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Bioxidative dissolution of cinnabar by iron-oxidizing bacteria

Paper ID Volume ID Publish Year Pages File Format Full-Text
3407 168 2013 5 PDF Available
Title
Bioxidative dissolution of cinnabar by iron-oxidizing bacteria
Abstract

In the present study, bioleaching characteristic of cinnabar and process parameters were investigated. The effects of temperature, initial pH of the solution, dilution rate and iron on the cinnabar bioleaching were examined. The relationship between the redox potential and extraction of mercury was evaluated. Based on the S/N ratio, the optimized conditions for bioleaching were established. Iron of the solution was the most effective parameter in comparison with others. A maximum mercury concentration of 1.38 g/L was achieved. The indirect mechanism plays a major role in bioleaching. Some jarosite crystal deposits could be found when the iron concentration was 4.0 g/L and initial pH was 1.9. The bioxidation of sulfur could inhibit the hydrolyzation of ferric iron. Regulating pH value and ion concentration in medium could control the formation of the precipitation.

Graphical abstractCinnabar leaching in chemobiological system and process parameters was investigated. The effect of temperature, initial pH of the solution, dilution rate and iron was studied. The results indicate a good leaching characteristic of cinnabar in the chemobiological reactor, where a maximum mercury concentration of 1.38 g/L was achieved.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Process parameters and characteristic of cinnabar bioleaching were investigated. ► The optimized conditions for bioleaching were established. ► A maximum Hg concentration of 1.38 g/L was achieved. ► Iron concentration was the most effective parameter. ► Bioprocess of A. ferrooxidans plays a major role in cinnabar dissolution.

Keywords
Bioconversion; Cinnabar; Leaching; Immobilization; Optimization; Bioreactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 74, 15 May 2013, Pages 102–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us