Impact Factor:2.917
DOI number:10.1016/S1003-6326(21)65617-0
Affiliation of Author(s):Central South University
Journal:TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Abstract:The column bioleaching of copper flotation tailings was comparatively investigated using layered heap construction method (LM), agglomerate heap construction method (AM), and pellets-sintering heap construction method (PM). The bacterial communities of free, attached, weakly-attached, and strongly-attached microbes in the later bioleaching stage were investigated. In AM group, the addition of lump sulphide ore resulted in the low leachate pH, high ferric iron concentration, and rapid microbial adsorption, which obtained the maximum copper extraction (60.1%) compared with LM (54.6%) and PM (43.9%) groups. The relative abundance of dominant genera and microbial communities of different microbiota underwent changes in three heap construction methods. The alpha-diversity indexes of attached, weakly-attached, and strongly-attached microbes were different, while no significant change was observed in free bacteria. The variation of whole bacterial community was significantly associated with solution pH, total iron, and ferric iron concentrations. Pearson correlation analysis and partial least square path model both indicated that attached bacteria made larger contribution to the extraction of tailings.
Co-author:Xueduan Liu, Ping Zhu, Yili Liang, Guanzhou Qiu, Hongqing Ma, Liying Ren, Sarkodie Emmanuel Konadu, Hongwei Liu*
First Author:Xiaodong Hao
Indexed by:Journal paper
Document Type:J
Volume:31
Issue:6
Page Number:1796-1805
ISSN No.:1003-6326
Translation or Not:no
Included Journals:SCI