CAJ | 학술논문

采用电化学测试和X射线光电子能谱(XPS)测试分析黄铜矿与斑铜矿在酸性细菌培养基中的电化学溶解过程。斑铜矿直接氧化反应比还原反应更容易发生，但黄铜矿既难被氧化，又难被还原。斑铜矿具有更高的氧化速率，从而比黄铜矿更容易被溶解。铜蓝(CuS)是黄铜矿与斑铜矿溶解过程的中间产物。因此，斑铜矿的溶解途径主要为直接氧化过程，中间产物铜蓝(CuS)可能限制其进一步溶解。黄铜矿的溶解途径包含了还原?氧化过程，其中，黄铜矿首先被还原为与斑铜矿类似的中间产物，再进一步被氧化，并产生铜蓝(CuS)，而黄铜矿的最初还原过程是其溶解过程的主要限制步骤。
채용전화학측시화X사선광전자능보(XPS)측시분석황동광여반동광재산성세균배양기중적전화학용해과정。반동광직접양화반응비환원반응경용역발생，단황동광기난피양화，우난피환원。반동광구유경고적양화속솔，종이비황동광경용역피용해。동람(CuS)시황동광여반동광용해과정적중간산물。인차，반동광적용해도경주요위직접양화과정，중간산물동람(CuS)가능한제기진일보용해。황동광적용해도경포함료환원?양화과정，기중，황동광수선피환원위여반동광유사적중간산물，재진일보피양화，병산생동람(CuS)，이황동광적최초환원과정시기용해과정적주요한제보취。
The electrochemical dissolution process of chalcopyrite and bornite in acid bacteria culture medium was investigated by electrochemical measurements and X-ray photoelectron spectroscopy (XPS) analysis. Bornite was much easier to be oxidized rather than to be reduced, and chalcopyrite was difficult to be both oxidized and reduced. The relatively higher copper extraction of bornite dissolution can be attributed to its higher oxidation rate. Covellite (CuS) was detected as the intermediate species during the dissolution processes of both bornite and chalcopyrite. Bornite dissolution was preferred to be a direct oxidation pathway, in which bornite was directly oxidized to covellite (CuS) and cupric ions, and the formed covellite (CuS) may inhibit the further dissolution. Chalcopyrite dissolution was preferred to be a continuous reduction?oxidation pathway, in which chalcopyrite was initially reduced to bornite, then oxidized to covellite (CuS), and the initial reduction reaction was the rate-limiting step.