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首页> 外文会议>Sixth International in Situ and On-Site Bioremediation Symposium, 6th, Jun 4-7, 2001, San Diego, California >MICROBIALLY MEDIATED REDUCTION AND IMMOBILIZATION OF URANIUM IN GROUNDWATER AT KOeNIGSTEIN
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MICROBIALLY MEDIATED REDUCTION AND IMMOBILIZATION OF URANIUM IN GROUNDWATER AT KOeNIGSTEIN

机译：微生物在微生物介导的还原和固定化中的作用

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摘要

Experiments have been conducted to determine whether in situ bioremediation could be applied at Koenigstein, Germany. There, an aquifer located on top of a former uranium mine might be contaminated after flooding of the mine. The flooding water will contain uranium and other contaminants. On site chemical conditions were closely simulated in the laboratory. Water was amended with lactate. The most likely chemical reactions leading to microbially mediated mineralization of uranium were identified and then experimentally verified. The results showed that indigenous microbes reduced U(VI) to U(IV) that precipitated as uraninite UO_2. A large excess of mackinawite [Fe_(l-x)S] was also precipitated by microbially mediated reactions and was shown to provide long-term protection against oxidative dissolution of uraninite.
机译：已经进行了实验以确定是否可以在德国的科尼希施泰因进行原位生物修复。那里的铀矿淹没后，位于前铀矿顶上的含水层可能被污染了。洪水将包含铀和其他污染物。在实验室中对现场化学条件进行了严格模拟。用乳酸修正水。确定并通过实验验证了导致微生物介导的铀矿化的最可能化学反应。结果表明，土著微生物将U（VI）还原为U（IV），后者以尿素UU_2的形式沉淀。微生物介导的反应也会沉淀出大量过量的麦基钠长石[Fe_（1-x）S]，并显示出可提供长期保护，防止铀尿石的氧化溶解。

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