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異養微生物異化還原大洋多金屬結核

Dissimilatory reduction of marine nodules with heterotrophic microbes

  • 摘要: 從太平洋海底沉積物中分離到的四株異養微生物,進行耐酸和耐金屬的馴化,在好氧和厭氧條件下進行異養微生物異化還原大洋多金屬結核的實驗,并分析了浸出機理.結果表明:厭氧浸出優于好氧浸出,pH控制在2.5~3,浸出時間為3d,浸出率可達98%.利用異養微生物還原浸出大洋多金屬礦浸出速率高,礦體無需通氣,投資低,易于操作,且環境友好,可在回收有價金屬的同時進行固體廢棄物和有機廢棄物綜合治理.

     

    Abstract: Four heterotrophic microbes were separated from deep sea floor sediment of the Pacific Ocean. The dissimilatory reduction principles of these heterotrophic microbes were explored after their acclimatization to acid and metals. The results indicate that anaerobic leaching is better than aerobic condition, the optimum pH range is 2.5 to 3, the leaching time is 3 d, and the leaching rate is up to 98%. It shows that dissimilatory reduction of marine nodules with heterotrophic microbes has such advantages as higher leaching rate, no ventilation, lower investment, easier operation and better environment. The solid and organic waste can be treated at the same time coupling valuable metal recovery.

     

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