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CHARACTERIZATION OF ARGENTOJAROSITE SYNTHESIZED WITH BIOLOGICALLY PRODUCED FERRIC SULFATE SOLUTIONS

Mukherjee, Chiranjit

Abstract Details

2013, Master of Science, Ohio State University, Microbiology.
Argentojarosite (AgFe3(SO4)2(OH)6) has an important catalytic role in biohydrometallurgical circuits, but to date very little is known about silver-containing compounds with jarosite structure. The purpose of this study was to characterize argentojarosite synthesized via biological oxidation of ferrous sulfate by Acidithiobacillus ferrooxidans. The contact time and Ag+ concentration (added as AgNO3) were varied in these experiments. Synthesis of argentojarosite was confirmed through X-ray diffraction analysis. Additional analysis of solid-phase oxidation products included elemental composition, color and specific surface area. The sample synthesized in the presence of 40 mM Ag+ and with 14 days contact time showed the most crystalline X-ray pattern, and its elemental composition matched well that of ideal argentojarosite. The color and surface area of the remaining samples seemed to be influenced by the presence of a poorly crystalline Fe(III) phase believed to be precursor to schwertmannite (Fe8O8(OH)6SO4), which otherwise remained stable over the time course of 14 days when no Ag+ was present in the system.
Olli Tuovinen, Dr. (Advisor)
61 p.

Recommended Citations

Citations

  • Mukherjee, C. (2013). CHARACTERIZATION OF ARGENTOJAROSITE SYNTHESIZED WITH BIOLOGICALLY PRODUCED FERRIC SULFATE SOLUTIONS [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374139251

    APA Style (7th edition)

  • Mukherjee, Chiranjit. CHARACTERIZATION OF ARGENTOJAROSITE SYNTHESIZED WITH BIOLOGICALLY PRODUCED FERRIC SULFATE SOLUTIONS. 2013. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1374139251.

    MLA Style (8th edition)

  • Mukherjee, Chiranjit. "CHARACTERIZATION OF ARGENTOJAROSITE SYNTHESIZED WITH BIOLOGICALLY PRODUCED FERRIC SULFATE SOLUTIONS." Master's thesis, Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374139251

    Chicago Manual of Style (17th edition)