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首页> 外文期刊>Biotechnology Progress >Kinetics of the bioleaching of chalcopyrite concentrate by acidophilicthermophile Acidianus brierleyi
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Kinetics of the bioleaching of chalcopyrite concentrate by acidophilicthermophile Acidianus brierleyi

机译：嗜酸嗜热菌Acidianus brierleyi生物浸出黄铜矿精矿的动力学

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摘要

The kinetics of leaching of high-grade chalcopyrite (CuFeS2) concentrate (38-53 mu m) by the acidophilic thermophilic bacterium, Acidianus brierleyi, was studied at 65 degrees C and pH 1.2 in a batch stirred reactor. The adsorption of A. brierleyi cells between the sulfide surface and solution was attained within the first 20 min of exposure to the mineral, and the equilibrium adsorption data were correlated with the Langmuir isotherm. The bioleaching was markedly accelerated in the presence of A. brierleyi, and greater than 90% leaching of copper in the concentrate was achieved within 10 days. The chalcopyrite leaching with A brierleyi was found to take place with a direct - attack by adsorbed cells on the mineral surface, the chemical leaching of chalcopyrite by ferric iron being insignificant. Rate data collected under a wide variety of operating variables were analyzed to determine kinetic and stoichiometric parameters for the microbial chalcopyrite leaching.
机译：在分批搅拌反应器中，研究了嗜酸性嗜热细菌酸性嗜酸性细菌Acidianus brierleyi在65℃和pH 1.2下浸出高级黄铜矿（CuFeS2）精矿（38-53μm）的动力学。在暴露于矿物的前20分钟内，在硫化物表面和溶液之间获得了Brierleyi细胞的吸附，并且平衡吸附数据与Langmuir等温线相关。在存在A. brierleyi的情况下，生物浸提明显加快，并且在10天内实现了浓缩物中铜的90％以上浸出。发现用A brierleyi浸出的黄铜矿发生在矿物表面上的吸附细胞直接攻击下，而三价铁对黄铜矿的化学浸出则微不足道。分析在各种操作变量下收集的速率数据，以确定微生物黄铜矿浸出的动力学和化学计量参数。

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