Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum

Wang, Xingxing; Liao, Rui; Zhao, Hongbo; Hong, Maoxing; Xiao, Huang; Peng, Hong; Wen, Wen; Qin, Wenqing; Qiu, Guanzhou; Huang, Caoming; Wang, Jun

doi:10.1016/j.hydromet.2017.12.003

Cited by 47 publications

(9 citation statements)

References 51 publications

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“…Therefore, according to the results of the XRD patterns (Figures 7 and 8), it is considered that the dissolution process of the bornite is: Cu5FeS4→Cu9Fe9S16→CuFe2S3→CuS→Cu 2+ , which agrees with the conclusion of Wang [18]. Considering that these two kinds of bacteria have similar intermediate species during bornite bioleaching, the following XPS analysis of bornite residues leached by L. ferriphilum was performed.…”

Section: X-ray Photoelectron Spectroscopy Analysissupporting

confidence: 75%

“…Then mooihoekit transforms into isocubanite (CuFe 2 S 3 , PDF#27-0166), as peaks of isocubanite are observed from the 12th day as the reaction proceeds. Wang et al [18] also obtained a similar conclusion when studying the effect of pyrite on bornite bioleaching. Then the characteristic peaks of elemental sulfur (S8, PDF#74-1465) are clearly observed on the 16th day.…”

Section: Cu 5 Fes 4 + 12fe 3+ → 5cu 2+ + 13fe 2+ + 4smentioning

confidence: 54%

“…At the same time, the galvanic effect between these two minerals also accelerated the dissolution process. Wang et al [18] studied the bioleaching of mixed ore of bornite and pyrite by L. ferriphilum. It was found that the addition of pyrite in the mixed ore increased the copper extraction of bornite, which was related to the galvanic effect between them.…”

Section: Introductionmentioning

confidence: 99%

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Intermediates Transformation of Bornite Bioleaching by Leptospirillum ferriphilum and Acidithiobacillus caldus

Hong

Wang

et al. 2019

Minerals

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Bioleaching experiments, electrochemical tests, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were conducted to investigate the intermediates transformation of bornite by Leptospirillum ferriphilum and Acidithiobacillus caldus. The bioleaching experimental results showed that the presence of L. ferriphilum and A. caldus significantly accelerated the bornite bioleaching. In addition, the intermediate species of bornite bioleaching with these two kinds of bacteria were similar. Electrochemical analysis indicated that the dissolution of bornite was an acid-consuming process. The results of XRD showed that intermediate species, namely covellite (CuS), mooihoekit (Cu9Fe9S16) and isocubanite (CuFe2S3), were formed during bornite bioleaching, and a mass of elemental sulfur was formed in the late stage of bioleaching. The Cu 2p photoelectron spectrum revealed that Cu was present in the form of Cu (I) during the bornite bioleaching. Additionally, the S 2p3/2 photoelectron spectrum suggested that S2− and S22− were gradually converted to Sn2−/S0, and the formation of elemental sulfur hindered the further dissolution of the bornite.

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Section: X-ray Photoelectron Spectroscopy Analysissupporting

confidence: 75%

Section: Cu 5 Fes 4 + 12fe 3+ → 5cu 2+ + 13fe 2+ + 4smentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Intermediates Transformation of Bornite Bioleaching by Leptospirillum ferriphilum and Acidithiobacillus caldus

Hong

Wang

et al. 2019

Minerals

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“…This group consists of the genus Acidithiobacillus, Acidiphilium, Acidiphilum, Sulfobacillus and Sulfolobus (Ghosh et al 2016;Jang and Valix 2017;Jalali et al 2019;Huynh et al 2019;Retnaningrum and Wilopo 2019). Whereas, heterotrophic bacteria such as Leptospirillum ferriphilum, Pseudomonas sp., Bacillus sp., and Acinetobacter sp were also reported to be capable of solubilizing metals (Ghost and Thavamani et al 2017;Wang et al 2018;Dong et al 2019;Saleh et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Optimization of manganese bioleaching activity and molecular characterization of indigenous heterotrophic bacteria isolated from the sulfuric area

et al. 2019

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Abstract. Prasidya DA, Wilopo W, Warmada IW, Retnaningrum E. 2019. Optimization of manganese bioleaching activity and molecular characterization of indigenous heterotrophic bacteria isolated from the sulfuric area. Biodiversitas 20: 1904-1909. The present research evaluated the manganese bioleaching potency of a heterotrophic bacteria KB3B1. This bacterial strain has been isolated from sulfuric area located at Ungaran, Middle of Java, Indonesia using modified 9K medium by adding of several organic nutrients. The manganese bioleaching activities of the strain was analysed by applying of varying glycine concentrations (0, 5, 10, 15 mg mL-1) with pyrolusite pulp densities of 0.02 g cm-3 on a rotary shaker at 180 rpm for 18 days incubation. Several parameters, including the growth of bacteria, pH values, the concentration of soluble manganese and cyanide, were investigated at the interval of 3 days. Molecular characteristics of the strain were further analyzed based on 16S rDNA gene sequences. After 15 days, the maximum yield of manganese 16.6% was achieved under the addition of 10 mg mL-1 glycine. This maximum extract obtained was followed by the maximum bacterial growth, pH, and cyanide product of the strain. Phylogenetic analysis showed that the strain was closely related with Bacillus niacini EP89. Besides, the average frequencies of guanine and cytosine (G+C) of the strain was in same range as that of the reference bacteria in the GenBank and Bergey's Manual Systematics of Bacteria.

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“…There are three synchrotron radiation facilities in China to date, Beijing Synchrotron Radiation Facility (BSRF), Shanghai Synchrotron Radiation Facility (SSRF), and the National Synchrotron Radiation Laboratory (NSRL). In the mineral processing and hydrometallurgy research field, SR-based technologies such as SRXRD, SRXPS, and XANES were mainly used to study the fine phase transformation and variation of chemical substances on the mineral surface [39][40][41][42][43][44][45]. In this paper, synthetic chalcocite was chosen as the research object, and SRXRD was employed to explore the fine phase transformation mechanism in chalcocite acidic ferric sulfate leaching.…”

Section: Introductionmentioning

confidence: 99%

Synchrotron Radiation XRD Investigation of the Fine Phase Transformation during Synthetic Chalcocite Acidic Ferric Sulfate Leaching

Fang

Wang

et al. 2018

Minerals

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The fine phase transformation process of chalcocite (Cu2S) leaching in acidic ferric sulfate solution was studied by leaching experiments and synchrotron radiation X-ray diffraction (SRXRD) tests. The results showed that the dissolution process of chalcocite was divided into two stages. In the first stage, Cu2S was firstly transformed to Cu5FeS4 and Cu2−xS, then the galvanic effect between Cu5FeS4 and Cu2−xS accelerated the dissolution process of Cu1.8S → Cu1.6S → CuS, and finally Cu5FeS4 was also transformed to CuS. While in the second stage, CuS was transformed to elemental sulfur, which formed the passivation layer and inhibited the leaching of chalcocite. Specifically, Cu5FeS4 was detected during the chalcocite leaching process by SRXRD for the first time. This research is helpful for revealing the detailed leaching process of chalcocite.

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Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum

Cited by 47 publications

References 51 publications

Intermediates Transformation of Bornite Bioleaching by Leptospirillum ferriphilum and Acidithiobacillus caldus

Intermediates Transformation of Bornite Bioleaching by Leptospirillum ferriphilum and Acidithiobacillus caldus

Optimization of manganese bioleaching activity and molecular characterization of indigenous heterotrophic bacteria isolated from the sulfuric area

Synchrotron Radiation XRD Investigation of the Fine Phase Transformation during Synthetic Chalcocite Acidic Ferric Sulfate Leaching

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