Biodepyritisation of coal

Acharya, Celin; Sukla, Lala Behari; Misra, V. N.

doi:10.1002/jctb.929

Cited by 23 publications

(9 citation statements)

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“…But, the 2Ɵ peaks at 26 which assigned the mineral jarosite (Ja), enhanced during both of the bioleaching and abiotic processes. Jarosite as a sulfate mineral is formed in ore deposits after the oxidation of iron sulfides (Acharya et al 2004;Cardona and Marquez 2009). In fact, this mineral was precipitated during the treatments.…”

Section: Temporal Monitoring Of the Bioleaching Processmentioning

confidence: 99%

“…Several attempts have been made to explain the direct attack of A. ferrooxidans on the metal sulfides. It can be considered as a heterogeneous process which the bacterial cell attaches itself to the sulfide crystal surface and the corrosion occurs in a thin film located in the interface between the bacterial outer membrane and the sulfide surface (Acharya et al 2004;Bellenberg et al 2015;Manisha et al 2000;Rodriguez et al 2003 …”

Section: Temporal Monitoring Of the Bioleaching Processmentioning

confidence: 99%

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Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Kourdestani

Habibi

Ahmadi

2016

Geomicrobiology Journal

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In the present study, the potential application of Acidithiobacillus ferrooxidans for elimination of ash and sulfur from bitumen was investigated in batch experiments. A comparison between the bioleaching and abiotic treatments indicated that A. ferrooxidans cells enhanced ash and pyritic sulfur removal by 20 and 59%, respectively. The X-ray diffraction profiles of the samples indicated the precipitation of some mineral elements inside of bitumen decreased the bioleaching performance after 9 days from beginning of the experiments. The effects of bitumen particle size (X 1 ), agitation speed (X 2 ) and initial pH (X 3 ) as interfacial factors each at three levels on the ash removal (Y 1 ) and pyritic sulfur removal (Y 2 ) were investigated by response surface methodology (RSM) as a statistical design of the experiment. On the basis of quadratic models applied to the performance of the bioleaching process, 66.42% of the pyritic sulfur and 50.88% of the ash could be removed after 9 days under optimal conditions, namely a bitumen particle size of 100 µm, an agitation speed of 80 rpm, and in initial pH of 2.

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Section: Temporal Monitoring Of the Bioleaching Processmentioning

confidence: 99%

Section: Temporal Monitoring Of the Bioleaching Processmentioning

confidence: 99%

Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Kourdestani

Habibi

Ahmadi

2016

Geomicrobiology Journal

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“…Gel-type resins did not extract large amounts of Fe(III), while macroporous acrylic resins and macroporous methacrylic resins were efficient and selective extractants, although removal by the latter resins was strongly pH dependent. Acharya et al (2004) reviewed research activities on biodesulfurisation of coal. The authors provided insight into various methods of desulfurisation of coal, including both physical and biological methods, and combinations thereof.…”

Section: Biological Characterization and Treatmentmentioning

confidence: 99%

Minerals and Mine Drainage

Marchand¹,

Plumb²

2005

Water Environment Research

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reviews literature published in 2004 pertaining to environmental processes that affect mineral dissolution reactions and the generation of acid mine drainage (AMD), the fate and transport of metal contaminants within the environment, the toxic influences of metals and mine drainage on aquatic organisms and plant species, characterization of abandoned mines and their potential for contamination, and technologies for remediation of mining-impacted systems or removing metals from acid drainage wastewater streams. Since there are a great number of studies focusing on minerals in subsurface environments, this review will be limited in scope to mineral systems influenced by mining activity or anthropogenic disturbances related to mining. SITE CHARACTERIZATION AND ASSESSMENTThis section of the review highlights published works relating to the quantitative description of mining sites or mineral systems. Included in this description are several new techniques for predicting whether a particular site will be prone to producing pollution. In a study aimed at assessing whether flooded underground mines were homogeneous throughout their depth profile, Nuttall and Younger (2004) reported that 1859 hydrochemical stratification did in fact occur in a flooded mine in Frances Colliery, Scotland. The authors reported that for this particular system, less polluted water tended to collect at the top of the water column with much of the more polluted water remaining at the bottom. Upon disturbing the stratification, it was found that the mixed concentrations of iron and zinc were about 100 times higher than the concentrations measured in the undisturbed surface water.Several studies have used spectroscopic techniques to assess metal contamination in sediments. A study of arsenic speciation in several mining waste piles and contaminated soils in the Czech Republic was performed by Filippi et al. (2004) using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive microanalysis (EDAX). The study found that although the native arsenic mineralogy amongst the three mining areas researched was very similar in nature and origin, the arsenic was associated with different products in the sediment and waste piles, suggesting that site-specific conditions were the primary factors in controlling the fate of arsenic. Osan et al. (2004) characterized the anthropogenic particles in river sediment in the Romanian part of the Tisza catchment area following failure of a tailings dam. The authors utilized single-particle electron probe X-ray microanalysis (EPMA) and synchrotron radiation-based microbeam X-ray emission and absorption methods to identify trace element content, heterogeneity, and heavy metal speciation. Overall, it was found that the majority of the heavy metals released from the tailings area remained in a stable sulfide form, thereby limiting the metal mobility to the river. Characterization of the heavy metal pollution and acid drainage from an abandoned lead-and zinc-sulfide mine in Turkey by Aykol et al. (20...

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“…The combustion of coal containing high sulfur causes serious environmental problems (e.g., acid rain) due to the emission of sulfur dioxide (Acharya et al 2004). Pyrite is the main inorganic sulfur compound in high sulfur coal and has served as a model compound of inorganically bound sulfur in investigations of desulfurization (Weerasekara et al 2008).…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Biodesulfurization Efficiency of Acidithiobacillus ferrooxidans LY01 Cells Domesticated with Ferrous Iron and Pyrite

Yang

Wang

Liu

et al. 2016

Geomicrobiology Journal

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The high-sulfur coal desulfurization process completed by A. ferrooxidans LY01 cells domesticated with either ferrous iron [Fe(Ⅱ)] or pyrite (FeS 2 ) was investigated in this paper. The desulfurization rate for 13 d was as high as 67.8% for the LY01 cells domesticated with pyrite but was only 45.6% for the LY01 cells domesticated with Fe(Ⅱ). Bacterial adsorption experiments indicated that the bacterial adsorption quantity onto the pyrite particles was similar to the desulfurization efficiency. FTIR analysis showed that chemical composition of the two cell Downloaded by [New York University] at 05:04 07 July 2015 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 types was similar, but the LY01 cells domesticated with pyrite had higher levels of hydrophobic aromatic R-O groups than cells domesticated with Fe(Ⅱ). The amount of extracellular polymericsubstances (EPS) from the pyrite-domesticated LY01 cells was 1820 μg C/10 10 cells, which was five times more than the amount of EPS in the Fe(Ⅱ)-domesticated cells; the EPS readily bound Fe(Ⅲ) with a maximum binding capacity of 0.21 mg Fe(Ⅲ) per mg C EPS. Strains of pyritedomesticated LY01 with a high amount of Fe(Ⅲ) in their EPS possess greater oxidation activity than Fe(Ⅱ)-domesticated strains with fewer Fe(Ⅲ). These experiments showed the importance of the substrate-specific differences in the oxidative activity of A. ferrooxidans LY01. In addition, this study provides theoretical guidance for the future optimization of the biodesulfurization process.

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Biodepyritisation of coal

Cited by 23 publications

References 80 publications

Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Minerals and Mine Drainage

A Comparative Study of the Biodesulfurization Efficiency of Acidithiobacillus ferrooxidans LY01 Cells Domesticated with Ferrous Iron and Pyrite

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