Bioleaching of silver sulfide

硫化银的生物浸出

• 批准号: 02650445
• 负责人: NAKAZAWA Hiroshi
• 金额: $ 1.09万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650445/
• 关键词: Thiobacillus ferrooxidans; Silver sulfide; Bioleaching; Ferrous ion oxidation activity; Elemental sulfur oxidation activity; Silver tolerance; Copper tolerance; Inhibition; 化学合成無機栄養菌; 銀イオン; 馴養

To examine the application of Thiobacillus ferrooxidans in the leaching of silver sulfide, effect of silver ion on the ferrous ion and elemental sulfur oxidation activities of T. ferrooxidans was investigated.11 strains of T. ferrooxidans used in this study were isolated from the waters of sulfide mineral mines and a smelter in Japan.Silver ion inhibited ferrous ion oxidation activity of T. ferrooxidans. Oxidation rate decreased as silver concentration increased. Maximum silver concentration that bacteria could oxidize. 90% of ferrous ion(initial concentration 4.0x10^<-2>mol/1)at is from 0. llppm to 0.28ppm. A Copper tolerant strain that grew, -in the mediums with gradually increasing copper concentration up to-13g/l had higher silver tolerance. The strain oxidized 90% of ferrous ion at the silver concentration of l. Oppm. A nickel tolerant strain that grew in the medium with gradually increasing nickel concentration up to log/l had less silver tolerance.Elemental sulfur oxidation activity of T. ferrooxidans was inhibited at the silver concentration of 5ppm. An adapted strain that grew in the medium with gradually increasing silver concentration oxidized elemental sulfur at the silver concentration of 5ppm.

为考察氧化亚铁硫杆菌在硫化银浸出中的应用，研究了银离子对氧化亚铁硫杆菌氧化亚铁离子和单质硫活性的影响。11株T.本研究所用的T. ferrooxidans是从日本的硫化矿和冶炼厂的沃茨中分离得到的，银离子抑制T. ferrooxidans的亚铁离子氧化活性。氧化亚铁氧化速率随银浓度的增加而降低。细菌可氧化的最大银浓度。90%的亚铁离子（初始浓度为4.0 × 10 ~ <-2>4 mol/l）在0. 11 ppm至0.28ppm。耐铜菌株在铜浓度逐渐增加至-13 g/l的培养基中生长，耐银能力较高。该菌株在银浓度为1. 5 g/L时，亚铁离子的氧化率可达90%.噢。耐镍菌株在逐渐增加镍浓度至对数/升的培养基中生长，耐银能力较低。在银浓度为5 ppm时，氧化亚铁酶被抑制。在银浓度逐渐增加的培养基中生长的适应菌株在银浓度为5 ppm时氧化元素硫。

项目成果

中澤 廣: "鉄酸化菌の鉄酸化活性におよぼす銀イオンの影響" 1992年度資源・素材学会研究・業績発表講演会講演要旨集. (1992)

Hiroshi Nakazawa：“银离子对铁氧化细菌的铁氧化活性的影响”日本资源材料学会 1992 年研究和成果演讲摘要（1992 年）。

Hiroshi Nakazawa: "Effect of silver ion on the ferrous ion oxidation activity of T. ferrooxidans" MMIJ, Spring meeting Proceedings. (1992)

Hiroshi Nakazawa：“银离子对氧化亚铁菌亚铁离子氧化活性的影响”MMIJ，春季会议论文集。