东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (11): 1597-1600.DOI: -

• 论著 • 上一篇    下一篇

pH值对浸矿细菌的活化以及金精矿脱砷的影响

崔日成;杨洪英;张谷平;范金;   

  1. 东北大学材料与冶金学院;东北大学理学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-11-15 发布日期:2013-06-22
  • 通讯作者: Cui, R.-C.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50674029);;

Effect of pH value on activation of bioleaching bacteria and dearsenification of gold ore concentrates

Cui, Ri-Cheng (1); Yang, Hong-Ying (1); Zhang, Gu-Ping (2); Fan, Jin (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-11-15 Published:2013-06-22
  • Contact: Cui, R.-C.
  • About author:-
  • Supported by:
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摘要： 通过在摇瓶中设定6个不同初始pH值梯度1.3,1.5,1.7,1.8,1.9,2.1,对细菌的活化以及高砷金精矿的脱砷浸出进行了研究.细菌活化阶段,HQ-0211菌在pH值1.3~1.9范围更加适应,活化速度快,氧化效果好.高砷金精矿细菌脱砷阶段,初始pH值在1.7~1.9范围最利于细菌浸矿,停滞期短,氧化速度快.初始pH值较高,为2.1时,细菌会较快进入衰亡期,不适于细菌浸矿.初始pH值较低,为1.3~1.5时,细菌适应停滞期长,氧化脱砷速度缓慢.

关键词: 浸矿细菌, 活化作用, 高砷金精矿, HQ-0211菌, 脱砷

Abstract: The activation of bacteria and dearsenification of high-As gold ore concentrates for leaching were studied experimentally the way there were six different initial pH gradients set in shaking flasks, i.e., 1.3, 1.5, 1.7, 1.8, 1.9 and 2.1. In the phase of bacterial activation, the bacteria HQ-0211 in the range from 1.3 to 1.9 are more adaptable to activate faster with better oxidation effect. In the phase of dearsenification of high-As gold ore concentrates, the optimum initial pH value for bioleaching is in the range from 1.7 to 1.9, with short stagnation and fast oxidation. When the pH value becomes higher, e.g., up to 2.1, the bacteria will quickly come into their decline phase, so unavailable to bioleaching. With the lower initial pH value in the range from 1.3 to 1.5, the bacteria will fit the long stagnation phase with slow oxidation/dearsenification.

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