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Oil sands cokes affect microbial activities

机译：油砂焦炭影响微生物活动

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The upgrading of bitumen extracted from oil sands in Alberta, Canada is producing vast quantities of coke that must be stored in a manner that will not harm the environment. It has been assumed that these cokes are inert, and therefore should not affect any biological processes. Coke samples were incubated in two microbiological tests to determine if they are inert. One was a methanogenic bioassay, which showed that higher coke dosages led to lower methanogenic activity. In the second test, coke was incubated with heterotrophic, aerobic bacteria that are known to extract organic sulfur from coal yielding sulfate in the medium. Sulfate production was observed with one of the coke samples. Thus, the cokes are not inert.
机译：从加拿大艾伯塔省油砂中提取的沥青的提纯正在产生大量的焦炭，必须以不损害环境的方式进行储存。已经假定这些焦炭是惰性的，因此不应影响任何生物过程。将焦炭样品在两个微生物学测试中孵育，以确定它们是否呈惰性。一种是产甲烷生物测定法，它表明较高的焦炭用量导致较低的产甲烷活性。在第二项测试中，将焦炭与异养性好氧细菌孵育，已知该细菌可从煤中提取有机硫，从而在培养基中产生硫酸盐。用一种焦炭样品观察到硫酸盐的产生。因此，焦炭不是惰性的。

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