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硫杆菌(Sulfobacillus thermosulfidooxidans,S. t菌)和氧化亚铁钩端螺旋菌(Leptospirillum ferrooxidans,L. f菌)浸出斑铜矿,通过接触角和Zeta电位测定,分析其吸附之后斑铜矿表面物理化学性质的变化,主要包括表面润湿性和表面电性的变化,并对比分析2种细菌对斑铜矿表面物理化学性质改变的异同.研究结果表明:单独9K培养基对于斑铜矿表面润...: Sulfobacillus thermosulfidooxidans and Leptospirillum ferrooxidans cultured in the same 9K medium were used for the bioleaching of bornite. The variation of surface physicochemical properties mainly of surface......
微生物浸出技术,选用4种中度嗜热浸矿菌:嗜铁钩端螺旋菌(Leptospirillum ferriphilum),嗜酸喜温硫杆菌(Acidithiobacillus caldus),嗜热硫氧化硫化杆菌(Sulfobacillus thermosulfidooxidans)和嗜热嗜酸铁质菌(Ferroplasma thermophilum),作为混合菌回收废弃线路板分选尾渣中的金属铜.通过摇瓶浸出实验...属富集物,45 h后,浸出96.8%Cu;98 h后,浸出88.2%Al,91.6%Zn.BRYAN等[[13]利用黄铁矿作为生物浸出电子废弃物的浸滤剂来源,研究了混合菌在不同金属离子及不同浓度线路板中的浸出情况与群落结构变化;RODRIGUES等[14]在转鼓反应器中利用中度嗜热菌Sulfobacillus thermosulfidooxidans提取粗磨线路板中金属铜,在优化条件下,8 d后铜......
; 要:采用3种中等嗜热微生物:喜温硫杆菌(Acidithiobacillus caldus,A.c),嗜铁钩端螺旋菌(Leptospirillum ferriphilu,L.f),嗜热氧化硫化杆菌(Sulfobacillus thermosulfidooxidans,S.t)对黄铜矿精矿进行浸出.探讨浸出过程中的微生物生长优化及搅拌反应器浸出条件优化.微生物最佳生长条件如下:生长温度为45 ℃,初始... 21.46%,S 35.39%,Fe 23.90%,Zn 8.40%,Pb 5.02%(质量分数). 1.2 微生物 本试验中采用的是3种中等嗜热菌:喜温硫杆菌(Acidithiobacillus caldus,A.c),嗜铁钩端螺旋菌(Leptospirillum ferriphilu,L.f),嗜热氧化硫化杆菌(Sulfobacillus thermosulfidooxidans,S.t......
media Moderately thermophilic bacteria, including Acidithiobacillus caldus (A. caldus ), Sulfobacillus thermosulfidooxidans (S. thermosulfidooxidans) and Leptospirillum ferriphilum (L. ferriphilum), were..., S. thermosulfidooxidans and L. ferriphilum. The low kinetics of dissolution of chalcopyrite in A. caldus can be mainly attributed to the incomplete dissolution of chalcopyrite and the passivation......
中度嗜热菌浸出黄铁矿过程中矿物表面硫的化学形态何环1,杨益2,夏金兰2,陶秀祥1,赵屹东31. 中国矿业大学化工学院煤炭加工与洁净利用教育部重点实验室2. 中南大学资源加工与生物工程学院生物冶金教育部重点实验室3. 中国科学院高能物理研究所国家同步辐射实验室摘 要:利用扫描电镜(SEM),X射线衍射(XRD)和硫的K边X射线吸收近边结构光谱(XANES)等分析手段研究了中度嗜热菌(Sulfobacillus thermosulfidooxidans)浸出黄铁矿过程及矿物表面硫的化学形态.结果表明:中度嗜热菌明显促进了黄铁矿的溶出,24 d浸出液中总铁的质量浓度达到5.3 g.L-1.经24 d细菌处理后,矿物表面形貌变化明显,出现良好结晶状态的晶体.浸出过程中累积在黄铁矿表面的主要成分是黄钾铁矾.矿物......
sp.含量很低,但是随着浸出时间的延长,其占的比例越来越高,并且在30 ℃浸出条件下的丰度高于在45 ℃浸出条件下的.Acidiphilium sp.不仅能够利用自养菌如Acidithiobacillus caldus,Leptospirillum ferriphilum和Sulfobacillus thermosulfidooxidans等代谢产生的有机物作为能源,而且在生长过程中会产生有机酸...群落结构及其动态变化,当浸出温度为30℃,Acidithiobacillus caldus和Acidiphilium sp.是主要浸矿菌;当浸出温度为45℃时,Sulfobacillus sp.和Acidithiobacillus caldus是优势种群. 关键词:铜矿;温度;生物浸出;群落动态;Illumina Miseq测序 中图分类号:TF 18  ......
consortium of bioleaching bacteria including Acidithiobacillus caldus, A. thiooxidans, A. ferrooxidans, Sulfobacillus thermosulfidooxidans, Acidiphilium spp., and Ferroplasma thermophilum cultured.... DX1-1 promoted the growth of Ferroplasma L1, inhibited that of S. thermosulfidooxidans ST, and exerted little effect on that of A. ferrooxidans CMS. Genes encoding ADP heptose, phosphoheptose isomerase......
面接触角,Zeta电位和表面形貌变化,研究嗜热硫氧化硫杆菌(Sulfobacillus thermosulfidooxidans,S.t菌)和氧化亚铁钩端螺旋菌(Leptospirillum ferrooxidans,L.f菌)对黄铜矿表面性质的影响.结果表明,细菌培养基(9K培养基)对黄铜矿表面性质无明显影响,接触角稳定在黄铜矿表面接触角48°左右.两种细菌对黄铜矿表面性质影响规律相似,采用细菌...) Abstract:The effects of Sulfobacillus thermosulfidooxidans and Leptospirillum ferrooxidans on the surface properties of chalcopyrite were investigated by analyzing the contact angle, Zeta-potential......
ferriphilum YSK, Acidithiobacillus caldus D1 and Sulfobacillus thermosulfidooxidans ST. The results of bioleaching experiments showed that the leaching efficiency and the redox potential were significantly... thermophilic microorganisms, including Leptospirillum ferriphilum YSK, Acidithiobacillus caldus D1 and Sulfobacillus thermosulfidooxidans ST were obtained from the Key Laboratory......
实验.研究结果表明:中等嗜热菌在12~55 ℃时可保持浸矿活性,其最适生长温度为45~50 ℃,温度达到60 ℃时初始阶段还保持一定活性,但几天后菌浓度逐渐降低,种群比例发生较大变化;克隆文库分析表明:45 ℃和60 ℃条件下浸矿细菌主要为Leptospirillum ferriphilum,Acidithiobacillus caldus,Sulfobacillus thermotolerans.... 16S rDNA clone library reveals that the composition of moderate thermophiles at 45 ℃ and 60 ℃ are mainly Leptospirillum ferriphilum, Acidithiobacillus caldus, Sulfobacillus thermotolerans......