Construction of a heavy metal collection system by immobilized high revitalization iron- oxidization bacterium on electrochemical cultivation

2014 Fiscal Year Final Research Report

• Project/Area Number: 24510100
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental technology/Environmental materials
• Research Institution: Okayama University
• Principal Investigator: TAKEUCHI Fumiaki 岡山大学, 環境管理センター, 准教授 (90294446)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 鉄酸化細菌 / A. ferrooxidans / 高活性株 / 環境浄化 / 資源回収 / 生化学的解析 / 電気培養 / 微生物固定化

Outline of Final Research Achievements

Acidithiobacillus ferrooxidans MON-l was immobilized on various pellet-shaped grains for volatilization and recovery of mercury from mercury-polluted soil and wastewater. The bacterium was grown by electrochemical cultivation at 30℃ in 9K ferrous iron medium (pH 2.5). In the present study, a highly efficient electrochemical cultivation system was developed. The immobilized A. ferrooxidans MON-1 cells can volatilize both inorganic and organic mercuric compounds from mercury medium. This study shows feasible and economical immobilization materials for the bioremediation treatment of mercuric compounds. In addition, the enzyme of iron-oxidization bacterium used for the bioleaching was clarified.

Free Research Field

環境応用微生物