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首页> 外文期刊>Russian journal of marine biology >The Role of Microorganisms in Transformation of Selenium in Marine Waters
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The Role of Microorganisms in Transformation of Selenium in Marine Waters

机译：微生物在海水中硒转化中的作用

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摘要

The activity of microorganisms is a decisive factor in the transformation of the essential and, at the same time, toxic selenium (Se) in marine waters. This review provides an analysis of the literature data on the microbiological regulation of the state of Se in marine waters: the role of microorganisms in eliminating toxic Se from marine waters through precipitation of reduced Se forms and in the reverse process, transformation of Se into a form available to be taken up by organisms and involvement of this element in the biogeochemical cycle. The processes of transformation of the oxidized and reduced Se forms with the participation of microorganisms in marine waters are considered. It has been shown that in anaerobic conditions bacteria use the oxidized Se forms as electron acceptors (reduction). Bioavailable selenite and selenate ions are formed in the case of aerobic oxidation. Biotransformation of dissolved Se is a key mechanism for the formation of methylated gaseous Se forms in marine waters as one of the ways to remove this element from the aquatic environment.
机译：微生物的活性是海水中必需硒（同时具有毒性）转化过程中的决定性因素。这篇综述提供了有关海水中硒状态的微生物调控的文献资料的分析：微生物在通过减少还原形式的硒的沉积而从海水中消除有毒硒中的作用，以及在相反的过程中，将硒转化为硒。可被有机体吸收的形式，并且该元素参与生物地球化学循环。考虑了海水中微生物参与的氧化和还原硒形式的转化过程。已经表明，在厌氧条件下细菌将氧化的硒形式用作电子受体（还原）。在有氧氧化的情况下会形成可生物利用的亚硒酸盐和硒酸根离子。溶解硒的生物转化是在海水中形成甲基化气态硒形式的关键机制，这是从水生环境中去除该元素的一种方法。

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