Microbiological leaching of a zinc sulfide concentrate

Torma, A.E.; Walden, C. C.; Branion, R. M. R.

doi:10.1002/bit.260120403

Cited by 104 publications

(44 citation statements)

References 34 publications

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“…ferrooxidans. Probably for these reasons it has not always been possible t o show that magnesium is an essential trace element in microbiological leaching systems (TORMA et al 1970). N u t r i e n t b a l a n c e i n l e a c h i n g p r o c e s s e s Several inorganic media have been described for isolation and maintenance of cultures of iron-oxidizing bacteria (LEATHEN et al 1953, BRYNER and ANDER-SON 1967, BRYNER and JAMESON 1958, SILVERMAN and LUNDGREN 1959a.…”

Section: Magnesiummentioning

confidence: 98%

Biology of Thiobacillus ferrooxidans in relation to the microbiological leaching of sulphide ores

Tuovinen

Kelly

1972

J of Basic Microbiology

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Although chemolithotrophy in bacteria using iron oxidation as a source of energy for CO, assimilation and growth was proposed by WINOGRADSKY (1888) during the earliest studies of autotrophic bacteria, the existence of such bacteria was subsequently seriously doubted (BAAS BECKING and PARKS 1927, LEES 1955). I n the past 20 years, studies on Thiobacillus ferrooxidans have demonstrated beyond all doubt that the oxidation of ferrous to ferric iron can supply all the energy needed by it to support growth. These bacteria require low pII and generally exhibit a remarkable tolerance to dissolved metal ions. As well as oxidizing Fe2+ they will also oxidize inorganic sulphur compounds and can thus be classified as thiobacilli. Three distinct names are, however, used in the literature : Thiobacillus ferrooxidans, Ferrobacillus ferrooxidans and F . sulfooxidans (TEMPLE and COLMER 1951, LEATHEN et al. 1956, KINSEL 1960. I n our view, supported by a number of published comments, all types are basically the same, and the name given to the earliest named iron-oxidizer, Thiobacillus ferrooxidans HINKLE 1947, TEMPLE andCOLMER 1951) is the only correct one for all the "ferrobacilli", and is used in this paper to describe all the strains used hitherto.Our aim in this paper is to review current views and recent advances relating to the physiology and ecology of T . ferrooxidans and to consider these facts in relation to its role in mineral leaching and other biotechnological applications in industrial metallurgy.

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Section: Magnesiummentioning

confidence: 98%

Biology of Thiobacillus ferrooxidans in relation to the microbiological leaching of sulphide ores

Tuovinen

Kelly

1972

J of Basic Microbiology

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“…By applying first-order kinetics, the rate re of chemical leaching is (12) where [Fe3'I0 is the initial ferric iron concentration and aB is the surface area covered by a bacterium. The term a B X , A indicates the mineral surface area unexposed to the leach solution owing to the adsorption of bacteria.…”

Section: Mathematical Model For Bioleachingmentioning

confidence: 99%

Bioleaching of zinc sulfide concentrate by Thiobacillus ferrooxidans

Konishi

Kubo

Asai

1992

Biotech & Bioengineering

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The kinetics of the bioleaching of ZnS concentrate by Thiobacillus ferrooxidans was studied in a well-mixed batch reactor. Experimental studies were made at 30 degrees C and pH 2.2 on adsorption of the bacteria to the mineral, ferric iron leaching, and bacterial leaching. The adsorption rate of the bacteria was fairly rapid in comparison with the bioleaching rate, indicating that the bacterial adsorption is at equilibrium during the leaching process. The adsorption equilibrium data were correlated by the Langmuir isotherm, which is a useful means for predicting the number of bacteria adsorbed on the mineral surface. The rate of chemical leaching varied with the concentration of ferric iron, and the first-order reaction rate constant was determined. Bioleaching in an iron-containing medium was found to take place by both direct bacterial attack on the sulfide mineral and indirect attack via ferric iron. In this case, the ferric iron was formed from the reaction product (ferrous iron) through the biological oxidation reaction. To develop rate expressions for the kinetics of bacterial growth and zinc leaching, the two bacterial actions were considered. The key parameters appearing in the rate equations, the growth yield and specific growth rate of adsorbed bacteria, were evaluated by curve fitting using the experimental data. This kinetic model allowed us to predict the liquid-phase concentrations of the leached zinc and free cells during the batch bioleaching process.

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“…그러나 박테리아가 중금속 이온에 내 성(tolerance)을 갖게 되면 미생물 용출 효율이 향상된다 (Tuovinen et al, 1971;Das et al, 1998 아의 활성도가 2에서 4.8배 이상으로 향상된다 (Xia et al, 2008). Karimi et al(2010) (Malouf and Prater, 1961;Torma et al, 1970;Natarajan et al, 1994;Das et al, 1998). 박테 리아는 환경에 선택(selection)되고 적응(adaptation) 하면 서 계속 진화(evolution)하는 미생물이다 (Woese, 1987).…”

Section: 서 론unclassified

The Efficiency of Bioleaching Rates for Valuable Metal Ions from the Mine Waste Ore using the Adapted Indigenous Acidophilic Bacteria with Cu Ion

Kim¹,

Wi²,

Choi³

et al. 2012

Journal of Soil and Groundwater Environment

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This study was carried out to leach valuable metal ions from the mine waste ore using the adapted indigenous bacteria. In order to tolerance the heavy metals, the indigenous bacteria were repeatedly subcultured in the adaptation-medium containing CuSO 4 ·5H 2 O for 3 weeks and 6 weeks, respectively. As the adaptation experiment processed, the pH was rapidly decrease in the adaptation-medium of 6 weeks more than the 3 weeks. The result of bioleaching with the adapted bacteria for 42 days, the pH value of leaching-medium in the 3 weeks tend to increased, whereas the pH of the 6 weeks decreased. In decreasing the pH value in the adaptation-medium and in the leaching-medium, it was identified that the indigenous bacteria were adapted Cu 2+ the ion and the mine waste ores. The contents of Cu, Fe and Zn in the leaching solution were usually higher leached in 6 weeks than 3 weeks due to the adaptation. Considering the bioleaching rates of Cu, Fe and Zn from these leaching solutions, the highest increasing the efficiency metal ion were found to be Fe. Accordingly, it is expected that the more valuable element ions can be leached out from the any mine waste, if the adapted bacteria with heavy metals will apply in future bioleaching experiments.

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Microbiological leaching of a zinc sulfide concentrate

Cited by 104 publications

References 34 publications

Biology of Thiobacillus ferrooxidans in relation to the microbiological leaching of sulphide ores

Biology of Thiobacillus ferrooxidans in relation to the microbiological leaching of sulphide ores

Bioleaching of zinc sulfide concentrate by Thiobacillus ferrooxidans

The Efficiency of Bioleaching Rates for Valuable Metal Ions from the Mine Waste Ore using the Adapted Indigenous Acidophilic Bacteria with Cu Ion

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