Effect of pulp density on planktonic and attached community dynamics during bioleaching of chalcopyrite by a moderately thermophilic microbial culture under uncontrolled conditions

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

doi:10.1016/j.mineng.2014.03.012

Cited by 25 publications

(12 citation statements)

References 39 publications

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“… 43,44 Subsequently, ferrous ions formed from the former reactions ( eqn (2) and (3) ) were oxidized by iron oxidizers to promote the dissolution of chalcopyrite. 30 Compared with the indigenous leachate, increased ferrous concentration in systems B, C and D indicated stronger iron reactions in exogenous systems ( Fig. 2a ).…”

Section: Resultsmentioning

confidence: 93%

“…Total iron concentration in the four experimental systems increased rapidly from day 6, suggesting that the dissolution of chalcopyrite was significantly accelerated with the introduction of exogenous cells. 30 Differences among the four systems appeared from the RIC phase onwards. In this period, total iron concentration increased rapidly to a maximum value and then decreased.…”

Section: Resultsmentioning

confidence: 99%

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Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

et al. 2018

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

et al. 2018

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“…It can influence the oxygen mass transfer from gas to liquid phase, microbial adhesion and the release of toxic chemicals from solids to the solution (Wang et al, 2014). Thus, tests of the effect of the pulp density on the A. thiooxidans FG-01 strain as a function of the contact time were carried out.…”

Section: Effect Of the Catalyst Density And A Thiooxidans Fg-01 Actimentioning

confidence: 99%

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Ferreira

Sérvulo

Costa

et al. 2017

Braz. J. Chem. Eng.

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-This study evaluates the recovery of heavy metals employing a spent catalyst from the hydrodesulfurization (HDS) of diesel, with no chemical, thermal or physical pretreatment, using the bacterial strain Acidithiobacillus thiooxidans FG-01. Direct and indirect bioleaching tests were carried out in Erlenmeyer flasks (500 mL). The influence of the pulp density and supplementation with elemental sulfur on the bioleaching were also investigated. The spent catalyst contained organochlorines, petroleum hydrocarbons and heavy metals in its composition. The best recovery results (26% Al, 26% V and 39% Mo) were achieved in the two-stage (indirect) bioprocess, with a pulp density of 50 g/L. It was not possible to recover Co, Cu and Ni (< 5%) under any of the conditions tested. The bacterial strain A. thiooxidans FG-01 was found to be a promising candidate for the recovery of Al, V and Mo using the crude spent HDS catalyst.

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“…Leptospirillum and Ferroplasma are more abundant later in the leach when the iron concentrations are higher and possibly inhibitory to Acidithiobacillus and other species [99,104,105]. Microbial communities change with time in both heaps and tanks, influenced by parameters such as substrate content and availability, solution composition and acidity, solids loadings in tanks, and temperature [92,[102][103][104][106][107][108]. However, comparisons between studies tend to reveal a variety of effects as the communities respond to a combination of environmental parameters and, in many instances, to adapt to them with time [64].…”

Section: Biodiversity In Bioleaching Environmentsmentioning

confidence: 99%

“…Microbiological diversity to genus level in heaps (H), and agitated tanks (T); A, attached; P, planktonic cells; % solids loading. Data collated from[97][98][99][100][101][102].…”

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confidence: 99%

Microbiological Advances in Biohydrometallurgy

Watling

2016

Minerals

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The most exciting advances in biohydrometallurgy are occurring in the field of microbiology. The two main technologies employed in biohydrometallurgy, agitated tanks for the processing of refractory concentrates and heaps and dumps for the processing of low-grade ores, are technologically sound and widely practised at commercial scale, but their development began at a time when very little was known of the microorganisms that assisted metals extraction from sulfide ores. During and subsequent to those developments it has been shown that microbial communities in metals extraction are more diverse than originally thought, and extremely robust and adaptable to different and variable environments. Recent advances in genomics and proteomics, exploiting hugely increased computing power and speed, have made it possible to describe not only which microorganisms are present in bioleaching systems, but also what physiological functions are being exercised. The body of knowledge being acquired through the application of molecular biology methods will be used increasingly to monitor microbial behaviour, optimise conditions for more appropriate microbiological activity and/or infer the "microbiological health" of bioreactors (tanks and heaps).

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Effect of pulp density on planktonic and attached community dynamics during bioleaching of chalcopyrite by a moderately thermophilic microbial culture under uncontrolled conditions

Cited by 25 publications

References 39 publications

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Microbiological Advances in Biohydrometallurgy

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