ph 值对浸矿细菌的活化以及金精矿脱砷的影响 - journal of .pdf

第29卷第11期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol29,No. 11 2008 年 11月 Journal of Northeastern niversity( Natural Science) Nov. 2 0 0 8 pH 1 1 2 1 崔日成, 杨洪英 , 张谷平 , 范 金 ( 1. , 110004; 2. , 110004) : 6 pH 1. 3, 1.5, 1. 7, 1. 8, 1.9, 2. 1, ,HQ-0211 pH 13~ 19 ,, , pH 17~ 19 ,, pH , 21, , pH , 13~ 15 , , : ;; ;HQ-0211 ; : TF 831 : A : 1005-3026(2008) 11-1597-04 Effect of pH Value on Activation of Bioleaching Bacteria and Dearsenification of Gold Ore Concentrates 1 1 2 1 C UI R i-cheng , YA N G H ong-ying , ZH A N G Gu-p ing , FA N Jin ( 1. School of Materials Metallurgy, Northeastern niversity, Shenyang 110004, China; 2. Schoolof Sciences, Northeastern niversity, Shenyang 110004, China. Correspondent: C I R-i cheng, E-mail: cuiricheng @ 163. com) 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 phaseof 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 lowe