2018 Fiscal Year Annual Research Report
Galvanic microencapsulation: A novel technique to passivate pyrite and prevent acid mine drainage formation
| Project/Area Number |
17K12831
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| Research Institution | Hokkaido University |
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Principal Investigator |
タベリン カーリット 北海道大学, 工学研究院, 助教 (60626125)
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Keywords | acid mine drainage / microencapsulation / pyrite / passivation / zero-valent iron / iron phosphate / zero-valent aluminum |
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| Outline of Annual Research Achievements |
This research proposed galvanic microencapsulation (GME) as a novel technique to passivate pyrite and prevent acid mine drainage formation and its most important achievements are: (1) galvanic interactions were better under acidic conditions, (2) ZVI was better than ZVAl in suppressing pyrite oxidation, (3) addition of phosphate in pyrite and ZVI system produced Fe-phosphate coatings that limited pyrite oxidation, (4) phosphate-enhanced GME was successfully applied in a ball mill using steel balls as Fe source, (5) GME improved coal and pyrite separation during flotation, (6) Fe-phosphate coatings could be formed at pH 1-3 even without ZVI, and (7) a potentially new process was discovered to create Fe-phosphate coatings on pyrite using acid mine drainage rich in ferrous ions.
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[Journal Article] Arsenic, selenium, boron, lead, cadmium, copper, and zinc in naturally contaminated rocks: A review of their sources, modes of enrichment, mechanisms of release, and mitigation strategies2018
Author(s)
C.B. Tabelin, T. Igarashi, M. Villacorte-Tabelin, I. Park, E.M. Opiso, M. Ito, N. Hiroyoshi
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Journal Title
Science of The Total Environment
Volume: 645
Pages: 1522-1553
DOI
Peer Reviewed / Int'l Joint Research
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