Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution

作     者：Baojun Yang Wen Luo Maoxin Hong Jun Wang Xueduan Liu Min Gan Guanzhou Qiu Baojun Yang;Wen Luo;Maoxin Hong;Jun Wang;Xueduan Liu;Min Gan;Guanzhou Qiu

作者机构：School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China Key Laboratory of BiohydrometallurgyMinistry of EducationCentral South UniversityChangsha 410083China Department of DermatologyThe First Hospital of ChangshaChangsha 410005China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第4期

页      面：94-104页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the Natural Science Foundation of Hunan Province(No.2018JJ1041) National Natural Science Foundation of China(Nos.51774332,U1932129,51804350 and51934009) 

主　　题：Chalcopyrite Hematite Biodissolution Acid mine drainage Acidithiobacillus ferrooxidans 

摘      要：Even though biodissolution of chalcopyrite is considered to be one of the key contributors in the formation of acid mine drainage(AMD),there are few studies to control AMD by inhibiting chalcopyrite ***,a novel method of using hematite to inhibit chalcopyrite biodissolution was proposed and *** results indicated that chalcopyrite biodissolution could be significantly inhibited by hematite,which consequently decreased the formation of *** the presence of hematite,the final biodissolution rate of chalcopyrite decreased from 57.9%to 44.4%at 20 *** in turn suggested that the formation of AMD was effectively suppressed under such *** to the biodissolution results,mineral composition and morphology analyses,and electrochemical analysis,it was shown that hematite promoted the formation and accumulation of passivation substances(jarosite and Cu2-xS)on chalcopyrite surface,thus inhibiting the biodissolution of chalcopyrite and limiting the formation of AMD.