THE GROWTH PROCESS AND THE MINERALOGY OF MANGANESE OXIDES BY MOCROBIAL MEDIATION

微生物介导下氧化锰的生长过程和矿物学

基本信息

批准号：
09640585
负责人：
SATO Yoshio
金额：
$ 1.86万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Many slide glasses were set up in the well seawater supply system for aquaria at the Marine Science Museum of Tokai University, where manganese oxides are precipitating by microbial mediation. Manganese- oxidizing bacteria and oxides on the slide glasses were examined in time-series and the growth process of manganese oxides was observed. At first, bacteria attached to the slide glass scatteringly and then got together. The clumped bacteria were decomposed by bacteriolysis. With bacteriolysis, manganese oxides started to precipitate. Manganese oxides grew from doughnut-shaped holdfasts to cauliflower-shaped ones through dome-shaped ones. The honeycomb structure characteristic to marine manganates appeared on the doughnut-shaped holdfasts.Manganese oxide minerals formed by microbial mediation in seawater (MnィイD12+ィエD1:ca.50 ppm; pH: ca.8.0) were investigated by combinations of various manganese-oxidizing bacteria and seawater. The minerals produced were hydrohausmannite, feitknechtite (β-MnOOH), manganite (γ-MnOOH), 10 AィイD4゜ィエD4 manganate (buserite or todorokite) and unnamed MnOィイD22ィエD2 mineral (JCPDS Card: 42-1316), although manganese oxides were not precipitated in some bacterium-seawater combinations. Each oxide mineral was formed by direct oxidation of MnィイD12+ィエD1 without intermediates. High valence oxides were formed when the manganese-oxidizing activity of bacteria was high, and vice versa. Mn(IV) oxide minerals in marine environments may be formed by microbial catalysis rather than by pure inorganic processes.

在托卡伊大学海洋科学博物馆的海水供应系统中，在海水供应系统中设立了许多滑梯，那里的锰氧化物通过微生物调解引起了锰氧化物。在时间序列中检查了玻璃玻璃上的锰 - 氧化细菌和氧化物，并观察到锰氧化物的生长过程。起初，细菌散布在滑梯玻璃上，然后聚在一起。簇的细菌被细菌分解。使用细菌，锰氧化物开始沉淀。锰氧化物从甜点形的持有物中生长，通过圆顶形的氧化物形成花椰菜形的氧化物。海水的蜂窝状结构出现在海水中的锰氧化物矿物质上。通过在海水中的微生物介导形成的孟那氧化物矿物质（MNI D12+IE D1：Ca.50 ppm; PH：Ca.8.0）通过各种含量的含量含量的氧化物氧化细菌和氧化细菌的组合研究了。生产的矿物质为氢豪斯（Hydrohausmannite），Feitnechtite（β-MnOOH），锰矿（γ-MNOOH），10 AI D4 D4 Manganate（buserite或todorokite）（buserite或todorokite）和未命名的mnoi d22 Mnoaral（JCPDS卡：JCPTS卡：42-1316），虽然是含有型含有型含有型含量的Manganease氧化物。每种氧化物矿物质都是通过无中间体的MNI D12+I D1直接氧化而形成的。当细菌的锰氧化活性高时，形成高价氧化物，反之亦然。海洋环境中的Mn（IV）氧化物矿物质可以通过微生物催化而不是通过纯无机过程形成。