Article(id=1236327380697010886, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327378968965364, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.05.023, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1683302400000, receivedDateStr=2023-05-06, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772693017407, onlineDateStr=2026-03-05, pubDate=1696089600000, pubDateStr=2023-10-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772693017407, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772693017407, creator=13701087609, updateTime=1772693017407, updator=13701087609, issue=Issue{id=1236327378968965364, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='5', pageStart='1', pageEnd='177', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772693016997, creator=13701087609, updateTime=1772693111855, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236327776882577759, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327378968965364, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236327776882577760, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327378968965364, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=98, endPage=102, ext={EN=ArticleExt(id=1236327381011583695, articleId=1236327380697010886, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Influence of Magnetite on Bioleaching of Chalcopyrite by Acidithiobacillus Ferrooxidans, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=

The influence of magnetite on bioleaching of chalcopyrite by Acidithiobacillus ferrooxidans was systematically explored by electrochemical tests such as open-circuit potential and cyclic voltammetry. Results show that the leaching rate of chalcopyrite can be increased by increasing the addtion of magnetite in the leaching system by undomesticated bacteria. The bacteria after domestication presents enhanced activity. With the addition of magnetite at an amount of 0.5 g, the copper leaching rate can be increased by around 8%. With the addtion of magnetite at an amout over 0.5 g, jarosite is generated during the leaching process, which can worsen the leaching environment, leading to the copper leaching rate just up by about 2%. The open circuit potential of chalcopyrite is always higher than that of magnetite in the system with different concentrations of Fe³⁺. During the galvanic reaction between chalcopyrite and magnetite, chalcopyrite acts as the cathode, which is not conducive to oxidation and dissolution of chalcopyrite. However, Fe³⁺in the solution can increase the corrosion rate of chalcopyrite, leading to an increased leaching rate of chalcopyrite.

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采用开路电位、循环伏安曲线等电化学测试方法，系统研究了磁铁矿对氧化亚铁硫杆菌（Acidithiobacillus ferrooxidans）微生物浸出黄铜矿的影响。结果表明，未驯化菌浸出体系中，黄铜矿浸出率随磁铁矿添加量增大而增大；细菌驯化后，细菌活性增强，当磁铁矿添加量为0.5 g时，铜浸出率可提高8%左右；当磁铁矿添加量大于0.5 g时浸出过程中生成了黄钾铁矾，恶化了浸出环境，铜浸出率仅提升2%左右；在不同浓度Fe³⁺体系中，黄铜矿开路电位始终高于磁铁矿开路电位，两者间发生伽伐尼作用时，黄铜矿作阴极，不利于黄铜矿氧化溶解；但溶液中Fe³⁺可以提高黄铜矿的腐蚀速率，从而提高黄铜矿浸出率。

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邓莎（1991—），女，陕西咸阳人，博士，副教授，主要从事微生物冶金及矿产资源综合利用研究。

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邓莎（1991—），女，陕西咸阳人，博士，副教授，主要从事微生物冶金及矿产资源综合利用研究。

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