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研究了Penicillium janthinellum菌株GXCR对低品位黄铜矿中的Cu和Fe的生物淋滤浸出。结果表明摇浸淋滤效率优于静置浸没淋滤效率,对Cu的淋滤浸出效果最佳;在添加最佳碳源(10%蔗糖,W/V)、氮源(1.5%NaNO3,W/V)、摇浸淋滤和最佳条件组合(淋滤培养基初始pH 6.0,矿石大小200目,矿石浓度5%(W/V)和初始接种菌量3.0×105分生孢子/mL)时,Cu的浸出率达到87.31%(W/W);摇浸淋滤时影响Cu的生物浸出的主要因素是淋滤培养基初始pH(F>F0.05);对Cu和Fe淋滤起主要作用的有机酸分别是柠檬酸和草酸;浸没淋滤效率低是与柠檬酸和草酸产量低有关;GXCR的生物淋滤机制有2种:柠檬酸和草酸的生化作用和菌体附着生长所产生机械压力对矿石的破碎作用。
The bioleaching leaching of Cu and Fe from low grade chalcopyrite by Penicillium janthinellum strain GXCR was studied. The results showed that leaching leaching efficiency was superior to leaching leaching efficiency, and the leaching and leaching of Cu was the best. When adding optimal carbon source (10% sucrose, W / V), nitrogen source (1.5% NaNO3, V), rock leaching and the optimal conditions (initial pH 6.0 of the leaching medium, 200 mesh ore size, 5% (W / V) ore concentration and 3.0 × 105 conidia / mL initial inoculum size) , The leaching rate of Cu reached 87.31% (W / W). The main factors influencing the bioleaching of Cu during leaching leaching were the initial pH of leaching medium (F> F0.05) The organic acids used are citric acid and oxalic acid respectively. The low leaching leaching efficiency is related to the low production of citric acid and oxalic acid. There are two biological leaching mechanisms of GXCR: the biochemical effects of citric acid and oxalic acid, Mechanical pressure on the ore crushing effect.