CAS OpenIR
acidithiobacillusferrooxidans对软锰矿浸出的影响
康金星1; 冯雅丽1; 李浩然2; 杜竹玮2; 邓祥意1; 王洪君1
2019
Source Publication工程科学学报
ISSN2095-9389
Volume000Issue:005Pages:591
Abstract利用循环伏安、交流阻抗谱和极化曲线研究了Acidithiobacillus ferrooxidans对软锰矿在模拟浸出溶液(9K基础培养基,A. ferrooxidans,Fe(Ⅲ),A. ferrooxidans+Fe(Ⅲ))中电化学腐蚀行为的影响;利用模拟有菌/无菌浸出溶液中钝化膜的Mott-Schottky理论比较了有无细菌存在情况下形成的钝化膜的优劣性.结果表明,A. ferrooxidans促进MnO2/Mn2+氧化还原转化,催化MnO2/Mn(OH)2电极反应;加速软锰矿/溶液界面电子交换,无铁存在时A. ferrooxidans使电荷转移内阻降低34%,比含Fe(Ⅲ)无菌体系低11%;引起软锰矿电极极化,增强其氧化活性;加速MnO2向MnO·OH转化及其产物扩散. A. ferrooxidans与软锰矿作用更倾向于间接作用机理.在选取的各模拟电解液(pH值为2. 0)中,0. 2~0. 4 V区间内软锰矿形成耗尽层,在模拟浸出溶液中形成的钝化膜都表现出p-n-p-n型半导体性能.在选取的0. 2 V极化电位下,无铁时引入A. ferrooxidans使膜中的施主/受主密度减少,细菌含有多种基团参与半导体/溶液界面电子转移反应,接受界面间自由电子或填充空穴,促使软锰矿与溶液界面物质交换变频繁;含铁溶液中加入A. ferrooxidans使得钝化膜受主/施主密度增大,A. ferrooxidans降低了膜的耐腐蚀性,因而促进软锰矿浸出.
Language英语
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/33686
Collection中国科学院过程工程研究所
Affiliation1.北京科技大学
2.中国科学院过程工程研究所
Recommended Citation
GB/T 7714
康金星,冯雅丽,李浩然,等. acidithiobacillusferrooxidans对软锰矿浸出的影响[J]. 工程科学学报,2019,000(005):591.
APA 康金星,冯雅丽,李浩然,杜竹玮,邓祥意,&王洪君.(2019).acidithiobacillusferrooxidans对软锰矿浸出的影响.工程科学学报,000(005),591.
MLA 康金星,et al."acidithiobacillusferrooxidans对软锰矿浸出的影响".工程科学学报 000.005(2019):591.
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