONMENTAL IMPACTS IN THE UNLIKELY EVENT OF AN ORIMULSION? SPILL
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DISPERSION CHARACTERISTICS AND ASSOCIATED ENVIRONMENTAL IMPACTS IN THE UNLIKELY EVENT OF AN ORIMULSION? SPILL

机译：在一个令人源小小心的情况下，在不太可能发生的情况下的分散特征和相关的环境影响？洒

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Orimulsion? is a natural bitumen in water emulsion (70% bitumen, 30% water), that is stabilized by a surfactant (less than 0.2%). Orimulsion? is a relatively new fuel that is currently used in several electric-generating stations worldwide. Acceptance and use of the fuel are expected to increase in the very near future. An important consideration in using Orimulsion? as a fuel is the environmental risk associated with the unlikely event of a spill during transportation and transloading. This paper shows the dispersion characteristics and the possible environmental impacts of Orimulsion? when this is eventually spilled at sea based on theoretical considerations, laboratory studies, open-sea spill tests, and analytical and numerical modeling. The results indicate that in the unlikely event of an Orimulsion? spill, it will pose a very low risk of affectation to the biological species that may be in contact with the product. Because of the emulsified characteristics of the product, the dispersion of the bitumen droplets and the dilution of the surfactant will be relatively fast, reaching very low concentrations in the water column in a matter of hours. The SIMAP model was used to simulate an instantaneous spill of 22,000 barrels of Orimulsion? in a general place without currents and very low turbulence level to evaluate the development of the bitumen droplets cloud. The purpose is to follow the maximum bitumen concentration in order to be compared with the results of different toxicity tests reported in the literature, which represents the worst case scenario for organisms' impact. The results show that all the toxicity values remain relatively far above the maximum bitumen concentration curve. Therefore, if for the worst case scenario the possible environmental impacts of a 22,000-barrel Orimulsion? spills are very low, for normal sea conditions and a smaller spill size, it is expected that the maximum concentration curve will separate even more from the LC50 values, which imply a much lower impact on the marine organisms.
机译：奥里油？是在水乳液（70％的沥青，30％水），由表面活性剂（小于0.2％）稳定的天然沥青。奥里油？是当前在多个发电电力站使用全球一个相对较新的燃料。接受和使用的燃料，预计在不久的将来增加。使用奥里油的一个重要的考虑？作为燃料是溢出的运输和transloading期间不太可能事件相关联的环境风险。本文给出了色散特性和奥里油对环境可能造成的影响？当这是在海上基于理论上的考虑，实验室研究，开阔海域溢油测试，分析和数值模拟，最终洒。结果表明，在奥里油的万一？溢出，这将带来一个非常低的做作的风险，生物物种，可能是在与产品接触。由于该产品的乳化特性的，沥青液滴的分散液和表面活性剂的稀释会比较快，在几小时内达到非常低的浓度在水柱。该SIMAP模型用于模拟奥里油22000桶瞬间溢出？在没有电流的一般场所和极低湍流度来评价沥青水滴云的发展。的目的是为了按照最大沥青浓度以便与在文献中，这代表了生物体冲击最坏的情况下报告的不同毒性试验结果进行比较。结果表明，所有的毒性值保持相对远高于最大沥青浓度曲线。因此，如果最坏的情况下一个22000桶奥里油对环境可能造成的影响？泄漏是非常低的，在正常的海况和一个较小的溢出大小，预计的最大浓度曲线将从LC50值，这意味着对海洋生物低得多的冲击更加分离。

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