title: Adhesion forces between cells of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans or Leptospirillum ferrooxidans and chalcopyrite.
abstract: The efficiency of copper leaching is improved by bacteria attached to chalcopyrite. Therefore, the study of the attachment mechanism to control leaching is important. The adhesion of three species of leaching microorganisms including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans to chalcopyrite was investigated by using atomic force microscopy (AFM). The forces were measured with tip-immobilized cells approached to and retracted from the mineral. The results show that both the surface charge and the hydrophobicity of bacteria cells influence the adhesion force. Furthermore, the adhesion force decreased in case the extracellular polymeric substances (EPS) had been removed. In addition, the data indicate that the amount of attached cells increased with increasing adhesion force.
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, Changsha, China.
authors.forename: Jianyu
authors.initials: J
authors.lastname: Zhu
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.forename: Weifeng
authors.initials: W
authors.lastname: Jiao
authors.forename: Hao
authors.initials: H
authors.lastname: Jiang
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Sand
authors.forename: Jinlan
authors.initials: J
authors.lastname: Xia
authors.forename: Xueduan
authors.initials: X
authors.lastname: Liu
authors.forename: Wenqing
authors.initials: W
authors.lastname: Qin
authors.forename: Guanzhou
authors.initials: G
authors.lastname: Qiu
authors.forename: Yuehua
authors.initials: Y
authors.lastname: Hu
authors.forename: Liyuan
authors.initials: L
authors.lastname: Chai
mesh_terms: D042763:Acidithiobacillus / Q000737:chemistry* / Q000378:metabolism; D013856:Acidithiobacillus thiooxidans / Q000737:chemistry* / Q000378:metabolism; D001422:Bacterial Adhesion; D001709:Biotechnology / Q000379:methods; D018914:Cells, Immobilized; D003300:Copper / Q000737:chemistry / Q000302:isolation & purification*; D057927:Hydrophobic and Hydrophilic Interactions; D018625:Microscopy, Atomic Force; D008906:Mining; D055672:Static Electricity
chemical_list: C012819:chalcopyrite; D003300:Copper