Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles

Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles

Adhesion plays an important role in bacterial dissolution of metal sulfides, since the attached cells initiate the dissolution. In addition, biofilms, forming after bacterial attachment, enhance the dissolution. In this study, interactions between initial adhesion force, attachment behavior and copp...

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Main Authors: Qian Li, Baojun Yang, Jianyu Zhu, Hao Jiang, Jiaokun Li, Ruiyong Zhang, Wolfgang Sand
Format: Article
Language:English
Published: MDPI AG 2018-09-01
Series:Minerals
Subjects:
bioleaching
attachment
adhesion force
biofilm
atomic force microscopy
Online Access:http://www.mdpi.com/2075-163X/8/9/406
id doaj-f37b46050c9c425d8f2a7a3c0e7ff982
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spelling doaj-f37b46050c9c425d8f2a7a3c0e7ff9822020-11-25T02:32:23ZengMDPI AGMinerals2075-163X2018-09-018940610.3390/min8090406min8090406Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing AcidophilesQian Li0Baojun Yang1Jianyu Zhu2Hao Jiang3Jiaokun Li4Ruiyong Zhang5Wolfgang Sand6Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, ChinaFederal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655 Hannover, GermanyKey Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, ChinaAdhesion plays an important role in bacterial dissolution of metal sulfides, since the attached cells initiate the dissolution. In addition, biofilms, forming after bacterial attachment, enhance the dissolution. In this study, interactions between initial adhesion force, attachment behavior and copper recovery were comparatively analyzed for Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirillum ferrooxidans during bioleaching of chalcopyrite. The adhesion forces between bacteria and minerals were measured by atomic force microscopy (AFM). L. ferrooxidans had the largest adhesion force and attached best to chalcopyrite, while A. ferrooxidans exhibited the highest bioleaching of chalcopyrite. The results suggest that the biofilm formation, rather than the initial adhesion, is positively correlated with bioleaching efficiency.http://www.mdpi.com/2075-163X/8/9/406bioleachingattachmentadhesion forcebiofilmatomic force microscopy
collection DOAJ
language English
format Article
sources DOAJ
author Qian Li
Baojun Yang
Jianyu Zhu
Hao Jiang
Jiaokun Li
Ruiyong Zhang
Wolfgang Sand
spellingShingle Qian Li
Baojun Yang
Jianyu Zhu
Hao Jiang
Jiaokun Li
Ruiyong Zhang
Wolfgang Sand
Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
Minerals
bioleaching
attachment
adhesion force
biofilm
atomic force microscopy
author_facet Qian Li
Baojun Yang
Jianyu Zhu
Hao Jiang
Jiaokun Li
Ruiyong Zhang
Wolfgang Sand
author_sort Qian Li
title Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
title_short Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
title_full Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
title_fullStr Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
title_full_unstemmed Comparative Analysis of Attachment to Chalcopyrite of Three Mesophilic Iron and/or Sulfur-Oxidizing Acidophiles
title_sort comparative analysis of attachment to chalcopyrite of three mesophilic iron and/or sulfur-oxidizing acidophiles
publisher MDPI AG
series Minerals
issn 2075-163X
publishDate 2018-09-01
description Adhesion plays an important role in bacterial dissolution of metal sulfides, since the attached cells initiate the dissolution. In addition, biofilms, forming after bacterial attachment, enhance the dissolution. In this study, interactions between initial adhesion force, attachment behavior and copper recovery were comparatively analyzed for Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirillum ferrooxidans during bioleaching of chalcopyrite. The adhesion forces between bacteria and minerals were measured by atomic force microscopy (AFM). L. ferrooxidans had the largest adhesion force and attached best to chalcopyrite, while A. ferrooxidans exhibited the highest bioleaching of chalcopyrite. The results suggest that the biofilm formation, rather than the initial adhesion, is positively correlated with bioleaching efficiency.
topic bioleaching
attachment
adhesion force
biofilm
atomic force microscopy
url http://www.mdpi.com/2075-163X/8/9/406
work_keys_str_mv AT qianli comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT baojunyang comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT jianyuzhu comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT haojiang comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT jiaokunli comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT ruiyongzhang comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
AT wolfgangsand comparativeanalysisofattachmenttochalcopyriteofthreemesophilicironandorsulfuroxidizingacidophiles
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