Recovery of inorganic elements by enzymatically active manganese oxide

2015 Fiscal Year Final Research Report

• Project/Area Number: 25340094
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental conscious materials and recycle
• Research Institution: University of Shizuoka
• Principal Investigator: Tani Yukinori 静岡県立大学, 食品栄養科学部, 准教授 (10285190)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: マンガン酸化真菌 / 元素回収 / 水処理

Outline of Final Research Achievements

This study demonstrates the efficient ability of biogenic manganese oxides (BMO) produced by Acremonium strictum KR21-2 to sequester heavy metal ions (Mn(II), Co(II), Zn(II), Ni(II), Cd(II)) and rare earth element (Ce(III)). BMOs produced by A. strictum KR21-2 maintains Mn(II) oxidase activity and consequently can continue to oxidize Mn(II) to insoluble Mn(IV). This reduces the effect of competing Mn(II) on sequestration and provides new sorption site for heavy mental ions, resulting in enhanced sequestration efficiency. BMO can oxidize Co(II) to Co(III), and Ce(III) to Ce(IV). If BMOs is enzymatically active, reduced Mn(II) is readily reoxidized, resulting in a continuous oxidative sequestration of Co(II) and Ce(III) by BMOs.

Free Research Field

環境科学