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通过吸附和生物浸出实验考察利用嗜酸热古菌Acidianus copahuensis从Hualian矿中回收锌。经过在连四硫酸盐表面预处理的菌种具有比经其他能量供给剂预处理的菌种更强的矿物吸附能力,且此吸附能力可由所产生的体外聚合物调节。当加入连四硫酸盐时,用A.copahuensis生物浸取Hualian矿中的锌,其浸出率达100%。同时添加酵母和连四硫酸盐不仅能保持较高的锌浸出率,而且能加快浸出速率。添加连四硫酸盐后,培养基中锌的溶解动力学受化学反应控制;而在未添加连四硫酸盐培养基中,锌的溶解动力学受经过黄钾铁矾反应层的扩散控制。
Adsorption and bioleaching experiments were conducted to recover zinc from Hualian ore using Acidianus copahuensis. Bacteria that have been pretreated on the surface of tetrad sulfate have stronger mineral adsorption capacity than that of bacteria pretreated with other energy supply agents, and this adsorption capacity can be adjusted by the produced in vitro polymer. When adding tetrasulfate, the zinc in the Hualian ore was leached with A. copahuensis and the leaching rate was 100%. Adding yeast and tetrathionate simultaneously not only maintains a high zinc leach rate, but also speeds up the leaching rate. The kinetics of zinc solubilization in the medium is controlled by the chemical reaction after tetrathionate addition, whereas the dissolution kinetics of zinc are controlled by the diffusion of the jarosite reaction layer in the medium without tetrad sulfate.