Immobilization of Acidithiobacillus ferrooxidans on sulfonated microporous poly(styrene–divinylbenzene) copolymer with granulated activated carbon and its use in bio-oxidation of ferrous iron

Köseoğlu-İmer, Derya Y.; Keskinler, Bülent

doi:10.1016/j.msec.2012.08.003

Cited by 8 publications

(6 citation statements)

References 32 publications

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“…According to Table 1, the maximum ferrous iron biooxidation rate (R) of 2.46 kg m -3 h -1 was obtained at the highest dilution rate (D) with biological oxidation efficiency of 70.2%. A comparable result was reported by Koseoglu-Imer and Keskinler [11], which have employed sulfonated poly (styrene-divinylbenzene) copolymer with granular activated carbon for Figure 5. Schematic of bioreactor: (1) packed bed column, (2) fresh medium, (3) peristaltic pump, (4) air pump, (5) gas flow meter, (6) filter, (7) humidifier, (8) effluent culture immobilization of A. ferrooxidans.…”

Section: Continuous Bio-oxidationsupporting

confidence: 84%

“…The free cell concentration was directly counted using a Neubauer chamber (haemocytometer) of 0.1 mm depth and 1/400 mm 2 area. Ferrous iron concentration was determined by a colorimetric procedure using 1,10-phenanthroline method [11]. Scanning Electron Microscopy (SEM) (model MIRA III, TESCAN, Czech Republic) analysis was carried out for monitoring the surface of the hemp fibres.…”

Section: Methodsmentioning

confidence: 99%

“…Up to now, various matrices have been used for immobilization process in ferrous iron bio-oxidation via entrapment or surface adhesion methods. The commonly used matrices were polyurethane foam [9][10][11], activated carbon [3,12], and complex of poly (vinyl alcohol) and sodium alginate [13]. Other includes refractory clay tiles [14], and cotton gauze [7].…”

Section: Introductionmentioning

confidence: 99%

“…Microorganism and Cultivation Acidithiobacillus ferrooxidans (PTCC 1646) was purchased from Iranian Research Organization for Science & Technology (IROST). The basal salt medium consisted of (in kg m -3 ) (NH4)2SO4, 0.4; MgSO4•7H2O, 0.4; K2HPO4, 0.4 [11], devoid of ferrous iron. The initial ferrous iron concentration for cell growth, immobilization, and bioreactor continuous operation were 6.7, 5, and 1 kg m -3 , respectively.…”

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confidence: 99%

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Hemp Fibres as Novel Green Support Material for Immobilization of Acidithiobacillus ferrooxidans

Akhlaghi

2019

IJE

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The suitability of hemp fibres as green support material for immobilization of Acidithiobacillus ferrooxidans cells in ferrous iron bio-oxidation process was investigated. A series of experiments were carried out in shake flasks and bioreactor for both cell immobilization and iron bio-oxidation. In flask experiments, five successive batch colonization cycles resulted in 6-fold increase in ferrous iron biooxidation rate. Evaluation of immobilized cells activity through two approaches as wet and dry storage demonstrated the higher activity of wet stored bacteria than dry ones after a period of two months. The dry stored bacteria lost almost all their activities after eight weeks. Whereas, the activity of wet stored samples was 30% at the same time. In bioreactor experiments, use of a packed-bed bioreactor with hemp fibres, the maximum ferrous iron bio-oxidation rate of 2.46 kg m -3 h -1 was obtained at dilution rate of 3.97 h -1 , and retention time of 0.25 h. Our experimental results could pave a new platform for the application of hemp fibre as an inexpensive and environmentally friendly support material in bacterial cell immobilization, especially in ferrous iron bio-oxidation process using acidophilic bacteria.

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Section: Continuous Bio-oxidationsupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Hemp Fibres as Novel Green Support Material for Immobilization of Acidithiobacillus ferrooxidans

Akhlaghi

2019

IJE

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“…Owing to the natural tendency of A. ferrooxidans , the biological oxidation rate can be enhanced by immobilized A. ferrooxidans . Therefore, the immobilization of A. ferrooxidans was widely studied in an attempt to increase ferrous iron oxidation rate .…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Acidithiobacillus ferrooxidans on cotton gauze for biological oxidation of ferrous ions in a batch bioreactor

Zhu

Shi

Shang

et al. 2017

Biotech and App Biochem

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The ability of Acidithiobacillus ferrooxidans to oxidize ferrous iron has been extensively studied in bioleaching to recover metal resources. Although immobilization of A. ferrooxidans is of great importance to achieve high bioleaching performance in practical application, the reported approaches of immobilization of A. ferrooxidans are still limited. This paper is attempting to develop a novel method to immobilize A. ferrooxidans by a less-costly effective carrier from zeolite, activated carbon, and cotton gauze. The results showed that cotton gauze was the most suitable carrier to immobilize A. ferrooxidans cells in comparison with zeolite and activated carbon. Acidithiobacillus ferrooxidans immobilized on the cotton gauze by gravity dehydration could achieve an average ferrous iron oxidation rate of 0.73 g/(L·h). Furthermore, the ferrous iron oxidation ratio attained in the bioreactor under batch operation was maintained above 97.83%. All results indicated that cotton gauze could be an efficient carrier for immobilizing A. ferrooxidans cells for the biooxidation of ferrous ions.

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Immobilization of Acidithiobacillus ferrooxidans on Cotton Gauze for the Bioleaching of Waste Printed Circuit Boards

Nie

Zhu

Cao

et al. 2015

Appl Biochem Biotechnol

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The bioleaching parameters of metal concentrates from waste printed circuit boards by Acidithiobacillus ferrooxidans immobilized on cotton gauze in a two-step reactor were investigated in this study. The results indicated that an average ferrous iron oxidation rate of 0.54 g/(L·h) and a ferrous iron oxidation ratio of 96.90 % were obtained after 12 h at aeration rate of 1 L/min in bio-oxidation reactor. After 96 h, the highest leaching efficiency of copper reached 91.68 % under the conditions of the content of the metal powder 12 g/L, the retention time 6 h, and the aeration rate 1 L/min. The bioleaching efficiency of copper could be above 91.12 % under repeated continuous batch operation. Meanwhile, 95.32 % of zinc, 90.32 % of magnesium, 86.31 % of aluminum, and 59.07 % of nickel were extracted after 96 h. All the findings suggested that the recovery of metal concentrates from waste printed circuit boards via immobilization of A. ferrooxidans on cotton gauze was feasible.

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Immobilization of Acidithiobacillus ferrooxidans on sulfonated microporous poly(styrene–divinylbenzene) copolymer with granulated activated carbon and its use in bio-oxidation of ferrous iron

Cited by 8 publications

References 32 publications

Hemp Fibres as Novel Green Support Material for Immobilization of Acidithiobacillus ferrooxidans

Hemp Fibres as Novel Green Support Material for Immobilization of Acidithiobacillus ferrooxidans

Immobilization of Acidithiobacillus ferrooxidans on cotton gauze for biological oxidation of ferrous ions in a batch bioreactor

Immobilization of Acidithiobacillus ferrooxidans on Cotton Gauze for the Bioleaching of Waste Printed Circuit Boards

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