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Detection and quantification of hydrocarbons in sediments

机译:沉积物中烃的检测和定量

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A new technology developed by the US Geological Survey now allows for fast, direct detection of hydrocarbon plumes both in rivers and drifting in the deep ocean. Recent experiments show that the method can also detect and quantify hydrocarbons buried in river sediments and estuaries. This approach uses a variant of induced polarization, a surface-sensitive physical property of certain polarizable materials immersed in an electrolyte that can accept and adsorb charge under an inducing voltage. Known polarizable materials include most sulfides, ilmenite (FeTiO3), metallic objects such as buried wrecks and pipelines, and now hydrocarbons. The hydrocarbon-in-water response to induced polarization is in fact nearly two orders of magnitude greater than the IP response of any of the hard minerals. The oil:water detection limit for hydrocarbons so far is down to 0.0002% in the laboratory.
机译:美国地质调查开发的一项新技术现在允许快速,直接地检测河流中的碳氢化合物羽毛,并在深海中漂移。最近的实验表明,该方法还可以检测和量化河流沉积物和河口埋藏的碳氢化合物。该方法使用诱导极化的变型,其浸入电解质中的某些可极化材料的表面敏感的物质,其在诱导电压下可以接受和吸附电荷。已知的可极化材料包括大多数硫化物,钛铁矿(FetiO3),如埋地残骸和管道,而现在的碳氢化合物。对诱导极化的烃响应实际上大于任何硬质矿物质的IP响应的几个数量级。迄今为止碳氢化合物的水检测限量降至实验室下降至0.0002%。

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