| 氧化亚铁硫杆菌作用下形成的黄钾铁矾的SEM研究 |
| |
| 引用本文： | 朱长见,陆建军,陆现彩,王汝成,李奇.氧化亚铁硫杆菌作用下形成的黄钾铁矾的SEM研究[J].高校地质学报,2005,11(2):234-238. |
| |
| 作者姓名： | 朱长见 陆建军 陆现彩 王汝成 李奇 |
| |
| 作者单位： | 南京大学,地球科学系,内生金属矿床成矿机制研究国家重点实验室,南京,210093 |
| |
| 基金项目： | 国家自然科学基金项目(49673187)资助 |
| |
| 摘 要： | 黄钾铁矾是金属硫化物在酸性条件下氧化形成的主要次生矿物。很多研究表明，金属硫化物矿区广泛发育的氧化亚铁硫杆菌会影响金属硫化物的氧化分解和次生矿物的形成。为讨论氧化亚铁硫杆菌在黄钾铁矾形成过程中的作用，设计了两组平行实验制备黄钾铁矾：一种采用化学方法合成黄钾铁矾，另一种在相同条件下接种氧化亚铁硫杆菌合成黄钾铁矾。利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)和能谱分析仪(EDS)等技术对两种实验获得的黄钾铁矾进行定性分析和形貌观察。结果表明：在氧化亚铁硫杆菌充分繁殖的条件下，细菌的参与更利于黄钾铁矾的形成；Fe^2 的氧化速率可能是影响黄钾铁矾结晶的主要因素，氧化亚铁硫杆菌通过提高Fe^2 的供应速度促使黄钾铁矾快速结晶，细菌作用下形成的黄钾铁矾结晶程度好于纯化学方法制备的黄钾铁矾。
|
| 关 键 词： | 氧化亚铁硫杆菌 黄钾铁矾 扫描电镜 形貌特征 成分分析 |
| 文章编号： | 1006-7493(2005)02-0234-05 |
| 修稿时间： | 2005年3月15日 |
SEM Study on Jarosite Mediated by Thiobacillus ferrooxidans |
| |
| ZHU Chang-jian,LU Jian-jun,LU Xian-cai,Wang Ru-Cheng,LI Qi.SEM Study on Jarosite Mediated by Thiobacillus ferrooxidans[J].Geological Journal of China Universities,2005,11(2):234-238. |
| |
| Authors: | ZHU Chang-jian LU Jian-jun LU Xian-cai Wang Ru-Cheng LI Qi |
| |
| Abstract: | Jarosite is a major secondary mineral formed in acid supergene environment by oxidation of metal sulphide. Thiobacillus ferrooxidans occurring extensively in metal sulphide ore district has an important effect on oxidation of metal sulphide and formation of secondary minerals. In order to discuss the effect of Thiobacillus ferrooxidans on the formation of jarosite, two parallel experiments were conducted for preparation of jarosite: chemical experiment and biologically mediated experiment. The compositions and morphological features of these two groups of jarosites have been investigated by means of XRD, SEM and EDS. The study indicates that full propagation of Thiobacillus ferrooxidans in the solution is beneficial to the formation of jarosite. The oxidation rate of Fe 2+ in the solution is probably the main factor that affects crystallization of jarosite. Thiobacillus ferrooxidans induces a rapid crystallization of jarosite by increasing the supply rate of Fe 3+ on the mineral surface. Jarosite mediated by Thiobacillus ferrooxidans has a better crystalline form than that synthesized by chemical method. |
| |
| Keywords: | Thiobacillus ferrooxidans jarosite SEM morphological features compositional ayslysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
