Bioleaching of chalcopyrite by defined mixed moderately thermophilic consortium including a marine acidophilic halotolerant bacterium

Wang, Yuguang; Su, Liumei; Zhang, Lijuan; Zeng, Weimin; Wu, Jin; Wan, Lili; Qiu, Guanzhou; Chen, Xinhua; Zhou, Hongbo

doi:10.1016/j.biortech.2012.06.114

Cited by 53 publications

(24 citation statements)

References 32 publications

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“…In our previous study, it was revealed that the proportional relationship of 16 s rRNA gene copies of different strains was approximate equal to the proportion of each microbe present in the sample (Wang et al, 2012), which was also demonstrated by Liu et al (2006). Therefore, influence of re-inoculation on the dynamics of microbiota was evaluated by qPCR (Liu et al, 2006;Wang et al, 2012;Zeng et al, 2010) and presented in Figs. 6 and 7.…”

Section: Influence Of Different Re-inoculation Strategies On the Micrmentioning

confidence: 94%

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Enhancement in copper extraction from chalcopyrite by re-inoculation of different acidophilic, moderately thermophilic microorganisms

Zhang

Feng

et al. 2015

Hydrometallurgy

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Section: Influence Of Different Re-inoculation Strategies On the Micrmentioning

confidence: 94%

“…Controls without template for each primer were performed, and all tests were conducted in triplicate. The detailed steps for quantitative analysis of microbial community were as described (Liu et al, 2006;Wang et al, 2012;Zhang et al, 2009).…”

Section: Analysis Of Population Dynamics By Real-time Quantitative Pcmentioning

confidence: 99%

Enhancement in copper extraction from chalcopyrite by re-inoculation of different acidophilic, moderately thermophilic microorganisms

Zhang

Feng

et al. 2015

Hydrometallurgy

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“…The primers used for real-time polymerase chain reaction (real-time PCR) is listed in Table 1 (Li et al 2011;Wang et al 2012). Conventional PCR was performed with a Bio-Rad.…”

Section: Stirred Tank Reactor Bioleaching Experimentsmentioning

confidence: 99%

“…The negative controls were also designed. Procedures of PCR and qPCR were as described by previous research studies (Li et al 2011;Wang et al 2012;Zeng et al 2010;Zhang et al 2009). All tests were conducted in triplicate.…”

Section: Stirred Tank Reactor Bioleaching Experimentsmentioning

confidence: 99%

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

Gan

Zhou

et al. 2014

Environ Sci Pollut Res

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A defined mesophile consortium including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirilum ferriphilum was applied in bioleaching sediments contaminated with multiple heavy metals. Flask experiments showed that sulfur favored the acidification in the early stage while pyrite led to a great acidification potential in the later stage. An equal sulfur/pyrite ratio got the best acidification effect. Substrate utilization started with sulfur in the early stage, and then the pH decline and the community shift give rise to the utilization of pyrite. Solubilization efficiency of Zn, Cu, Mn, and Cd reached 96.1, 93.3, 92.13, and 87.65%, respectively. Bioleaching efficiency of other elements (As, Hg, Pb) was not more than 30%. Heavy metal solubilization was highly negatively correlated with pH variation. Logistic models were well fitted with the solubilization efficiency, which can be used to predict the bioleaching process. The dominant species in the early stage of bioleaching were A. ferrooxidans and A. thiooxidans, and the abundance of L. ferriphilum increased together with pyrite utilization and pH decline.

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“…It has been documented that some catalytic agents (e.g., Ag + , polyethylene glycol and Cl − ) were used to improve the copper sulfide ores dissolution [4,5]. Ag + catalysis is due to the formation of a complex porous layer on sulfide mineral particles instead of the deposition of a tenacious sulfur layer.…”

Section: Introductionmentioning

confidence: 99%

Carbon Material with High Specific Surface Area Improves Complex Copper Ores’ Bioleaching Efficiency by Mixed Moderate Thermophiles

et al. 2018

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Abstract:The catalysis of carbon materials with different specific surface areas (SSA) (2, 400, 800 and 1200 m 2 /g) on complex copper ores bioleaching by moderately mixed thermophiles was investigated. The copper extractions increased with the rise in SSA of carbon materials. A recovery of 98.8% copper in the presence of 1200 m 2 /g activated carbon was achieved, and improved by 30.7% and 76.4% compared with biotic control and chemical leaching. Moreover, the addition of 1200 m 2 /g activated carbon adsorbed large amount of bacteria, accelerated the oxidation rate of ferrous iron and maintained the solution redox potential at relatively low values, and significantly increased the dissolution of primary copper sulfide (62.7%) compared to biotic control (6.0%). Microbial community succession revealed that activated carbon changed the microbial community composition dramatically. The S. thermosulfidooxidans ST strain gained a competitive advantage and dominated the microbial community through the whole bioleaching process. The promoting effect of carbon material with higher SSA on copper extraction was mainly attributed to better galvanic interaction, biofilm formation, direct contact and lower redox potential.

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Bioleaching of chalcopyrite by defined mixed moderately thermophilic consortium including a marine acidophilic halotolerant bacterium

Cited by 53 publications

References 32 publications

Enhancement in copper extraction from chalcopyrite by re-inoculation of different acidophilic, moderately thermophilic microorganisms

Enhancement in copper extraction from chalcopyrite by re-inoculation of different acidophilic, moderately thermophilic microorganisms

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

Carbon Material with High Specific Surface Area Improves Complex Copper Ores’ Bioleaching Efficiency by Mixed Moderate Thermophiles

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